Use "context" to contain run details (#14)

* Create "context" to contain run details

* Use context in tests and benchmarks

src/context.rs

@@ -0,0 +1,30 @@
+use clap::ArgMatches;
+use std::env;
+use std::path::PathBuf;
+
+pub struct Context<'a> {
+    pub current_dir: 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,
+        }
+    }
+
+    pub fn new_with_dir<T>(arguments: ArgMatches, dir: T) -> Context
+    where
+        T: Into<PathBuf>,
+    {
+        Context {
+            current_dir: dir.into(),
+            arguments,
+        }
+    }
+}

src/lib.rs

@@ -1,4 +1,5 @@
 // Lib is present to allow for benchmarking
+pub mod context;
 pub mod modules;
 pub mod print;
 pub mod segment;

src/main.rs

@@ -5,6 +5,7 @@ extern crate ansi_term;
 extern crate dirs;
 extern crate git2;
 
+mod context;
 mod modules;
 mod print;
 mod segment;

src/modules/character.rs

@@ -1,7 +1,7 @@
-use super::Segment;
 use ansi_term::Color;
-use clap::ArgMatches;
-use std::path::Path;
+
+use super::Segment;
+use crate::context::Context;
 
 /// Creates a segment for the prompt character
 ///
@@ -11,14 +11,15 @@ use std::path::Path;
 /// (green by default)
 /// - If the exit-code was anything else, the arrow will be formatted with
 /// `COLOR_FAILURE` (red by default)
-pub fn segment(_current_dir: &Path, args: &ArgMatches) -> Option<Segment> {
+pub fn segment(context: &Context) -> Option<Segment> {
     const PROMPT_CHAR: &str = "➜";
     const COLOR_SUCCESS: Color = Color::Green;
     const COLOR_FAILURE: Color = Color::Red;
 
     let mut segment = Segment::new("char");
+    let arguments = &context.arguments;
 
-    if args.value_of("status_code").unwrap() == "0" {
+    if arguments.value_of("status_code").unwrap() == "0" {
         segment.set_style(COLOR_SUCCESS);
     } else {
         segment.set_style(COLOR_FAILURE);

src/modules/directory.rs

@@ -1,10 +1,10 @@
-use super::Segment;
 use ansi_term::Color;
-use clap::ArgMatches;
-use dirs;
 use git2::Repository;
 use std::path::Path;
 
+use super::Segment;
+use crate::context::Context;
+
 /// Creates a segment with the current directory
 ///
 /// Will perform path contraction and truncation.
@@ -14,12 +14,13 @@ use std::path::Path;
 ///
 /// **Truncation**
 /// Paths will be limited in length to `3` path components by default.
-pub fn segment(current_dir: &Path, _args: &ArgMatches) -> Option<Segment> {
+pub fn segment(context: &Context) -> Option<Segment> {
     const HOME_SYMBOL: &str = "~";
     const DIR_TRUNCATION_LENGTH: usize = 3;
     const SECTION_COLOR: Color = Color::Cyan;
 
     let mut segment = Segment::new("dir");
+    let current_dir = &context.current_dir;
 
     let dir_string;
     if let Ok(repo) = git2::Repository::discover(current_dir) {

src/modules/line_break.rs

@@ -1,9 +1,8 @@
 use super::Segment;
-use clap::ArgMatches;
-use std::path::Path;
+use crate::context::Context;
 
 /// Creates a segment for the line break
-pub fn segment(_current_dir: &Path, _args: &ArgMatches) -> Option<Segment> {
+pub fn segment(_context: &Context) -> Option<Segment> {
     const LINE_ENDING: &str = "\n";
 
     let mut segment = Segment::new("line_break");

src/modules/mod.rs

@@ -3,16 +3,15 @@ mod directory;
 mod line_break;
 mod nodejs;
 
+use crate::context::Context;
 use crate::segment::Segment;
-use clap::ArgMatches;
-use std::path::Path;
 
-pub fn handle(module: &str, current_dir: &Path, args: &ArgMatches) -> Option<Segment> {
+pub fn handle(module: &str, context: &Context) -> Option<Segment> {
     match module {
-        "dir" | "directory" => directory::segment(current_dir, args),
-        "char" | "character" => character::segment(current_dir, args),
-        "node" | "nodejs" => nodejs::segment(current_dir, args),
-        "line_break" => line_break::segment(current_dir, args),
+        "dir" | "directory" => directory::segment(context),
+        "char" | "character" => character::segment(context),
+        "node" | "nodejs" => nodejs::segment(context),
+        "line_break" => line_break::segment(context),
 
         _ => panic!("Unknown module: {}", module),
     }

src/modules/nodejs.rs

@@ -1,21 +1,22 @@
-use super::Segment;
 use ansi_term::Color;
-use clap::ArgMatches;
 use std::fs::{self, DirEntry};
-use std::path::Path;
 use std::process::Command;
 
+use super::Segment;
+use crate::context::Context;
+
 /// Creates a segment with the current Node.js version
 ///
 /// 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
-pub fn segment(current_dir: &Path, _args: &ArgMatches) -> Option<Segment> {
+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

src/print.rs

@@ -1,14 +1,12 @@
 use clap::ArgMatches;
-use std::env;
 use std::io::{self, Write};
 
+use crate::context::Context;
 use crate::modules;
 
 pub fn prompt(args: ArgMatches) {
-    let default_prompt = vec!["directory", "nodejs", "line_break", "character"];
-
-    // TODO: Currently gets the physical directory. Get the logical directory.
-    let current_path = env::current_dir().expect("Unable to identify current directory.");
+    let prompt_order = vec!["directory", "nodejs", "line_break", "character"];
+    let context = Context::new(args);
 
     // TODO:
     // - List files in directory
@@ -20,9 +18,9 @@ pub fn prompt(args: ArgMatches) {
     // Write a new line before the prompt
     writeln!(handle).unwrap();
 
-    default_prompt
+    prompt_order
         .iter()
-        .map(|module| modules::handle(module, &current_path, &args)) // Compute segments
+        .map(|module| modules::handle(module, &context)) // Compute segments
         .flatten() // Remove segments set to `None`
         .enumerate() // Turn segment into tuple with index
         .map(|(index, segment)| segment.output_index(index)) // Generate string outputs