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Merge branch 'sh/rebase-i-p'
* sh/rebase-i-p: git-rebase--interactive.sh: comparision with == is bashism rebase-i-p: minimum fix to obvious issues rebase-i-p: if todo was reordered use HEAD as the rewritten parent rebase-i-p: do not include non-first-parent commits touching UPSTREAM rebase-i-p: only list commits that require rewriting in todo rebase-i-p: fix 'no squashing merges' tripping up non-merges rebase-i-p: delay saving current-commit to REWRITTEN if squashing rebase-i-p: use HEAD for updating the ref instead of mapping OLDHEAD rebase-i-p: test to exclude commits from todo based on its parents
This commit is contained in:
Junio C Hamano
commit
7ff866eb1b
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@ -173,13 +173,18 @@ pick_one_preserving_merges () {
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if test -f "$DOTEST"/current-commit
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then
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current_commit=$(cat "$DOTEST"/current-commit) &&
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git rev-parse HEAD > "$REWRITTEN"/$current_commit &&
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rm "$DOTEST"/current-commit ||
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die "Cannot write current commit's replacement sha1"
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if test "$fast_forward" = t
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then
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cat "$DOTEST"/current-commit | while read current_commit
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do
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git rev-parse HEAD > "$REWRITTEN"/$current_commit
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done
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rm "$DOTEST"/current-commit ||
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die "Cannot write current commit's replacement sha1"
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fi
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fi
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echo $sha1 > "$DOTEST"/current-commit
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echo $sha1 >> "$DOTEST"/current-commit
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# rewrite parents; if none were rewritten, we can fast-forward.
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new_parents=
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@ -192,6 +197,15 @@ pick_one_preserving_merges () {
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if test -f "$REWRITTEN"/$p
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then
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new_p=$(cat "$REWRITTEN"/$p)
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# If the todo reordered commits, and our parent is marked for
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# rewriting, but hasn't been gotten to yet, assume the user meant to
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# drop it on top of the current HEAD
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if test -z "$new_p"
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then
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new_p=$(git rev-parse HEAD)
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fi
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test $p != $new_p && fast_forward=f
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case "$new_parents" in
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*$new_p*)
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@ -217,15 +231,19 @@ pick_one_preserving_merges () {
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die "Cannot fast forward to $sha1"
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;;
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f)
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test "a$1" = a-n && die "Refusing to squash a merge: $sha1"
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first_parent=$(expr "$new_parents" : ' \([^ ]*\)')
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# detach HEAD to current parent
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output git checkout $first_parent 2> /dev/null ||
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die "Cannot move HEAD to $first_parent"
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if [ "$1" != "-n" ]
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then
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# detach HEAD to current parent
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output git checkout $first_parent 2> /dev/null ||
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die "Cannot move HEAD to $first_parent"
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fi
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case "$new_parents" in
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' '*' '*)
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test "a$1" = a-n && die "Refusing to squash a merge: $sha1"
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# redo merge
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author_script=$(get_author_ident_from_commit $sha1)
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eval "$author_script"
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@ -379,20 +397,7 @@ do_next () {
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HEADNAME=$(cat "$DOTEST"/head-name) &&
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OLDHEAD=$(cat "$DOTEST"/head) &&
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SHORTONTO=$(git rev-parse --short $(cat "$DOTEST"/onto)) &&
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if test -d "$REWRITTEN"
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then
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test -f "$DOTEST"/current-commit &&
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current_commit=$(cat "$DOTEST"/current-commit) &&
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git rev-parse HEAD > "$REWRITTEN"/$current_commit
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if test -f "$REWRITTEN"/$OLDHEAD
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then
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NEWHEAD=$(cat "$REWRITTEN"/$OLDHEAD)
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else
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NEWHEAD=$OLDHEAD
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fi
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else
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NEWHEAD=$(git rev-parse HEAD)
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fi &&
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NEWHEAD=$(git rev-parse HEAD) &&
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case $HEADNAME in
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refs/*)
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message="$GIT_REFLOG_ACTION: $HEADNAME onto $SHORTONTO)" &&
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@ -591,18 +596,69 @@ first and then run 'git rebase --continue' again."
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echo $ONTO > "$REWRITTEN"/$c ||
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die "Could not init rewritten commits"
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done
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# No cherry-pick because our first pass is to determine
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# parents to rewrite and skipping dropped commits would
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# prematurely end our probe
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MERGES_OPTION=
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first_after_upstream="$(git rev-list --reverse --first-parent $UPSTREAM..$HEAD | head -n 1)"
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else
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MERGES_OPTION=--no-merges
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MERGES_OPTION="--no-merges --cherry-pick"
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fi
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SHORTUPSTREAM=$(git rev-parse --short $UPSTREAM)
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SHORTHEAD=$(git rev-parse --short $HEAD)
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SHORTONTO=$(git rev-parse --short $ONTO)
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git rev-list $MERGES_OPTION --pretty=oneline --abbrev-commit \
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--abbrev=7 --reverse --left-right --cherry-pick \
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--abbrev=7 --reverse --left-right --topo-order \
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$UPSTREAM...$HEAD | \
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sed -n "s/^>/pick /p" > "$TODO"
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sed -n "s/^>//p" | while read shortsha1 rest
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do
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if test t != "$PRESERVE_MERGES"
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then
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echo "pick $shortsha1 $rest" >> "$TODO"
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else
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sha1=$(git rev-parse $shortsha1)
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preserve=t
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for p in $(git rev-list --parents -1 $sha1 | cut -d' ' -f2-)
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do
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if test -f "$REWRITTEN"/$p -a \( $p != $UPSTREAM -o $sha1 = $first_after_upstream \)
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then
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preserve=f
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fi
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done
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if test f = "$preserve"
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then
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touch "$REWRITTEN"/$sha1
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echo "pick $shortsha1 $rest" >> "$TODO"
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fi
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fi
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done
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# Watch for commits that been dropped by --cherry-pick
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if test t = "$PRESERVE_MERGES"
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then
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mkdir "$DROPPED"
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# Save all non-cherry-picked changes
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git rev-list $UPSTREAM...$HEAD --left-right --cherry-pick | \
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sed -n "s/^>//p" > "$DOTEST"/not-cherry-picks
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# Now all commits and note which ones are missing in
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# not-cherry-picks and hence being dropped
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git rev-list $UPSTREAM..$HEAD |
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while read rev
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do
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if test -f "$REWRITTEN"/$rev -a "$(grep "$rev" "$DOTEST"/not-cherry-picks)" = ""
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then
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# Use -f2 because if rev-list is telling us this commit is
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# not worthwhile, we don't want to track its multiple heads,
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# just the history of its first-parent for others that will
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# be rebasing on top of it
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git rev-list --parents -1 $rev | cut -d' ' -f2 > "$DROPPED"/$rev
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short=$(git rev-list -1 --abbrev-commit --abbrev=7 $rev)
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grep -v "^[a-z][a-z]* $short" <"$TODO" > "${TODO}2" ; mv "${TODO}2" "$TODO"
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rm "$REWRITTEN"/$rev
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fi
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done
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fi
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test -s "$TODO" || echo noop >> "$TODO"
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cat >> "$TODO" << EOF
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@ -618,28 +674,6 @@ first and then run 'git rebase --continue' again."
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#
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EOF
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# Watch for commits that been dropped by --cherry-pick
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if test t = "$PRESERVE_MERGES"
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then
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mkdir "$DROPPED"
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# drop the --cherry-pick parameter this time
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git rev-list $MERGES_OPTION --abbrev-commit \
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--abbrev=7 $UPSTREAM...$HEAD --left-right | \
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sed -n "s/^>//p" | while read rev
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do
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grep --quiet "$rev" "$TODO"
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if [ $? -ne 0 ]
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then
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# Use -f2 because if rev-list is telling this commit is not
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# worthwhile, we don't want to track its multiple heads,
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# just the history of its first-parent for others that will
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# be rebasing on top of us
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full=$(git rev-parse $rev)
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git rev-list --parents -1 $rev | cut -d' ' -f2 > "$DROPPED"/$full
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fi
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done
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fi
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has_action "$TODO" ||
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die_abort "Nothing to do"
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135
t/t3411-rebase-preserve-around-merges.sh
Normal file
135
t/t3411-rebase-preserve-around-merges.sh
Normal file
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@ -0,0 +1,135 @@
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#!/bin/sh
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#
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# Copyright (c) 2008 Stephen Haberman
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#
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test_description='git rebase preserve merges
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This test runs git rebase with and tries to squash a commit from after a merge
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to before the merge.
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'
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. ./test-lib.sh
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# Copy/paste from t3404-rebase-interactive.sh
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echo "#!$SHELL_PATH" >fake-editor.sh
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cat >> fake-editor.sh <<\EOF
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case "$1" in
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*/COMMIT_EDITMSG)
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test -z "$FAKE_COMMIT_MESSAGE" || echo "$FAKE_COMMIT_MESSAGE" > "$1"
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test -z "$FAKE_COMMIT_AMEND" || echo "$FAKE_COMMIT_AMEND" >> "$1"
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exit
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;;
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esac
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test -z "$EXPECT_COUNT" ||
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test "$EXPECT_COUNT" = $(sed -e '/^#/d' -e '/^$/d' < "$1" | wc -l) ||
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exit
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test -z "$FAKE_LINES" && exit
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grep -v '^#' < "$1" > "$1".tmp
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rm -f "$1"
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cat "$1".tmp
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action=pick
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for line in $FAKE_LINES; do
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case $line in
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squash|edit)
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action="$line";;
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*)
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echo sed -n "${line}s/^pick/$action/p"
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sed -n "${line}p" < "$1".tmp
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sed -n "${line}s/^pick/$action/p" < "$1".tmp >> "$1"
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action=pick;;
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esac
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done
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EOF
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test_set_editor "$(pwd)/fake-editor.sh"
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chmod a+x fake-editor.sh
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# set up two branches like this:
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#
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# A1 - B1 - D1 - E1 - F1
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# \ /
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# -- C1 --
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test_expect_success 'setup' '
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touch a &&
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touch b &&
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git add a &&
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git commit -m A1 &&
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git tag A1
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git add b &&
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git commit -m B1 &&
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git tag B1 &&
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git checkout -b branch &&
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touch c &&
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git add c &&
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git commit -m C1 &&
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git checkout master &&
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touch d &&
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git add d &&
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git commit -m D1 &&
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git merge branch &&
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touch f &&
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git add f &&
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git commit -m F1 &&
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git tag F1
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'
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# Should result in:
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#
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# A1 - B1 - D2 - E2
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# \ /
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# -- C1 --
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#
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test_expect_success 'squash F1 into D1' '
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FAKE_LINES="1 squash 3 2" git rebase -i -p B1 &&
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test "$(git rev-parse HEAD^2)" = "$(git rev-parse branch)" &&
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test "$(git rev-parse HEAD~2)" = "$(git rev-parse B1)" &&
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git tag E2
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'
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# Start with:
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#
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# A1 - B1 - D2 - E2
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# \
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# G1 ---- L1 ---- M1
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# \ /
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# H1 -- J1 -- K1
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# \ /
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# -- I1 --
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#
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# And rebase G1..M1 onto E2
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test_expect_success 'rebase two levels of merge' '
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git checkout -b branch2 A1 &&
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touch g &&
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git add g &&
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git commit -m G1 &&
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git checkout -b branch3 &&
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touch h
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git add h &&
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git commit -m H1 &&
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git checkout -b branch4 &&
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touch i &&
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git add i &&
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git commit -m I1 &&
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git tag I1 &&
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git checkout branch3 &&
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touch j &&
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git add j &&
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git commit -m J1 &&
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git merge I1 --no-commit &&
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git commit -m K1 &&
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git tag K1 &&
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git checkout branch2 &&
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touch l &&
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git add l &&
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git commit -m L1 &&
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git merge K1 --no-commit &&
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git commit -m M1 &&
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GIT_EDITOR=: git rebase -i -p E2 &&
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test "$(git rev-parse HEAD~3)" = "$(git rev-parse E2)" &&
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test "$(git rev-parse HEAD~2)" = "$(git rev-parse HEAD^2^2~2)" &&
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test "$(git rev-parse HEAD^2^1^1)" = "$(git rev-parse HEAD^2^2^1)"
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'
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test_done
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