chore(git-all): improve python and shell versions

snippets/git.fish

@@ -0,0 +1,19 @@
+#!/usr/bin/env fish
+
+function git-all
+	if ! which -s parallel
+		echo "GNU parallel not found" >&2
+		return
+	end
+
+	argparse -s 'c/command=' 'p/path=+' 'r/recursive' -- $argv
+	or return
+
+	if test "$_flag_recursive" = '-r' || test "$_flag_recursive" = '--recursive'
+		set repositories (find $_flag_path -type 'd' -name '.git' -exec dirname {} +)
+	else
+		set repositories $_flag_path
+	end
+
+	parallel --color-failed --tagstring "{/}" "git -C {} $_flag_command" ::: $repositories
+end