repack: add -F flag to let user choose between --no-reuse-delta/object

In 479b56ba ('make "repack -f" imply "pack-objects --no-reuse-object"'),
git repack -f was changed to include recompressing all objects on the
zlib level on the assumption that if the user wants to spend that much
time already, some more time won't hurt (and recompressing is useful if
the user changed the zlib compression level).

However, "some more time" can be quite long with very big repositories,
so some users are going to appreciate being able to choose. If we are
going to give them the choice, --no-reuse-object will probably be
interesting a lot less frequently than --no-reuse-delta. Hence, this
reverts -f to the old behaviour (--no-reuse-delta) and adds a new -F
option that replaces the current -f.

Measurements taken using this patch on a current clone of git.git
indicate a 17% decrease in time being made available to users:

git repack -Adf  34.84s user 0.56s system 145% cpu 24.388 total
git repack -AdF  38.79s user 0.56s system 133% cpu 29.394 total

Signed-off-by: Jan Krüger <jk@jk.gs>
Acked-by: Nicolas Pitre <nico@fluxnic.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/Documentation/git-repack.txt b/Documentation/git-repack.txt
index 8c67d1724f705c94fb8faf6801ee2bc7cd459629..9566727f7ad6c1690571f7321f79da951c8c6b50 100644 (file)
--- a/Documentation/git-repack.txt
+++ b/Documentation/git-repack.txt
@@ -8,7 +8,7 @@ git-repack - Pack unpacked objects in a repository
 
 SYNOPSIS
 --------
-'git repack' [-a] [-A] [-d] [-f] [-l] [-n] [-q] [--window=N] [--depth=N]
+'git repack' [-a] [-A] [-d] [-f] [-F] [-l] [-n] [-q] [--window=N] [--depth=N]
 
 DESCRIPTION
 -----------
@@ -62,6 +62,10 @@ other objects in that pack they already have locally.
        linkgit:git-pack-objects[1].
 
 -f::
+       Pass the `--no-reuse-delta` option to `git-pack-objects`, see
+       linkgit:git-pack-objects[1].
+
+-F::
        Pass the `--no-reuse-object` option to `git-pack-objects`, see
        linkgit:git-pack-objects[1].
 

diff --git a/git-repack.sh b/git-repack.sh
index 1eb3bca352f38ec3807383cc5fff7f7e62731b2b..769baaf7e11277db47f4e897aea82c1581201c6b 100755 (executable)
--- a/git-repack.sh
+++ b/git-repack.sh
@@ -10,7 +10,8 @@ git repack [options]
 a               pack everything in a single pack
 A               same as -a, and turn unreachable objects loose
 d               remove redundant packs, and run git-prune-packed
-f               pass --no-reuse-object to git-pack-objects
+f               pass --no-reuse-delta to git-pack-objects
+F               pass --no-reuse-object to git-pack-objects
 n               do not run git-update-server-info
 q,quiet         be quiet
 l               pass --local to git-pack-objects
@@ -34,7 +35,8 @@ do
                unpack_unreachable=--unpack-unreachable ;;
        -d)     remove_redundant=t ;;
        -q)     GIT_QUIET=t ;;
-       -f)     no_reuse=--no-reuse-object ;;
+       -f)     no_reuse=--no-reuse-delta ;;
+       -F)     no_reuse=--no-reuse-object ;;
        -l)     local=--local ;;
        --max-pack-size|--window|--window-memory|--depth)
                extra="$extra $1=$2"; shift ;;