Added __git_files completion

This adds the handling of ../, currently with at least these problems:
 - ../ only completes to ../.. if ../.git does not exist (until ..../.git does exist)
 - if etc/foo/bar was modified, and pwd is etc, git add will *only* complete to ../etc/foo/bar

1 files changed, 30 insertions, 0 deletions

diff --git a/etc/completions/__git_files b/etc/completions/__git_files
new file mode 100644
index 0000000..6b8c1dd
--- /dev/null
+++ b/etc/completions/__git_files
@@ -0,0 +1,30 @@
+#autoload +X
+local expl files ls_opts opts gitdir dirdiff i tmp
+
+zparseopts -D -E -a opts -- -cached -deleted -modified -others -ignored -unmerged -killed
+
+gitdir=$(_call_program gitdir git rev-parse --git-dir 2>/dev/null)
+__git_command_successful || return
+
+ls_opts=("--exclude-per-directory=.gitignore")
+[[ -f "$gitdir/info/exclude" ]] && ls_opts+="--exclude-from=$gitdir/info/exclude"
+
+files=(${(ps:\0:)"$(cd $gitdir/..; _call_program files git ls-files -z $ls_opts $opts 2>/dev/null)"})
+__git_command_successful || return
+
+if [[ ! -d .git ]] {
+	dirdiff=${PWD#${gitdir%/.git}}
+	repeat ${#${(s:/:)dirdiff}}; do
+		tmp+='../'
+	done
+	dirdiff=${dirdiff#/}
+	for (( i=1; i <= $#files; i++)) {
+		if [[ $files[$i] == $dirdiff/* ]] {
+			files[$i]=${files[$i]#$dirdiff/}
+		} else {
+			files[$i]=$tmp${files[$i]#$dirdiff/}
+		}
+	}
+}
+
+_wanted files expl 'index file' _multi_parts $@ - / files