diff --git a/Cargo.toml b/Cargo.toml
index d175e89..b305006 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,8 +1,8 @@
 [package]
 name = "dust"
-version = "0.1.0"
-authors = ["bootandy <bootandy@gmail.com>"]
+version = "0.1.1"
+authors = ["bootandy <bootandy@gmail.com>", "nebkor <code@ardent.nebcorp.com>"]
 
 [dependencies]
-ansi_term = "0.11"
+ansi_term = "*"
 clap = "2.31"
diff --git a/src/lib.rs b/src/lib.rs
new file mode 100644
index 0000000..039ca79
--- /dev/null
+++ b/src/lib.rs
@@ -0,0 +1,332 @@
+use std::collections::HashSet;
+
+use std::cmp::{self, Ordering};
+use std::fs::{self, Metadata, ReadDir};
+use std::io;
+
+#[derive(Clone, Debug)]
+struct Node {
+    dir: DirEnt,
+    children: Vec<Node>,
+}
+impl Ord for Node {
+    fn cmp(&self, other: &Self) -> Ordering {
+        if self.dir.size > other.dir.size {
+            Ordering::Less
+        } else if self.dir.size < other.dir.size {
+            Ordering::Greater
+        } else {
+            let my_slashes = self.dir.name.matches('/').count();
+            let other_slashes = other.dir.name.matches('/').count();
+
+            if my_slashes > other_slashes {
+                Ordering::Greater
+            } else if my_slashes < other_slashes {
+                Ordering::Less
+            } else {
+                if self.dir.name < other.dir.name {
+                    Ordering::Less
+                } else if self.dir.name > other.dir.name {
+                    Ordering::Greater
+                } else {
+                    Ordering::Equal
+                }
+            }
+        }
+    }
+}
+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.dir.name, self.dir.size) == (&other.dir.name, other.dir.size)
+    }
+}
+impl Eq for Node {}
+
+#[derive(Clone, Debug)]
+struct DirEnt {
+    name: String,
+    size: u64,
+}
+
+pub fn get_dir_tree(filenames: &Vec<&str>) -> (bool, Vec<Node>) {
+    let mut permissions = true;
+    let mut results = vec![];
+    for b in filenames {
+        let mut new_name = String::from(*b);
+        while new_name.chars().last() == Some('/') && new_name.len() != 1 {
+            new_name.pop();
+        }
+        let (hp, data) = examine_dir_str(new_name);
+        permissions = permissions && hp;
+        results.push(data);
+    }
+    (permissions, results)
+}
+
+fn examine_dir_str(loc: String) -> (bool, Node) {
+    let mut inodes: HashSet<u64> = HashSet::new();
+    let (hp, result) = examine_dir(fs::read_dir(&loc), &mut inodes);
+
+    // This needs to be folded into the below recursive call somehow
+    let new_size = result.iter().fold(0, |a, b| a + b.dir.size);
+    (
+        hp,
+        Node {
+            dir: DirEnt {
+                name: loc,
+                size: new_size,
+            },
+            children: result,
+        },
+    )
+}
+
+#[cfg(target_os = "linux")]
+fn get_metadata_blocks_and_inode(d: &std::fs::DirEntry) -> Option<(u64, u64)> {
+    use std::os::linux::fs::MetadataExt;
+    match d.metadata().ok() {
+        Some(md) => Some((md.len(), md.st_ino())),
+        None => None,
+    }
+}
+
+#[cfg(target_os = "unix")]
+fn get_metadata_blocks_and_inode(d: &std::fs::DirEntry) -> Option<(u64, u64)> {
+    use std::os::unix::fs::MetadataExt;
+    match d.metadata().ok() {
+        Some(md) => Some((md.len(), md.ino())),
+        None => None,
+    }
+}
+
+#[cfg(target_os = "macos")]
+fn get_metadata_blocks_and_inode(d: &std::fs::DirEntry) -> Option<(u64, u64)> {
+    use std::os::macos::fs::MetadataExt;
+    match d.metadata().ok() {
+        Some(md) => Some((md.len(), md.st_ino())),
+        None => None,
+    }
+}
+
+#[cfg(not(any(target_os = "linux", target_os = "unix", target_os = "macos")))]
+fn get_metadata_blocks_and_inode(_d: &std::fs::DirEntry) -> Option<(u64, u64)> {
+    match _d.metadata().ok() {
+        Some(md) => Some((md.len(), 0)), //move to option not 0
+        None => None,
+    }
+}
+
+fn examine_dir(a_dir: io::Result<ReadDir>, inodes: &mut HashSet<u64>) -> (bool, Vec<Node>) {
+    let mut result = vec![];
+    let mut have_permission = true;
+
+    if a_dir.is_ok() {
+        let paths = a_dir.unwrap();
+        for dd in paths {
+            match dd {
+                Ok(d) => {
+                    let file_type = d.file_type().ok();
+                    let maybe_size_and_inode = get_metadata_blocks_and_inode(&d);
+
+                    match (file_type, maybe_size_and_inode) {
+                        (Some(file_type), Some((size, inode))) => {
+                            let s = d.path().to_string_lossy().to_string();
+                            if inodes.contains(&inode) {
+                                continue;
+                            }
+                            inodes.insert(inode);
+
+                            if d.path().is_dir() && !file_type.is_symlink() {
+                                let (hp, recursive) = examine_dir(fs::read_dir(d.path()), inodes);
+                                have_permission = have_permission && hp;
+                                let new_size = recursive.iter().fold(size, |a, b| a + b.dir.size);
+                                result.push(Node {
+                                    dir: DirEnt {
+                                        name: s,
+                                        size: new_size,
+                                    },
+                                    children: recursive,
+                                })
+                            } else {
+                                result.push(Node {
+                                    dir: DirEnt {
+                                        name: s,
+                                        size: size,
+                                    },
+                                    children: vec![],
+                                })
+                            }
+                        }
+                        (_, None) => have_permission = false,
+                        (_, _) => (),
+                    }
+                }
+                Err(_) => (),
+            }
+        }
+    } else {
+        have_permission = false;
+    }
+    (have_permission, result)
+}
+
+// We start with a list of root directories - these must be the biggest folders
+// We then repeadedly merge in the children of the biggest directory - Each iteration
+// the next biggest directory's children are merged in.
+pub fn find_big_ones<'a>(l: &'a Vec<Node>, max_to_show: usize) -> Vec<&Node> {
+    let mut new_l: Vec<&Node> = l.iter().map(|a| a).collect();
+    new_l.sort();
+
+    for processed_pointer in 0..max_to_show {
+        if new_l.len() == processed_pointer {
+            break;
+        }
+        // Must be a list of pointers into new_l otherwise b_list will go out of scope
+        // when it is deallocated
+        let mut b_list: Vec<&Node> = new_l[processed_pointer]
+            .children
+            .iter()
+            .map(|a| a)
+            .collect();
+        new_l.extend(b_list);
+        new_l.sort();
+    }
+
+    if new_l.len() > max_to_show {
+        new_l[0..max_to_show + 1].to_vec()
+    } else {
+        new_l
+    }
+}
+
+pub fn display(permissions: bool, to_display: &Vec<&Node>) -> () {
+    if !permissions {
+        eprintln!("Did not have permissions for all directories");
+    }
+
+    display_node(to_display[0], &to_display, true, 1, "")
+}
+
+fn display_node<S: Into<String>>(
+    node_to_print: &Node,
+    to_display: &Vec<&Node>,
+    is_first: bool,
+    depth: u8,
+    indentation_str: S,
+) {
+    let mut is = indentation_str.into();
+    print_this_node(node_to_print, is_first, depth, is.as_ref());
+
+    is = is.replace("└─┬", "  ");
+    is = is.replace("└──", "  ");
+    is = is.replace("├──", "│ ");
+    is = is.replace("├─┬", "│ ");
+
+    let printable_node_slashes = node_to_print.dir.name.matches('/').count();
+
+    let mut num_siblings = to_display.iter().fold(0, |a, b| {
+        if node_to_print.children.contains(b)
+            && b.dir.name.matches('/').count() == printable_node_slashes + 1
+        {
+            a + 1
+        } else {
+            a
+        }
+    });
+
+    let mut is_biggest = true;
+    let mut has_display_children = false;
+    for node in to_display {
+        if node_to_print.children.contains(node) {
+            let has_children = node.children.len() > 0;
+            if node.dir.name.matches("/").count() == printable_node_slashes + 1 {
+                num_siblings -= 1;
+                for ref n in node.children.iter() {
+                    has_display_children = has_display_children || to_display.contains(n);
+                }
+                let has_children = has_children && has_display_children;
+                let tree_chars = {
+                    if num_siblings == 0 {
+                        if has_children {
+                            "└─┬"
+                        } else {
+                            "└──"
+                        }
+                    } else {
+                        if has_children {
+                            "├─┬"
+                        } else {
+                            "├──"
+                        }
+                    }
+                };
+                display_node(
+                    &node,
+                    to_display,
+                    is_biggest,
+                    depth + 1,
+                    is.to_string() + tree_chars,
+                );
+                is_biggest = false;
+            }
+        }
+    }
+}
+
+fn print_this_node(node_to_print: &Node, is_biggest: bool, depth: u8, indentation_str: &str) {
+    let padded_size = format!("{:>5}", human_readable_number(node_to_print.dir.size),);
+    println!(
+        "{} {} {}",
+        if is_biggest {
+            Fixed(196).paint(padded_size)
+        } else {
+            Fixed(7).paint(padded_size)
+        },
+        indentation_str,
+        Fixed(7)
+            .on(Fixed(cmp::min(8, (depth) as u8) + 231))
+            .paint(node_to_print.dir.name.to_string())
+    );
+}
+
+fn human_readable_number(size: u64) -> (String) {
+    let units = vec!["T", "G", "M", "K"]; //make static
+
+    //return format!("{}B", size);
+
+    for (i, u) in units.iter().enumerate() {
+        let marker = 1024u64.pow((units.len() - i) as u32);
+        if size >= marker {
+            if size / marker < 10 {
+                return format!("{:.1}{}", (size as f32 / marker as f32), u);
+            } else {
+                return format!("{}{}", (size / marker), u);
+            }
+        }
+    }
+    return format!("{}B", size);
+}
+
+mod tests {
+    #[allow(unused_imports)]
+    use super::*;
+
+    #[test]
+    fn test_human_readable_number() {
+        assert_eq!(human_readable_number(1), "1B");
+        assert_eq!(human_readable_number(956), "956B");
+        assert_eq!(human_readable_number(1004), "1004B");
+        assert_eq!(human_readable_number(1024), "1.0K");
+        assert_eq!(human_readable_number(1536), "1.5K");
+        assert_eq!(human_readable_number(1024 * 512), "512K");
+        assert_eq!(human_readable_number(1024 * 1024), "1.0M");
+        assert_eq!(human_readable_number(1024 * 1024 * 1024 - 1), "1023M");
+        assert_eq!(human_readable_number(1024 * 1024 * 1024 * 20), "20G");
+        assert_eq!(human_readable_number(1024 * 1024 * 1024 * 1024), "1.0T");
+    }
+}
diff --git a/src/main.rs b/src/main.rs
index 4630eac..4ff2f01 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,73 +1,12 @@
-// test:
-// recursive dirs that link to each other.
-// Pass in bad dir name
-// num to search for is less than num available
-// admin files.
-//
+extern crate dust;
+use dust::*;
+
 extern crate ansi_term;
+use ansi_term::Colour::Fixed;
 #[macro_use]
 extern crate clap;
-
-use std::collections::HashSet;
-
-use ansi_term::Colour::Fixed;
 use clap::{App, AppSettings, Arg};
 
-use std::cmp;
-use std::cmp::Ordering;
-use std::fs;
-use std::fs::ReadDir;
-use std::io;
-
-#[derive(Clone, Debug)]
-struct Node {
-    dir: Dir,
-    children: Vec<Node>,
-}
-impl Ord for Node {
-    fn cmp(&self, other: &Self) -> Ordering {
-        if self.dir.size > other.dir.size {
-            Ordering::Less
-        } else if self.dir.size < other.dir.size {
-            Ordering::Greater
-        } else {
-            let my_slashes = self.dir.name.matches('/').count();
-            let other_slashes = other.dir.name.matches('/').count();
-
-            if my_slashes > other_slashes {
-                Ordering::Greater
-            } else if my_slashes < other_slashes {
-                Ordering::Less
-            } else {
-                if self.dir.name < other.dir.name {
-                    Ordering::Less
-                } else if self.dir.name > other.dir.name {
-                    Ordering::Greater
-                } else {
-                    Ordering::Equal
-                }
-            }
-        }
-    }
-}
-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.dir.name, self.dir.size) == (&other.dir.name, other.dir.size)
-    }
-}
-impl Eq for Node {}
-
-#[derive(Clone, Debug)]
-struct Dir {
-    name: String,
-    size: u64,
-}
-
 static DEFAULT_NUMBER_OF_LINES: &'static str = "15";
 
 fn main() {
@@ -95,287 +34,3 @@ fn main() {
     let slice_it = find_big_ones(&results, number_of_lines);
     display(permissions, &slice_it);
 }
-
-fn get_dir_tree(filenames: &Vec<&str>) -> (bool, Vec<Node>) {
-    let mut permissions = true;
-    let mut results = vec![];
-    for b in filenames {
-        let mut new_name = String::from(*b);
-        while new_name.chars().last() == Some('/') && new_name.len() != 1 {
-            new_name.pop();
-        }
-        let (hp, data) = examine_dir_str(new_name);
-        permissions = permissions && hp;
-        results.push(data);
-    }
-    (permissions, results)
-}
-
-fn examine_dir_str(loc: String) -> (bool, Node) {
-    let mut inodes: HashSet<u64> = HashSet::new();
-    let (hp, result) = examine_dir(fs::read_dir(&loc), &mut inodes);
-
-    // This needs to be folded into the below recursive call somehow
-    let new_size = result.iter().fold(0, |a, b| a + b.dir.size);
-    (
-        hp,
-        Node {
-            dir: Dir {
-                name: loc,
-                size: new_size,
-            },
-            children: result,
-        },
-    )
-}
-
-#[cfg(target_os = "linux")]
-fn get_metadata_blocks_and_inode(d: &std::fs::DirEntry) -> Option<(u64, u64)> {
-    use std::os::linux::fs::MetadataExt;
-    match d.metadata().ok() {
-        Some(md) => Some((md.len(), md.st_ino())),
-        None => None,
-    }
-}
-
-#[cfg(target_os = "unix")]
-fn get_metadata_blocks_and_inode(d: &std::fs::DirEntry) -> Option<(u64, u64)> {
-    use std::os::unix::fs::MetadataExt;
-    match d.metadata().ok() {
-        Some(md) => Some((md.len(), md.ino())),
-        None => None,
-    }
-}
-
-#[cfg(target_os = "macos")]
-fn get_metadata_blocks_and_inode(d: &std::fs::DirEntry) -> Option<(u64, u64)> {
-    use std::os::macos::fs::MetadataExt;
-    match d.metadata().ok() {
-        Some(md) => Some((md.len(), md.st_ino())),
-        None => None,
-    }
-}
-
-#[cfg(not(any(target_os = "linux", target_os = "unix", target_os = "macos")))]
-fn get_metadata_blocks_and_inode(_d: &std::fs::DirEntry) -> Option<(u64, u64)> {
-    match _d.metadata().ok() {
-        Some(md) => Some((md.len(), 0)), //move to option not 0
-        None => None,
-    }
-}
-
-fn examine_dir(a_dir: io::Result<ReadDir>, inodes: &mut HashSet<u64>) -> (bool, Vec<Node>) {
-    let mut result = vec![];
-    let mut have_permission = true;
-
-    if a_dir.is_ok() {
-        let paths = a_dir.unwrap();
-        for dd in paths {
-            match dd {
-                Ok(d) => {
-                    let file_type = d.file_type().ok();
-                    let maybe_size_and_inode = get_metadata_blocks_and_inode(&d);
-
-                    match (file_type, maybe_size_and_inode) {
-                        (Some(file_type), Some((size, inode))) => {
-                            let s = d.path().to_string_lossy().to_string();
-                            if inodes.contains(&inode) {
-                                continue;
-                            }
-                            inodes.insert(inode);
-
-                            if d.path().is_dir() && !file_type.is_symlink() {
-                                let (hp, recursive) = examine_dir(fs::read_dir(d.path()), inodes);
-                                have_permission = have_permission && hp;
-                                let new_size = recursive.iter().fold(size, |a, b| a + b.dir.size);
-                                result.push(Node {
-                                    dir: Dir {
-                                        name: s,
-                                        size: new_size,
-                                    },
-                                    children: recursive,
-                                })
-                            } else {
-                                result.push(Node {
-                                    dir: Dir {
-                                        name: s,
-                                        size: size,
-                                    },
-                                    children: vec![],
-                                })
-                            }
-                        }
-                        (_, None) => have_permission = false,
-                        (_, _) => (),
-                    }
-                }
-                Err(_) => (),
-            }
-        }
-    } else {
-        have_permission = false;
-    }
-    (have_permission, result)
-}
-
-// We start with a list of root directories - these must be the biggest folders
-// We then repeadedly merge in the children of the biggest directory - Each iteration
-// the next biggest directory's children are merged in.
-fn find_big_ones<'a>(l: &'a Vec<Node>, max_to_show: usize) -> Vec<&Node> {
-    let mut new_l: Vec<&Node> = l.iter().map(|a| a).collect();
-    new_l.sort();
-
-    for processed_pointer in 0..max_to_show {
-        if new_l.len() == processed_pointer {
-            break;
-        }
-        // Must be a list of pointers into new_l otherwise b_list will go out of scope
-        // when it is deallocated
-        let mut b_list: Vec<&Node> = new_l[processed_pointer]
-            .children
-            .iter()
-            .map(|a| a)
-            .collect();
-        new_l.extend(b_list);
-        new_l.sort();
-        /*println!(
-            "{:?} -------------------",
-            new_l
-                .iter()
-                .map(|a| a.dir.size.to_string() + ": " + &a.dir.name)
-                .collect::<Vec<String>>()
-        );*/
-    }
-    if new_l.len() > max_to_show {
-        new_l[0..max_to_show + 1].to_vec()
-    } else {
-        new_l
-    }
-}
-
-fn display(permissions: bool, to_display: &Vec<&Node>) -> () {
-    if !permissions {
-        eprintln!("Did not have permissions for all directories");
-    }
-
-    display_node(to_display[0], &to_display, true, 1, "")
-}
-
-fn display_node<S: Into<String>>(
-    node_to_print: &Node,
-    to_display: &Vec<&Node>,
-    is_first: bool,
-    depth: u8,
-    indentation_str: S,
-) {
-    let mut is = indentation_str.into();
-    print_this_node(node_to_print, is_first, depth, is.as_ref());
-
-    is = is.replace("└─┬", "  ");
-    is = is.replace("└──", "  ");
-    is = is.replace("├──", "│ ");
-    is = is.replace("├─┬", "│ ");
-
-    let printable_node_slashes = node_to_print.dir.name.matches('/').count();
-
-    let mut num_siblings = to_display.iter().fold(0, |a, b| {
-        if node_to_print.children.contains(b)
-            && b.dir.name.matches('/').count() == printable_node_slashes + 1
-        {
-            a + 1
-        } else {
-            a
-        }
-    });
-
-    let mut is_biggest = true;
-    let mut has_display_children = false;
-    for node in to_display {
-        if node_to_print.children.contains(node) {
-            let has_children = node.children.len() > 0;
-            if node.dir.name.matches("/").count() == printable_node_slashes + 1 {
-                num_siblings -= 1;
-                for ref n in node.children.iter() {
-                    has_display_children = has_display_children || to_display.contains(n);
-                }
-                let has_children = has_children && has_display_children;
-                let tree_chars = {
-                    if num_siblings == 0 {
-                        if has_children {
-                            "└─┬"
-                        } else {
-                            "└──"
-                        }
-                    } else {
-                        if has_children {
-                            "├─┬"
-                        } else {
-                            "├──"
-                        }
-                    }
-                };
-                display_node(
-                    &node,
-                    to_display,
-                    is_biggest,
-                    depth + 1,
-                    is.to_string() + tree_chars,
-                );
-                is_biggest = false;
-            }
-        }
-    }
-}
-
-fn print_this_node(node_to_print: &Node, is_biggest: bool, depth: u8, indentation_str: &str) {
-    let padded_size = format!("{:>5}", human_readable_number(node_to_print.dir.size),);
-    println!(
-        "{} {} {}",
-        if is_biggest {
-            Fixed(196).paint(padded_size)
-        } else {
-            Fixed(7).paint(padded_size)
-        },
-        indentation_str,
-        Fixed(7)
-            .on(Fixed(cmp::min(8, (depth) as u8) + 231))
-            .paint(node_to_print.dir.name.to_string())
-    );
-}
-
-fn human_readable_number(size: u64) -> (String) {
-    let units = vec!["T", "G", "M", "K"]; //make static
-
-    //return format!("{}B", size);
-
-    for (i, u) in units.iter().enumerate() {
-        let marker = 1024u64.pow((units.len() - i) as u32);
-        if size >= marker {
-            if size / marker < 10 {
-                return format!("{:.1}{}", (size as f32 / marker as f32), u);
-            } else {
-                return format!("{}{}", (size / marker), u);
-            }
-        }
-    }
-    return format!("{}B", size);
-}
-
-mod tests {
-    #[allow(unused_imports)]
-    use super::*;
-
-    #[test]
-    fn test_human_readable_number() {
-        assert_eq!(human_readable_number(1), "1B");
-        assert_eq!(human_readable_number(956), "956B");
-        assert_eq!(human_readable_number(1004), "1004B");
-        assert_eq!(human_readable_number(1024), "1.0K");
-        assert_eq!(human_readable_number(1536), "1.5K");
-        assert_eq!(human_readable_number(1024 * 512), "512K");
-        assert_eq!(human_readable_number(1024 * 1024), "1.0M");
-        assert_eq!(human_readable_number(1024 * 1024 * 1024 - 1), "1023M");
-        assert_eq!(human_readable_number(1024 * 1024 * 1024 * 20), "20G");
-        assert_eq!(human_readable_number(1024 * 1024 * 1024 * 1024), "1.0T");
-    }
-}