Invoke "git gc --auto" from commit, merge, am and rebase.

The point of auto gc is to pack new objects created in loose
format, so a good rule of thumb is where we do update-ref after
creating a new commit.

Signed-off-by: Junio C Hamano <redacted>
---
  Let's chuck the previous "git add/git fetch" one, and replace it
  with this.

  Also I realize I misread your earlier comment about "git add".
  You are still among the only few people on the list that I
  consider are always more right than I am ;-).

 git-am.sh                  |    2 ++
 git-commit.sh              |    1 +
 git-merge.sh               |    1 +
 git-rebase--interactive.sh |    2 ++
 4 files changed, 6 insertions(+), 0 deletions(-)

diff --git a/git-am.sh b/git-am.sh
index 6809aa0..4db4701 100755
--- a/git-am.sh
+++ b/git-am.sh

@@ -466,6 +466,8 @@ do
 		"$GIT_DIR"/hooks/post-applypatch
 	fi
 
+	git gc --auto
+
 	go_next
 done
 

diff --git a/git-commit.sh b/git-commit.sh
index 1d04f1f..d22d35e 100755
--- a/git-commit.sh
+++ b/git-commit.sh

@@ -652,6 +652,7 @@ git rerere
 
 if test "$ret" = 0
 then
+	git gc --auto
 	if test -x "$GIT_DIR"/hooks/post-commit
 	then
 		"$GIT_DIR"/hooks/post-commit

diff --git a/git-merge.sh b/git-merge.sh
index 3a01db0..697bec2 100755
--- a/git-merge.sh
+++ b/git-merge.sh

@@ -82,6 +82,7 @@ finish () {
 			;;
 		*)
 			git update-ref -m "$rlogm" HEAD "$1" "$head" || exit 1
+			git gc --auto
 			;;
 		esac
 		;;

diff --git a/git-rebase--interactive.sh b/git-rebase--interactive.sh
index abc2b1c..8258b7a 100755
--- a/git-rebase--interactive.sh
+++ b/git-rebase--interactive.sh

@@ -307,6 +307,8 @@ do_next () {
 	rm -rf "$DOTEST" &&
 	warn "Successfully rebased and updated $HEADNAME."
 
+	git gc --auto
+
 	exit
 }
 

Junio C Hamano [off-list ref] wrote:

The point of auto gc is to pack new objects created in loose
format, so a good rule of thumb is where we do update-ref after
creating a new commit.

...

 git-am.sh                  |    2 ++
 git-commit.sh              |    1 +
 git-merge.sh               |    1 +
 git-rebase--interactive.sh |    2 ++
 4 files changed, 6 insertions(+), 0 deletions(-)

...

Why bother with git-rebase--interactive.sh?  It calls two tools,
git-cherry-pick (which calls git-commit) and git-commit to do its
per-commit dirty work.  So on every step of `git rebase -i` we are
now running `git gc --auto`.  No need to also run it at the end.

Note this is also true of `git rebase -m` as that uses the wonderful
feature of `git commit -C $oldid` per commit to make the new commit.
 
-- 
Shawn.