Share dir_files between segments through Context (#16)

src/context.rs

@@ -1,30 +1,52 @@
 use clap::ArgMatches;
 use std::env;
+use std::fs;
 use std::path::PathBuf;
 
 pub struct Context<'a> {
     pub current_dir: PathBuf,
+    pub dir_files: Vec<PathBuf>,
     pub arguments: ArgMatches<'a>,
 }
 
 impl<'a> Context<'a> {
     pub fn new(arguments: ArgMatches) -> Context {
-        // TODO: Currently gets the physical directory. Get the logical directory.
         let current_dir = env::current_dir().expect("Unable to identify current directory.");
-
-        Context {
-            current_dir,
-            arguments,
-        }
+        Context::new_with_dir(arguments, current_dir)
     }
 
+    #[allow(dead_code)]
     pub fn new_with_dir<T>(arguments: ArgMatches, dir: T) -> Context
     where
         T: Into<PathBuf>,
     {
+        // TODO: Currently gets the physical directory. Get the logical directory.
+        let current_dir = Context::expand_tilde(dir.into());
+
+        let dir_files = fs::read_dir(&current_dir)
+            .unwrap_or_else(|_| {
+                panic!(
+                    "Unable to read current directory: {}",
+                    current_dir.to_string_lossy()
+                )
+            })
+            .filter_map(Result::ok)
+            .map(|entry| entry.path())
+            .collect::<Vec<PathBuf>>();
+
         Context {
-            current_dir: dir.into(),
+            current_dir,
             arguments,
+            dir_files,
         }
     }
+
+    /// Convert a `~` in a path to the home directory
+    fn expand_tilde(dir: PathBuf) -> PathBuf {
+        if dir.starts_with("~") {
+            let without_home = dir.strip_prefix("~").unwrap();
+            return dirs::home_dir().unwrap().join(without_home);
+        }
+        dir
+    }
 }

src/modules/directory.rs

@@ -17,7 +17,7 @@ use crate::context::Context;
 pub fn segment(context: &Context) -> Option<Segment> {
     const HOME_SYMBOL: &str = "~";
     const DIR_TRUNCATION_LENGTH: usize = 3;
-    const SECTION_COLOR: Color = Color::Cyan;
+    const SEGMENT_COLOR: Color = Color::Cyan;
 
     let mut segment = Segment::new("dir");
     let current_dir = &context.current_dir;
@@ -41,7 +41,7 @@ pub fn segment(context: &Context) -> Option<Segment> {
 
     segment
         .set_value(truncated_dir_string)
-        .set_style(SECTION_COLOR.bold());
+        .set_style(SEGMENT_COLOR.bold());
 
     Some(segment)
 }

src/modules/nodejs.rs

@@ -1,5 +1,5 @@
 use ansi_term::Color;
-use std::fs::{self, DirEntry};
+use std::path::PathBuf;
 use std::process::Command;
 
 use super::Segment;
@@ -9,46 +9,46 @@ use crate::context::Context;
 ///
 /// Will display the Node.js version if any of the following criteria are met:
 ///     - Current directory contains a `.js` file
-///     - Current directory contains a `node_modules` directory
 ///     - Current directory contains a `package.json` file
+///     - Current directory contains a `node_modules` directory
 pub fn segment(context: &Context) -> Option<Segment> {
-    const NODE_CHAR: &str = "⬢";
-    const SECTION_COLOR: Color = Color::Green;
-
-    let mut segment = Segment::new("node");
-    let current_dir = &context.current_dir;
-    let files = fs::read_dir(current_dir).unwrap();
-
-    // Early return if there are no JS project files
-    let is_js_project = files.filter_map(Result::ok).any(has_js_files);
+    let is_js_project = context.dir_files.iter().any(has_js_files);
     if !is_js_project {
         return None;
     }
 
-    match Command::new("node").arg("--version").output() {
-        Ok(output) => {
-            let version = String::from_utf8(output.stdout).unwrap();
-            segment.set_value(format!("{} {}", NODE_CHAR, version.trim()))
-        }
-        Err(_) => {
-            return None;
-        }
-    };
+    match get_node_version() {
+        Some(node_version) => {
+            const NODE_CHAR: &str = "⬢";
+            const SEGMENT_COLOR: Color = Color::Green;
 
-    segment.set_style(SECTION_COLOR);
-    Some(segment)
+            let mut segment = Segment::new("node");
+            segment.set_style(SEGMENT_COLOR);
+
+            let formatted_version = node_version.trim();
+            segment.set_value(format!("{} {}", NODE_CHAR, formatted_version));
+
+            Some(segment)
+        }
+        None => None,
+    }
 }
 
-fn has_js_files(dir_entry: DirEntry) -> bool {
-    let is_js_file = |d: &DirEntry| -> bool {
-        d.path().is_file() && d.path().extension().unwrap_or_default() == "js"
-    };
-    let is_node_modules = |d: &DirEntry| -> bool {
-        d.path().is_dir() && d.path().file_name().unwrap_or_default() == "node_modules"
-    };
-    let is_package_json = |d: &DirEntry| -> bool {
-        d.path().is_file() && d.path().file_name().unwrap_or_default() == "package.json"
+fn has_js_files(dir_entry: &PathBuf) -> bool {
+    let is_js_file =
+        |d: &PathBuf| -> bool { d.is_file() && d.extension().unwrap_or_default() == "js" };
+    let is_node_modules =
+        |d: &PathBuf| -> bool { d.is_dir() && d.file_name().unwrap_or_default() == "node_modules" };
+    let is_package_json = |d: &PathBuf| -> bool {
+        d.is_file() && d.file_name().unwrap_or_default() == "package.json"
     };
 
     is_js_file(&dir_entry) || is_node_modules(&dir_entry) || is_package_json(&dir_entry)
 }
+
+fn get_node_version() -> Option<String> {
+    match Command::new("node").arg("--version").output() {
+        Ok(output) => Some(String::from_utf8(output.stdout).unwrap()),
+        Err(_) => None,
+    }
+}

src/modules/rust.rs

@@ -1,30 +1,30 @@
 use super::Segment;
 use crate::context::Context;
 use ansi_term::Color;
-use std::fs::{self, DirEntry};
+use std::path::PathBuf;
 use std::process::Command;
 
 /// Creates a segment with the current Rust version
 ///
 /// Will display the Rust version if any of the following criteria are met:
-///     - Current directory contains a `.rs` or 'Cargo.toml' file
+///     - Current directory contains a `.rs` file
+///     - Current directory contains a `Cargo.toml` file
 pub fn segment(context: &Context) -> Option<Segment> {
-    let files = fs::read_dir(&context.current_dir).unwrap();
-    let is_rs_project = files.filter_map(Result::ok).any(has_rs_files);
+    let is_rs_project = context.dir_files.iter().any(has_rs_files);
     if !is_rs_project {
         return None;
     }
 
     match get_rust_version() {
         Some(rust_version) => {
-            const RUST_LOGO: &str = "🦀";
-            const SECTION_COLOR: Color = Color::Red;
+            const RUST_CHAR: &str = "🦀";
+            const SEGMENT_COLOR: Color = Color::Red;
 
             let mut segment = Segment::new("rust");
-            segment.set_style(SECTION_COLOR);
+            segment.set_style(SEGMENT_COLOR);
 
             let formatted_version = format_rustc_version(rust_version);
-            segment.set_value(format!("{} {}", RUST_LOGO, formatted_version));
+            segment.set_value(format!("{} {}", RUST_CHAR, formatted_version));
 
             Some(segment)
         }
@@ -32,13 +32,11 @@ pub fn segment(context: &Context) -> Option<Segment> {
     }
 }
 
-fn has_rs_files(dir_entry: DirEntry) -> bool {
-    let is_rs_file = |d: &DirEntry| -> bool {
-        d.path().is_file() && d.path().extension().unwrap_or_default() == "rs"
-    };
-    let is_cargo_toml = |d: &DirEntry| -> bool {
-        d.path().is_file() && d.path().file_name().unwrap_or_default() == "Cargo.toml"
-    };
+fn has_rs_files(dir_entry: &PathBuf) -> bool {
+    let is_rs_file =
+        |d: &PathBuf| -> bool { d.is_file() && d.extension().unwrap_or_default() == "rs" };
+    let is_cargo_toml =
+        |d: &PathBuf| -> bool { d.is_file() && d.file_name().unwrap_or_default() == "Cargo.toml" };
 
     is_rs_file(&dir_entry) || is_cargo_toml(&dir_entry)
 }