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2020-04-11rebase --merge: optionally skip upstreamed commitsLibravatar Jonathan Tan1-0/+77
When rebasing against an upstream that has had many commits since the original branch was created: O -- O -- ... -- O -- O (upstream) \ -- O (my-dev-branch) it must read the contents of every novel upstream commit, in addition to the tip of the upstream and the merge base, because "git rebase" attempts to exclude commits that are duplicates of upstream ones. This can be a significant performance hit, especially in a partial clone, wherein a read of an object may end up being a fetch. Add a flag to "git rebase" to allow suppression of this feature. This flag only works when using the "merge" backend. This flag changes the behavior of sequencer_make_script(), called from do_interactive_rebase() <- run_rebase_interactive() <- run_specific_rebase() <- cmd_rebase(). With this flag, limit_list() (indirectly called from sequencer_make_script() through prepare_revision_walk()) will no longer call cherry_pick_list(), and thus PATCHSAME is no longer set. Refraining from setting PATCHSAME both means that the intermediate commits in upstream are no longer read (as shown by the test) and means that no PATCHSAME-caused skipping of commits is done by sequencer_make_script(), either directly or through make_script_with_merges(). Signed-off-by: Jonathan Tan <jonathantanmy@google.com> Signed-off-by: Elijah Newren <newren@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-07-16t3000-t3999: fix broken &&-chainsLibravatar Eric Sunshine1-2/+2
Signed-off-by: Eric Sunshine <sunshine@sunshineco.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2016-04-24git-rebase--merge: don't include absent parent as a baseLibravatar Ben Woosley1-0/+9
Absent this fix, attempts to rebase an orphan branch using "rebase -m" fails with: $ git rebase -m ORPHAN_TARGET_BASE First, rewinding head to replay your work on top of it... fatal: Could not parse object 'ORPHAN_ROOT_SHA^' Unknown exit code (128) from command: git-merge-recursive ORPHAN_ROOT_SHA^ -- HEAD ORPHAN_ROOT_SHA To fix, this will only include the rebase root's parent as a base if it exists, so that in cases of rebasing an orphan branch, it is a simple two-way merge. Note the default rebase behavior does not fail: $ git rebase ORPHAN_TARGET_BASE First, rewinding head to replay your work on top of it... Applying: ORPHAN_ROOT_COMMIT_MSG Using index info to reconstruct a base tree... A few tests were expecting the old behaviour to forbid rebasing such a history with "rebase -m", which now need to expect them to succeed. Signed-off-by: Ben Woosley <ben.woosley@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-04-29merge: deprecate 'git merge <message> HEAD <commit>' syntaxLibravatar Junio C Hamano1-1/+1
We had this in "git merge" manual for eternity: 'git merge' <msg> HEAD <commit>... [This] syntax (<msg> `HEAD` <commit>...) is supported for historical reasons. Do not use it from the command line or in new scripts. It is the same as `git merge -m <msg> <commit>...`. With the update to "git merge" to make it understand what is recorded in FETCH_HEAD directly, including Octopus merge cases, we now can rewrite the use of this syntax in "git pull" with a simple "git merge FETCH_HEAD". Also there are quite a few fallouts in the test scripts, and it turns out that "git cvsimport" also uses this old syntax to record a merge. Judging from this result, I would not be surprised if dropping the support of the old syntax broke scripts people have written and been relying on for the past ten years. But at least we can start the deprecation process by throwing a warning message when the syntax is used. With luck, we might be able to drop the support in a few years. Signed-off-by: Junio C Hamano <gitster@pobox.com>
2014-06-16rebase--merge: fix --skip with two conflicts in a rowLibravatar brian m. carlson1-0/+15
If git rebase --merge encountered a conflict, --skip would not work if the next commit also conflicted. The msgnum file would never be updated with the new patch number, so no patch would actually be skipped, resulting in an inescapable loop. Update the msgnum file's value as the first thing in call_merge. This also avoids an "Already applied" message when skipping a commit. There is no visible change for the other contexts in which call_merge is invoked, as the msgnum file's value remains unchanged in those situations. Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2010-11-11t3402: test "rebase -s<strategy> -X<opt>"Libravatar Junio C Hamano1-0/+21
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2010-08-03rebase: support -X to pass through strategy optionsLibravatar Mike Lundy1-0/+9
git-rebase calls out to merge strategies, but did not support merge strategy options so far. Add this, in the same style used in git-merge. Sadly we have to do the full quoting/eval dance here, since merge-recursive supports the --subtree=<path> option which potentially contains whitespace. This patch does not cover git rebase -i, which does not call any merge strategy directly except in --preserve-merges, and even then only for merges. [jc: with a trivial fix-up for 'expr'] Signed-off-by: Mike Lundy <mike@fluffypenguin.org> Signed-off-by: Thomas Rast <trast@student.ethz.ch> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2007-11-09rebase: operate on a detached HEADLibravatar Johannes Schindelin1-1/+6
The interactive version of rebase does all the operations on a detached HEAD, so that after a successful rebase, <branch>@{1} is the pre-rebase state. The reflogs of "HEAD" still show all the actions in detail. This teaches the non-interactive version to do the same. Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2006-10-27tests: merge-recursive is usable without PythonLibravatar Junio C Hamano1-6/+0
Many tests still protected themselves with $no_python; there is no need to do so anymore. Signed-off-by: Junio C Hamano <junkio@cox.net>
2006-06-21rebase: error out for NO_PYTHON if they use recursive mergeLibravatar Eric Wong1-0/+6
recursive merge relies on Python, and we can't perform rename-aware merges without the recursive merge. So bail out before trying it. The test won't work w/o recursive merge, either, so skip that, too. Signed-off-by: Eric Wong <normalperson@yhbt.net> Signed-off-by: Junio C Hamano <junkio@cox.net>
2006-06-21Add renaming-rebase test.Libravatar Junio C Hamano1-0/+106
Signed-off-by: Junio C Hamano <junkio@cox.net>