applypatch: use "index" lines not "applies-to".

This matches the 3-way fallback used by applypatch to use
per-blob "index" lines, not "applies-to" tree object name, to
match what git-am does.

Signed-off-by: Junio C Hamano <junkio@cox.net>

diff --git a/git-applypatch.sh b/git-applypatch.sh
index f054996..4c577eb 100755 (executable)
--- a/git-applypatch.sh
+++ b/git-applypatch.sh
@@ -120,26 +120,36 @@ git-apply --index "$PATCHFILE" || {
        O_OBJECT=`cd "$GIT_OBJECT_DIRECTORY" && pwd`
        rm -fr .patch-merge-*
 
+       if git-apply -z --index-info "$PATCHFILE" \
+               >.patch-merge-index-info 2>/dev/null &&
+               GIT_INDEX_FILE=.patch-merge-tmp-index \
+               git-update-index -z --index-info <.patch-merge-index-info &&
+               GIT_INDEX_FILE=.patch-merge-tmp-index \
+               git-write-tree >.patch-merge-tmp-base &&
+               (
+                       mkdir .patch-merge-tmp-dir &&
+                       cd .patch-merge-tmp-dir &&
+                       GIT_INDEX_FILE="../.patch-merge-tmp-index" \
+                       GIT_OBJECT_DIRECTORY="$O_OBJECT" \
+                       git-apply $binary --index
+               ) <"$PATCHFILE"
+       then
+               echo Using index info to reconstruct a base tree...
+               mv .patch-merge-tmp-base .patch-merge-base
+               mv .patch-merge-tmp-index .patch-merge-index
+       else
        (
                N=10
 
-               # if the patch records the base tree...
-               sed -ne '
-                       /^diff /q
-                       /^applies-to: \([0-9a-f]*\)$/{
-                               s//\1/p
-                               q
-                       }
-               ' "$PATCHFILE"
-
-               # or hoping the patch is against our recent commits...
+               # Otherwise, try nearby trees that can be used to apply the
+               # patch.
                git-rev-list --max-count=$N HEAD
 
                # or hoping the patch is against known tags...
                git-ls-remote --tags .
        ) |
-       while read base junk
-       do
+           while read base junk
+           do
                # Try it if we have it as a tree.
                git-cat-file tree "$base" >/dev/null 2>&1 || continue
 
@@ -155,7 +165,8 @@ git-apply --index "$PATCHFILE" || {
                        mv ../.patch-merge-tmp-index ../.patch-merge-index &&
                        echo "$base" >../.patch-merge-base
                ) <"$PATCHFILE"  2>/dev/null && break
-       done
+           done
+       fi
 
        test -f .patch-merge-index &&
        his_tree=$(GIT_INDEX_FILE=.patch-merge-index git-write-tree) &&