This new feature allows a rebase to be executed on a dirty worktree or
index. It works by creating a temporary "dangling merge commit" out
of the worktree and index changes (via 'git stash create'), and
automatically applying it after a successful rebase or abort.
rebase stores the SHA-1 hex of the temporary merge commit, along with
the rest of the rebase state, in either
.git/{rebase-merge,rebase-apply}/autostash depending on the kind of
rebase. Since $state_dir is automatically removed at the end of a
successful rebase or abort, so is the autostash.
The advantage of this approach is that we do not affect the normal
stash's reflogs, making the autostash invisible to the end-user. This
means that you can use 'git stash' during a rebase as usual.
When the autostash application results in a conflict, we push
$state_dir/autostash onto the normal stash and remove $state_dir
ending the rebase. The user can inspect the stash, and pop or drop at
any time.
Most significantly, this feature means that a caller like pull (with
pull.rebase set to true) can easily be patched to remove the
require_clean_work_tree restriction.
Signed-off-by: Ramkumar Ramachandra <artagnon@xxxxxxxxx>
---
Documentation/config.txt | 8 +++
Documentation/git-rebase.txt | 10 +++
git-rebase.sh | 43 ++++++++++++-
t/t3420-rebase-autostash.sh | 148 +++++++++++++++++++++++++++++++++++++++++++
4 files changed, 206 insertions(+), 3 deletions(-)
create mode 100755 t/t3420-rebase-autostash.sh
diff --git a/Documentation/config.txt b/Documentation/config.txt
index 6e53fc5..7fd4035 100644
--- a/Documentation/config.txt
+++ b/Documentation/config.txt
@@ -1867,6 +1867,14 @@ rebase.stat::
rebase.autosquash::
If set to true enable '--autosquash' option by default.
+rebase.autostash::
+ When set to true, automatically create a temporary stash
+ before the operation begins, and apply it after the operation
+ ends. This means that you can run rebase on a dirty worktree.
+ However, use with care: the final stash application after a
+ successful rebase might result in non-trivial conflicts.
+ Defaults to false.
+
receive.autogc::
By default, git-receive-pack will run "git-gc --auto" after
receiving data from git-push and updating refs. You can stop
diff --git a/Documentation/git-rebase.txt b/Documentation/git-rebase.txt
index aca8405..c84854a 100644
--- a/Documentation/git-rebase.txt
+++ b/Documentation/git-rebase.txt
@@ -208,6 +208,9 @@ rebase.stat::
rebase.autosquash::
If set to true enable '--autosquash' option by default.
+rebase.autostash::
+ If set to true enable '--autostash' option by default.
+
OPTIONS
-------
--onto <newbase>::
@@ -394,6 +397,13 @@ If the '--autosquash' option is enabled by default using the
configuration variable `rebase.autosquash`, this option can be
used to override and disable this setting.
+--[no-]autostash::
+ Automatically create a temporary stash before the operation
+ begins, and apply it after the operation ends. This means
+ that you can run rebase on a dirty worktree. However, use
+ with care: the final stash application after a successful
+ rebase might result in non-trivial conflicts.
+
--no-ff::
With --interactive, cherry-pick all rebased commits instead of
fast-forwarding over the unchanged ones. This ensures that the
diff --git a/git-rebase.sh b/git-rebase.sh
index f8b533d..709ef6b 100755
--- a/git-rebase.sh
+++ b/git-rebase.sh
@@ -13,6 +13,7 @@ git-rebase --continue | --abort | --skip | --edit-todo
Available options are
v,verbose! display a diffstat of what changed upstream
q,quiet! be quiet. implies --no-stat
+autostash! automatically stash/stash pop before and after
onto=! rebase onto given branch instead of upstream
p,preserve-merges! try to recreate merges instead of ignoring them
s,strategy=! use the given merge strategy
@@ -64,6 +65,7 @@ apply_dir="$GIT_DIR"/rebase-apply
verbose=
diffstat=
test "$(git config --bool rebase.stat)" = true && diffstat=t
+autostash="$(git config --bool rebase.autostash || echo false)"
git_am_opt=
rebase_root=
force_rebase=
@@ -143,6 +145,28 @@ move_to_original_branch () {
esac
}
+finish_rebase () {
+ if test -f "$state_dir/autostash"
+ then
+ stash_sha1=$(cat "$state_dir/autostash")
+ if git stash apply $stash_sha1 2>&1 >/dev/null
+ then
+ echo "Applied autostash"
+ else
+ ref_stash=refs/stash &&
+ : >>"$GIT_DIR/logs/$ref_stash" &&
+ git update-ref -m "autostash" $ref_stash $stash_sha1 \
+ || die "$(eval_gettext 'Cannot store $stash_sha1')"
+ echo "
+$(gettext 'Applying autostash resulted in conflicts.
+Your changes are safe in the stash.
+You can apply or drop it at any time.')"
+ fi
+ fi
+ git gc --auto &&
+ rm -rf "$state_dir"
+}
+
run_specific_rebase () {
if [ "$interactive_rebase" = implied ]; then
GIT_EDITOR=:
@@ -153,8 +177,7 @@ run_specific_rebase () {
ret=$?
if test $ret -eq 0
then
- git gc --auto &&
- rm -rf "$state_dir"
+ finish_rebase
fi
exit $ret
}
@@ -248,6 +271,9 @@ do
--stat)
diffstat=t
;;
+ --autostash)
+ autostash=true
+ ;;
-v)
verbose=t
diffstat=t
@@ -348,7 +374,7 @@ abort)
;;
esac
output git reset --hard $orig_head
- rm -r "$state_dir"
+ finish_rebase
exit
;;
edit-todo)
@@ -487,6 +513,17 @@ case "$#" in
;;
esac
+if test "$autostash" = true && ! (require_clean_work_tree) 2>/dev/null
+then
+ stash_sha1=$(git stash create "autostash") \
+ || die "$(gettext 'Cannot autostash')"
+ mkdir -p "$state_dir" &&
+ echo $stash_sha1 >"$state_dir/autostash" &&
+ stash_abbrev=$(git rev-parse --short $stash_sha1) &&
+ echo "$(eval_gettext 'Created autostash: $stash_abbrev')" &&
+ git reset --hard
+fi
+
require_clean_work_tree "rebase" "$(gettext "Please commit or stash them.")"
# Now we are rebasing commits $upstream..$orig_head (or with --root,
diff --git a/t/t3420-rebase-autostash.sh b/t/t3420-rebase-autostash.sh
new file mode 100755
index 0000000..479cbb2
--- /dev/null
+++ b/t/t3420-rebase-autostash.sh
@@ -0,0 +1,148 @@
+#!/bin/sh
+#
+# Copyright (c) 2013 Ramkumar Ramachandra
+#
+
+test_description='git rebase --autostash tests'
+. ./test-lib.sh
+
+test_expect_success setup '
+ echo hello-world >file0 &&
+ git add . &&
+ test_tick &&
+ git commit -m "initial commit" &&
+ git checkout -b feature-branch &&
+ echo another-hello >file1 &&
+ echo goodbye >file2 &&
+ git add . &&
+ test_tick &&
+ git commit -m "second commit" &&
+ echo final-goodbye >file3 &&
+ git add . &&
+ test_tick &&
+ git commit -m "third commit" &&
+ git checkout -b unrelated-onto-branch master &&
+ echo unrelated >file4 &&
+ git add . &&
+ test_tick &&
+ git commit -m "unrelated commit" &&
+ git checkout -b related-onto-branch master &&
+ echo conflicting-change >file2 &&
+ git add . &&
+ test_tick &&
+ git commit -m "related commit"
+'
+
+testrebase() {
+ type=$1
+ dotest=$2
+
+ test_expect_success "rebase$type: dirty worktree, non-conflicting rebase" '
+ test_config rebase.autostash true &&
+ git reset --hard &&
+ git checkout -b rebased-feature-branch feature-branch &&
+ test_when_finished git branch -D rebased-feature-branch &&
+ echo dirty >>file3 &&
+ git rebase$type unrelated-onto-branch &&
+ grep unrelated file4 &&
+ grep dirty file3 &&
+ git checkout feature-branch
+ '
+
+ test_expect_success "rebase$type: dirty index, non-conflicting rebase" '
+ test_config rebase.autostash true &&
+ git reset --hard &&
+ git checkout -b rebased-feature-branch feature-branch &&
+ test_when_finished git branch -D rebased-feature-branch &&
+ echo dirty >>file3 &&
+ git add file3 &&
+ git rebase$type unrelated-onto-branch &&
+ grep unrelated file4 &&
+ grep dirty file3 &&
+ git checkout feature-branch
+ '
+
+ test_expect_success "rebase$type: conflicting rebase" '
+ test_config rebase.autostash true &&
+ git reset --hard &&
+ git checkout -b rebased-feature-branch feature-branch &&
+ test_when_finished git branch -D rebased-feature-branch &&
+ echo dirty >>file3 &&
+ test_must_fail git rebase$type related-onto-branch &&
+ test_path_is_file $dotest/autostash &&
+ ! grep dirty file3 &&
+ rm -rf $dotest &&
+ git reset --hard &&
+ git checkout feature-branch
+ '
+
+ test_expect_success "rebase$type: --continue" '
+ test_config rebase.autostash true &&
+ git reset --hard &&
+ git checkout -b rebased-feature-branch feature-branch &&
+ test_when_finished git branch -D rebased-feature-branch &&
+ echo dirty >>file3 &&
+ test_must_fail git rebase$type related-onto-branch &&
+ test_path_is_file $dotest/autostash &&
+ ! grep dirty file3 &&
+ echo "conflicting-plus-goodbye" >file2 &&
+ git add file2 &&
+ git rebase --continue &&
+ test_path_is_missing $dotest/autostash &&
+ grep dirty file3 &&
+ git checkout feature-branch
+ '
+
+ test_expect_success "rebase$type: --skip" '
+ test_config rebase.autostash true &&
+ git reset --hard &&
+ git checkout -b rebased-feature-branch feature-branch &&
+ test_when_finished git branch -D rebased-feature-branch &&
+ echo dirty >>file3 &&
+ test_must_fail git rebase$type related-onto-branch &&
+ test_path_is_file $dotest/autostash &&
+ ! grep dirty file3 &&
+ git rebase --skip &&
+ test_path_is_missing $dotest/autostash &&
+ grep dirty file3 &&
+ git checkout feature-branch
+ '
+
+ test_expect_success "rebase$type: --abort" '
+ test_config rebase.autostash true &&
+ git reset --hard &&
+ git checkout -b rebased-feature-branch feature-branch &&
+ test_when_finished git branch -D rebased-feature-branch &&
+ echo dirty >>file3 &&
+ test_must_fail git rebase$type related-onto-branch &&
+ test_path_is_file $dotest/autostash &&
+ ! grep dirty file3 &&
+ git rebase --abort &&
+ test_path_is_missing $dotest/autostash &&
+ grep dirty file3 &&
+ git checkout feature-branch
+ '
+
+ test_expect_success "rebase$type: non-conflicting rebase, conflicting stash" '
+ test_config rebase.autostash true &&
+ git reset --hard &&
+ git checkout -b rebased-feature-branch feature-branch &&
+ test_when_finished git branch -D rebased-feature-branch &&
+ echo dirty >file4 &&
+ git add file4 &&
+ git rebase$type unrelated-onto-branch &&
+ test_path_is_missing $dotest &&
+ git reset --hard &&
+ grep unrelated file4 &&
+ ! grep dirty file4 &&
+ git checkout feature-branch &&
+ git stash pop &&
+ grep dirty file4
+ '
+}
+
+testrebase "" .git/rebase-apply
+testrebase " --merge" .git/rebase-merge
+testrebase " --interactive" .git/rebase-merge
+
+test_done
--
1.8.3.rc1.51.gd7a04de
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