Use git2 instead of parsing .gitignore for --git-ignore

Fix #636

Author: ariasuni

src/exa.rs

@@ -11,7 +11,6 @@ use ansi_term::{ANSIStrings, Style};
 use log::debug;
 
 use crate::fs::{Dir, File};
-use crate::fs::feature::ignore::IgnoreCache;
 use crate::fs::feature::git::GitCache;
 use crate::options::{Options, Vars};
 pub use crate::options::vars;
@@ -44,10 +43,6 @@ pub struct Exa<'args, 'w, W: Write + 'w> {
     /// This has to last the lifetime of the program, because the user might
     /// want to list several directories in the same repository.
     pub git: Option<GitCache>,
-
-    /// A cache of git-ignored files.
-    /// This lasts the lifetime of the program too, for the same reason.
-    pub ignore: Option<IgnoreCache>,
 }
 
 /// The “real” environment variables type.
@@ -71,15 +66,6 @@ fn git_options(options: &Options, args: &[&OsStr]) -> Option<GitCache> {
     }
 }
 
-fn ignore_cache(options: &Options) -> Option<IgnoreCache> {
-    use crate::fs::filter::GitIgnore;
-
-    match options.filter.git_ignore {
-        GitIgnore::CheckAndIgnore => Some(IgnoreCache::new()),
-        GitIgnore::Off            => None,
-    }
-}
-
 impl<'args, 'w, W: Write + 'w> Exa<'args, 'w, W> {
     pub fn from_args<I>(args: I, writer: &'w mut W) -> Result<Exa<'args, 'w, W>, Misfire>
     where I: Iterator<Item=&'args OsString> {
@@ -95,8 +81,7 @@ impl<'args, 'w, W: Write + 'w> Exa<'args, 'w, W> {
             }
 
             let git = git_options(&options, &args);
-            let ignore = ignore_cache(&options);
-            Exa { options, writer, args, git, ignore }
+            Exa { options, writer, args, git }
         })
     }
 
@@ -157,7 +142,7 @@ impl<'args, 'w, W: Write + 'w> Exa<'args, 'w, W> {
             }
 
             let mut children = Vec::new();
-            for file in dir.files(self.options.filter.dot_filter, self.ignore.as_ref()) {
+            for file in dir.files(self.options.filter.dot_filter, self.git.as_ref()) {
                 match file {
                     Ok(file)       => children.push(file),
                     Err((path, e)) => writeln!(stderr(), "[{}: {}]", path.display(), e)?,
@@ -217,7 +202,7 @@ impl<'args, 'w, W: Write + 'w> Exa<'args, 'w, W> {
                     let recurse = self.options.dir_action.recurse_options();
 
                     let r = details::Render { dir, files, colours, style, opts, filter, recurse };
-                    r.render(self.git.as_ref(), self.ignore.as_ref(), self.writer)
+                    r.render(self.git.as_ref(), self.writer)
                 }
 
                 Mode::GridDetails(ref opts) => {

src/fs/dir.rs

@@ -1,3 +1,5 @@
+use crate::fs::feature::git::GitCache;
+use crate::fs::fields::GitStatus;
 use std::io::{self, Result as IOResult};
 use std::fs;
 use std::path::{Path, PathBuf};
@@ -6,7 +8,6 @@ use std::slice::Iter as SliceIter;
 use log::info;
 
 use crate::fs::File;
-use crate::fs::feature::ignore::IgnoreCache;
 
 
 /// A **Dir** provides a cached list of the file paths in a directory that's
@@ -46,15 +47,13 @@ impl Dir {
 
     /// Produce an iterator of IO results of trying to read all the files in
     /// this directory.
-    pub fn files<'dir, 'ig>(&'dir self, dots: DotFilter, ignore: Option<&'ig IgnoreCache>) -> Files<'dir, 'ig> {
-        if let Some(i) = ignore { i.discover_underneath(&self.path); }
-
+    pub fn files<'dir, 'ig>(&'dir self, dots: DotFilter, git: Option<&'ig GitCache>) -> Files<'dir, 'ig> {
         Files {
             inner:     self.contents.iter(),
             dir:       self,
             dotfiles:  dots.shows_dotfiles(),
             dots:      dots.dots(),
-            ignore,
+            git,
         }
     }
 
@@ -86,7 +85,7 @@ pub struct Files<'dir, 'ig> {
     /// any files have been listed.
     dots: DotsNext,
 
-    ignore: Option<&'ig IgnoreCache>,
+    git: Option<&'ig GitCache>,
 }
 
 impl<'dir, 'ig> Files<'dir, 'ig> {
@@ -107,8 +106,9 @@ impl<'dir, 'ig> Files<'dir, 'ig> {
                 let filename = File::filename(path);
                 if !self.dotfiles && filename.starts_with('.') { continue }
 
-                if let Some(i) = self.ignore {
-                    if i.is_ignored(path) { continue }
+                let git_status = self.git.map(|g| g.get(path, false)).unwrap_or_default();
+                if git_status.unstaged == GitStatus::Ignored {
+                     continue;
                 }
 
                 return Some(File::from_args(path.clone(), self.dir, filename)

src/fs/feature/ignore.rs

@@ -1,5 +1,4 @@
 pub mod xattr;
-pub mod ignore;
 
 #[cfg(feature="git")] pub mod git;
 

src/fs/feature/mod.rs

@@ -177,6 +177,7 @@ pub struct Time {
 /// A file’s status in a Git repository. Whether a file is in a repository or
 /// not is handled by the Git module, rather than having a “null” variant in
 /// this enum.
+#[derive(PartialEq)]
 pub enum GitStatus {
 
     /// This file hasn’t changed since the last commit.

src/fs/fields.rs

@@ -72,7 +72,7 @@
 use std::ffi::{OsStr, OsString};
 
 use crate::fs::dir_action::DirAction;
-use crate::fs::filter::FileFilter;
+use crate::fs::filter::{FileFilter,GitIgnore};
 use crate::output::{View, Mode, details, grid_details};
 
 mod style;
@@ -146,6 +146,10 @@ impl Options {
     /// status column. It’s only worth trying to discover a repository if the
     /// results will end up being displayed.
     pub fn should_scan_for_git(&self) -> bool {
+        if self.filter.git_ignore == GitIgnore::CheckAndIgnore {
+            return true;
+        }
+
         match self.view.mode {
             Mode::Details(details::Options { table: Some(ref table), .. }) |
             Mode::GridDetails(grid_details::Options { details: details::Options { table: Some(ref table), .. }, .. }) => table.columns.git,