tests: Cleanup test_exact_ouput

Stop -j writing to a file, print to stdout instead.

completions/_dust

@@ -66,6 +66,7 @@ _dust() {
 '(-d --depth -D --only-dir)--file_types[show only these file types]' \
 '-P[Disable the progress indication.]' \
 '--no-progress[Disable the progress indication.]' \
+'--print-errors[Print path with errors.]' \
 '(-F --only-file -t --file_types)-D[Only directories will be displayed.]' \
 '(-F --only-file -t --file_types)--only-dir[Only directories will be displayed.]' \
 '(-D --only-dir)-F[Only files will be displayed. (Finds your largest files)]' \

completions/_dust.ps1

@@ -72,6 +72,7 @@ Register-ArgumentCompleter -Native -CommandName 'dust' -ScriptBlock {
             [CompletionResult]::new('--file_types', 'file_types', [CompletionResultType]::ParameterName, 'show only these file types')
             [CompletionResult]::new('-P', 'P ', [CompletionResultType]::ParameterName, 'Disable the progress indication.')
             [CompletionResult]::new('--no-progress', 'no-progress', [CompletionResultType]::ParameterName, 'Disable the progress indication.')
+            [CompletionResult]::new('--print-errors', 'print-errors', [CompletionResultType]::ParameterName, 'Print path with errors.')
             [CompletionResult]::new('-D', 'D ', [CompletionResultType]::ParameterName, 'Only directories will be displayed.')
             [CompletionResult]::new('--only-dir', 'only-dir', [CompletionResultType]::ParameterName, 'Only directories will be displayed.')
             [CompletionResult]::new('-F', 'F ', [CompletionResultType]::ParameterName, 'Only files will be displayed. (Finds your largest files)')

completions/dust.bash

@@ -19,7 +19,7 @@ _dust() {
 
     case "${cmd}" in
         dust)
-            opts="-d -T -n -p -X -I -L -x -s -r -c -C -b -B -z -R -f -i -v -e -t -w -P -D -F -o -S -j -h -V --depth --threads --number-of-lines --full-paths --ignore-directory --ignore-all-in-file --dereference-links --limit-filesystem --apparent-size --reverse --no-colors --force-colors --no-percent-bars --bars-on-right --min-size --screen-reader --skip-total --filecount --ignore_hidden --invert-filter --filter --file_types --terminal_width --no-progress --only-dir --only-file --output-format --stack-size --output-json --help --version [PATH]..."
+            opts="-d -T -n -p -X -I -L -x -s -r -c -C -b -B -z -R -f -i -v -e -t -w -P -D -F -o -S -j -h -V --depth --threads --number-of-lines --full-paths --ignore-directory --ignore-all-in-file --dereference-links --limit-filesystem --apparent-size --reverse --no-colors --force-colors --no-percent-bars --bars-on-right --min-size --screen-reader --skip-total --filecount --ignore_hidden --invert-filter --filter --file_types --terminal_width --no-progress --print-errors --only-dir --only-file --output-format --stack-size --output-json --help --version [PATH]..."
             if [[ ${cur} == -* || ${COMP_CWORD} -eq 1 ]] ; then
                 COMPREPLY=( $(compgen -W "${opts}" -- "${cur}") )
                 return 0

completions/dust.elv

@@ -69,6 +69,7 @@ set edit:completion:arg-completer[dust] = {|@words|
             cand --file_types 'show only these file types'
             cand -P 'Disable the progress indication.'
             cand --no-progress 'Disable the progress indication.'
+            cand --print-errors 'Print path with errors.'
             cand -D 'Only directories will be displayed.'
             cand --only-dir 'Only directories will be displayed.'
             cand -F 'Only files will be displayed. (Finds your largest files)'

completions/dust.fish

@@ -24,6 +24,7 @@ complete -c dust -s f -l filecount -d 'Directory \'size\' is number of child fil
 complete -c dust -s i -l ignore_hidden -d 'Do not display hidden files'
 complete -c dust -s t -l file_types -d 'show only these file types'
 complete -c dust -s P -l no-progress -d 'Disable the progress indication.'
+complete -c dust -l print-errors -d 'Print path with errors.'
 complete -c dust -s D -l only-dir -d 'Only directories will be displayed.'
 complete -c dust -s F -l only-file -d 'Only files will be displayed. (Finds your largest files)'
 complete -c dust -s j -l output-json -d 'Output the directory tree as json to the current directory'

man-page/dust.1

@@ -4,7 +4,7 @@
 .SH NAME
 Dust \- Like du but more intuitive
 .SH SYNOPSIS
-\fBdust\fR [\fB\-d\fR|\fB\-\-depth\fR] [\fB\-T\fR|\fB\-\-threads\fR] [\fB\-n\fR|\fB\-\-number\-of\-lines\fR] [\fB\-p\fR|\fB\-\-full\-paths\fR] [\fB\-X\fR|\fB\-\-ignore\-directory\fR] [\fB\-I\fR|\fB\-\-ignore\-all\-in\-file\fR] [\fB\-L\fR|\fB\-\-dereference\-links\fR] [\fB\-x\fR|\fB\-\-limit\-filesystem\fR] [\fB\-s\fR|\fB\-\-apparent\-size\fR] [\fB\-r\fR|\fB\-\-reverse\fR] [\fB\-c\fR|\fB\-\-no\-colors\fR] [\fB\-C\fR|\fB\-\-force\-colors\fR] [\fB\-b\fR|\fB\-\-no\-percent\-bars\fR] [\fB\-B\fR|\fB\-\-bars\-on\-right\fR] [\fB\-z\fR|\fB\-\-min\-size\fR] [\fB\-R\fR|\fB\-\-screen\-reader\fR] [\fB\-\-skip\-total\fR] [\fB\-f\fR|\fB\-\-filecount\fR] [\fB\-i\fR|\fB\-\-ignore_hidden\fR] [\fB\-v\fR|\fB\-\-invert\-filter\fR] [\fB\-e\fR|\fB\-\-filter\fR] [\fB\-t\fR|\fB\-\-file_types\fR] [\fB\-w\fR|\fB\-\-terminal_width\fR] [\fB\-P\fR|\fB\-\-no\-progress\fR] [\fB\-D\fR|\fB\-\-only\-dir\fR] [\fB\-F\fR|\fB\-\-only\-file\fR] [\fB\-o\fR|\fB\-\-output\-format\fR] [\fB\-S\fR|\fB\-\-stack\-size\fR] [\fB\-j\fR|\fB\-\-output\-json\fR] [\fB\-h\fR|\fB\-\-help\fR] [\fB\-V\fR|\fB\-\-version\fR] [\fIPATH\fR] 
+\fBdust\fR [\fB\-d\fR|\fB\-\-depth\fR] [\fB\-T\fR|\fB\-\-threads\fR] [\fB\-n\fR|\fB\-\-number\-of\-lines\fR] [\fB\-p\fR|\fB\-\-full\-paths\fR] [\fB\-X\fR|\fB\-\-ignore\-directory\fR] [\fB\-I\fR|\fB\-\-ignore\-all\-in\-file\fR] [\fB\-L\fR|\fB\-\-dereference\-links\fR] [\fB\-x\fR|\fB\-\-limit\-filesystem\fR] [\fB\-s\fR|\fB\-\-apparent\-size\fR] [\fB\-r\fR|\fB\-\-reverse\fR] [\fB\-c\fR|\fB\-\-no\-colors\fR] [\fB\-C\fR|\fB\-\-force\-colors\fR] [\fB\-b\fR|\fB\-\-no\-percent\-bars\fR] [\fB\-B\fR|\fB\-\-bars\-on\-right\fR] [\fB\-z\fR|\fB\-\-min\-size\fR] [\fB\-R\fR|\fB\-\-screen\-reader\fR] [\fB\-\-skip\-total\fR] [\fB\-f\fR|\fB\-\-filecount\fR] [\fB\-i\fR|\fB\-\-ignore_hidden\fR] [\fB\-v\fR|\fB\-\-invert\-filter\fR] [\fB\-e\fR|\fB\-\-filter\fR] [\fB\-t\fR|\fB\-\-file_types\fR] [\fB\-w\fR|\fB\-\-terminal_width\fR] [\fB\-P\fR|\fB\-\-no\-progress\fR] [\fB\-\-print\-errors\fR] [\fB\-D\fR|\fB\-\-only\-dir\fR] [\fB\-F\fR|\fB\-\-only\-file\fR] [\fB\-o\fR|\fB\-\-output\-format\fR] [\fB\-S\fR|\fB\-\-stack\-size\fR] [\fB\-j\fR|\fB\-\-output\-json\fR] [\fB\-h\fR|\fB\-\-help\fR] [\fB\-V\fR|\fB\-\-version\fR] [\fIPATH\fR] 
 .SH DESCRIPTION
 Like du but more intuitive
 .SH OPTIONS
@@ -81,6 +81,9 @@ Specify width of output overriding the auto detection of terminal width
 \fB\-P\fR, \fB\-\-no\-progress\fR
 Disable the progress indication.
 .TP
+\fB\-\-print\-errors\fR
+Print path with errors.
+.TP
 \fB\-D\fR, \fB\-\-only\-dir\fR
 Only directories will be displayed.
 .TP

src/cli.rs

@@ -193,6 +193,12 @@ pub fn build_cli() -> Command {
                 .action(clap::ArgAction::SetTrue)
                 .help("Disable the progress indication."),
         )
+        .arg(
+            Arg::new("print_errors")
+                .long("print-errors")
+                .action(clap::ArgAction::SetTrue)
+                .help("Print path with errors."),
+        )
         .arg(
             Arg::new("only_dir")
                 .short('D')

src/config.rs

@@ -31,6 +31,7 @@ pub struct Config {
     pub stack_size: Option<usize>,
     pub threads: Option<usize>,
     pub output_json: Option<bool>,
+    pub print_errors: Option<bool>,
 }
 
 impl Config {
@@ -102,6 +103,10 @@ impl Config {
     pub fn get_only_dir(&self, options: &ArgMatches) -> bool {
         Some(true) == self.only_dir || options.get_flag("only_dir")
     }
+
+    pub fn get_print_errors(&self, options: &ArgMatches) -> bool {
+        Some(true) == self.print_errors || options.get_flag("print_errors")
+    }
     pub fn get_only_file(&self, options: &ArgMatches) -> bool {
         Some(true) == self.only_file || options.get_flag("only_file")
     }

src/dir_walker.rs

@@ -142,44 +142,49 @@ fn walk(dir: PathBuf, walk_data: &WalkData, depth: usize) -> Option<Node> {
                     .into_iter()
                     .par_bridge()
                     .filter_map(|entry| {
-                        if let Ok(ref entry) = entry {
-                            // uncommenting the below line gives simpler code but
-                            // rayon doesn't parallelize as well giving a 3X performance drop
-                            // hence we unravel the recursion a bit
+                        match entry {
+                            Ok(ref entry) => {
+                                // uncommenting the below line gives simpler code but
+                                // rayon doesn't parallelize as well giving a 3X performance drop
+                                // hence we unravel the recursion a bit
 
-                            // return walk(entry.path(), walk_data, depth)
+                                // return walk(entry.path(), walk_data, depth)
 
-                            if !ignore_file(entry, walk_data) {
-                                if let Ok(data) = entry.file_type() {
-                                    if data.is_dir()
-                                        || (walk_data.follow_links && data.is_symlink())
-                                    {
-                                        return walk(entry.path(), walk_data, depth + 1);
+                                if !ignore_file(entry, walk_data) {
+                                    if let Ok(data) = entry.file_type() {
+                                        if data.is_dir()
+                                            || (walk_data.follow_links && data.is_symlink())
+                                        {
+                                            return walk(entry.path(), walk_data, depth + 1);
+                                        }
+
+                                        let node = build_node(
+                                            entry.path(),
+                                            vec![],
+                                            walk_data.filter_regex,
+                                            walk_data.invert_filter_regex,
+                                            walk_data.use_apparent_size,
+                                            data.is_symlink(),
+                                            data.is_file(),
+                                            walk_data.by_filecount,
+                                            depth,
+                                        );
+
+                                        prog_data.num_files.fetch_add(1, ORDERING);
+                                        if let Some(ref file) = node {
+                                            prog_data
+                                                .total_file_size
+                                                .fetch_add(file.size, ORDERING);
+                                        }
+
+                                        return node;
                                     }
-
-                                    let node = build_node(
-                                        entry.path(),
-                                        vec![],
-                                        walk_data.filter_regex,
-                                        walk_data.invert_filter_regex,
-                                        walk_data.use_apparent_size,
-                                        data.is_symlink(),
-                                        data.is_file(),
-                                        walk_data.by_filecount,
-                                        depth,
-                                    );
-
-                                    prog_data.num_files.fetch_add(1, ORDERING);
-                                    if let Some(ref file) = node {
-                                        prog_data.total_file_size.fetch_add(file.size, ORDERING);
-                                    }
-
-                                    return node;
                                 }
                             }
-                        } else {
-                            let mut editable_error = errors.lock().unwrap();
-                            editable_error.no_permissions = true
+                            Err(ref failed) => {
+                                let mut editable_error = errors.lock().unwrap();
+                                editable_error.no_permissions.insert(failed.to_string());
+                            }
                         }
                         None
                     })
@@ -189,7 +194,9 @@ fn walk(dir: PathBuf, walk_data: &WalkData, depth: usize) -> Option<Node> {
                 let mut editable_error = errors.lock().unwrap();
                 match failed.kind() {
                     std::io::ErrorKind::PermissionDenied => {
-                        editable_error.no_permissions = true;
+                        editable_error
+                            .no_permissions
+                            .insert(dir.to_string_lossy().into());
                     }
                     std::io::ErrorKind::NotFound => {
                         editable_error.file_not_found.insert(failed.to_string());

src/main.rs

@@ -252,7 +252,6 @@ fn main() {
     }
 
     let final_errors = walk_data.errors.lock().unwrap();
-    let failed_permissions = final_errors.no_permissions;
     if !final_errors.file_not_found.is_empty() {
         let err = final_errors
             .file_not_found
@@ -262,8 +261,20 @@ fn main() {
             .join(", ");
         eprintln!("No such file or directory: {}", err);
     }
-    if failed_permissions {
-        eprintln!("Did not have permissions for all directories");
+    if !final_errors.no_permissions.is_empty() {
+        if config.get_print_errors(&options) {
+            let err = final_errors
+                .no_permissions
+                .iter()
+                .map(|a| a.as_ref())
+                .collect::<Vec<&str>>()
+                .join(", ");
+            eprintln!("Did not have permissions for directories: {}", err);
+        } else {
+            eprintln!(
+                "Did not have permissions for all directories (add --print-errors to see errors)"
+            );
+        }
     }
     if !final_errors.unknown_error.is_empty() {
         let err = final_errors

src/progress.rs

@@ -70,7 +70,7 @@ impl PAtomicInfo {
 
 #[derive(Default)]
 pub struct RuntimeErrors {
-    pub no_permissions: bool,
+    pub no_permissions: HashSet<String>,
     pub file_not_found: HashSet<String>,
     pub unknown_error: HashSet<String>,
     pub abort: bool,

tests/test_exact_output.rs

@@ -1,5 +1,6 @@
 use assert_cmd::Command;
 use std::ffi::OsStr;
+use std::process::Output;
 use std::str;
 use std::sync::Once;
 
@@ -38,29 +39,44 @@ fn initialize() {
         copy_test_data("tests/test_dir");
         copy_test_data("tests/test_dir2");
         copy_test_data("tests/test_dir_unicode");
+
+        Command::new("sh")
+            .arg("-c")
+            .arg("mkdir -p /tmp/unreadable_folder && chmod 000 /tmp/unreadable_folder")
+            .output()
+            .unwrap();
     });
 }
 
-fn exact_output_test<T: AsRef<OsStr>>(valid_outputs: Vec<String>, command_args: Vec<T>) {
+fn run_cmd<T: AsRef<OsStr>>(command_args: Vec<T>) -> Output {
     initialize();
-
-    let mut a = &mut Command::cargo_bin("dust").unwrap();
-
+    let mut to_run = &mut Command::cargo_bin("dust").unwrap();
     for p in command_args {
-        a = a.arg(p);
+        to_run = to_run.arg(p);
     }
+    to_run.unwrap()
+}
 
-    let output = str::from_utf8(&a.unwrap().stdout).unwrap().to_owned();
+fn exact_stdout_test<T: AsRef<OsStr>>(command_args: Vec<T>, valid_stdout: Vec<String>) {
+    let to_run = run_cmd(command_args);
 
-    let will_fail = valid_outputs.iter().any(|i| output.contains(i));
+    let stdout_output = str::from_utf8(&to_run.stdout).unwrap().to_owned();
+    let will_fail = valid_stdout.iter().any(|i| stdout_output.contains(i));
     if !will_fail {
         eprintln!(
-            "output:\n{}\ndoes not contain any of:\n{}",
-            output,
-            valid_outputs.join("\n\n")
+            "output(stdout):\n{}\ndoes not contain any of:\n{}",
+            stdout_output,
+            valid_stdout.join("\n\n")
         );
     }
-    assert!(will_fail)
+    assert!(will_fail);
+}
+
+fn exact_stderr_test<T: AsRef<OsStr>>(command_args: Vec<T>, valid_stderr: String) {
+    let to_run = run_cmd(command_args);
+
+    let stderr_output = str::from_utf8(&to_run.stderr).unwrap().trim();
+    assert_eq!(stderr_output, valid_stderr);
 }
 
 // "windows" result data can vary by host (size seems to be variable by one byte); fix code vs test and re-enable
@@ -68,7 +84,7 @@ fn exact_output_test<T: AsRef<OsStr>>(valid_outputs: Vec<String>, command_args:
 #[test]
 pub fn test_main_basic() {
     // -c is no color mode - This makes testing much simpler
-    exact_output_test(main_output(), vec!["-c", "-B", "/tmp/test_dir/"])
+    exact_stdout_test(vec!["-c", "-B", "/tmp/test_dir/"], main_output());
 }
 
 #[cfg_attr(target_os = "windows", ignore)]
@@ -81,7 +97,7 @@ pub fn test_main_multi_arg() {
         "/tmp/test_dir",
         "/tmp/test_dir",
     ];
-    exact_output_test(main_output(), command_args);
+    exact_stdout_test(command_args, main_output());
 }
 
 fn main_output() -> Vec<String> {
@@ -112,7 +128,7 @@ fn main_output() -> Vec<String> {
 #[test]
 pub fn test_main_long_paths() {
     let command_args = vec!["-c", "-p", "-B", "/tmp/test_dir/"];
-    exact_output_test(main_output_long_paths(), command_args);
+    exact_stdout_test(command_args, main_output_long_paths());
 }
 
 fn main_output_long_paths() -> Vec<String> {
@@ -140,7 +156,7 @@ fn main_output_long_paths() -> Vec<String> {
 #[test]
 pub fn test_substring_of_names_and_long_names() {
     let command_args = vec!["-c", "-B", "/tmp/test_dir2"];
-    exact_output_test(no_substring_of_names_output(), command_args);
+    exact_stdout_test(command_args, no_substring_of_names_output());
 }
 
 fn no_substring_of_names_output() -> Vec<String> {
@@ -174,7 +190,7 @@ fn no_substring_of_names_output() -> Vec<String> {
 #[test]
 pub fn test_unicode_directories() {
     let command_args = vec!["-c", "-B", "/tmp/test_dir_unicode"];
-    exact_output_test(unicode_dir(), command_args);
+    exact_stdout_test(command_args, unicode_dir());
 }
 
 fn unicode_dir() -> Vec<String> {
@@ -201,7 +217,7 @@ fn unicode_dir() -> Vec<String> {
 #[test]
 pub fn test_apparent_size() {
     let command_args = vec!["-c", "-s", "-b", "/tmp/test_dir"];
-    exact_output_test(apparent_size_output(), command_args);
+    exact_stdout_test(command_args, apparent_size_output());
 }
 
 fn apparent_size_output() -> Vec<String> {
@@ -222,3 +238,25 @@ fn apparent_size_output() -> Vec<String> {
 
     vec![one_space_before, two_space_before]
 }
+
+#[cfg_attr(target_os = "windows", ignore)]
+#[test]
+pub fn test_permission_normal() {
+    let command_args = vec!["/tmp/unreadable_folder"];
+    let permission_msg =
+        r#"Did not have permissions for all directories (add --print-errors to see errors)"#
+            .trim()
+            .to_string();
+    exact_stderr_test(command_args, permission_msg);
+}
+
+#[cfg_attr(target_os = "windows", ignore)]
+#[test]
+pub fn test_permission_flag() {
+    // add the flag to CLI
+    let command_args = vec!["--print-errors", "/tmp/unreadable_folder"];
+    let permission_msg = r#"Did not have permissions for directories: /tmp/unreadable_folder"#
+        .trim()
+        .to_string();
+    exact_stderr_test(command_args, permission_msg);
+}