* ls: Implement --zero flag. (#2929)
This flag can be used to provide a easy machine parseable output from
ls, as discussed in the GNU bug report
https://debbugs.gnu.org/cgi/bugreport.cgi?bug=49716.
There are some peculiarities with this flag:
- Current implementation of GNU ls of the `--zero` flag implies some
other flags. Those can be overridden by setting those flags after
`--zero` in the command line.
- This flag is not compatible with `--dired`. This patch is not 100%
compliant with GNU ls: GNU ls `--zero` will fail if `--dired` and
`-l` are set, while with this patch only `--dired` is needed for the
command to fail.
We also add `--dired` flag to the parser, with no additional behaviour
change.
Testing done:
```
$ bash util/build-gnu.sh
[...]
$ bash util/run-gnu-test.sh tests/ls/zero-option.sh
[...]
PASS: tests/ls/zero-option.sh
============================================================================
Testsuite summary for GNU coreutils 9.1.36-8ec11
============================================================================
# TOTAL: 1
# PASS: 1
# SKIP: 0
# XFAIL: 0
# FAIL: 0
# XPASS: 0
# ERROR: 0
============================================================================
```
* Use the US way to spell Behavior
* Fix formatting with cargo fmt -- tests/by-util/test_ls.rs
* Simplify --zero flag overriding logic by using index_of
Also, allow multiple --zero flags, as this is possible with GNU ls
command. Only the last one is taken into account.
Co-authored-by: Sylvestre Ledru <sledru@mozilla.com>
* ls: handle looping symlinks infinite printing
* ls: better coloring and printing symlinks when dereferenced
* tests/ls: add dereferencing and symlink loop tests
* ls: reformat changed using rustfmt
* ls: follow clippy advice for cleaner code
* uucore/fs: fix FileInformation to open directory handles in Windows as
well
* ls: add new optional arguments to --classify flag
The --classify flag in ls now takes an option when argument
that may have the values always, auto and none.
Modified clap argument to allow an optional parameter and
changed the classify flag value parsing logic to account for
this change.
* ls: add test for indicator-style, ind and classify with value none
* ls: require option paramter to --classify to use a = to specify flag value
* ls: account for all the undocumented possible values for the --classify flag
Added the other values for the --classify flag along with modifications to tests.
Also documented the inconsistency between GNU coreutils because we accept the
flag value even for the short version of the flag.
