2005-06-25 09:23:43 +00:00
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#!/bin/sh
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#
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# Copyright (c) 2005 Junio C Hamano.
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#
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2010-05-31 22:51:32 +00:00
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USAGE='[--interactive | -i] [-v] [--force-rebase | -f] [--no-ff] [--onto <newbase>] (<upstream>|--root) [<branch>] [--quiet | -q]'
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2006-04-26 14:49:38 +00:00
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LONG_USAGE='git-rebase replaces <branch> with a new branch of the
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same name. When the --onto option is provided the new branch starts
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out with a HEAD equal to <newbase>, otherwise it is equal to <upstream>
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It then attempts to create a new commit for each commit from the original
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<branch> that does not exist in the <upstream> branch.
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2006-02-22 01:10:12 +00:00
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2006-04-26 14:49:38 +00:00
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It is possible that a merge failure will prevent this process from being
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completely automatic. You will have to resolve any such merge failure
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2006-05-14 03:34:08 +00:00
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and run git rebase --continue. Another option is to bypass the commit
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that caused the merge failure with git rebase --skip. To restore the
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2008-07-21 10:51:02 +00:00
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original <branch> and remove the .git/rebase-apply working files, use the
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command git rebase --abort instead.
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2006-02-22 01:10:12 +00:00
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2006-04-26 14:49:38 +00:00
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Note that if <branch> is not specified on the command line, the
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2008-03-10 14:38:33 +00:00
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currently checked out branch is used.
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2006-02-14 22:42:05 +00:00
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2006-04-26 14:49:38 +00:00
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Example: git-rebase master~1 topic
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2006-02-14 22:42:05 +00:00
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2006-04-26 14:49:38 +00:00
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A---B---C topic A'\''--B'\''--C'\'' topic
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/ --> /
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D---E---F---G master D---E---F---G master
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2006-02-14 22:42:05 +00:00
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'
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2007-01-12 20:52:03 +00:00
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SUBDIRECTORY_OK=Yes
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2007-11-06 09:50:02 +00:00
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OPTIONS_SPEC=
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2005-11-24 08:12:11 +00:00
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. git-sh-setup
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2006-12-28 07:34:48 +00:00
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set_reflog_action rebase
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2006-12-31 04:32:38 +00:00
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require_work_tree
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2007-01-12 20:52:03 +00:00
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cd_to_toplevel
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2005-08-07 22:51:09 +00:00
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2009-11-20 11:02:44 +00:00
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LF='
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'
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2008-10-06 05:14:29 +00:00
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OK_TO_SKIP_PRE_REBASE=
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2006-05-14 03:34:08 +00:00
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RESOLVEMSG="
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When you have resolved this problem run \"git rebase --continue\".
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If you would prefer to skip this patch, instead run \"git rebase --skip\".
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To restore the original branch and stop rebasing run \"git rebase --abort\".
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"
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2006-02-14 22:42:05 +00:00
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unset newbase
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2006-09-25 02:49:47 +00:00
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strategy=recursive
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2006-06-21 10:04:41 +00:00
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do_merge=
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2008-07-16 01:33:44 +00:00
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dotest="$GIT_DIR"/rebase-merge
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2006-06-21 10:04:41 +00:00
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prec=4
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2006-10-03 16:29:31 +00:00
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verbose=
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2009-03-01 22:11:38 +00:00
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diffstat=$(git config --bool rebase.stat)
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2007-02-08 13:57:08 +00:00
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git_am_opt=
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2009-01-05 17:35:16 +00:00
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rebase_root=
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2009-02-13 22:48:01 +00:00
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force_rebase=
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2009-12-04 08:20:48 +00:00
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allow_rerere_autoupdate=
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2006-06-21 10:04:41 +00:00
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continue_merge () {
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test -n "$prev_head" || die "prev_head must be defined"
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test -d "$dotest" || die "$dotest directory does not exist"
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2007-07-03 05:52:14 +00:00
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unmerged=$(git ls-files -u)
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2006-06-21 10:04:41 +00:00
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if test -n "$unmerged"
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then
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echo "You still have unmerged paths in your index"
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2007-06-02 17:59:49 +00:00
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echo "did you forget to use git add?"
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2006-06-28 09:11:06 +00:00
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die "$RESOLVEMSG"
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2006-06-21 10:04:41 +00:00
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fi
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2007-10-17 09:31:35 +00:00
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cmt=`cat "$dotest/current"`
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2008-05-14 17:03:59 +00:00
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if ! git diff-index --quiet --ignore-submodules HEAD --
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2006-06-21 10:04:41 +00:00
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then
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2008-03-16 07:50:22 +00:00
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if ! git commit --no-verify -C "$cmt"
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2006-06-28 10:24:23 +00:00
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then
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echo "Commit failed, please do not call \"git commit\""
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echo "directly, but instead do one of the following: "
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die "$RESOLVEMSG"
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fi
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2009-06-16 22:33:01 +00:00
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if test -z "$GIT_QUIET"
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then
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printf "Committed: %0${prec}d " $msgnum
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fi
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2010-03-12 17:04:29 +00:00
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echo "$cmt $(git rev-parse HEAD^0)" >> "$dotest/rewritten"
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2006-06-21 10:04:41 +00:00
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else
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2009-06-16 22:33:01 +00:00
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if test -z "$GIT_QUIET"
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then
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printf "Already applied: %0${prec}d " $msgnum
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fi
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fi
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2010-01-25 07:06:31 +00:00
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test -z "$GIT_QUIET" &&
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2010-01-30 16:23:37 +00:00
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GIT_PAGER='' git log --format=%s -1 "$cmt"
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2006-06-21 10:04:41 +00:00
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2007-07-03 05:52:14 +00:00
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prev_head=`git rev-parse HEAD^0`
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2006-06-21 10:04:41 +00:00
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# save the resulting commit so we can read-tree on it later
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echo "$prev_head" > "$dotest/prev_head"
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# onto the next patch:
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msgnum=$(($msgnum + 1))
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2006-06-22 08:44:54 +00:00
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echo "$msgnum" >"$dotest/msgnum"
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2006-06-21 10:04:41 +00:00
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}
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call_merge () {
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2007-10-17 09:31:35 +00:00
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cmt="$(cat "$dotest/cmt.$1")"
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2006-06-21 10:04:41 +00:00
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echo "$cmt" > "$dotest/current"
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2007-07-03 05:52:14 +00:00
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hd=$(git rev-parse --verify HEAD)
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2007-11-08 18:19:08 +00:00
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cmt_name=$(git symbolic-ref HEAD 2> /dev/null || echo HEAD)
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2007-10-17 09:31:35 +00:00
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msgnum=$(cat "$dotest/msgnum")
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end=$(cat "$dotest/end")
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2006-12-28 07:34:56 +00:00
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eval GITHEAD_$cmt='"${cmt_name##refs/heads/}~$(($end - $msgnum))"'
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2007-10-17 09:31:35 +00:00
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eval GITHEAD_$hd='$(cat "$dotest/onto_name")'
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2006-12-28 07:34:56 +00:00
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export GITHEAD_$cmt GITHEAD_$hd
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2009-06-16 22:33:01 +00:00
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if test -n "$GIT_QUIET"
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then
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export GIT_MERGE_VERBOSITY=1
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fi
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2006-12-28 07:34:56 +00:00
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git-merge-$strategy "$cmt^" -- "$hd" "$cmt"
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2006-06-21 10:04:41 +00:00
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rv=$?
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case "$rv" in
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0)
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2006-12-28 07:34:56 +00:00
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unset GITHEAD_$cmt GITHEAD_$hd
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2006-06-25 01:29:48 +00:00
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return
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2006-06-21 10:04:41 +00:00
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;;
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1)
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2009-12-04 08:20:48 +00:00
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git rerere $allow_rerere_autoupdate
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2006-06-28 09:11:06 +00:00
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die "$RESOLVEMSG"
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2006-06-21 10:04:41 +00:00
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;;
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2)
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echo "Strategy: $rv $strategy failed, try another" 1>&2
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2006-06-28 09:11:06 +00:00
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die "$RESOLVEMSG"
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2006-06-21 10:04:41 +00:00
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;;
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*)
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die "Unknown exit code ($rv) from command:" \
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"git-merge-$strategy $cmt^ -- HEAD $cmt"
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;;
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esac
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}
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2007-11-08 18:19:08 +00:00
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move_to_original_branch () {
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test -z "$head_name" &&
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head_name="$(cat "$dotest"/head-name)" &&
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onto="$(cat "$dotest"/onto)" &&
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orig_head="$(cat "$dotest"/orig-head)"
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case "$head_name" in
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refs/*)
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message="rebase finished: $head_name onto $onto"
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git update-ref -m "$message" \
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$head_name $(git rev-parse HEAD) $orig_head &&
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git symbolic-ref HEAD $head_name ||
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die "Could not move back to $head_name"
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;;
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esac
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}
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2006-06-21 10:04:41 +00:00
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finish_rb_merge () {
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2007-11-08 18:19:08 +00:00
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move_to_original_branch
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2010-03-12 17:04:33 +00:00
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git notes copy --for-rewrite=rebase < "$dotest"/rewritten
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2010-03-12 17:04:29 +00:00
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if test -x "$GIT_DIR"/hooks/post-rewrite &&
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test -s "$dotest"/rewritten; then
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"$GIT_DIR"/hooks/post-rewrite rebase < "$dotest"/rewritten
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fi
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2006-06-21 10:04:41 +00:00
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rm -r "$dotest"
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2009-06-16 22:33:01 +00:00
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say All done.
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2006-06-21 10:04:41 +00:00
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}
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2007-06-25 00:11:14 +00:00
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is_interactive () {
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2008-09-29 20:28:57 +00:00
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while test $# != 0
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do
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case "$1" in
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-i|--interactive)
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interactive_rebase=explicit
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break
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;;
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-p|--preserve-merges)
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interactive_rebase=implied
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;;
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esac
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2007-06-25 00:11:14 +00:00
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shift
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2008-09-29 20:28:57 +00:00
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done
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if [ "$interactive_rebase" = implied ]; then
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GIT_EDITOR=:
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export GIT_EDITOR
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fi
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test -n "$interactive_rebase" || test -f "$dotest"/interactive
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2007-06-25 00:11:14 +00:00
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}
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2008-10-06 05:14:24 +00:00
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run_pre_rebase_hook () {
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2008-10-06 05:14:29 +00:00
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if test -z "$OK_TO_SKIP_PRE_REBASE" &&
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test -x "$GIT_DIR/hooks/pre-rebase"
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2008-10-06 05:14:24 +00:00
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then
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2009-06-14 23:08:56 +00:00
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"$GIT_DIR/hooks/pre-rebase" ${1+"$@"} ||
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die "The pre-rebase hook refused to rebase."
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2008-10-06 05:14:24 +00:00
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fi
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}
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2008-08-17 04:25:43 +00:00
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test -f "$GIT_DIR"/rebase-apply/applying &&
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die 'It looks like git-am is in progress. Cannot rebase.'
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2007-06-25 00:11:14 +00:00
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is_interactive "$@" && exec git-rebase--interactive "$@"
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2007-09-23 20:42:08 +00:00
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while test $# != 0
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2006-02-14 22:42:05 +00:00
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do
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case "$1" in
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2008-10-06 05:14:29 +00:00
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--no-verify)
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OK_TO_SKIP_PRE_REBASE=yes
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;;
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2006-04-26 14:49:38 +00:00
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--continue)
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2008-07-21 10:51:02 +00:00
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test -d "$dotest" -o -d "$GIT_DIR"/rebase-apply ||
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2008-06-22 14:07:02 +00:00
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die "No rebase in progress?"
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2010-07-28 08:20:16 +00:00
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git update-index --ignore-submodules --refresh &&
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2008-05-14 17:03:59 +00:00
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git diff-files --quiet --ignore-submodules || {
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2007-03-25 00:56:13 +00:00
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echo "You must edit all merge conflicts and then"
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2007-06-02 17:59:49 +00:00
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echo "mark them as resolved using git add"
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2006-04-26 14:49:38 +00:00
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exit 1
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2007-03-25 00:56:13 +00:00
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}
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2006-06-21 10:04:41 +00:00
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if test -d "$dotest"
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then
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2007-10-17 09:31:35 +00:00
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prev_head=$(cat "$dotest/prev_head")
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end=$(cat "$dotest/end")
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msgnum=$(cat "$dotest/msgnum")
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onto=$(cat "$dotest/onto")
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2009-06-16 22:33:01 +00:00
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GIT_QUIET=$(cat "$dotest/quiet")
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2006-06-21 10:04:41 +00:00
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continue_merge
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while test "$msgnum" -le "$end"
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do
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call_merge "$msgnum"
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continue_merge
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done
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finish_rb_merge
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exit
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fi
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2008-07-21 10:51:02 +00:00
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head_name=$(cat "$GIT_DIR"/rebase-apply/head-name) &&
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onto=$(cat "$GIT_DIR"/rebase-apply/onto) &&
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orig_head=$(cat "$GIT_DIR"/rebase-apply/orig-head) &&
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2009-06-16 22:33:01 +00:00
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GIT_QUIET=$(cat "$GIT_DIR"/rebase-apply/quiet)
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2007-11-12 13:11:46 +00:00
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git am --resolved --3way --resolvemsg="$RESOLVEMSG" &&
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move_to_original_branch
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2006-05-14 03:34:08 +00:00
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exit
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;;
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--skip)
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2008-07-21 10:51:02 +00:00
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test -d "$dotest" -o -d "$GIT_DIR"/rebase-apply ||
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2008-06-22 14:07:02 +00:00
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die "No rebase in progress?"
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2007-11-08 07:03:06 +00:00
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git reset --hard HEAD || exit $?
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2006-06-21 10:04:41 +00:00
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if test -d "$dotest"
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then
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2007-07-06 12:05:59 +00:00
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git rerere clear
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2007-10-17 09:31:35 +00:00
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prev_head=$(cat "$dotest/prev_head")
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end=$(cat "$dotest/end")
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msgnum=$(cat "$dotest/msgnum")
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2006-06-25 01:29:49 +00:00
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msgnum=$(($msgnum + 1))
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2007-10-17 09:31:35 +00:00
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onto=$(cat "$dotest/onto")
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2009-06-16 22:33:01 +00:00
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GIT_QUIET=$(cat "$dotest/quiet")
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2006-06-25 01:29:49 +00:00
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while test "$msgnum" -le "$end"
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do
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call_merge "$msgnum"
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continue_merge
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done
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finish_rb_merge
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exit
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2006-06-21 10:04:41 +00:00
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fi
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2008-07-21 10:51:02 +00:00
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head_name=$(cat "$GIT_DIR"/rebase-apply/head-name) &&
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onto=$(cat "$GIT_DIR"/rebase-apply/onto) &&
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orig_head=$(cat "$GIT_DIR"/rebase-apply/orig-head) &&
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2009-06-16 22:33:01 +00:00
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GIT_QUIET=$(cat "$GIT_DIR"/rebase-apply/quiet)
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2007-11-08 18:19:08 +00:00
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git am -3 --skip --resolvemsg="$RESOLVEMSG" &&
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move_to_original_branch
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2006-04-26 14:49:38 +00:00
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exit
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;;
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--abort)
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2008-07-21 10:51:02 +00:00
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test -d "$dotest" -o -d "$GIT_DIR"/rebase-apply ||
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2008-06-22 14:07:02 +00:00
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die "No rebase in progress?"
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|
|
2007-07-06 12:05:59 +00:00
|
|
|
git rerere clear
|
2006-06-21 10:04:41 +00:00
|
|
|
if test -d "$dotest"
|
|
|
|
then
|
2009-06-16 22:33:01 +00:00
|
|
|
GIT_QUIET=$(cat "$dotest/quiet")
|
2007-11-08 18:19:08 +00:00
|
|
|
move_to_original_branch
|
2008-06-22 14:07:02 +00:00
|
|
|
else
|
2008-07-21 10:51:02 +00:00
|
|
|
dotest="$GIT_DIR"/rebase-apply
|
2009-06-16 22:33:01 +00:00
|
|
|
GIT_QUIET=$(cat "$dotest/quiet")
|
2007-11-08 18:19:08 +00:00
|
|
|
move_to_original_branch
|
2006-06-21 10:04:41 +00:00
|
|
|
fi
|
2008-05-04 05:37:51 +00:00
|
|
|
git reset --hard $(cat "$dotest/orig-head")
|
2008-03-01 10:32:14 +00:00
|
|
|
rm -r "$dotest"
|
2006-04-26 14:49:38 +00:00
|
|
|
exit
|
|
|
|
;;
|
2006-02-14 22:42:05 +00:00
|
|
|
--onto)
|
|
|
|
test 2 -le "$#" || usage
|
|
|
|
newbase="$2"
|
|
|
|
shift
|
|
|
|
;;
|
2006-06-21 10:04:41 +00:00
|
|
|
-M|-m|--m|--me|--mer|--merg|--merge)
|
|
|
|
do_merge=t
|
|
|
|
;;
|
|
|
|
-s=*|--s=*|--st=*|--str=*|--stra=*|--strat=*|--strate=*|\
|
|
|
|
--strateg=*|--strategy=*|\
|
|
|
|
-s|--s|--st|--str|--stra|--strat|--strate|--strateg|--strategy)
|
|
|
|
case "$#,$1" in
|
|
|
|
*,*=*)
|
2006-06-27 16:54:26 +00:00
|
|
|
strategy=`expr "z$1" : 'z-[^=]*=\(.*\)'` ;;
|
2006-06-21 10:04:41 +00:00
|
|
|
1,*)
|
|
|
|
usage ;;
|
|
|
|
*)
|
|
|
|
strategy="$2"
|
|
|
|
shift ;;
|
|
|
|
esac
|
|
|
|
do_merge=t
|
|
|
|
;;
|
2009-03-01 22:11:38 +00:00
|
|
|
-n|--no-stat)
|
|
|
|
diffstat=
|
|
|
|
;;
|
|
|
|
--stat)
|
|
|
|
diffstat=t
|
|
|
|
;;
|
2006-10-03 16:29:31 +00:00
|
|
|
-v|--verbose)
|
|
|
|
verbose=t
|
2009-03-01 22:11:38 +00:00
|
|
|
diffstat=t
|
2009-06-16 22:33:01 +00:00
|
|
|
GIT_QUIET=
|
|
|
|
;;
|
|
|
|
-q|--quiet)
|
|
|
|
GIT_QUIET=t
|
|
|
|
git_am_opt="$git_am_opt -q"
|
|
|
|
verbose=
|
|
|
|
diffstat=
|
2006-10-03 16:29:31 +00:00
|
|
|
;;
|
2007-09-07 14:20:50 +00:00
|
|
|
--whitespace=*)
|
|
|
|
git_am_opt="$git_am_opt $1"
|
2009-02-13 22:48:01 +00:00
|
|
|
case "$1" in
|
|
|
|
--whitespace=fix|--whitespace=strip)
|
|
|
|
force_rebase=t
|
|
|
|
;;
|
|
|
|
esac
|
2007-09-07 14:20:50 +00:00
|
|
|
;;
|
2009-08-04 11:16:49 +00:00
|
|
|
--ignore-whitespace)
|
|
|
|
git_am_opt="$git_am_opt $1"
|
|
|
|
;;
|
2009-03-18 20:53:49 +00:00
|
|
|
--committer-date-is-author-date|--ignore-date)
|
|
|
|
git_am_opt="$git_am_opt $1"
|
|
|
|
force_rebase=t
|
|
|
|
;;
|
2007-02-08 13:57:08 +00:00
|
|
|
-C*)
|
2007-09-07 14:20:50 +00:00
|
|
|
git_am_opt="$git_am_opt $1"
|
2007-02-08 13:57:08 +00:00
|
|
|
;;
|
2009-01-05 17:35:16 +00:00
|
|
|
--root)
|
|
|
|
rebase_root=t
|
|
|
|
;;
|
2010-08-08 05:13:32 +00:00
|
|
|
-f|--f|--fo|--for|--forc|--force|--force-r|--force-re|--force-reb|--force-reba|--force-rebas|--force-rebase|--no-ff)
|
2009-02-13 22:48:01 +00:00
|
|
|
force_rebase=t
|
|
|
|
;;
|
2009-12-04 08:20:48 +00:00
|
|
|
--rerere-autoupdate|--no-rerere-autoupdate)
|
|
|
|
allow_rerere_autoupdate="$1"
|
|
|
|
;;
|
2006-02-14 22:42:05 +00:00
|
|
|
-*)
|
|
|
|
usage
|
|
|
|
;;
|
|
|
|
*)
|
|
|
|
break
|
|
|
|
;;
|
|
|
|
esac
|
|
|
|
shift
|
|
|
|
done
|
2009-02-18 13:44:02 +00:00
|
|
|
test $# -gt 2 && usage
|
2005-12-14 11:11:37 +00:00
|
|
|
|
2010-05-31 22:51:32 +00:00
|
|
|
if test $# -eq 0 && test -z "$rebase_root"
|
|
|
|
then
|
|
|
|
test -d "$dotest" -o -d "$GIT_DIR"/rebase-apply || usage
|
|
|
|
test -d "$dotest" -o -f "$GIT_DIR"/rebase-apply/rebasing &&
|
|
|
|
die 'A rebase is in progress, try --continue, --skip or --abort.'
|
|
|
|
fi
|
|
|
|
|
2008-07-21 10:51:02 +00:00
|
|
|
# Make sure we do not have $GIT_DIR/rebase-apply
|
2006-06-21 10:04:41 +00:00
|
|
|
if test -z "$do_merge"
|
2005-11-28 21:00:31 +00:00
|
|
|
then
|
2008-08-17 04:25:43 +00:00
|
|
|
if mkdir "$GIT_DIR"/rebase-apply 2>/dev/null
|
2006-06-21 10:04:41 +00:00
|
|
|
then
|
2008-07-21 10:51:02 +00:00
|
|
|
rmdir "$GIT_DIR"/rebase-apply
|
2006-06-21 10:04:41 +00:00
|
|
|
else
|
|
|
|
echo >&2 '
|
2008-08-17 04:25:43 +00:00
|
|
|
It seems that I cannot create a rebase-apply directory, and
|
|
|
|
I wonder if you are in the middle of patch application or another
|
2008-07-21 10:51:02 +00:00
|
|
|
rebase. If that is not the case, please
|
|
|
|
rm -fr '"$GIT_DIR"'/rebase-apply
|
2008-08-17 04:25:43 +00:00
|
|
|
and run me again. I am stopping in case you still have something
|
2008-07-21 10:51:02 +00:00
|
|
|
valuable there.'
|
2006-06-21 10:04:41 +00:00
|
|
|
exit 1
|
|
|
|
fi
|
|
|
|
else
|
|
|
|
if test -d "$dotest"
|
|
|
|
then
|
2008-07-16 01:33:44 +00:00
|
|
|
die "previous rebase directory $dotest still exists." \
|
2008-08-17 04:25:43 +00:00
|
|
|
'Try git rebase (--continue | --abort | --skip)'
|
2006-06-21 10:04:41 +00:00
|
|
|
fi
|
2005-11-28 21:00:31 +00:00
|
|
|
fi
|
|
|
|
|
Rewrite rebase to use git-format-patch piped to git-am.
The current rebase implementation finds commits in our tree but
not in the upstream tree using git-cherry, and tries to apply
them using git-cherry-pick (i.e. always use 3-way) one by one.
Which is fine, but when some of the changes do not apply
cleanly, it punts, and punts badly.
Suppose you have commits A-B-C-D-E since you forked from the
upstream and submitted the changes for inclusion. You fetch
from upstream head U and find that B has been picked up. You
run git-rebase to update your branch, which tries to apply
changes contained in A-C-D-E, in this order, but replaying of C
fails, because the upstream got changes that touch the same area
from elsewhere.
Now what?
It notes that fact, and goes ahead to apply D and E, and at the
very end tells you to deal with C by hand. Even if you somehow
managed to replay C on top of the result, you would now end up
with ...-B-...-U-A-D-E-C.
Breaking the order between B and others was the conscious
decision made by the upstream, so we would not worry about it,
and even if it were worrisome, it is too late for us to fix now.
What D and E do may well depend on having C applied before them,
which is a problem for us.
This rewrites rebase to use git-format-patch piped to git-am,
and when the patch does not apply, have git-am fall back on
3-way merge. The updated diff/patch pair knows how to apply
trivial binary patches as long as the pre- and post-images are
locally available, so this should work on a repository with
binary files as well.
The primary benefit of this change is that it makes rebase
easier to use when some of the changes do not replay cleanly.
In the "unapplicable patch in the middle" case, this "rebase"
works like this:
- A series of patches in e-mail form is created that records
what A-C-D-E do, and is fed to git-am. This is stored in
.dotest/ directory, just like the case you tried to apply
them from your mailbox. Your branch is rewound to the tip of
upstream U, and the original head is kept in .git/ORIG_HEAD,
so you could "git reset --hard ORIG_HEAD" in case the end
result is really messy.
- Patch A applies cleanly. This could either be a clean patch
application on top of rewound head (i.e. same as upstream
head), or git-am might have internally fell back on 3-way
(i.e. it would have done the same thing as git-cherry-pick).
In either case, a rebased commit A is made on top of U.
- Patch C does not apply. git-am stops here, with conflicts to
be resolved in the working tree. Yet-to-be-applied D and E
are still kept in .dotest/ directory at this point. What the
user does is exactly the same as fixing up unapplicable patch
when running git-am:
- Resolve conflict just like any merge conflicts.
- "git am --resolved --3way" to continue applying the patches.
- This applies the fixed-up patch so by definition it had
better apply. "git am" knows the patch after the fixed-up
one is D and then E; it applies them, and you will get the
changes from A-C-D-E commits on top of U, in this order.
I've been using this without noticing any problem, and as people
may know I do a lot of rebases.
Signed-off-by: Junio C Hamano <junkio@cox.net>
2005-11-14 08:41:53 +00:00
|
|
|
# The tree must be really really clean.
|
2009-08-05 14:56:25 +00:00
|
|
|
if ! git update-index --ignore-submodules --refresh > /dev/null; then
|
|
|
|
echo >&2 "cannot rebase: you have unstaged changes"
|
2009-09-09 14:59:37 +00:00
|
|
|
git diff-files --name-status -r --ignore-submodules -- >&2
|
2009-08-05 14:56:25 +00:00
|
|
|
exit 1
|
2008-12-10 09:25:19 +00:00
|
|
|
fi
|
2008-05-14 17:03:59 +00:00
|
|
|
diff=$(git diff-index --cached --name-status -r --ignore-submodules HEAD --)
|
2005-12-14 23:36:35 +00:00
|
|
|
case "$diff" in
|
2008-12-10 09:25:19 +00:00
|
|
|
?*) echo >&2 "cannot rebase: your index contains uncommitted changes"
|
|
|
|
echo >&2 "$diff"
|
Rewrite rebase to use git-format-patch piped to git-am.
The current rebase implementation finds commits in our tree but
not in the upstream tree using git-cherry, and tries to apply
them using git-cherry-pick (i.e. always use 3-way) one by one.
Which is fine, but when some of the changes do not apply
cleanly, it punts, and punts badly.
Suppose you have commits A-B-C-D-E since you forked from the
upstream and submitted the changes for inclusion. You fetch
from upstream head U and find that B has been picked up. You
run git-rebase to update your branch, which tries to apply
changes contained in A-C-D-E, in this order, but replaying of C
fails, because the upstream got changes that touch the same area
from elsewhere.
Now what?
It notes that fact, and goes ahead to apply D and E, and at the
very end tells you to deal with C by hand. Even if you somehow
managed to replay C on top of the result, you would now end up
with ...-B-...-U-A-D-E-C.
Breaking the order between B and others was the conscious
decision made by the upstream, so we would not worry about it,
and even if it were worrisome, it is too late for us to fix now.
What D and E do may well depend on having C applied before them,
which is a problem for us.
This rewrites rebase to use git-format-patch piped to git-am,
and when the patch does not apply, have git-am fall back on
3-way merge. The updated diff/patch pair knows how to apply
trivial binary patches as long as the pre- and post-images are
locally available, so this should work on a repository with
binary files as well.
The primary benefit of this change is that it makes rebase
easier to use when some of the changes do not replay cleanly.
In the "unapplicable patch in the middle" case, this "rebase"
works like this:
- A series of patches in e-mail form is created that records
what A-C-D-E do, and is fed to git-am. This is stored in
.dotest/ directory, just like the case you tried to apply
them from your mailbox. Your branch is rewound to the tip of
upstream U, and the original head is kept in .git/ORIG_HEAD,
so you could "git reset --hard ORIG_HEAD" in case the end
result is really messy.
- Patch A applies cleanly. This could either be a clean patch
application on top of rewound head (i.e. same as upstream
head), or git-am might have internally fell back on 3-way
(i.e. it would have done the same thing as git-cherry-pick).
In either case, a rebased commit A is made on top of U.
- Patch C does not apply. git-am stops here, with conflicts to
be resolved in the working tree. Yet-to-be-applied D and E
are still kept in .dotest/ directory at this point. What the
user does is exactly the same as fixing up unapplicable patch
when running git-am:
- Resolve conflict just like any merge conflicts.
- "git am --resolved --3way" to continue applying the patches.
- This applies the fixed-up patch so by definition it had
better apply. "git am" knows the patch after the fixed-up
one is D and then E; it applies them, and you will get the
changes from A-C-D-E commits on top of U, in this order.
I've been using this without noticing any problem, and as people
may know I do a lot of rebases.
Signed-off-by: Junio C Hamano <junkio@cox.net>
2005-11-14 08:41:53 +00:00
|
|
|
exit 1
|
|
|
|
;;
|
|
|
|
esac
|
2005-08-17 22:19:57 +00:00
|
|
|
|
2009-01-05 17:35:16 +00:00
|
|
|
if test -z "$rebase_root"
|
|
|
|
then
|
|
|
|
# The upstream head must be given. Make sure it is valid.
|
|
|
|
upstream_name="$1"
|
|
|
|
shift
|
|
|
|
upstream=`git rev-parse --verify "${upstream_name}^0"` ||
|
|
|
|
die "invalid upstream $upstream_name"
|
|
|
|
unset root_flag
|
|
|
|
upstream_arg="$upstream_name"
|
|
|
|
else
|
|
|
|
test -z "$newbase" && die "--root must be used with --onto"
|
|
|
|
unset upstream_name
|
|
|
|
unset upstream
|
|
|
|
root_flag="--root"
|
|
|
|
upstream_arg="$root_flag"
|
|
|
|
fi
|
2005-12-14 23:36:35 +00:00
|
|
|
|
2007-03-22 09:54:59 +00:00
|
|
|
# Make sure the branch to rebase onto is valid.
|
|
|
|
onto_name=${newbase-"$upstream_name"}
|
2010-01-07 11:05:02 +00:00
|
|
|
case "$onto_name" in
|
|
|
|
*...*)
|
|
|
|
if left=${onto_name%...*} right=${onto_name#*...} &&
|
|
|
|
onto=$(git merge-base --all ${left:-HEAD} ${right:-HEAD})
|
|
|
|
then
|
|
|
|
case "$onto" in
|
|
|
|
?*"$LF"?*)
|
|
|
|
die "$onto_name: there are more than one merge bases"
|
|
|
|
;;
|
|
|
|
'')
|
|
|
|
die "$onto_name: there is no merge base"
|
|
|
|
;;
|
|
|
|
esac
|
|
|
|
else
|
2009-11-20 11:02:44 +00:00
|
|
|
die "$onto_name: there is no merge base"
|
2010-01-07 11:05:02 +00:00
|
|
|
fi
|
|
|
|
;;
|
|
|
|
*)
|
2009-11-20 11:02:44 +00:00
|
|
|
onto=$(git rev-parse --verify "${onto_name}^0") || exit
|
2010-01-07 11:05:02 +00:00
|
|
|
;;
|
|
|
|
esac
|
2007-03-22 09:54:59 +00:00
|
|
|
|
2006-02-13 07:17:04 +00:00
|
|
|
# If a hook exists, give it a chance to interrupt
|
2009-01-05 17:35:16 +00:00
|
|
|
run_pre_rebase_hook "$upstream_arg" "$@"
|
2006-02-13 07:17:04 +00:00
|
|
|
|
2008-03-15 20:17:42 +00:00
|
|
|
# If the branch to rebase is given, that is the branch we will rebase
|
|
|
|
# $branch_name -- branch being rebased, or HEAD (already detached)
|
|
|
|
# $orig_head -- commit object name of tip of the branch before rebasing
|
|
|
|
# $head_name -- refs/heads/<that-branch> or "detached HEAD"
|
|
|
|
switch_to=
|
2005-06-25 09:23:43 +00:00
|
|
|
case "$#" in
|
2009-01-05 17:35:16 +00:00
|
|
|
1)
|
2008-03-15 20:17:42 +00:00
|
|
|
# Is it "rebase other $branchname" or "rebase other $commit"?
|
2009-01-05 17:35:16 +00:00
|
|
|
branch_name="$1"
|
|
|
|
switch_to="$1"
|
2008-03-15 20:17:42 +00:00
|
|
|
|
2009-01-05 17:35:16 +00:00
|
|
|
if git show-ref --verify --quiet -- "refs/heads/$1" &&
|
|
|
|
branch=$(git rev-parse -q --verify "refs/heads/$1")
|
2008-03-15 20:17:42 +00:00
|
|
|
then
|
2009-01-05 17:35:16 +00:00
|
|
|
head_name="refs/heads/$1"
|
|
|
|
elif branch=$(git rev-parse -q --verify "$1")
|
2008-03-15 20:17:42 +00:00
|
|
|
then
|
|
|
|
head_name="detached HEAD"
|
|
|
|
else
|
|
|
|
usage
|
|
|
|
fi
|
2006-02-14 22:42:05 +00:00
|
|
|
;;
|
|
|
|
*)
|
2008-03-15 20:17:42 +00:00
|
|
|
# Do not need to switch branches, we are already on it.
|
2007-01-21 03:11:29 +00:00
|
|
|
if branch_name=`git symbolic-ref -q HEAD`
|
|
|
|
then
|
2008-03-15 20:17:42 +00:00
|
|
|
head_name=$branch_name
|
2007-01-21 03:11:29 +00:00
|
|
|
branch_name=`expr "z$branch_name" : 'zrefs/heads/\(.*\)'`
|
|
|
|
else
|
2008-03-15 20:17:42 +00:00
|
|
|
head_name="detached HEAD"
|
2007-01-21 03:11:29 +00:00
|
|
|
branch_name=HEAD ;# detached
|
|
|
|
fi
|
2008-03-15 20:17:42 +00:00
|
|
|
branch=$(git rev-parse --verify "${branch_name}^0") || exit
|
2006-02-14 22:42:05 +00:00
|
|
|
;;
|
2005-06-25 09:23:43 +00:00
|
|
|
esac
|
2008-03-15 20:17:42 +00:00
|
|
|
orig_head=$branch
|
2005-06-25 09:23:43 +00:00
|
|
|
|
2009-01-05 17:35:16 +00:00
|
|
|
# Now we are rebasing commits $upstream..$branch (or with --root,
|
|
|
|
# everything leading up to $branch) on top of $onto
|
2006-02-14 22:42:05 +00:00
|
|
|
|
2007-07-04 20:09:10 +00:00
|
|
|
# Check if we are already based on $onto with linear history,
|
|
|
|
# but this should be done only when upstream and onto are the same.
|
2007-07-03 05:52:14 +00:00
|
|
|
mb=$(git merge-base "$onto" "$branch")
|
2007-07-04 20:09:10 +00:00
|
|
|
if test "$upstream" = "$onto" && test "$mb" = "$onto" &&
|
|
|
|
# linear history?
|
2009-11-23 23:56:32 +00:00
|
|
|
! (git rev-list --parents "$onto".."$branch" | sane_grep " .* ") > /dev/null
|
2005-11-28 21:00:31 +00:00
|
|
|
then
|
2009-02-13 22:48:01 +00:00
|
|
|
if test -z "$force_rebase"
|
|
|
|
then
|
|
|
|
# Lazily switch to the target branch if needed...
|
|
|
|
test -z "$switch_to" || git checkout "$switch_to"
|
2009-06-16 22:33:01 +00:00
|
|
|
say "Current branch $branch_name is up to date."
|
2009-02-13 22:48:01 +00:00
|
|
|
exit 0
|
|
|
|
else
|
2009-06-16 22:33:01 +00:00
|
|
|
say "Current branch $branch_name is up to date, rebase forced."
|
2009-02-13 22:48:01 +00:00
|
|
|
fi
|
2005-11-28 21:00:31 +00:00
|
|
|
fi
|
|
|
|
|
2008-03-15 20:17:42 +00:00
|
|
|
# Detach HEAD and reset the tree
|
2009-06-16 22:33:01 +00:00
|
|
|
say "First, rewinding head to replay your work on top of it..."
|
2008-07-14 21:05:35 +00:00
|
|
|
git checkout -q "$onto^0" || die "could not detach HEAD"
|
2008-07-07 07:16:38 +00:00
|
|
|
git update-ref ORIG_HEAD $branch
|
2005-12-14 23:36:35 +00:00
|
|
|
|
2009-03-01 22:11:38 +00:00
|
|
|
if test -n "$diffstat"
|
|
|
|
then
|
|
|
|
if test -n "$verbose"
|
|
|
|
then
|
|
|
|
echo "Changes from $mb to $onto:"
|
|
|
|
fi
|
|
|
|
# We want color (if set), but no pager
|
|
|
|
GIT_PAGER='' git diff --stat --summary "$mb" "$onto"
|
|
|
|
fi
|
|
|
|
|
2006-02-14 22:42:05 +00:00
|
|
|
# If the $onto is a proper descendant of the tip of the branch, then
|
2009-10-24 08:31:32 +00:00
|
|
|
# we just fast-forwarded.
|
2006-07-27 09:32:25 +00:00
|
|
|
if test "$mb" = "$branch"
|
2005-12-14 23:36:35 +00:00
|
|
|
then
|
2009-06-16 22:33:01 +00:00
|
|
|
say "Fast-forwarded $branch_name to $onto_name."
|
2007-11-08 18:19:08 +00:00
|
|
|
move_to_original_branch
|
2005-12-14 23:36:35 +00:00
|
|
|
exit 0
|
|
|
|
fi
|
|
|
|
|
2009-01-05 17:35:16 +00:00
|
|
|
if test -n "$rebase_root"
|
|
|
|
then
|
|
|
|
revisions="$onto..$orig_head"
|
|
|
|
else
|
|
|
|
revisions="$upstream..$orig_head"
|
|
|
|
fi
|
|
|
|
|
2006-06-21 10:04:41 +00:00
|
|
|
if test -z "$do_merge"
|
|
|
|
then
|
2008-03-15 20:17:42 +00:00
|
|
|
git format-patch -k --stdout --full-index --ignore-if-in-upstream \
|
2009-01-05 17:35:16 +00:00
|
|
|
$root_flag "$revisions" |
|
2008-03-04 08:25:06 +00:00
|
|
|
git am $git_am_opt --rebasing --resolvemsg="$RESOLVEMSG" &&
|
2007-11-08 18:19:08 +00:00
|
|
|
move_to_original_branch
|
|
|
|
ret=$?
|
2008-07-21 10:51:02 +00:00
|
|
|
test 0 != $ret -a -d "$GIT_DIR"/rebase-apply &&
|
|
|
|
echo $head_name > "$GIT_DIR"/rebase-apply/head-name &&
|
|
|
|
echo $onto > "$GIT_DIR"/rebase-apply/onto &&
|
2009-06-16 22:33:01 +00:00
|
|
|
echo $orig_head > "$GIT_DIR"/rebase-apply/orig-head &&
|
|
|
|
echo "$GIT_QUIET" > "$GIT_DIR"/rebase-apply/quiet
|
2007-11-08 18:19:08 +00:00
|
|
|
exit $ret
|
2006-06-21 10:04:41 +00:00
|
|
|
fi
|
|
|
|
|
|
|
|
# start doing a rebase with git-merge
|
|
|
|
# this is rename-aware if the recursive (default) strategy is used
|
|
|
|
|
|
|
|
mkdir -p "$dotest"
|
|
|
|
echo "$onto" > "$dotest/onto"
|
2006-12-28 07:34:56 +00:00
|
|
|
echo "$onto_name" > "$dotest/onto_name"
|
2007-11-08 18:19:08 +00:00
|
|
|
prev_head=$orig_head
|
2006-06-21 10:04:41 +00:00
|
|
|
echo "$prev_head" > "$dotest/prev_head"
|
2007-11-08 18:19:08 +00:00
|
|
|
echo "$orig_head" > "$dotest/orig-head"
|
|
|
|
echo "$head_name" > "$dotest/head-name"
|
2009-06-16 22:33:01 +00:00
|
|
|
echo "$GIT_QUIET" > "$dotest/quiet"
|
2006-06-21 10:04:41 +00:00
|
|
|
|
|
|
|
msgnum=0
|
2009-01-05 17:35:16 +00:00
|
|
|
for cmt in `git rev-list --reverse --no-merges "$revisions"`
|
2006-06-21 10:04:41 +00:00
|
|
|
do
|
|
|
|
msgnum=$(($msgnum + 1))
|
2006-06-22 08:44:54 +00:00
|
|
|
echo "$cmt" > "$dotest/cmt.$msgnum"
|
2006-06-21 10:04:41 +00:00
|
|
|
done
|
|
|
|
|
2006-06-22 08:44:54 +00:00
|
|
|
echo 1 >"$dotest/msgnum"
|
|
|
|
echo $msgnum >"$dotest/end"
|
2006-06-21 10:04:41 +00:00
|
|
|
|
|
|
|
end=$msgnum
|
|
|
|
msgnum=1
|
|
|
|
|
|
|
|
while test "$msgnum" -le "$end"
|
|
|
|
do
|
|
|
|
call_merge "$msgnum"
|
|
|
|
continue_merge
|
|
|
|
done
|
2006-05-14 03:34:08 +00:00
|
|
|
|
2006-06-21 10:04:41 +00:00
|
|
|
finish_rb_merge
|