Re: Mergetool generating blank files (1.5.3)

["Kelvie Wong" <kelvie@ieee.org>]

On 9/27/07, Junio C Hamano <gitster@pobox.com> wrote:
> When mergetool is run from a subdirectory, "ls-files -u" nicely
> limits the output to conflicted files in that directory, but
> we need to give the full path to cat-file plumbing to grab the
> contents of stages.
>
> Signed-off-by: Junio C Hamano <gitster@pobox.com>
> ---
>
>  * I earlier sent one with cd_to_toplevel but I think the
>    approach in this patch is nicer.
>
>  git-mergetool.sh |    7 ++++---
>  1 files changed, 4 insertions(+), 3 deletions(-)
>
> diff --git a/git-mergetool.sh b/git-mergetool.sh
> index a0e44f7..3b1ec13 100755
> --- a/git-mergetool.sh
> +++ b/git-mergetool.sh
> @@ -12,6 +12,7 @@ USAGE='[--tool=tool] [file to merge] ...'
>  SUBDIRECTORY_OK=Yes
>  . git-sh-setup
>  require_work_tree
> +prefix=$(git rev-parse --show-prefix)
>
>  # Returns true if the mode reflects a symlink
>  is_symlink () {
> @@ -162,9 +163,9 @@ merge_file () {
>      local_mode=`git ls-files -u -- "$path" | awk '{if ($3==2) print $1;}'`
>      remote_mode=`git ls-files -u -- "$path" | awk '{if ($3==3) print $1;}'`
>
> -    base_present   && git cat-file blob ":1:$path" > "$BASE" 2>/dev/null
> -    local_present  && git cat-file blob ":2:$path" > "$LOCAL" 2>/dev/null
> -    remote_present && git cat-file blob ":3:$path" > "$REMOTE" 2>/dev/null
> +    base_present   && git cat-file blob ":1:$prefix$path" >"$BASE" 2>/dev/null
> +    local_present  && git cat-file blob ":2:$prefix$path" >"$LOCAL" 2>/dev/null
> +    remote_present && git cat-file blob ":3:$prefix$path" >"$REMOTE" 2>/dev/null
>
>      if test -z "$local_mode" -o -z "$remote_mode"; then
>         echo "Deleted merge conflict for '$path':"
>

--- a/git-mergetool       2007-09-24 09:08:23.000000000 -0700
+++ b/git-mergetool        2007-09-27 15:04:15.000000000 -0700
@@ -12,6 +12,7 @@
 SUBDIRECTORY_OK=Yes
 . git-sh-setup
 require_work_tree
+prefix=$(git rev-parse --show-prefix)

 # Returns true if the mode reflects a symlink
 is_symlink () {
@@ -162,9 +163,9 @@
     local_mode=`git ls-files -u -- "$path" | awk '{if ($3==2) print $1;}'`
     remote_mode=`git ls-files -u -- "$path" | awk '{if ($3==3) print $1;}'`

-    base_present   && git cat-file blob ":1:$path" > "$BASE" 2>/dev/null
-    local_present  && git cat-file blob ":2:$path" > "$LOCAL" 2>/dev/null
-    remote_present && git cat-file blob ":3:$path" > "$REMOTE" 2>/dev/null
+    base_present   && git cat-file blob ":1:$prefix$path" > "$BASE" 2>/dev/null
+    local_present  && git cat-file blob ":2:$prefix$path" > "$LOCAL"
2>/dev/null
+    remote_present && git cat-file blob ":3:$prefix$path" > "$REMOTE"
2>/dev/null

     if test -z "$local_mode" -o -z "$remote_mode"; then
        echo "Deleted merge conflict for '$path':"
@@ -251,7 +252,7 @@
            ;;
        emerge)
            if base_present ; then
-               emacs -f emerge-files-with-ancestor-command "$LOCAL"
"$REMOTE" "$BASE" "$path"
+               emacs -f emerge-files-with-ancestor-command "$LOCAL"
"$REMOTE" "$BASE" "$(basename "$path")"
            else
                emacs -f emerge-files-command "$LOCAL" "$REMOTE"
"$(basename "$path")"
            fi



Finally got it to work.  emacs (at least the version I'm using,
22.1.1) seems to set the $PWD via its first argument, that is,
$LOCAL's directory, and when it goes to save, it tries to save $path
on top of that.

The updated patch above would be just to use the basename, that is, if
it is certain that $LOCAL and $path will always reside in the same
directory -- and I believe, but am not certain, that this is the case.

Also, I am not sure if this is specific to my version of Emacs, so
perhaps some further testing is required.

-- 
Kelvie