Log ref changes made by git-merge and git-pull.

When git-merge updates HEAD as a result of a merge record what
happened during the merge into the reflog associated with HEAD
(if any).  The log reports who caused the update (git-merge or
git-pull, by invoking git-merge), what the remote ref names were
and the type of merge process used.

The merge information can be useful when reviewing a reflog for
a branch such as `master` where fast forward and trivial in index
merges might be common as the user tracks an upstream.

Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
Signed-off-by: Junio C Hamano <junkio@cox.net>

diff --git a/git-merge.sh b/git-merge.sh
index 24e3b507ef1f907e7146a2653189f45a92db08fd..a9cfafb1dfba6e85834a33caf6b3c69910594bf6 100755 (executable)
--- a/git-merge.sh
+++ b/git-merge.sh
@@ -58,7 +58,13 @@ squash_message () {
 }
 
 finish () {
-       test '' = "$2" || echo "$2"
+       if test '' = "$2"
+       then
+               rlogm="$rloga"
+       else
+               echo "$2"
+               rlogm="$rloga: $2"
+       fi
        case "$squash" in
        t)
                echo "Squash commit -- not updating HEAD"
@@ -70,7 +76,7 @@ finish () {
                        echo "No merge message -- not updating HEAD"
                        ;;
                *)
-                       git-update-ref HEAD "$1" "$head" || exit 1
+                       git-update-ref -m "$rlogm" HEAD "$1" "$head" || exit 1
                        ;;
                esac
                ;;
@@ -88,6 +94,7 @@ finish () {
        esac
 }
 
+rloga=
 while case "$#" in 0) break ;; esac
 do
        case "$1" in
@@ -117,6 +124,9 @@ do
                        die "available strategies are: $all_strategies" ;;
                esac
                ;;
+       --reflog-action=*)
+               rloga=`expr "z$1" : 'z-[^=]*=\(.*\)'`
+               ;;
        -*)     usage ;;
        *)      break ;;
        esac
@@ -131,6 +141,7 @@ shift
 
 # All the rest are remote heads
 test "$#" = 0 && usage ;# we need at least one remote head.
+test "$rloga" = '' && rloga="merge: $@"
 
 remoteheads=
 for remote
@@ -316,7 +327,7 @@ if test '' != "$result_tree"
 then
     parents=$(git-show-branch --independent "$head" "$@" | sed -e 's/^/-p /')
     result_commit=$(echo "$merge_msg" | git-commit-tree $result_tree $parents) || exit
-    finish "$result_commit" "Merge $result_commit, made by $wt_strategy."
+    finish "$result_commit" "Merge made by $wt_strategy."
     dropsave
     exit 0
 fi

diff --git a/git-pull.sh b/git-pull.sh
index d337bf4da31c8a86eeaee7b34b910611100ccca8..f380437997f053d15a177a941f3b8a1543c56a18 100755 (executable)
--- a/git-pull.sh
+++ b/git-pull.sh
@@ -102,5 +102,6 @@ case "$strategy_args" in
 esac
 
 merge_name=$(git-fmt-merge-msg <"$GIT_DIR/FETCH_HEAD") || exit
-git-merge $no_summary $no_commit $squash $strategy_args \
+git-merge "--reflog-action=pull $*" \
+       $no_summary $no_commit $squash $strategy_args \
        "$merge_name" HEAD $merge_head