Update README.md

Remove section on performance, I can not replicate this and don't want to cause controversy.
Update README.md
2025-12-16 01:20:52 -08:00 · 2020-02-03 20:54:19 +00:00 · 2020-02-03 20:52:12 +00:00 · 2020-02-03 20:31:37 +00:00 · 2020-01-29 18:36:13 -06:00 · 2020-01-29 18:36:13 -06:00
17 changed files with 1518 additions and 660 deletions
--- a/.github/workflows/CICD.yml
+++ b/.github/workflows/CICD.yml
@@ -0,0 +1,286 @@
+name: CICD
+
+# spell-checker:ignore CICD CODECOV MSVC MacOS Peltoche SHAs buildable clippy esac fakeroot gnueabihf halium libssl mkdir musl popd printf pushd rustfmt softprops toolchain
+
+env:
+  PROJECT_NAME: dust
+  PROJECT_DESC: "du + rust = dust"
+  PROJECT_AUTH: "bootandy"
+  RUST_MIN_SRV: "1.31.0"
+
+on: [push, pull_request]
+
+jobs:
+  style:
+    name: Style
+    runs-on: ${{ matrix.job.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        job:
+          - { os: ubuntu-latest }
+          - { os: macos-latest }
+          - { os: windows-latest }
+    steps:
+    - uses: actions/checkout@v1
+    - name: Initialize workflow variables
+      id: vars
+      shell: bash
+      run: |
+        # 'windows-latest' `cargo fmt` is bugged for this project (see reasons @ GH:rust-lang/rustfmt #3324, #3590, #3688 ; waiting for repair)
+        JOB_DO_FORMAT_TESTING="true"
+        case ${{ matrix.job.os }} in windows-latest) unset JOB_DO_FORMAT_TESTING ;; esac;
+        echo set-output name=JOB_DO_FORMAT_TESTING::${JOB_DO_FORMAT_TESTING:-<empty>/false}
+        echo ::set-output name=JOB_DO_FORMAT_TESTING::${JOB_DO_FORMAT_TESTING}
+    - name: Install `rust` toolchain
+      uses: actions-rs/toolchain@v1
+      with:
+        toolchain: stable
+        override: true
+        profile: minimal # minimal component installation (ie, no documentation)
+        components: rustfmt, clippy
+    - name: "`fmt` testing"
+      if: steps.vars.outputs.JOB_DO_FORMAT_TESTING
+      uses: actions-rs/cargo@v1
+      with:
+        command: fmt
+        args: --all -- --check
+    - name: "`clippy` testing"
+      if: success() || failure() # run regardless of prior step ("`fmt` testing") success/failure
+      uses: actions-rs/cargo@v1
+      with:
+        command: clippy
+        args: ${{ matrix.job.cargo-options }} --features "${{ matrix.job.features }}" -- -D warnings
+
+  min_version:
+    name: MinSRV # Minimum supported rust version
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v1
+    - name: Install `rust` toolchain (v${{ env.RUST_MIN_SRV }})
+      uses: actions-rs/toolchain@v1
+      with:
+        toolchain: ${{ env.RUST_MIN_SRV }}
+        profile: minimal # minimal component installation (ie, no documentation)
+    - name: Test
+      uses: actions-rs/cargo@v1
+      with:
+        command: test
+
+  build:
+    name: Build
+    runs-on: ${{ matrix.job.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        job:
+          # { os, target, cargo-options, features, use-cross, toolchain }
+          - { os: ubuntu-latest  , target: arm-unknown-linux-gnueabihf , use-cross: use-cross }
+          - { os: ubuntu-18.04   , target: i686-unknown-linux-gnu      , use-cross: use-cross }
+          - { os: ubuntu-18.04   , target: i686-unknown-linux-musl     , use-cross: use-cross }
+          - { os: ubuntu-18.04   , target: x86_64-unknown-linux-gnu    , use-cross: use-cross }
+          - { os: ubuntu-18.04   , target: x86_64-unknown-linux-musl   , use-cross: use-cross }
+          - { os: ubuntu-16.04   , target: x86_64-unknown-linux-gnu    , use-cross: use-cross }
+          - { os: macos-latest   , target: x86_64-apple-darwin         }
+          - { os: windows-latest , target: i686-pc-windows-gnu         }
+          - { os: windows-latest , target: i686-pc-windows-msvc        }
+          - { os: windows-latest , target: x86_64-pc-windows-gnu       } ## !maint: [rivy; 2020-01-21] may break due to rust bug; follow possible solution from GH:rust-lang/rust#47048 (refs: GH:rust-lang/rust#47048 , GH:rust-lang/rust#53454 , GH:bike-barn/hermit#172 )
+          - { os: windows-latest , target: x86_64-pc-windows-msvc      }
+    steps:
+    - uses: actions/checkout@v1
+    - name: Install any prerequisites
+      shell: bash
+      run: |
+        case ${{ matrix.job.target }} in
+          arm-unknown-linux-gnueabihf) sudo apt-get -y update ; sudo apt-get -y install gcc-arm-linux-gnueabihf ;;
+        esac
+    - name: Initialize workflow variables
+      id: vars
+      shell: bash
+      run: |
+        # toolchain
+        TOOLCHAIN="stable" ## default to "stable" toolchain
+        # * specify alternate TOOLCHAIN for *-pc-windows-gnu targets; gnu targets on Windows are broken for the standard *-pc-windows-msvc toolchain (refs: <https://github.com/rust-lang/rust/issues/47048>, <https://github.com/rust-lang/rust/issues/53454>, <https://github.com/rust-lang/cargo/issues/6754>)
+        case ${{ matrix.job.target }} in *-pc-windows-gnu) TOOLCHAIN="stable-${{ matrix.job.target }}" ;; esac;
+        # * use requested TOOLCHAIN if specified
+        if [ -n "${{ matrix.job.toolchain }}" ]; then TOOLCHAIN="${{ matrix.job.toolchain }}" ; fi
+        echo set-output name=TOOLCHAIN::${TOOLCHAIN}
+        echo ::set-output name=TOOLCHAIN::${TOOLCHAIN}
+        # staging directory
+        STAGING='_staging'
+        echo set-output name=STAGING::${STAGING}
+        echo ::set-output name=STAGING::${STAGING}
+        # determine EXE suffix
+        EXE_suffix="" ; case ${{ matrix.job.target }} in *-pc-windows-*) EXE_suffix=".exe" ;; esac;
+        echo set-output name=EXE_suffix::${EXE_suffix}
+        echo ::set-output name=EXE_suffix::${EXE_suffix}
+        # parse commit reference info
+        REF_NAME=${GITHUB_REF#refs/*/}
+        unset REF_BRANCH ; case ${GITHUB_REF} in refs/heads/*) REF_BRANCH=${GITHUB_REF#refs/heads/} ;; esac;
+        unset REF_TAG ; case ${GITHUB_REF} in refs/tags/*) REF_TAG=${GITHUB_REF#refs/tags/} ;; esac;
+        REF_SHAS=${GITHUB_SHA:0:8}
+        echo set-output name=REF_NAME::${REF_NAME}
+        echo set-output name=REF_BRANCH::${REF_BRANCH}
+        echo set-output name=REF_TAG::${REF_TAG}
+        echo set-output name=REF_SHAS::${REF_SHAS}
+        echo ::set-output name=REF_NAME::${REF_NAME}
+        echo ::set-output name=REF_BRANCH::${REF_BRANCH}
+        echo ::set-output name=REF_TAG::${REF_TAG}
+        echo ::set-output name=REF_SHAS::${REF_SHAS}
+        # parse target
+        unset TARGET_ARCH ; case ${{ matrix.job.target }} in arm-unknown-linux-gnueabihf) TARGET_ARCH=arm ;; i686-*) TARGET_ARCH=i686 ;; x86_64-*) TARGET_ARCH=x86_64 ;; esac;
+        echo set-output name=TARGET_ARCH::${TARGET_ARCH}
+        echo ::set-output name=TARGET_ARCH::${TARGET_ARCH}
+        unset TARGET_OS ; case ${{ matrix.job.target }} in *-linux-*) TARGET_OS=linux ;; *-apple-*) TARGET_OS=macos ;; *-windows-*) TARGET_OS=windows ;; esac;
+        echo set-output name=TARGET_OS::${TARGET_OS}
+        echo ::set-output name=TARGET_OS::${TARGET_OS}
+        # package name
+        PKG_suffix=".tar.gz" ; case ${{ matrix.job.target }} in *-pc-windows-*) PKG_suffix=".zip" ;; esac;
+        PKG_BASENAME=${PROJECT_NAME}-${REF_TAG:-$REF_SHAS}-${{ matrix.job.target }}
+        PKG_NAME=${PKG_BASENAME}${PKG_suffix}
+        echo set-output name=PKG_suffix::${PKG_suffix}
+        echo set-output name=PKG_BASENAME::${PKG_BASENAME}
+        echo set-output name=PKG_NAME::${PKG_NAME}
+        echo ::set-output name=PKG_suffix::${PKG_suffix}
+        echo ::set-output name=PKG_BASENAME::${PKG_BASENAME}
+        echo ::set-output name=PKG_NAME::${PKG_NAME}
+        # deployable tag? (ie, leading "vM" or "M"; M == version number)
+        unset DEPLOY ; if [[ $REF_TAG =~ ^[vV]?[0-9].* ]]; then DEPLOY='true' ; fi
+        echo set-output name=DEPLOY::${DEPLOY:-<empty>/false}
+        echo ::set-output name=DEPLOY::${DEPLOY}
+        # target-specific options
+        # * CARGO_USE_CROSS (truthy)
+        CARGO_USE_CROSS='true' ; case '${{ matrix.job.use-cross }}' in ''|0|f|false|n|no) unset CARGO_USE_CROSS ;; esac;
+        echo set-output name=CARGO_USE_CROSS::${CARGO_USE_CROSS:-<empty>/false}
+        echo ::set-output name=CARGO_USE_CROSS::${CARGO_USE_CROSS}
+        # # * `arm` cannot be tested on ubuntu-* hosts (b/c testing is currently primarily done via comparison of target outputs with built-in outputs and the `arm` target is not executable on the host)
+        JOB_DO_TESTING="true"
+        case ${{ matrix.job.target }} in arm-*) unset JOB_DO_TESTING ;; esac;
+        echo set-output name=JOB_DO_TESTING::${JOB_DO_TESTING:-<empty>/false}
+        echo ::set-output name=JOB_DO_TESTING::${JOB_DO_TESTING}
+        # # * test only binary for arm-type targets
+        unset CARGO_TEST_OPTIONS
+        unset CARGO_TEST_OPTIONS ; case ${{ matrix.job.target }} in arm-*) CARGO_TEST_OPTIONS="--bin ${PROJECT_NAME}" ;; esac;
+        echo set-output name=CARGO_TEST_OPTIONS::${CARGO_TEST_OPTIONS}
+        echo ::set-output name=CARGO_TEST_OPTIONS::${CARGO_TEST_OPTIONS}
+        # * strip executable?
+        STRIP="strip" ; case ${{ matrix.job.target }} in arm-unknown-linux-gnueabihf) STRIP="arm-linux-gnueabihf-strip" ;; *-pc-windows-msvc) STRIP="" ;; esac;
+        echo set-output name=STRIP::${STRIP}
+        echo ::set-output name=STRIP::${STRIP}
+    - name: Create all needed build/work directories
+      shell: bash
+      run: |
+        mkdir -p '${{ steps.vars.outputs.STAGING }}'
+        mkdir -p '${{ steps.vars.outputs.STAGING }}/${{ steps.vars.outputs.PKG_BASENAME }}'
+    - name: rust toolchain ~ install
+      uses: actions-rs/toolchain@v1
+      with:
+        toolchain: ${{ steps.vars.outputs.TOOLCHAIN }}
+        target: ${{ matrix.job.target }}
+        override: true
+        profile: minimal # minimal component installation (ie, no documentation)
+    - name: Info
+      shell: bash
+      run: |
+        gcc --version || true
+        rustup -V
+        rustup toolchain list
+        rustup default
+        cargo -V
+        rustc -V
+    - name: Build
+      uses: actions-rs/cargo@v1
+      with:
+        use-cross: ${{ steps.vars.outputs.CARGO_USE_CROSS }}
+        command: build
+        args: --release --target=${{ matrix.job.target }} ${{ matrix.job.cargo-options }} --features "${{ matrix.job.features }}"
+    - name: Test
+      uses: actions-rs/cargo@v1
+      with:
+        use-cross: ${{ steps.vars.outputs.CARGO_USE_CROSS }}
+        command: test
+        args: --target=${{ matrix.job.target }} ${{ steps.vars.outputs.CARGO_TEST_OPTIONS}} ${{ matrix.job.cargo-options }} --features "${{ matrix.job.features }}"
+    - name: Archive executable artifacts
+      uses: actions/upload-artifact@master
+      with:
+        name: ${{ env.PROJECT_NAME }}-${{ matrix.job.target }}
+        path: target/${{ matrix.job.target }}/release/${{ env.PROJECT_NAME }}${{ steps.vars.outputs.EXE_suffix }}
+    - name: Package
+      shell: bash
+      run: |
+        # binary
+        cp 'target/${{ matrix.job.target }}/release/${{ env.PROJECT_NAME }}${{ steps.vars.outputs.EXE_suffix }}' '${{ steps.vars.outputs.STAGING }}/${{ steps.vars.outputs.PKG_BASENAME }}/'
+        # `strip` binary (if needed)
+        if [ -n "${{ steps.vars.outputs.STRIP }}" ]; then "${{ steps.vars.outputs.STRIP }}" '${{ steps.vars.outputs.STAGING }}/${{ steps.vars.outputs.PKG_BASENAME }}/${{ env.PROJECT_NAME }}${{ steps.vars.outputs.EXE_suffix }}' ; fi
+        # README and LICENSE
+        cp README.md '${{ steps.vars.outputs.STAGING }}/${{ steps.vars.outputs.PKG_BASENAME }}/'
+        cp LICENSE '${{ steps.vars.outputs.STAGING }}/${{ steps.vars.outputs.PKG_BASENAME }}/'
+        # base compressed package
+        pushd '${{ steps.vars.outputs.STAGING }}/' >/dev/null
+        case ${{ matrix.job.target }} in
+          *-pc-windows-*) 7z -y a '${{ steps.vars.outputs.PKG_NAME }}' '${{ steps.vars.outputs.PKG_BASENAME }}'/* | tail -2 ;;
+          *) tar czf '${{ steps.vars.outputs.PKG_NAME }}' '${{ steps.vars.outputs.PKG_BASENAME }}'/* ;;
+        esac;
+        popd >/dev/null
+    - name: Publish
+      uses: softprops/action-gh-release@v1
+      if: steps.vars.outputs.DEPLOY
+      with:
+        files: |
+          ${{ steps.vars.outputs.STAGING }}/${{ steps.vars.outputs.PKG_NAME }}
+      env:
+        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+
+  ## fix! [rivy; 2020-22-01] `cargo tarpaulin` is unable to test this repo at the moment; alternate recipe or another testing framework?
+  # coverage:
+  #   name: Code Coverage
+  #   runs-on: ${{ matrix.job.os }}
+  #   strategy:
+  #     fail-fast: true
+  #     matrix:
+  #       # job: [ { os: ubuntu-latest }, { os: macos-latest }, { os: windows-latest } ]
+  #       job: [ { os: ubuntu-latest } ] ## cargo-tarpaulin is currently only available on linux
+  #   steps:
+  #   - uses: actions/checkout@v1
+  #   # - name: Reattach HEAD ## may be needed for accurate code coverage info
+  #   #   run: git checkout ${{ github.head_ref }}
+  #   - name: Initialize workflow variables
+  #     id: vars
+  #     shell: bash
+  #     run: |
+  #       # staging directory
+  #       STAGING='_staging'
+  #       echo set-output name=STAGING::${STAGING}
+  #       echo ::set-output name=STAGING::${STAGING}
+  #       # check for CODECOV_TOKEN availability (work-around for inaccessible 'secrets' object for 'if'; see <https://github.community/t5/GitHub-Actions/jobs-lt-job-id-gt-if-does-not-work-with-env-secrets/m-p/38549>)
+  #       unset HAS_CODECOV_TOKEN
+  #       if [ -n $CODECOV_TOKEN ]; then HAS_CODECOV_TOKEN='true' ; fi
+  #       echo set-output name=HAS_CODECOV_TOKEN::${HAS_CODECOV_TOKEN}
+  #       echo ::set-output name=HAS_CODECOV_TOKEN::${HAS_CODECOV_TOKEN}
+  #     env:
+  #       CODECOV_TOKEN: "${{ secrets.CODECOV_TOKEN }}"
+  #   - name: Create all needed build/work directories
+  #     shell: bash
+  #     run: |
+  #       mkdir -p '${{ steps.vars.outputs.STAGING }}/work'
+  #   - name: Install required packages
+  #     run: |
+  #       sudo apt-get -y install libssl-dev
+  #       pushd '${{ steps.vars.outputs.STAGING }}/work' >/dev/null
+  #       wget --no-verbose https://github.com/xd009642/tarpaulin/releases/download/0.9.3/cargo-tarpaulin-0.9.3-travis.tar.gz
+  #       tar xf cargo-tarpaulin-0.9.3-travis.tar.gz
+  #       cp cargo-tarpaulin "$(dirname -- "$(which cargo)")"/
+  #       popd >/dev/null
+  #   - name: Generate coverage
+  #     run: |
+  #       cargo tarpaulin --out Xml
+  #   - name: Upload coverage results (CodeCov.io)
+  #     # CODECOV_TOKEN (aka, "Repository Upload Token" for REPO from CodeCov.io) ## set via REPO/Settings/Secrets
+  #     # if: secrets.CODECOV_TOKEN (not supported {yet?}; see <https://github.community/t5/GitHub-Actions/jobs-lt-job-id-gt-if-does-not-work-with-env-secrets/m-p/38549>)
+  #     if: steps.vars.outputs.HAS_CODECOV_TOKEN
+  #     run: |
+  #       # CodeCov.io
+  #       cargo tarpaulin --out Xml
+  #       bash <(curl -s https://codecov.io/bash)
+  #     env:
+  #       CODECOV_TOKEN: "${{ secrets.CODECOV_TOKEN }}"
--- a/.gitignore
+++ b/.gitignore
@@ -6,3 +6,4 @@
 **/*.rs.bk
 *.swp
 .vscode/*
+*.idea/*
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,6 +1,12 @@
 # Based on the "trust" template v0.1.2
 # https://github.com/japaric/trust/tree/v0.1.2

+# ----------- To do a release ---------
+# tag a commit and push:
+#   git tag v0.4.0.1
+#   git push origin v0.4.0.1
+# Remember to do a cargo publish to put it in crates.io
+
 dist: trusty
 language: rust
 services: docker
@@ -46,8 +52,9 @@ deploy:
  # - Create a `public_repo` GitHub token. Go to: https://github.com/settings/tokens/new
  # - Encrypt it: `travis encrypt 0123456789012345678901234567890123456789
  # - Paste the output down here
-  api_key:
-    secure: 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
+#  api_key:
+#    secure: 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
+  api_key: $API_KEY
  file_glob: true
  file: $CRATE_NAME-$TRAVIS_TAG-$TARGET.*
  on:
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1,280 +1,407 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
 [[package]]
 name = "ansi_term"
 version = "0.11.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "winapi 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)",
+ "winapi 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "ansi_term"
+version = "0.12.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "winapi 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)",
 ]

 [[package]]
 name = "assert_cli"
-version = "0.5.4"
+version = "0.6.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "colored 1.6.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "difference 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "colored 1.9.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "difference 2.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
 "environment 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "error-chain 0.11.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde_json 1.0.13 (registry+https://github.com/rust-lang/crates.io-index)",
- "skeptic 0.13.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "failure 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "failure_derive 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde_json 1.0.44 (registry+https://github.com/rust-lang/crates.io-index)",
 ]

 [[package]]
 name = "atty"
-version = "0.2.8"
+version = "0.2.14"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "libc 0.2.39 (registry+https://github.com/rust-lang/crates.io-index)",
- "termion 1.5.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "winapi 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)",
+ "hermit-abi 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.66 (registry+https://github.com/rust-lang/crates.io-index)",
+ "winapi 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)",
 ]

+[[package]]
+name = "autocfg"
+version = "0.1.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
 [[package]]
 name = "backtrace"
-version = "0.3.5"
+version = "0.3.42"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
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--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,8 +1,9 @@
 [package]
 name = "du-dust"
 description = "A more intuitive version of du"
-version = "0.3.1"
+version = "0.4.4"
 authors = ["bootandy <bootandy@gmail.com>", "nebkor <code@ardent.nebcorp.com>"]
+edition = "2018"

 documentation = "https://github.com/bootandy/dust"
 homepage = "https://github.com/bootandy/dust"
@@ -20,9 +21,14 @@ name = "dust"
 path = "src/main.rs"

 [dependencies]
-ansi_term = "0.11"
-clap = "2.31"
-assert_cli = "0.5"
-tempfile = "3"
-walkdir = "2"
+ansi_term = "=0.12"
+clap = "=2.33"
+jwalk = "0.4.0"
+num_cpus = "1.12"

+[target.'cfg(windows)'.dependencies]
+winapi-util = "0.1"
+
+[dev-dependencies]
+assert_cli = "=0.6"
+tempfile = "=3"
--- a/README.md
+++ b/README.md
@@ -32,12 +32,16 @@ Dust assumes that’s what you wanted to do in the first place, and takes care o
 ## Usage

 ```
+Usage: dust
 Usage: dust <dir>
 Usage: dust <dir>  <another_dir> <and_more>
 Usage: dust -p <dir>  (full-path - does not shorten the path of the subdirectories)
 Usage: dust -s <dir>  (apparent-size - shows the length of the file as opposed to the amount of disk space it uses)
 Usage: dust -n 30  <dir>  (Shows 30 directories not 20)
 Usage: dust -d 3  <dir>  (Shows 3 levels of subdirectories)
+Usage: dust -r  <dir>  (Reverse order of output, with root at the lowest)
+Usage: dust -x  <dir>  (Only show directories on same filesystem)
+Usage: dust -X ignore  <dir>  (Ignore all files and directories containing the string 'ignore')
 ```

 ```
@@ -60,13 +64,11 @@ djin:git/dust> dust
 124M   └── deps
 ```

-## Performance
-
-Dust is currently about 4 times slower than du.

 ## Alternatives

 * [NCDU](https://dev.yorhel.nl/ncdu)
+* [dutree](https://github.com/nachoparker/dutree)
 * du -d 1 -h | sort -h

 Note: Apparent-size is calculated slightly differently in dust to gdu. In dust each hard link is counted as using file_length space. In gdu only the first entry is counted.
--- a/ci/before_deploy.sh
+++ b/ci/before_deploy.sh
@@ -1,3 +1,4 @@
+#!/usr/bin/env bash
 # This script takes care of building your crate and packaging it for release

 set -ex
--- a/ci/install.sh
+++ b/ci/install.sh
@@ -1,3 +1,4 @@
+#!/usr/bin/env bash
 set -ex

 main() {
--- a/ci/script.sh
+++ b/ci/script.sh
@@ -1,3 +1,4 @@
+#!/usr/bin/env bash
 # This script takes care of testing your crate

 set -ex
--- a/src/display.rs
+++ b/src/display.rs
@@ -1,176 +1,178 @@
 extern crate ansi_term;

 use self::ansi_term::Colour::Fixed;
-use std::collections::HashSet;
+use self::ansi_term::Style;
+use crate::utils::Node;

 static UNITS: [char; 4] = ['T', 'G', 'M', 'K'];

-pub fn draw_it(
-    permissions: bool,
-    short_paths: bool,
-    depth: Option<u64>,
-    base_dirs: HashSet<String>,
-    to_display: Vec<(String, u64)>,
-) -> () {
-    if !permissions {
-        eprintln!("Did not have permissions for all directories");
-    }
-    let mut found = HashSet::new();
-
-    for &(ref k, _) in to_display.iter() {
-        if base_dirs.contains(k) {
-            display_node(&k, &mut found, &to_display, true, short_paths, depth, "─┬")
-        }
-    }
+pub struct DisplayData {
+    pub short_paths: bool,
+    pub is_reversed: bool,
+    pub colors_on: bool,
 }

-fn get_size(nodes: &Vec<(String, u64)>, node_to_print: &String) -> Option<u64> {
-    for &(ref k, ref v) in nodes.iter() {
-        if *k == *node_to_print {
-            return Some(*v);
+impl DisplayData {
+    fn get_first_chars(&self) -> &str {
+        if self.is_reversed {
+            "─┴"
+        } else {
+            "─┬"
        }
    }
-    None
-}

-fn display_node<S: Into<String>>(
-    node_to_print: &String,
-    found: &mut HashSet<String>,
-    to_display: &Vec<(String, u64)>,
-    is_biggest: bool,
-    short_paths: bool,
-    depth: Option<u64>,
-    indentation_str: S,
-) {
-    if found.contains(node_to_print) {
-        return;
-    }
-    found.insert(node_to_print.to_string());
-
-    let new_depth = match depth {
-        None => None,
-        Some(0) => return,
-        Some(d) => Some(d - 1),
-    };
-    match get_size(to_display, node_to_print) {
-        None => println!("Can not find path: {}", node_to_print),
-        Some(size) => {
-            let is = indentation_str.into();
-            let ntp: &str = node_to_print.as_ref();
-
-            print_this_node(ntp, size, is_biggest, short_paths, is.as_ref());
-            let new_indent_str = clean_indentation_string(is);
-
-            let num_slashes = node_to_print.matches('/').count();
-            let mut num_siblings = count_siblings(to_display, num_slashes, ntp);
-
-            let mut is_biggest = true;
-            for &(ref k, _) in to_display.iter() {
-                if k.starts_with(ntp) && k.matches('/').count() == num_slashes + 1 {
-                    num_siblings -= 1;
-
-                    let mut has_children = false;
-                    if new_depth.is_none() || new_depth.unwrap() != 1 {
-                        for &(ref k2, _) in to_display.iter() {
-                            let kk: &str = k.as_ref();
-                            if k2.starts_with(kk) && k2.matches('/').count() == num_slashes + 2 {
-                                has_children = true;
-                            }
-                        }
-                    }
-
-                    display_node(
-                        k,
-                        found,
-                        to_display,
-                        is_biggest,
-                        short_paths,
-                        new_depth,
-                        new_indent_str.to_string() + get_tree_chars(num_siblings, has_children),
-                    );
-                    is_biggest = false;
+    #[allow(clippy::collapsible_if)]
+    fn get_tree_chars(
+        &self,
+        num_siblings: u64,
+        max_siblings: u64,
+        has_children: bool,
+    ) -> &'static str {
+        if self.is_reversed {
+            if num_siblings == max_siblings - 1 {
+                if has_children {
+                    "┌─┴"
+                } else {
+                    "┌──"
                }
+            } else if has_children {
+                "├─┴"
+            } else {
+                "├──"
+            }
+        } else {
+            if num_siblings == 0 {
+                if has_children {
+                    "└─┬"
+                } else {
+                    "└──"
+                }
+            } else if has_children {
+                "├─┬"
+            } else {
+                "├──"
            }
        }
    }
-}

-fn clean_indentation_string<S: Into<String>>(s: S) -> String {
-    let mut is = s.into();
-    is = is.replace("└─┬", "  ");
-    is = is.replace("└──", "  ");
-    is = is.replace("├──", "│ ");
-    is = is.replace("├─┬", "│ ");
-    is = is.replace("─┬", " ");
-    is
-}
-
-fn count_siblings(to_display: &Vec<(String, u64)>, num_slashes: usize, ntp: &str) -> u64 {
-    to_display.iter().fold(0, |a, b| {
-        if b.0.starts_with(ntp) && b.0.matches('/').count() == num_slashes + 1 {
-            a + 1
+    fn is_biggest(&self, num_siblings: u64, max_siblings: u64) -> bool {
+        if self.is_reversed {
+            num_siblings == 0
        } else {
-            a
+            num_siblings == max_siblings - 1
        }
-    })
-}
+    }

-fn get_tree_chars(num_siblings: u64, has_children: bool) -> &'static str {
-    if num_siblings == 0 {
-        if has_children {
-            "└─┬"
+    fn get_children_from_node(&self, node: Node) -> impl Iterator<Item = Node> {
+        if self.is_reversed {
+            let n: Vec<Node> = node.children.into_iter().rev().map(|a| a).collect();
+            n.into_iter()
        } else {
-            "└──"
-        }
-    } else {
-        if has_children {
-            "├─┬"
-        } else {
-            "├──"
+            node.children.into_iter()
        }
    }
 }

+pub fn draw_it(
+    permissions: bool,
+    use_full_path: bool,
+    is_reversed: bool,
+    no_colors: bool,
+    root_node: Node,
+) {
+    if !permissions {
+        eprintln!("Did not have permissions for all directories");
+    }
+    let display_data = DisplayData {
+        short_paths: !use_full_path,
+        is_reversed,
+        colors_on: !no_colors,
+    };
+
+    for c in display_data.get_children_from_node(root_node) {
+        let first_tree_chars = display_data.get_first_chars();
+        display_node(c, true, first_tree_chars, &display_data)
+    }
+}
+
+fn display_node(node: Node, is_biggest: bool, indent: &str, display_data: &DisplayData) {
+    let mut num_siblings = node.children.len() as u64;
+    let max_sibling = num_siblings;
+    let new_indent = clean_indentation_string(indent);
+    let name = node.name.clone();
+    let size = node.size;
+
+    if !display_data.is_reversed {
+        print_this_node(&*name, size, is_biggest, display_data, indent);
+    }
+
+    for c in display_data.get_children_from_node(node) {
+        num_siblings -= 1;
+        let chars = display_data.get_tree_chars(num_siblings, max_sibling, !c.children.is_empty());
+        let is_biggest = display_data.is_biggest(num_siblings, max_sibling);
+        let full_indent = new_indent.clone() + chars;
+        display_node(c, is_biggest, &*full_indent, display_data)
+    }
+
+    if display_data.is_reversed {
+        print_this_node(&*name, size, is_biggest, display_data, indent);
+    }
+}
+
+fn clean_indentation_string(s: &str) -> String {
+    let mut is: String = s.into();
+    // For reversed:
+    is = is.replace("┌─┴", "  ");
+    is = is.replace("┌──", "  ");
+    is = is.replace("├─┴", "│ ");
+    is = is.replace("─┴", " ");
+    // For normal
+    is = is.replace("└─┬", "  ");
+    is = is.replace("└──", "  ");
+    is = is.replace("├─┬", "│ ");
+    is = is.replace("─┬", " ");
+    // For both
+    is = is.replace("├──", "│ ");
+    is
+}
+
 fn print_this_node(
-    node_name: &str,
+    name: &str,
    size: u64,
    is_biggest: bool,
-    short_paths: bool,
+    display_data: &DisplayData,
    indentation: &str,
 ) {
    let pretty_size = format!("{:>5}", human_readable_number(size),);
    println!(
        "{}",
-        format_string(
-            node_name,
-            is_biggest,
-            short_paths,
-            pretty_size.as_ref(),
-            indentation
-        )
+        format_string(name, is_biggest, display_data, &*pretty_size, indentation)
    )
 }

 pub fn format_string(
    dir_name: &str,
    is_biggest: bool,
-    short_paths: bool,
+    display_data: &DisplayData,
    size: &str,
    indentation: &str,
 ) -> String {
    let printable_name = {
-        if short_paths {
-            dir_name.split('/').last().unwrap_or(dir_name)
+        if display_data.short_paths {
+            dir_name
+                .split(std::path::is_separator)
+                .last()
+                .unwrap_or(dir_name)
        } else {
            dir_name
        }
    };
    format!(
        "{} {} {}",
-        if is_biggest {
+        if is_biggest && display_data.colors_on {
            Fixed(196).paint(size)
        } else {
-            Fixed(7).paint(size)
+            Style::new().paint(size)
        },
        indentation,
        printable_name,
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,20 +1,30 @@
 #[macro_use]
 extern crate clap;
-extern crate assert_cli;
-extern crate walkdir;

 use self::display::draw_it;
+use crate::utils::is_a_parent_of;
 use clap::{App, AppSettings, Arg};
-use utils::{find_big_ones, get_dir_tree, simplify_dir_names, sort};
+use utils::{find_big_ones, get_dir_tree, simplify_dir_names, sort, trim_deep_ones, Node};

 mod display;
 mod utils;

 static DEFAULT_NUMBER_OF_LINES: usize = 20;

+#[cfg(windows)]
+fn init_color() {
+    ansi_term::enable_ansi_support().expect("Couldn't enable color support");
+}
+
+#[cfg(not(windows))]
+fn init_color() {}
+
 fn main() {
+    init_color();
    let def_num_str = DEFAULT_NUMBER_OF_LINES.to_string();
    let options = App::new("Dust")
+        .about("Like du but more intuitive")
+        .version(crate_version!())
        .setting(AppSettings::TrailingVarArg)
        .arg(
            Arg::with_name("depth")
@@ -23,6 +33,13 @@ fn main() {
                .help("Depth to show")
                .takes_value(true),
        )
+        .arg(
+            Arg::with_name("threads")
+                .short("t")
+                .long("threads")
+                .help("Number of threads to spawn simultaneously")
+                .takes_value(true),
+        )
        .arg(
            Arg::with_name("number_of_lines")
                .short("n")
@@ -37,12 +54,39 @@ fn main() {
                .long("full-paths")
                .help("If set sub directories will not have their path shortened"),
        )
+        .arg(
+            Arg::with_name("ignore_directory")
+                .short("X")
+                .long("ignore-directory")
+                .takes_value(true)
+                .number_of_values(1)
+                .multiple(true)
+                .help("Exclude any file or directory with contains this substring."),
+        )
+        .arg(
+            Arg::with_name("limit_filesystem")
+                .short("x")
+                .long("limit-filesystem")
+                .help("Only count the files and directories in the same filesystem as the supplied directory"),
+        )
        .arg(
            Arg::with_name("display_apparent_size")
                .short("s")
                .long("apparent-size")
                .help("If set will use file length. Otherwise we use blocks"),
        )
+        .arg(
+            Arg::with_name("reverse")
+                .short("r")
+                .long("reverse")
+                .help("If applied tree will be printed upside down (biggest lowest)"),
+        )
+        .arg(
+            Arg::with_name("no_colors")
+                .short("c")
+                .long("no_colors")
+                .help("If applied no colors will be printed (normally largest directories are marked in red"),
+        )
        .arg(Arg::with_name("inputs").multiple(true))
        .get_matches();

@@ -61,45 +105,97 @@ fn main() {
        }
    };

-    let depth = {
-        if options.is_present("depth") {
-            match value_t!(options.value_of("depth"), u64) {
-                Ok(v) => Some(v + 1),
-                Err(_) => {
-                    eprintln!("Ignoring bad value for depth");
-                    None
-                }
-            }
+    let temp_threads = options.value_of("threads").and_then(|threads| {
+        threads
+            .parse::<usize>()
+            .map_err(|_| eprintln!("Ignoring bad value for threads: {:?}", threads))
+            .ok()
+    });
+    // Bug in JWalk
+    // https://github.com/jessegrosjean/jwalk/issues/15
+    // We force it to use 2 threads if there is only 1 cpu
+    // as JWalk breaks if it tries to run on a single cpu
+    let threads = {
+        if temp_threads.is_none() && num_cpus::get() == 1 {
+            Some(2)
        } else {
-            None
+            temp_threads
        }
    };
+
+    let depth = options.value_of("depth").and_then(|depth| {
+        depth
+            .parse::<u64>()
+            .map(|v| v + 1)
+            .map_err(|_| eprintln!("Ignoring bad value for depth"))
+            .ok()
+    });
    if options.is_present("depth") && number_of_lines != DEFAULT_NUMBER_OF_LINES {
        eprintln!("Use either -n or -d. Not both");
        return;
    }

    let use_apparent_size = options.is_present("display_apparent_size");
-    let use_full_path = options.is_present("display_full_paths");
+    let limit_filesystem = options.is_present("limit_filesystem");
+    let ignore_directories = options.values_of("ignore_directory").map(|r| r.collect());

    let simplified_dirs = simplify_dir_names(target_dirs);
-    let (permissions, nodes, top_level_names) = get_dir_tree(simplified_dirs, use_apparent_size);
+    let (permissions, nodes) = get_dir_tree(
+        &simplified_dirs,
+        ignore_directories,
+        use_apparent_size,
+        limit_filesystem,
+        threads,
+    );
    let sorted_data = sort(nodes);
    let biggest_ones = {
-        if depth.is_none() {
-            find_big_ones(sorted_data, number_of_lines)
-        } else {
-            sorted_data
+        match depth {
+            None => find_big_ones(sorted_data, number_of_lines + simplified_dirs.len()),
+            Some(d) => trim_deep_ones(sorted_data, d, &simplified_dirs),
        }
    };
+    let tree = build_tree(biggest_ones, depth);
+
    draw_it(
        permissions,
-        !use_full_path,
-        depth,
-        top_level_names,
-        biggest_ones,
+        options.is_present("display_full_paths"),
+        options.is_present("reverse"),
+        options.is_present("no_colors"),
+        tree,
    );
 }

+fn build_tree(biggest_ones: Vec<(String, u64)>, depth: Option<u64>) -> Node {
+    let mut top_parent = Node::default();
+
+    // assume sorted order
+    for b in biggest_ones {
+        let n = Node {
+            name: b.0,
+            size: b.1,
+            children: Vec::default(),
+        };
+        recursively_build_tree(&mut top_parent, n, depth);
+    }
+    top_parent
+}
+
+fn recursively_build_tree(parent_node: &mut Node, new_node: Node, depth: Option<u64>) {
+    let new_depth = match depth {
+        None => None,
+        Some(0) => return,
+        Some(d) => Some(d - 1),
+    };
+    if let Some(c) = parent_node
+        .children
+        .iter_mut()
+        .find(|c| is_a_parent_of(&c.name, &new_node.name))
+    {
+        recursively_build_tree(c, new_node, new_depth);
+    } else {
+        parent_node.children.push(new_node);
+    }
+}
+
 #[cfg(test)]
 mod tests;
--- a/src/test_dir2/dir/hello
+++ b/src/test_dir2/dir/hello
@@ -0,0 +1 @@
+hello
--- a/src/test_dir2/dir_name_clash
+++ b/src/test_dir2/dir_name_clash
@@ -0,0 +1 @@
+hello
--- a/src/test_dir2/dir_substring/hello
+++ b/src/test_dir2/dir_substring/hello
@@ -0,0 +1 @@
+hello
--- a/src/tests.rs
+++ b/src/tests.rs
@@ -1,121 +1,217 @@
-extern crate ansi_term;
-extern crate tempfile;
-use self::tempfile::Builder;
-use self::tempfile::TempDir;
 use super::*;
+
+use crate::display::DisplayData;
 use display::format_string;
 use std::fs::File;
 use std::io::Write;
 use std::panic;
 use std::path::PathBuf;
 use std::process::Command;
+use tempfile::Builder;
+use tempfile::TempDir;

+// fix! [rivy; 2020-22-01] "windows" result data can vary by host (size seems to be variable by one byte); fix code vs test and re-enable
+#[cfg_attr(target_os = "windows", ignore)]
 #[test]
 pub fn test_main() {
    assert_cli::Assert::main_binary()
        .with_args(&["src/test_dir"])
        .stdout()
-        .is(main_output(true))
+        .is(main_output(true).as_str())
        .unwrap();
 }

+// fix! [rivy; 2020-22-01] "windows" result data can vary by host (size seems to be variable by one byte); fix code vs test and re-enable
+#[cfg_attr(target_os = "windows", ignore)]
 #[test]
 pub fn test_main_long_paths() {
    assert_cli::Assert::main_binary()
        .with_args(&["-p", "src/test_dir"])
        .stdout()
-        .is(main_output(false))
+        .is(main_output(false).as_str())
        .unwrap();
 }

+// fix! [rivy; 2020-22-01] "windows" result data can vary by host (size seems to be variable by one byte); fix code vs test and re-enable
+#[cfg_attr(target_os = "windows", ignore)]
 #[test]
 pub fn test_main_multi_arg() {
    assert_cli::Assert::main_binary()
        .with_args(&["src/test_dir/many/", "src/test_dir/", "src/test_dir"])
        .stdout()
-        .is(main_output(true))
+        .is(main_output(true).as_str())
        .unwrap();
 }

 #[cfg(target_os = "macos")]
 fn main_output(short_paths: bool) -> String {
+    let d = DisplayData {
+        short_paths,
+        is_reversed: false,
+        colors_on: true,
+    };
    format!(
        "{}
 {}
 {}
 {}",
-        format_string("src/test_dir", true, short_paths, " 4.0K", "─┬"),
-        format_string("src/test_dir/many", true, short_paths, " 4.0K", " └─┬",),
-        format_string(
-            "src/test_dir/many/hello_file",
-            true,
-            short_paths,
-            " 4.0K",
-            "   ├──",
-        ),
-        format_string(
-            "src/test_dir/many/a_file",
-            false,
-            short_paths,
-            "   0B",
-            "   └──",
-        ),
+        format_string("src/test_dir", true, &d, " 4.0K", "─┬"),
+        format_string("src/test_dir/many", true, &d, " 4.0K", " └─┬",),
+        format_string("src/test_dir/many/hello_file", true, &d, " 4.0K", "   ├──",),
+        format_string("src/test_dir/many/a_file", false, &d, "   0B", "   └──",),
    )
 }

 #[cfg(target_os = "linux")]
 fn main_output(short_paths: bool) -> String {
+    let d = DisplayData {
+        short_paths,
+        is_reversed: false,
+        colors_on: true,
+    };
    format!(
        "{}
 {}
 {}
 {}",
-        format_string("src/test_dir", true, short_paths, "  12K", "─┬"),
-        format_string("src/test_dir/many", true, short_paths, " 8.0K", " └─┬",),
-        format_string(
-            "src/test_dir/many/hello_file",
-            true,
-            short_paths,
-            " 4.0K",
-            "   ├──",
-        ),
-        format_string(
-            "src/test_dir/many/a_file",
-            false,
-            short_paths,
-            "   0B",
-            "   └──",
-        ),
+        format_string("src/test_dir", true, &d, "  12K", "─┬"),
+        format_string("src/test_dir/many", true, &d, " 8.0K", " └─┬",),
+        format_string("src/test_dir/many/hello_file", true, &d, " 4.0K", "   ├──",),
+        format_string("src/test_dir/many/a_file", false, &d, "   0B", "   └──",),
    )
 }

-#[test]
-pub fn test_apparent_size() {
-    let r = format!(
-        "{}",
+#[cfg(target_os = "windows")]
+fn main_output(short_paths: bool) -> String {
+    let d = DisplayData {
+        short_paths,
+        is_reversed: false,
+        colors_on: true,
+    };
+    format!(
+        "{}
+{}
+{}
+{}",
+        format_string("src/test_dir", true, &d, "   6B", "─┬"),
+        format_string("src/test_dir\\many", true, &d, "   6B", " └─┬",),
        format_string(
-            "src/test_dir/many/hello_file",
-            true,
+            "src/test_dir\\many\\hello_file",
            true,
+            &d,
            "   6B",
            "   ├──",
        ),
+        format_string("src/test_dir\\many\\a_file", false, &d, "   0B", "   └──",),
+    )
+}
+
+// fix! [rivy; 2020-22-01] "windows" result data can vary by host (size seems to be variable by one byte); fix code vs test and re-enable
+#[cfg_attr(target_os = "windows", ignore)]
+#[test]
+pub fn test_no_color_flag() {
+    assert_cli::Assert::main_binary()
+        .with_args(&["-c", "src/test_dir/"])
+        .stdout()
+        .is(no_color_flag_output().as_str())
+        .unwrap();
+}
+
+#[cfg(target_os = "macos")]
+fn no_color_flag_output() -> String {
+    "
+ 4.0K ─┬ test_dir
+ 4.0K  └─┬ many
+ 4.0K    ├── hello_file
+   0B    └── a_file
+    "
+    .to_string()
+}
+
+#[cfg(target_os = "linux")]
+fn no_color_flag_output() -> String {
+    "
+  12K ─┬ test_dir
+ 8.0K  └─┬ many
+ 4.0K    ├── hello_file
+   0B    └── a_file
+    "
+    .to_string()
+}
+
+#[cfg(target_os = "windows")]
+fn no_color_flag_output() -> String {
+    "
+   6B ─┬ test_dir
+   6B  └─┬ many
+   6B    ├── hello_file
+   0B    └── a_file
+    "
+    .to_string()
+}
+
+// fix! [rivy; 2020-22-01] "windows" result data can vary by host (size seems to be variable by one byte); fix code vs test and re-enable
+#[cfg_attr(target_os = "windows", ignore)]
+#[test]
+pub fn test_apparent_size() {
+    let d = DisplayData {
+        short_paths: true,
+        is_reversed: false,
+        colors_on: true,
+    };
+    let r = format!(
+        "{}",
+        format_string("src/test_dir/many/hello_file", true, &d, "   6B", "   ├──",),
    );

    assert_cli::Assert::main_binary()
        .with_args(&["-s", "src/test_dir"])
        .stdout()
-        .contains(r)
+        .contains(r.as_str())
        .unwrap();
 }

-fn build_temp_file(dir: &TempDir) -> (PathBuf) {
+#[test]
+pub fn test_reverse_flag() {
+    // variable names the same length make the output easier to read
+    let a = "    ┌── a_file";
+    let b = "    ├── hello_file";
+    let c = "  ┌─┴ many";
+    let d = " ─┴ test_dir";
+
+    assert_cli::Assert::main_binary()
+        .with_args(&["-r", "src/test_dir"])
+        .stdout()
+        .contains(a)
+        .stdout()
+        .contains(b)
+        .stdout()
+        .contains(c)
+        .stdout()
+        .contains(d)
+        .unwrap();
+}
+
+#[test]
+pub fn test_d_flag_works() {
+    // We should see the top level directory but not the sub dirs / files:
+    assert_cli::Assert::main_binary()
+        .with_args(&["-d", "1", "-s", "src/test_dir"])
+        .stdout()
+        .doesnt_contain("hello_file")
+        .unwrap();
+}
+
+fn build_temp_file(dir: &TempDir) -> PathBuf {
    let file_path = dir.path().join("notes.txt");
    let mut file = File::create(&file_path).unwrap();
    writeln!(file, "I am a temp file").unwrap();
    file_path
 }

+// fix! [rivy; 2020-01-22] possible on "windows"?; `ln` is not usually an available command; creation of symbolic links requires special enhanced permissions
+//  ... ref: <https://superuser.com/questions/343074/directory-junction-vs-directory-symbolic-link> @@ <https://archive.is/gpTLE>
+#[cfg_attr(target_os = "windows", ignore)]
 #[test]
 pub fn test_soft_sym_link() {
    let dir = Builder::new().tempdir().unwrap();
@@ -132,42 +228,23 @@ pub fn test_soft_sym_link() {
        .output();
    assert!(c.is_ok());

-    let r = soft_sym_link_output(dir_s, file_path_s, link_name_s);
+    let a = format!(" ─┬ {}", dir_s);
+    let b = format!("  ├── {}", file_path_s);
+    let c = format!("  └── {}", link_name_s);

-    // We cannot guarantee which version will appear first.
-    // TODO: Consider adding predictable itteration order (sort file entries by name?)
    assert_cli::Assert::main_binary()
-        .with_args(&[dir_s])
+        .with_args(&["-p", &dir_s])
        .stdout()
-        .contains(r)
+        .contains(a.as_str())
+        .stdout()
+        .contains(b.as_str())
+        .stdout()
+        .contains(c.as_str())
        .unwrap();
 }

-#[cfg(target_os = "macos")]
-fn soft_sym_link_output(dir: &str, file_path: &str, link_name: &str) -> String {
-    format!(
-        "{}
-{}
-{}",
-        format_string(dir, true, true, " 8.0K", "─┬"),
-        format_string(file_path, true, true, " 4.0K", " ├──",),
-        format_string(link_name, false, true, " 4.0K", " └──",),
-    )
-}
-
-#[cfg(target_os = "linux")]
-fn soft_sym_link_output(dir: &str, file_path: &str, link_name: &str) -> String {
-    format!(
-        "{}
-{}
-{}",
-        format_string(dir, true, true, " 8.0K", "─┬"),
-        format_string(file_path, true, true, " 4.0K", " ├──",),
-        format_string(link_name, false, true, "   0B", " └──",),
-    )
-}
-
 // Hard links are ignored as the inode is the same as the file
+// fix! [rivy; 2020-01-22] may fail on "usual" windows hosts as `ln` is not usually an available command
 #[test]
 pub fn test_hard_sym_link() {
    let dir = Builder::new().tempdir().unwrap();
@@ -183,62 +260,36 @@ pub fn test_hard_sym_link() {
        .output();
    assert!(c.is_ok());

-    let (r, r2) = hard_link_output(dir_s, file_path_s, link_name_s);
+    let a = format!(" ─┬ {}", dir_s);
+    let b = format!("  └── {}", link_name_s);
+    let b2 = format!("  └── {}", file_path_s);

-    // Because this is a hard link the file and hard link look identicle. Therefore
+    // Because this is a hard link the file and hard link look identical. Therefore
    // we cannot guarantee which version will appear first.
-    // TODO: Consider adding predictable itteration order (sort file entries by name?)
    let result = panic::catch_unwind(|| {
        assert_cli::Assert::main_binary()
-            .with_args(&[dir_s])
+            .with_args(&["-p", dir_s])
            .stdout()
-            .contains(r)
+            .contains(a.as_str())
+            .stdout()
+            .contains(b.as_str())
            .unwrap();
    });
    if result.is_err() {
        assert_cli::Assert::main_binary()
-            .with_args(&[dir_s])
+            .with_args(&["-p", dir_s])
            .stdout()
-            .contains(r2)
+            .contains(a.as_str())
+            .stdout()
+            .contains(b2.as_str())
            .unwrap();
    }
 }

-#[cfg(target_os = "macos")]
-fn hard_link_output(dir_s: &str, file_path_s: &str, link_name_s: &str) -> (String, String) {
-    let r = format!(
-        "{}
-{}",
-        format_string(dir_s, true, true, " 4.0K", "─┬"),
-        format_string(file_path_s, true, true, " 4.0K", " └──")
-    );
-    let r2 = format!(
-        "{}
-{}",
-        format_string(dir_s, true, true, " 4.0K", "─┬"),
-        format_string(link_name_s, true, true, " 4.0K", " └──")
-    );
-    (r, r2)
-}
-
-#[cfg(target_os = "linux")]
-fn hard_link_output(dir_s: &str, file_path_s: &str, link_name_s: &str) -> (String, String) {
-    let r = format!(
-        "{}
-{}",
-        format_string(dir_s, true, true, " 8.0K", "─┬"),
-        format_string(file_path_s, true, true, " 4.0K", " └──")
-    );
-    let r2 = format!(
-        "{}
-{}",
-        format_string(dir_s, true, true, " 8.0K", "─┬"),
-        format_string(link_name_s, true, true, " 4.0K", " └──")
-    );
-    (r, r2)
-}
-
-//Check we don't recurse down an infinite symlink tree
+// Check we don't recurse down an infinite symlink tree
+// fix! [rivy; 2020-01-22] possible on "windows"?; `ln` is not usually an available command; creation of symbolic links requires special enhanced permissions
+//  ... ref: <https://superuser.com/questions/343074/directory-junction-vs-directory-symbolic-link> @@ <https://archive.is/gpTLE>
+#[cfg_attr(target_os = "windows", ignore)]
 #[test]
 pub fn test_recursive_sym_link() {
    let dir = Builder::new().tempdir().unwrap();
@@ -254,29 +305,108 @@ pub fn test_recursive_sym_link() {
        .output();
    assert!(c.is_ok());

+    let a = format!(" ─┬ {}", dir_s);
+    let b = format!("  └── {}", link_name_s);
+
    assert_cli::Assert::main_binary()
-        .with_args(&[dir_s])
+        .with_args(&["-p", dir_s])
        .stdout()
-        .contains(recursive_sym_link_output(dir_s, link_name_s))
+        .contains(a.as_str())
+        .stdout()
+        .contains(b.as_str())
        .unwrap();
 }

-#[cfg(target_os = "macos")]
-fn recursive_sym_link_output(dir: &str, link_name: &str) -> String {
-    format!(
-        "{}
-{}",
-        format_string(dir, true, true, " 4.0K", "─┬"),
-        format_string(link_name, true, true, " 4.0K", " └──",),
-    )
-}
-#[cfg(target_os = "linux")]
-fn recursive_sym_link_output(dir: &str, link_name: &str) -> String {
-    format!(
-        "{}
-{}",
-        format_string(dir, true, true, " 4.0K", "─┬"),
-        format_string(link_name, true, true, "   0B", " └──",),
-    )
+// Check against directories and files whos names are substrings of each other
+// fix! [rivy; 2020-22-01] "windows" result data can vary by host (size seems to be variable by one byte); fix code vs test and re-enable
+#[cfg_attr(target_os = "windows", ignore)]
+#[test]
+pub fn test_substring_of_names() {
+    assert_cli::Assert::main_binary()
+        .with_args(&["-c", "src/test_dir2"])
+        .stdout()
+        .is(no_substring_of_names_output().as_str())
+        .unwrap();
 }

+#[cfg(target_os = "linux")]
+fn no_substring_of_names_output() -> String {
+    "
+  24K ─┬ test_dir2
+ 8.0K  ├─┬ dir
+ 4.0K  │ └── hello
+ 8.0K  ├─┬ dir_substring
+ 4.0K  │ └── hello
+ 4.0K  └── dir_name_clash
+    "
+    .into()
+}
+
+#[cfg(target_os = "macos")]
+fn no_substring_of_names_output() -> String {
+    "
+  12K ─┬ test_dir2
+ 4.0K  ├─┬ dir
+ 4.0K  │ └── hello
+ 4.0K  ├── dir_name_clash
+ 4.0K  └─┬ dir_substring
+ 4.0K    └── hello
+    "
+    .into()
+}
+
+#[cfg(target_os = "windows")]
+fn no_substring_of_names_output() -> String {
+    "
+  16B ─┬ test_dir2
+   6B  ├─┬ dir_substring
+   6B  │ └── hello
+   5B  ├─┬ dir
+   5B  │ └── hello
+   5B  └── dir_name_clash
+    "
+    .into()
+}
+
+// Check against directories and files whos names are substrings of each other
+#[test]
+pub fn test_ignore_dir() {
+    assert_cli::Assert::main_binary()
+        .with_args(&["-c", "-X", "dir_substring", "src/test_dir2"])
+        .stdout()
+        .is(ignore_dir_output().as_str())
+        .unwrap();
+}
+
+#[cfg(target_os = "linux")]
+fn ignore_dir_output() -> String {
+    "
+  16K ─┬ test_dir2
+ 8.0K  ├─┬ dir
+ 4.0K  │ └── hello
+ 4.0K  └── dir_name_clash
+    "
+    .into()
+}
+
+#[cfg(target_os = "macos")]
+fn ignore_dir_output() -> String {
+    "
+ 8.0K ─┬ test_dir2
+ 4.0K  ├─┬ dir
+ 4.0K  │ └── hello
+ 4.0K  └── dir_name_clash
+    "
+    .into()
+}
+
+#[cfg(target_os = "windows")]
+fn ignore_dir_output() -> String {
+    "
+  10B ─┬ test_dir2
+   5B  ├─┬ dir
+   5B  │ └── hello
+   5B  └── dir_name_clash
+    "
+    .into()
+}
--- a/src/utils/mod.rs
+++ b/src/utils/mod.rs
@@ -1,33 +1,68 @@
+use jwalk::DirEntry;
 use std::cmp::Ordering;
 use std::collections::HashMap;
 use std::collections::HashSet;

-use walkdir::WalkDir;
+use jwalk::WalkDir;

 mod platform;
 use self::platform::*;

+#[derive(Debug, Default, Eq)]
+pub struct Node {
+    pub name: String,
+    pub size: u64,
+    pub children: Vec<Node>,
+}
+
+impl Ord for Node {
+    fn cmp(&self, other: &Self) -> Ordering {
+        if self.size == other.size {
+            self.name.cmp(&other.name)
+        } else {
+            self.size.cmp(&other.size)
+        }
+    }
+}
+
+impl PartialOrd for Node {
+    fn partial_cmp(&self, other: &Self) -> Option<Ordering> {
+        Some(self.cmp(other))
+    }
+}
+
+impl PartialEq for Node {
+    fn eq(&self, other: &Self) -> bool {
+        self.name == other.name && self.size == other.size && self.children == other.children
+    }
+}
+
+pub fn is_a_parent_of(parent: &str, child: &str) -> bool {
+    let path_parent = std::path::Path::new(parent);
+    let path_child = std::path::Path::new(child);
+    (path_child.starts_with(path_parent) && !path_parent.starts_with(path_child))
+}
+
 pub fn simplify_dir_names(filenames: Vec<&str>) -> HashSet<String> {
-    let mut top_level_names: HashSet<String> = HashSet::new();
+    let mut top_level_names: HashSet<String> = HashSet::with_capacity(filenames.len());
+    let mut to_remove: Vec<String> = Vec::with_capacity(filenames.len());

    for t in filenames {
-        let top_level_name = strip_end_slashes(t);
+        let top_level_name = normalize_path(t);
        let mut can_add = true;
-        let mut to_remove: Vec<String> = Vec::new();

        for tt in top_level_names.iter() {
-            let temp = tt.to_string();
-            if top_level_name.starts_with(&temp) {
+            if is_a_parent_of(&top_level_name, tt) {
+                to_remove.push(tt.to_string());
+            } else if is_a_parent_of(tt, &top_level_name) {
                can_add = false;
-            } else if tt.starts_with(&top_level_name) {
-                to_remove.push(temp);
            }
        }
-        for tr in to_remove {
-            top_level_names.remove(&tr);
-        }
+        to_remove.sort_unstable();
+        top_level_names.retain(|tr| to_remove.binary_search(tr).is_err());
+        to_remove.clear();
        if can_add {
-            top_level_names.insert(top_level_name);
+            top_level_names.insert(normalize_path(t).to_owned());
        }
    }

@@ -35,68 +70,149 @@ pub fn simplify_dir_names(filenames: Vec<&str>) -> HashSet<String> {
 }

 pub fn get_dir_tree(
-    top_level_names: HashSet<String>,
+    top_level_names: &HashSet<String>,
+    ignore_directories: Option<Vec<&str>>,
    apparent_size: bool,
-) -> (bool, HashMap<String, u64>, HashSet<String>) {
+    limit_filesystem: bool,
+    threads: Option<usize>,
+) -> (bool, HashMap<String, u64>) {
    let mut permissions = 0;
-    let mut inodes: HashSet<(u64, u64)> = HashSet::new();
    let mut data: HashMap<String, u64> = HashMap::new();
+    let restricted_filesystems = if limit_filesystem {
+        get_allowed_filesystems(top_level_names)
+    } else {
+        None
+    };

    for b in top_level_names.iter() {
-        examine_dir(&b, apparent_size, &mut inodes, &mut data, &mut permissions);
+        examine_dir(
+            &b,
+            apparent_size,
+            &restricted_filesystems,
+            &ignore_directories,
+            &mut data,
+            &mut permissions,
+            threads,
+        );
    }
-    (permissions == 0, data, top_level_names)
+    (permissions == 0, data)
 }

-fn strip_end_slashes(s: &str) -> String {
-    let mut new_name = String::from(s);
-    while new_name.chars().last() == Some('/') && new_name.len() != 1 {
-        new_name.pop();
+fn get_allowed_filesystems(top_level_names: &HashSet<String>) -> Option<HashSet<u64>> {
+    let mut limit_filesystems: HashSet<u64> = HashSet::new();
+    for file_name in top_level_names.iter() {
+        if let Ok(a) = get_filesystem(file_name) {
+            limit_filesystems.insert(a);
+        }
    }
-    new_name
+    Some(limit_filesystems)
+}
+
+pub fn normalize_path<P: AsRef<std::path::Path>>(path: P) -> std::string::String {
+    // normalize path ...
+    // 1. removing repeated separators
+    // 2. removing interior '.' ("current directory") path segments
+    // 3. removing trailing extra separators and '.' ("current directory") path segments
+    // * `Path.components()` does all the above work; ref: <https://doc.rust-lang.org/std/path/struct.Path.html#method.components>
+    // 4. changing to os preferred separator (automatically done by recollecting components back into a PathBuf)
+    path.as_ref()
+        .components()
+        .collect::<std::path::PathBuf>()
+        .to_string_lossy()
+        .to_string()
 }

 fn examine_dir(
-    top_dir: &String,
+    top_dir: &str,
    apparent_size: bool,
-    inodes: &mut HashSet<(u64, u64)>,
+    filesystems: &Option<HashSet<u64>>,
+    ignore_directories: &Option<Vec<&str>>,
    data: &mut HashMap<String, u64>,
-    permissions: &mut u64,
+    file_count_no_permission: &mut u64,
+    threads: Option<usize>,
 ) {
-    for entry in WalkDir::new(top_dir) {
-        match entry {
-            Ok(e) => {
-                let maybe_size_and_inode = get_metadata(&e, apparent_size);
-
-                match maybe_size_and_inode {
-                    Some((size, maybe_inode)) => {
-                        if !apparent_size {
-                            if let Some(inode_dev_pair) = maybe_inode {
-                                if inodes.contains(&inode_dev_pair) {
-                                    continue;
-                                }
-                                inodes.insert(inode_dev_pair);
-                            }
-                        }
-                        let mut e_path = e.path().to_path_buf();
-                        loop {
-                            let path_name = e_path.to_string_lossy().to_string();
-                            let s = data.entry(path_name.clone()).or_insert(0);
-                            *s += size;
-                            if path_name == *top_dir {
-                                break;
-                            }
-                            e_path.pop();
-                        }
+    let mut inodes: HashSet<(u64, u64)> = HashSet::new();
+    let mut iter = WalkDir::new(top_dir)
+        .preload_metadata(true)
+        .skip_hidden(false);
+    if let Some(threads_to_start) = threads {
+        iter = iter.num_threads(threads_to_start);
+    }
+    'entry: for entry in iter {
+        if let Ok(e) = entry {
+            let maybe_size_and_inode = get_metadata(&e, apparent_size);
+            if let Some(d) = ignore_directories {
+                for s in d {
+                    if e.path().to_string_lossy().contains(*s) {
+                        continue 'entry;
                    }
-                    None => *permissions += 1,
                }
            }
-            _ => {}
+
+            match maybe_size_and_inode {
+                Some((size, maybe_inode)) => {
+                    if !should_ignore_file(apparent_size, filesystems, &mut inodes, maybe_inode) {
+                        process_file_with_size_and_inode(top_dir, data, e, size)
+                    }
+                }
+                None => *file_count_no_permission += 1,
+            }
+        } else {
+            *file_count_no_permission += 1
        }
    }
 }
-pub fn compare_tuple(a: &(String, u64), b: &(String, u64)) -> Ordering {
+
+fn should_ignore_file(
+    apparent_size: bool,
+    restricted_filesystems: &Option<HashSet<u64>>,
+    inodes: &mut HashSet<(u64, u64)>,
+    maybe_inode: Option<(u64, u64)>,
+) -> bool {
+    if !apparent_size {
+        if let Some(inode_dev_pair) = maybe_inode {
+            // Ignore files on different devices (if flag applied)
+            if restricted_filesystems.is_some()
+                && !restricted_filesystems
+                    .as_ref()
+                    .unwrap()
+                    .contains(&inode_dev_pair.1)
+            {
+                return true;
+            }
+            // Ignore files already visited or symlinked
+            if inodes.contains(&inode_dev_pair) {
+                return true;
+            }
+            inodes.insert(inode_dev_pair);
+        }
+    }
+    false
+}
+
+fn process_file_with_size_and_inode(
+    top_dir: &str,
+    data: &mut HashMap<String, u64>,
+    e: DirEntry,
+    size: u64,
+) {
+    // This path and all its parent paths have their counter incremented
+    for path_name in e.path().ancestors() {
+        // This is required due to bug in Jwalk that adds '/' to all sub dir lists
+        // see: https://github.com/jessegrosjean/jwalk/issues/13
+        if path_name.to_string_lossy() == "/" && top_dir != "/" {
+            continue;
+        }
+        let path_name = path_name.to_string_lossy();
+        let s = data.entry(path_name.to_string()).or_insert(0);
+        *s += size;
+        if path_name == top_dir {
+            break;
+        }
+    }
+}
+
+pub fn sort_by_size_first_name_second(a: &(String, u64), b: &(String, u64)) -> Ordering {
    let result = b.1.cmp(&a.1);
    if result == Ordering::Equal {
        a.0.cmp(&b.0)
@@ -105,20 +221,41 @@ pub fn compare_tuple(a: &(String, u64), b: &(String, u64)) -> Ordering {
    }
 }

-pub fn sort<'a>(data: HashMap<String, u64>) -> Vec<(String, u64)> {
+pub fn sort(data: HashMap<String, u64>) -> Vec<(String, u64)> {
    let mut new_l: Vec<(String, u64)> = data.iter().map(|(a, b)| (a.clone(), *b)).collect();
-    new_l.sort_by(|a, b| compare_tuple(&a, &b));
+    new_l.sort_unstable_by(sort_by_size_first_name_second);
    new_l
 }

-pub fn find_big_ones<'a>(new_l: Vec<(String, u64)>, max_to_show: usize) -> Vec<(String, u64)> {
+pub fn find_big_ones(new_l: Vec<(String, u64)>, max_to_show: usize) -> Vec<(String, u64)> {
    if max_to_show > 0 && new_l.len() > max_to_show {
-        new_l[0..max_to_show + 1].to_vec()
+        new_l[0..max_to_show].to_vec()
    } else {
        new_l
    }
 }

+pub fn trim_deep_ones(
+    input: Vec<(String, u64)>,
+    max_depth: u64,
+    top_level_names: &HashSet<String>,
+) -> Vec<(String, u64)> {
+    let mut result: Vec<(String, u64)> = Vec::with_capacity(input.len() * top_level_names.len());
+
+    for name in top_level_names {
+        let my_max_depth = name.matches(std::path::is_separator).count() + max_depth as usize;
+        let name_ref: &str = name.as_ref();
+
+        for &(ref k, ref v) in input.iter() {
+            if k.starts_with(name_ref) && k.matches(std::path::is_separator).count() <= my_max_depth
+            {
+                result.push((k.clone(), *v));
+            }
+        }
+    }
+    result
+}
+
 mod tests {
    #[allow(unused_imports)]
    use super::*;
@@ -127,29 +264,100 @@ mod tests {
    fn test_simplify_dir() {
        let mut correct = HashSet::new();
        correct.insert("a".to_string());
-        assert!(simplify_dir_names(vec!["a"]) == correct);
+        assert_eq!(simplify_dir_names(vec!["a"]), correct);
    }

    #[test]
    fn test_simplify_dir_rm_subdir() {
        let mut correct = HashSet::new();
-        correct.insert("a/b".to_string());
-        assert!(simplify_dir_names(vec!["a/b", "a/b/c", "a/b/d/f"]) == correct);
+        correct.insert(
+            ["a", "b"]
+                .iter()
+                .collect::<std::path::PathBuf>()
+                .to_string_lossy()
+                .to_string(),
+        );
+        assert_eq!(simplify_dir_names(vec!["a/b", "a/b/c", "a/b/d/f"]), correct);
    }

    #[test]
    fn test_simplify_dir_duplicates() {
        let mut correct = HashSet::new();
-        correct.insert("a/b".to_string());
+        correct.insert(
+            ["a", "b"]
+                .iter()
+                .collect::<std::path::PathBuf>()
+                .to_string_lossy()
+                .to_string(),
+        );
        correct.insert("c".to_string());
-        assert!(simplify_dir_names(vec!["a/b", "a/b//", "c", "c/"]) == correct);
+        assert_eq!(
+            simplify_dir_names(vec![
+                "a/b",
+                "a/b//",
+                "a/././b///",
+                "c",
+                "c/",
+                "c/.",
+                "c/././",
+                "c/././."
+            ]),
+            correct
+        );
    }
    #[test]
    fn test_simplify_dir_rm_subdir_and_not_substrings() {
        let mut correct = HashSet::new();
-        correct.insert("a/b".to_string());
-        correct.insert("c/a/b".to_string());
        correct.insert("b".to_string());
-        assert!(simplify_dir_names(vec!["a/b", "c/a/b/", "b"]) == correct);
+        correct.insert(
+            ["c", "a", "b"]
+                .iter()
+                .collect::<std::path::PathBuf>()
+                .to_string_lossy()
+                .to_string(),
+        );
+        correct.insert(
+            ["a", "b"]
+                .iter()
+                .collect::<std::path::PathBuf>()
+                .to_string_lossy()
+                .to_string(),
+        );
+        assert_eq!(simplify_dir_names(vec!["a/b", "c/a/b/", "b"]), correct);
+    }
+
+    #[test]
+    fn test_simplify_dir_dots() {
+        let mut correct = HashSet::new();
+        correct.insert("src".to_string());
+        assert_eq!(simplify_dir_names(vec!["src/."]), correct);
+    }
+
+    #[test]
+    fn test_simplify_dir_substring_names() {
+        let mut correct = HashSet::new();
+        correct.insert("src".to_string());
+        correct.insert("src_v2".to_string());
+        assert_eq!(simplify_dir_names(vec!["src/", "src_v2"]), correct);
+    }
+
+    #[test]
+    fn test_is_a_parent_of() {
+        assert!(is_a_parent_of("/usr", "/usr/andy"));
+        assert!(is_a_parent_of("/usr", "/usr/andy/i/am/descendant"));
+        assert!(!is_a_parent_of("/usr", "/usr/."));
+        assert!(!is_a_parent_of("/usr", "/usr/"));
+        assert!(!is_a_parent_of("/usr", "/usr"));
+        assert!(!is_a_parent_of("/usr/", "/usr"));
+        assert!(!is_a_parent_of("/usr/andy", "/usr"));
+        assert!(!is_a_parent_of("/usr/andy", "/usr/sibling"));
+        assert!(!is_a_parent_of("/usr/folder", "/usr/folder_not_a_child"));
+    }
+
+    #[test]
+    fn test_is_a_parent_of_root() {
+        assert!(is_a_parent_of("/", "/usr/andy"));
+        assert!(is_a_parent_of("/", "/usr"));
+        assert!(!is_a_parent_of("/", "/"));
    }
 }
--- a/src/utils/platform.rs
+++ b/src/utils/platform.rs
@@ -1,5 +1,9 @@
-use walkdir::DirEntry;
+use jwalk::DirEntry;
+#[allow(unused_imports)]
+use std::fs;
+use std::io;

+#[cfg(target_family = "unix")]
 fn get_block_size() -> u64 {
    // All os specific implementations of MetatdataExt seem to define a block as 512 bytes
    // https://doc.rust-lang.org/std/os/linux/fs/trait.MetadataExt.html#tymethod.st_blocks
@@ -9,17 +13,53 @@ fn get_block_size() -> u64 {
 #[cfg(target_family = "unix")]
 pub fn get_metadata(d: &DirEntry, use_apparent_size: bool) -> Option<(u64, Option<(u64, u64)>)> {
    use std::os::unix::fs::MetadataExt;
-    d.metadata().ok().map_or(None, |md| {
+    d.metadata.as_ref().unwrap().as_ref().ok().map(|md| {
        let inode = Some((md.ino(), md.dev()));
        if use_apparent_size {
-            Some((md.len(), inode))
+            (md.len(), inode)
        } else {
-            Some((md.blocks() * get_block_size(), inode))
+            (md.blocks() * get_block_size(), inode)
        }
    })
 }

-#[cfg(not(target_family = "unix"))]
-pub fn get_metadata(d: &DirEntry, _apparent: bool) -> Option<(u64, Option<(u64, u64)>)> {
-    d.metadata().ok().map_or(None, |md| Some((md.len(), None)))
+#[cfg(target_family = "windows")]
+pub fn get_metadata(d: &DirEntry, _use_apparent_size: bool) -> Option<(u64, Option<(u64, u64)>)> {
+    use winapi_util::file::information;
+    use winapi_util::Handle;
+
+    let h = Handle::from_path_any(d.path()).ok()?;
+    let info = information(&h).ok()?;
+
+    Some((
+        info.file_size(),
+        Some((info.file_index(), info.volume_serial_number())),
+    ))
+}
+
+#[cfg(all(not(target_family = "windows"), not(target_family = "unix")))]
+pub fn get_metadata(d: &DirEntry, _apparent: bool) -> Option<(u64, Option<(u64, u64)>)> {
+    d.metadata
+        .as_ref()
+        .unwrap()
+        .as_ref()
+        .ok()
+        .map(|md| (md.len(), None))
+}
+
+#[cfg(target_family = "unix")]
+pub fn get_filesystem(file_path: &str) -> Result<u64, io::Error> {
+    use std::os::unix::fs::MetadataExt;
+    let metadata = fs::metadata(file_path)?;
+    Ok(metadata.dev())
+}
+
+#[cfg(target_family = "windows")]
+pub fn get_filesystem(file_path: &str) -> Result<u64, io::Error> {
+    use winapi_util::file::information;
+    use winapi_util::Handle;
+
+    let h = Handle::from_path_any(file_path)?;
+    let info = information(&h)?;
+    Ok(info.volume_serial_number())
 }
Author	SHA1	Message	Date
andy.boot	75e419e7ed	Update README.md Remove section on performance, I can not replicate this and don't want to cause controversy.	2020-02-03 20:54:19 +00:00
andy.boot	4a62fc5726	Update README.md include dutree in alternatives	2020-02-03 20:52:12 +00:00
andy boot	d2b959fdcf	Merge pull request #62 from rivy/add.gha Fix windows compilation and testing	2020-02-03 20:31:37 +00:00
Roy Ivy III	36ebb1b2b0	refactor ~ `strip_trailing_curdirs()` -> `normalize_path()` (a more accurate descriptor)	2020-01-29 18:36:13 -06:00
Roy Ivy III	e126a01096	Tests ~ improve portability of tests for 'Fix ~ improve portability of path manipulation'	2020-01-29 18:36:13 -06:00
Roy Ivy III	7a38a26593	Fix ~ (WinAPI) must use `Handle::from_path_any()` if target path might be a directory .# [why] "If you use `from_path()` on a directory, then subsequent queries using that handle will fail." Instead, use `from_path_any()` which supports opening files or directories. ref: "Struct winapi_util::Handle" from <https://docs.rs/crate/winapi-util>	2020-01-29 18:36:13 -06:00
Roy Ivy III	1af6e1f757	Tests ~ simplify by ignoring instead of skipping tests for 'Tests ~ disable two symlink tests which may not be possible on 'windows''	2020-01-29 18:36:13 -06:00
Roy Ivy III	affafcc5f2	Tests ~ simplify by ignoring instead of skipping tests for 'Tests ~ temporarily disable tests which vary by 'windows' hosts'	2020-01-29 18:36:13 -06:00
Roy Ivy III	26ef8c3e59	Tests ~ add test case to 'Fix ~ improve portability of path manipulation'	2020-01-29 18:36:13 -06:00
Roy Ivy III	0898ee6bf0	Maint/CI ~ temporarily disable non-working `cargo tarpaulin` test coverage	2020-01-29 18:36:13 -06:00
Roy Ivy III	5ac168868e	Tests ~ temporarily disable tests which vary by 'windows' hosts	2020-01-29 18:36:13 -06:00
Roy Ivy III	684994ee11	Tests ~ disable two symlink tests which may not be possible on 'windows'	2020-01-29 18:36:12 -06:00
Roy Ivy III	416ad517fe	Tests ~ fix windows testing	2020-01-29 18:36:12 -06:00
Roy Ivy III	7c34389aea	Fix ~ improve portability of path manipulation	2020-01-29 18:36:12 -06:00
Roy Ivy III	18510130d8	Maint/CI ~ add GitHub-Actions CI (aka GHA)	2020-01-29 18:36:12 -06:00
andy boot	0bf8c914b7	Merge pull request #59 from Celti/exclude-multiple Allow multiple --ignore-directory flags	2020-01-21 23:32:49 +00:00
Celti Burroughs	95888d5f31	Allow multiple --ignore-directory flags	2020-01-21 15:40:04 -07:00
andy boot	5d195e27cb	Merge pull request #61 from lespea/fixWinBreaks Fix get_metadata on windows	2020-01-21 22:06:00 +00:00
Adam Lesperance	0c7b05fec9	Fix get_metadata on windows The MetadataExt functions are nightly-only right now so we need to call the windows api ourselves to get the device number. The winapi_util package has a nice wrapper to do this for us. The get_device function doesn't appear to be used anywhere so I removed it.	2020-01-21 00:06:41 -06:00
andy boot	bc895879e6	Update README.md	2020-01-20 23:36:59 +00:00
andy boot	31f01c061a	Update README.md	2020-01-19 09:55:51 +00:00
andy boot	17894e723c	Merge pull request #55 from bootandy/ab-neaten Ab fix clippy warnings, increment version number	2020-01-19 09:51:33 +00:00
andy boot	6141ddddea	Merge pull request #54 from bootandy/ab-ignore-dir Add option to ignore directories	2020-01-19 09:35:04 +00:00
andy.boot	352c0f7d90	Increment version number	2020-01-19 09:32:49 +00:00
andy.boot	842a8ec673	Clean up clippy warnings	2020-01-19 09:32:35 +00:00
andy.boot	d97edba041	Add option to ignore directories https://github.com/bootandy/dust/issues/46 Add -X flag used to ignore any file or directory that matches the provided substring. This means that -X e will ignore any file or directory with an 'e' in it.	2020-01-19 09:23:13 +00:00
andy boot	f64e0094f1	Merge pull request #53 from bootandy/single_cpu Fix dust for single core machines	2020-01-18 23:06:28 +00:00
andy.boot	3d2477e554	Allow dust to run on single core machines Force dust to use 2 threads if there is only 1 cpu JWalk breaks if it tries to run on a single cpu https://github.com/jessegrosjean/jwalk/issues/15 This is a hack because I can't figure out how to fix JWalk. This code and the num_cpu crate can be removed when the bug is fixed Also I have conflated cpus with cores while describing this issue. It is very difficult to test as I don't have a single core machine.	2020-01-18 22:04:08 +00:00
andy.boot	350d695f7c	Add num_cpus as Cargo dependency Will be used to detect single core computers which crash Jwalk	2020-01-18 21:57:11 +00:00
andy boot	f8b8b8a788	Merge pull request #51 from bootandy/ab-exclude Support excluding filesystems with -x	2020-01-18 21:54:41 +00:00
andy.boot	b9c27f9838	get_filesystem returns Result instead of option Removes unwrap and returns a Result instead of panicing if an invalid path is given. Previously if the flag: '-x' was provided with an argument of an invalid directory the code would crash here	2020-01-16 23:50:56 +00:00
andy.boot	5541df6a73	Refactor code Reduce complexity of examine_dir. No logic changes	2020-01-15 20:10:33 +00:00
andy.boot	bdc3d404ef	Support excluding filesystems with -x https://github.com/bootandy/dust/issues/50 Add optional -x flag to limit search to the current filesystem. Add (untested) support for windows for the equivalent of inode and device.	2020-01-15 19:51:16 +00:00
andy boot	f395a7d768	Merge pull request #49 from bootandy/ab-upgrade Upgrade libraries. Fix assert_cli	2019-12-30 22:07:04 +00:00
andy.boot	a36eec6cae	Increment version number	2019-12-30 21:40:30 +00:00
Adam Lesperance	38938e005e	Fix colors on windows * Initialize ansi_term if we're on windows * Silence build warning on non-unix targets * Update ansi-term which has windows specific fixes (and assert_cli while I'm at it)	2019-12-30 21:36:49 +00:00
andy.boot	da61b15715	Upgrade libraries. Fix assert_cli New assert_cli library requires we cast the param passed to 'is()' as it can no longer cast implicitly. I am guessing this is because it is due to confusion between whether to cast to u8 or str	2019-12-30 21:23:53 +00:00
andy boot	0b22d0a977	Merge pull request #47 from bootandy/ab-bug-fix Ab bug fix	2019-12-30 21:12:37 +00:00
andy.boot	356d14ac0f	Hack fix around JWalk behaviour. Jwalk returns '/' as a child of the current node which breaks things. https://github.com/jessegrosjean/jwalk/issues/13	2019-12-23 15:51:12 +00:00
andy.boot	311bc45388	Verify that '/' is parent of everything Bug could occur when run with '/' as it wasn't considered the parent of '/usr' due to having the same number of '/'s in the name	2019-12-23 15:50:01 +00:00
andy.boot	ef66fb3938	Remove useless sort The data coming in is already sorted. We should not need to sort it a second time	2019-12-23 15:49:26 +00:00
andy.boot	b934445e04	Pin jwalk to dependency version https://github.com/jessegrosjean/jwalk/issues/13 Having raised the above issue I don't want it fixed in a minor version as I have added a work around	2019-12-23 15:48:38 +00:00
andy boot	a6839c020f	Merge pull request #43 from bootandy/no_color Add flag for No color, refactor tests	2019-12-08 23:50:58 +00:00
andy.boot	7e47d5b47a	Increment version number	2019-12-08 23:36:48 +00:00
andy.boot	6a65570f3f	Refactor tests Make use of the 'is' more to test the entire output. Add test for no_color mode. Replace several calls to format_string with calls that build a string directly. I feel format_string is becoming unweildly and this simplfies the tests	2019-12-08 23:34:28 +00:00
andy.boot	a4ca78dbe4	Add option flag for no colors https://github.com/bootandy/dust/issues/37	2019-12-08 14:46:45 +00:00
andy boot	bfbe8a57ae	Merge pull request #42 from bootandy/cleanup Cleanup code & fix issue	2019-12-07 09:16:51 +00:00
andy.boot	b4b73e45f3	Cargo update	2019-12-05 21:51:04 +00:00
andy.boot	78119aba0f	Mark function as ignored by clippy We don't want to collapse this if - it is easier to reason about this way	2019-12-05 21:50:26 +00:00
andy.boot	5535478fe8	Fix substring bug When one directory was a substring of another the directory would appear as a subdirectory instead of a sibling Fixed originally by this: `6e03dd77e6` Broken by this: `db6c8a019d` Added integration test as this has bitten me before	2019-12-05 21:35:15 +00:00
andy.boot	7ba91a4a22	Rename variable cpu -> threads. threads more accurately represents the number of threads we will start to run	2019-12-04 20:49:45 +00:00
andy boot	79416fd5fc	Merge pull request #40 from AdminXVII/parallel-walk Use jwalk instead of walkdir: parallel walking for performance boost	2019-12-04 20:45:25 +00:00
Xavier L'Heureux	b66523cff3	Apply clippy lints	2019-12-03 18:34:47 -05:00
Xavier L'Heureux	19a41aa382	Add CLI option for the number of threads to spawn	2019-12-03 18:27:02 -05:00
Xavier L'Heureux	62ac9b623a	Make sure to count the hidden directories	2019-11-26 08:31:52 -05:00
Xavier L'Heureux	bf28d42483	Update Performance section of README	2019-11-26 08:31:52 -05:00
Xavier L'Heureux	f8ce6c97bf	Use more rusty patterns and preallocate enough space	2019-11-26 08:31:52 -05:00
Xavier L'Heureux	86b3cccaf6	perf(IO): use parallel walkdir (jwalk) for super faster traversal	2019-11-26 08:31:52 -05:00
andy boot	3c920431fa	Merge pull request #38 from lespea/update_deps Latest deps	2019-11-25 23:32:09 +00:00
Adam Lesperance	a1ece05af5	Testing deps should only be used when testing	2019-11-21 00:05:53 -06:00
Adam Lesperance	cef2c588b7	Latest deps	2019-11-20 23:05:57 -06:00
andy boot	7d8e498238	Merge pull request #36 from bootandy/try_to_fix_releases Update secure key in Travis	2019-11-02 01:11:42 +00:00
andy boot	53c7a69dcb	Merge pull request #35 from bootandy/fix-version Provide version information with -V	2019-11-02 00:45:36 +00:00
andy.boot	9a9cbefd3d	Provide version information with -V clap does most of this for you - I had forgotten to wire it up https://github.com/bootandy/dust/issues/33 increment build version	2019-11-02 00:42:57 +00:00
andy boot	224a2c6f25	Merge pull request #32 from mvertescher/update-edition Upgrade to the 2018 edition	2019-10-27 10:39:04 +00:00
Matt Vertescher	99003cbba9	Upgrade to the 2018 edition	2019-10-26 15:19:07 -04:00
andy.boot	c83803b440	Add comment to travis file So I don't forget how to do a release next time	2019-10-09 00:43:04 +01:00
andy.boot	a41862d799	Travis release: Read API key from variable secure key was probably removed. Read from travis ci env variable instead	2019-10-09 00:35:30 +01:00
andy.boot	6ab46d8471	Add reverse instructions	2019-10-08 22:46:52 +01:00
andy boot	c727eb2d11	Merge pull request #31 from bootandy/nodes_rev Refactor & support reverse	2019-10-08 21:31:11 +01:00
andy.boot	0effaa7fd7	Increment version	2019-10-08 21:05:37 +01:00
andy.boot	25c50f88c4	cargo upgrade	2019-10-08 21:05:09 +01:00
andy.boot	0c19a66432	Add test for reverse flag	2019-10-08 20:57:44 +01:00
andy.boot	4cffc4370b	Bring back the reverse flag Following the large refactor on the previous commit, this commit fixes the reverse functionality. Depth detection moved into the tree building instead of being calculated when drawing the tree to screen	2019-10-06 22:00:40 +01:00
andy.boot	db6c8a019d	Massive refactor WIP Replace array of (string, int) pairs with tree of nodes. A tree of nodes more accurately represents the underlying file structure and hence is a better fit for the problem space. Regression: Reverse doesn't work in this commit. I suspect more methods can be simplifed and reduced.	2019-10-05 17:57:47 +01:00
andy.boot	e03094a4fa	Add reverse flag Pull several variables related to how output is printed into DisplayData struct	2019-10-03 23:07:52 +01:00
andy.boot	1d9a56e025	A way of supporting reverse	2019-10-02 22:31:49 +01:00
andy.boot	ec2d9e19d4	Run format, introduce new function. strip_end_slash_including_root will remove end slashes including the root directory. The root directory has been a long running problem because if we strip the final slash we will run dust on no directory instead of the root.	2019-10-02 20:14:13 +01:00
andy.boot	9fbfcb275a	pull out a method (will be needed for reverse)	2019-10-02 20:06:09 +01:00
andy.boot	1c60d1e2ac	Display: replace boolean with integer count This will probably be useful when i refactor for the reverse mode	2019-10-02 19:54:00 +01:00
andy.boot	fd35734a94	Simplify string code, remove into	2019-10-02 19:48:57 +01:00
andy boot	c6f4ace2b6	Merge pull request #30 from bootandy/neaten Neaten	2019-10-02 19:16:31 +01:00
Bob	d46b63fad8	Add detection of files which fail permission Old code caught some file permission denied but not all.	2019-10-01 22:44:17 +01:00
Bob	872a49bb7d	better var name	2019-10-01 22:35:29 +01:00
andy boot	04c6c204c3	Merge pull request #27 from bootandy/new2	2019-10-01 22:26:56 +01:00
Bob	7ac01e8166	Increment version number	2019-10-01 22:18:36 +01:00
Bob	2f7a88e8dc	Fix issues from running on root directory clean up: `80338f4` Fixes -d flag to work again. Add test to stop regression	2019-10-01 22:18:16 +01:00
Bob	2ca2cebdad	New Cargo lock	2019-09-29 11:28:51 +01:00
bootandy	80338f4731	Fix running on root dir / Fixes: https://github.com/bootandy/dust/issues/22 Allows code to run on the root directory	2019-07-04 00:03:33 +01:00
bootandy	d327bd2e68	Fix code to handle single dots in path Before this fix adding a single dot to the end of a path would cause the code to crash.	2019-07-02 00:56:43 +01:00
bootandy	7db6cf2f32	Add test to handle single dot in path	2019-07-02 00:54:58 +01:00
bootandy	76d0762c97	Add assert to stop infinite loops	2019-07-01 22:43:10 +01:00
bootandy	6e03dd77e6	Fix obscure display bug When one directory was a substring of another with files in the files could appear as children of the wrong directory Fix: https://github.com/bootandy/dust/issues/25	2019-07-01 22:25:06 +01:00
bootandy	4906e9efda	comment typos	2019-07-01 22:25:06 +01:00
bootandy	876609f2cb	Obey new clippy Clippy is like having a reviewer fix your dodgy code.	2019-07-01 22:25:06 +01:00
bootandy	12775db94b	Update git ignore to ignore idea	2019-07-01 22:25:06 +01:00
bootandy	bfaf5ee173	Add bash line to ci script	2019-07-01 22:25:06 +01:00
bootandy	fd68330815	Update cargo lock	2019-07-01 22:25:06 +01:00
andy.boot	0bf4ebf554	Fix minor color bug If we are not using RED then the Color should be the terminal default not 7	2018-06-19 23:39:23 +01:00
andy boot	cab24f58d5	Merge pull request #20 from bootandy/refac Refactor	2018-05-10 18:28:07 +01:00
andy.boot	b1b933d851	Refactor & Optimize use of depth Code Refactored Using Depth now prunes the tree below the displayable depth so display calls finish quicker.	2018-05-10 17:36:56 +01:00