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A modern replacement for ‘ls’.
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Benjamin Sago c911b5f6e4 Replace Cells with growable TextCells 
A recent change to ansi-term [1] means that `ANSIString`s can now hold either
owned *or* borrowed data (Rust calls this the Cow type). This means that we
can delay formatting ANSIStrings into ANSI-control-code-formatted strings
until it's absolutely necessary. The process for doing this was:

1. Replace the `Cell` type with a `TextCell` type that holds a vector of
   `ANSIString` values instead of a formatted string. It still does the
   width tracking.

2. Rework the details module's `render` functions to emit values of this
   type.

3. Similarly, rework the functions that produce cells containing filenames
   to use a `File` value's `name` field, which is an owned `String` that
   can now be re-used.

4. Update the printing, formatting, and width-calculating code in the
   details and grid-details views to produce a table by adding vectors
   together instead of adding strings together, delaying the formatting as
   long as it can.

This results in fewer allocations (as fewer `String` values are produced), and
makes the API tidier (as fewer `String` values are being passed around without
having their contents specified).

This also paves the way to Windows support, or at least support for
non-ANSI terminals: by delaying the time until strings are formatted,
it'll now be easier to change *how* they are formatted.

Casualties include:

- Bump to ansi_term v0.7.1, which impls `PartialEq` and `Debug` on
  `ANSIString`.
- The grid_details and lines views now need to take a vector of files, rather
  than a borrowed slice, so the filename cells produced now own the filename
  strings that get taken from files.
- Fixed the signature of `File#link_target` to specify that the
  file produced refers to the same directory, rather than some phantom
  directory with the same lifetime as the file. (This was wrong from the
  start, but it broke nothing until now)

References:

[1]: ansi-term@f6a6579ba8174de1cae64d181ec04af32ba2a4f0
2015-12-17 08:25:20 +08:00
contrib Replace missing man page fields 2015-11-19 13:21:31 +00:00
src Replace Cells with growable TextCells 2015-12-17 08:25:20 +08:00
.gitignore Add script to generate awkward testcases 2015-09-03 18:49:27 +01:00
.travis.yml Test on nightly, beta and stable 2015-11-04 11:29:29 +01:00
Cargo.lock Replace Cells with growable TextCells 2015-12-17 08:25:20 +08:00
Cargo.toml Replace Cells with growable TextCells 2015-12-17 08:25:20 +08:00
generate-testcases.sh Add script to generate awkward testcases 2015-09-03 18:49:27 +01:00
LICENCE Update LICENCE 2014-07-02 22:07:09 +01:00
Makefile Makefile: be compatible with BSD and OS X 2015-07-31 13:11:32 +08:00
README.md Update screenshots 2015-11-23 19:48:30 +00:00
screenshots.png Update screenshots 2015-11-23 19:48:30 +00:00

README.md

exa Build status

exa is a replacement for ls written in Rust.

Works on all recent Rust versions >= 1.4.0.

Screenshots

Screenshots of exa

Options

exa’s options are similar, but not exactly the same, as ls.

Display Options

  • -1, --oneline: display one entry per line
  • -G, --grid: display entries in a grid view (default)
  • -l, --long: display extended details and attributes
  • -R, --recurse: recurse into directories
  • -T, --tree: recurse into subdirectories in a tree view
  • -x, --across: sort multi-column view entries across
  • --color, --colour: when to colourise the output

Filtering Options

  • -a, --all: show dot files
  • -d, --list-dirs: list directories as regular files
  • -L, --level=(depth): maximum depth of recursion
  • -r, --reverse: reverse sort order
  • -s, --sort=(field): field to sort by
  • --group-directories-first: list directories before other files

Long View Options

These options are available when running with --long (-l):

  • -b, --binary: use binary (power of two) file sizes
  • -B, --bytes: list file sizes in bytes, without prefixes
  • -g, --group: show group as well as user
  • -h, --header: show a header row
  • -H, --links: show number of hard links column
  • -i, --inode: show inode number column
  • -m, --modified: display timestamp of most recent modification
  • -S, --blocks: show number of file system blocks
  • -t, --time=(field): which timestamp to show for a file
  • -u, --accessed: display timestamp of last access for a file
  • -U, --created: display timestamp of creation of a file
  • -@, --extended: display extended attribute keys and sizes
  • --git: show Git status for a file

Accepted --color options are always, automatic, and never. Valid sort fields are name, size, extension, modified, accessed, created, inode, and none. Valid time fields are modified, accessed, and created.

Installation

exa is written in Rust. Once you have it set up, a simple make install will compile exa and install it into /usr/local/bin.

exa depends on libgit2 for certain features. If you’re unable to compile libgit2, you can opt out of Git support by running cargo build --release --no-default-features.