cli: add -. as short option for --hidden

This is somewhat non-standard, but it seems nice on the surface: short
flag names are in short supply, --hidden is probably somewhat common and
-. has an obvious connection with how hidden files are named on Unix.

Closes #1680

CHANGELOG.md

@@ -2,6 +2,8 @@ TBD
 ===
 Unreleased changes. Release notes have not yet been written.
 
+**BREAKING CHANGES**:
+
 In this release, a small tweak has been made to the output format when a binary
 file is detected. Previously, it looked like this:
 
@@ -31,6 +33,8 @@ Feature enhancements:
   minified files, Mint, pofiles (from GNU gettext) Racket, VCL, Yang
 * [FEATURE #1404](https://github.com/BurntSushi/ripgrep/pull/1404):
   ripgrep now prints a warning if nothing is searched.
+* [FEATURE #1680](https://github.com/BurntSushi/ripgrep/pull/1680):
+  Add `-.` as a short flag alias for `--hidden`.
 * [FEATURE #1856](https://github.com/BurntSushi/ripgrep/pull/1856):
   The README now links to a
   [Spanish translation](https://github.com/UltiRequiem/traducciones/tree/master/ripgrep).

ci/test-complete

@@ -44,8 +44,8 @@ main() {
     # Occasionally we may have to handle some manually, however
     help_args=( ${(f)"$(
         $rg --help |
-        $rg -i -- '^\s+--?[a-z0-9]|--[a-z]' |
+        $rg -i -- '^\s+--?[a-z0-9.]|--[a-z]' |
-        $rg -ior '$1' -- $'[\t /\"\'`.,](-[a-z0-9]|--[a-z0-9-]+)\\b' |
+        $rg -ior '$1' -- $'[\t /\"\'`.,](-[a-z0-9.]|--[a-z0-9-]+)(,|\\b)' |
         $rg -v -- --print0 | # False positives
         sort -u
     )"} )

complete/_rg

@@ -121,7 +121,7 @@ _rg() {
     "(pretty-vimgrep)--no-heading[don't show matches grouped by file name]"
 
     + '(hidden)' # Hidden-file options
-    '--hidden[search hidden files and directories]'
+    {-.,--hidden}'[search hidden files and directories]'
     $no"--no-hidden[don't search hidden files and directories]"
 
     + '(hybrid)' # hybrid regex options

crates/core/app.rs

@@ -1452,6 +1452,7 @@ This flag can be disabled with --no-hidden.
 "
     );
     let arg = RGArg::switch("hidden")
+        .short(".")
         .help(SHORT)
         .long_help(LONG)
         .overrides("no-hidden");
@@ -1987,7 +1988,7 @@ fn flag_no_ignore_dot(args: &mut Vec<RGArg>) {
 Don't respect .ignore files.
 
 This does *not* affect whether ripgrep will ignore files and directories
-whose names begin with a dot. For that, see --hidden.
+whose names begin with a dot. For that, see the -./--hidden flag.
 
 This flag can be disabled with the --ignore-dot flag.
 "
@@ -2360,7 +2361,7 @@ the empty string. For example, if you are searching using 'rg foo' then using
 occurrences of 'foo' will be highlighted. This flag enables the same behavior
 without needing to modify the pattern.
 
-This overrides the --context, --after-context and --before context flags.
+This overrides the --context, --after-context and --before-context flags.
 "
     );
     let arg = RGArg::switch("passthru")
@@ -2990,8 +2991,8 @@ fn flag_unrestricted(args: &mut Vec<RGArg>) {
         "\
 Reduce the level of \"smart\" searching. A single -u won't respect .gitignore
 (etc.) files (--no-ignore). Two -u flags will additionally search hidden files
-and directories (--hidden). Three -u flags will additionally search binary files
+and directories (-./--hidden). Three -u flags will additionally search binary
-(--binary).
+files (--binary).
 
 'rg -uuu' is roughly equivalent to 'grep -r'.
 "

doc/rg.1.txt.tpl

@@ -166,7 +166,7 @@ Each of the types of filtering can be configured via command line flags:
     * There are several flags starting with '--no-ignore' that toggle which,
       if any, ignore rules are respected. '--no-ignore' by itself will disable
       all of them.
-    * '--hidden' will force ripgrep to search hidden files and directories.
+    * '-./--hidden' will force ripgrep to search hidden files and directories.
     * '--binary' will force ripgrep to search binary files.
     * '-L/--follow' will force ripgrep to follow symlinks.