Subject: Re: _git-reset doesn't complete newly staged files
From: Daniel Shahaf <[email-masked]>
To: "Jun T." <[email-masked]>
Cc: [email-masked]
Date: Wed, 09 Mar 2016 23:33:18 +0000
List-Id: Zsh Workers List <zsh-workers.zsh.org>

Daniel Shahaf wrote on Wed, Mar 09, 2016 at 13:24:44 +0000:
> Jun T. wrote on Mon, Mar 07, 2016 at 12:16:54 +0900:
> > In the case of
> > 
> > % git reset commit <TAB>    # commit is not HEAD
> > 
> > I have no idea what to do, so I just added __git_ignore_line
> > to the original code. 
> 
> I think you're looking for «git diff-index --cached -z --name-only
> $treeish».

Turns out there was already a helper function that did almost exactly
that, so we can just reuse it.  Patch attached.

I took the liberty of changing the tag and description you used, since
"staged files" isn't exactly right for this syntax: files that are in
$treeish but not staged may also be completed.

WDYT?

Thanks,

Daniel
>From 92fcd0ed18f4c0122f7cdda7930979cd624a33cd Mon Sep 17 00:00:00 2001
From: Daniel Shahaf <[email-masked]>
Date: Wed, 9 Mar 2016 22:11:22 +0000
Subject: [PATCH] NNNNN (after 38074): _git reset $treeish: complete only
 staged files

---
 Completion/Unix/Command/_git | 56 ++++++++++++++++----------------------------
 1 file changed, 20 insertions(+), 36 deletions(-)

diff --git a/Completion/Unix/Command/_git b/Completion/Unix/Command/_git
index 2dd9a80..b1a7431 100644
--- a/Completion/Unix/Command/_git
+++ b/Completion/Unix/Command/_git
@@ -1373,16 +1373,11 @@ _git-reset () {
 
   case $state in
     (file)
-      local commit=HEAD
-      if [[ -n $line[1] ]] && __git_is_committish $line[1]; then
-        commit=$line[1]
+      local tree=HEAD
+      if [[ -n $line[1] ]] && __git_is_treeish $line[1]; then
+        tree=$line[1]
       fi
-      if [[ $commit == HEAD ]]; then
-	__git_ignore_line __git_staged_files && ret=0
-      else
-	__git_ignore_line __git_tree_files ${PREFIX:-.} $commit && ret=0
-      fi
-      ;;
+      __git_ignore_line __git_treeish-to-index_files $tree && ret=0
   esac
 
   return ret
@@ -6077,16 +6072,28 @@ __git_killed_files () {
   __git_files --killed killed-files 'killed file' $*
 }
 
-(( $+functions[__git_changed-in-index_files] )) ||
-__git_changed-in-index_files () {
+(( $+functions[__git_diff-index_files] )) ||
+__git_diff-index_files () {
+  local tree=$1 description=$2 tag=$3; shift 3
   local files expl
 
-  files=$(_call_program files git diff-index -z --name-only --no-color --cached HEAD 2>/dev/null)
+  files=$(_call_program files git diff-index -z --name-only --no-color --cached $tree 2>/dev/null)
   __git_command_successful $pipestatus || return 1
   files=(${(0)"$(__git_files_relative $files)"})
   __git_command_successful $pipestatus || return 1
 
-  _wanted changed-in-index-files expl 'changed in index file' _multi_parts $@ - / files
+  _wanted $tag expl $description _multi_parts $@ - / files
+}
+
+(( $+functions[__git_changed-in-index_files] )) ||
+__git_changed-in-index_files () {
+  __git_diff-index_files HEAD 'changed in index file' changed-in-index-files "$@"
+}
+
+(( $+functions[__git_treeish-to-index_files] )) ||
+__git_treeish-to-index_files () {
+  local tree=$1; shift
+  __git_diff-index_files $tree "files different between ${(qq)tree} and the index" treeish-to-index-files "$@"
 }
 
 (( $+functions[__git_changed-in-working-tree_files] )) ||
@@ -6145,29 +6152,6 @@ __git_tree_files () {
   _wanted files expl 'tree file' _multi_parts -f $compadd_opts -- / tree_files
 }
 
-(( $+functions[__git_staged_files] )) ||
-__git_staged_files () {
-  local -a slist staged_files
-  local item expl i
-
-  slist=(${(0)"$(_call_program staged-files git status -z -uno 2>/dev/null)"})
-  __git_command_successful $pipestatus || return 1
-
-  for (( i = 1; i <= $#slist; ++i )) do
-    item=$slist[i]
-    if [[ $item == (DD|AA|U|?U)* ]]; then
-      continue	  #XXX skip unmerged files
-    elif [[ $item == R* ]]; then
-      staged_files+=( $item[4,-1] $slist[++i] )
-    elif [[ $item == [ACDM]* ]]; then
-      staged_files+=( $item[4,-1] )
-    fi
-  done
-  staged_files=( ${(0)"$(__git_files_relative ${(pj:\0:)staged_files})"} )
-
-  _wanted staged-files expl 'staged file' compadd "$@" -a - staged_files
-}
-
 # Repository Argument Types
 
 (( $+functions[__git_remote_repositories] )) ||