[PATCH 2 of 2] completion: selectively use debugpathcomplete in bash_completion

[Bryan O'Sullivan]

# HG changeset patch
# User Bryan O'Sullivan <bryano at fb.com>
# Date 1363889832 25200
# Node ID 03374a7a43c726bb80417bfbb9e6a184139221ee
# Parent  d91fe1c607511dc57cb51e557229c243908a6b39
completion: selectively use debugpathcomplete in bash_completion

The current bash_completion code can be very slow in a large working
directory. It always uses "hg status" to generate possibly matching
files, which checks the status of every file. We often don't care
about status when completing, so that cost is very high.

As the new debugpathcomplete command does not check the status of
files, it offers much better performance for commands that only
care about completing names.

diff --git a/contrib/bash_completion b/contrib/bash_completion
--- a/contrib/bash_completion
+++ b/contrib/bash_completion
@@ -80,6 +80,14 @@ shopt -s extglob
     done
 }
 
+_hg_debugpathcomplete()
+{
+    local files="$(_hg_cmd debugpathcomplete $1 "$cur")"
+    local IFS=$'\n'
+    compopt -o filenames 2>/dev/null
+    COMPREPLY=(${COMPREPLY[@]:-} $(compgen -W '$files' -- "$cur"))
+}
+
 _hg_status()
 {
     local files="$(_hg_cmd status -n$1 "glob:$cur**")"
@@ -241,16 +249,16 @@ shopt -s extglob
 	    _hg_status "mar"
 	;;
 	remove)
-	    _hg_status "mcd"
+	    _hg_debugpathcomplete -n
 	;;
 	forget)
-	    _hg_status "a"
+	    _hg_debugpathcomplete -fa
 	;;
 	diff)
 	    _hg_status "mar"
 	;;
 	revert)
-	    _hg_status "mard"
+	    _hg_debugpathcomplete
 	;;
 	clone)
 	    local count=$(_hg_count_non_option)