diff options
| -rw-r--r-- | .gitignore | 1 | ||||
| -rw-r--r-- | Makefile | 2 | ||||
| -rw-r--r-- | git-rebase--preserve-merges.sh | 1069 |
3 files changed, 1072 insertions, 0 deletions
diff --git a/.gitignore b/.gitignore index 833ef3b0b7..ef4925485b 100644 --- a/.gitignore +++ b/.gitignore @@ -117,6 +117,7 @@ /git-rebase--helper /git-rebase--interactive /git-rebase--merge +/git-rebase--preserve-merges /git-receive-pack /git-reflog /git-remote @@ -582,6 +582,7 @@ SCRIPT_LIB += git-mergetool--lib SCRIPT_LIB += git-parse-remote SCRIPT_LIB += git-rebase--am SCRIPT_LIB += git-rebase--interactive +SCRIPT_LIB += git-rebase--preserve-merges SCRIPT_LIB += git-rebase--merge SCRIPT_LIB += git-sh-setup SCRIPT_LIB += git-sh-i18n @@ -2271,6 +2272,7 @@ LOCALIZED_C = $(C_OBJ:o=c) $(LIB_H) $(GENERATED_H) LOCALIZED_SH = $(SCRIPT_SH) LOCALIZED_SH += git-parse-remote.sh LOCALIZED_SH += git-rebase--interactive.sh +LOCALIZED_SH += git-rebase--preserve-merges.sh LOCALIZED_SH += git-sh-setup.sh LOCALIZED_PERL = $(SCRIPT_PERL) diff --git a/git-rebase--preserve-merges.sh b/git-rebase--preserve-merges.sh new file mode 100644 index 0000000000..2f4941d0fc --- /dev/null +++ b/git-rebase--preserve-merges.sh @@ -0,0 +1,1069 @@ +# This shell script fragment is sourced by git-rebase to implement +# its interactive mode. "git rebase --interactive" makes it easy +# to fix up commits in the middle of a series and rearrange commits. +# +# Copyright (c) 2006 Johannes E. Schindelin +# +# The original idea comes from Eric W. Biederman, in +# https://public-inbox.org/git/m1odwkyuf5.fsf_-_@ebiederm.dsl.xmission.com/ +# +# The file containing rebase commands, comments, and empty lines. +# This file is created by "git rebase -i" then edited by the user. As +# the lines are processed, they are removed from the front of this +# file and written to the tail of $done. +todo="$state_dir"/git-rebase-todo + +# The rebase command lines that have already been processed. A line +# is moved here when it is first handled, before any associated user +# actions. +done="$state_dir"/done + +# The commit message that is planned to be used for any changes that +# need to be committed following a user interaction. +msg="$state_dir"/message + +# The file into which is accumulated the suggested commit message for +# squash/fixup commands. When the first of a series of squash/fixups +# is seen, the file is created and the commit message from the +# previous commit and from the first squash/fixup commit are written +# to it. The commit message for each subsequent squash/fixup commit +# is appended to the file as it is processed. +# +# The first line of the file is of the form +# # This is a combination of $count commits. +# where $count is the number of commits whose messages have been +# written to the file so far (including the initial "pick" commit). +# Each time that a commit message is processed, this line is read and +# updated. It is deleted just before the combined commit is made. +squash_msg="$state_dir"/message-squash + +# If the current series of squash/fixups has not yet included a squash +# command, then this file exists and holds the commit message of the +# original "pick" commit. (If the series ends without a "squash" +# command, then this can be used as the commit message of the combined +# commit without opening the editor.) +fixup_msg="$state_dir"/message-fixup + +# $rewritten is the name of a directory containing files for each +# commit that is reachable by at least one merge base of $head and +# $upstream. They are not necessarily rewritten, but their children +# might be. This ensures that commits on merged, but otherwise +# unrelated side branches are left alone. (Think "X" in the man page's +# example.) +rewritten="$state_dir"/rewritten + +dropped="$state_dir"/dropped + +end="$state_dir"/end +msgnum="$state_dir"/msgnum + +# A script to set the GIT_AUTHOR_NAME, GIT_AUTHOR_EMAIL, and +# GIT_AUTHOR_DATE that will be used for the commit that is currently +# being rebased. +author_script="$state_dir"/author-script + +# When an "edit" rebase command is being processed, the SHA1 of the +# commit to be edited is recorded in this file. When "git rebase +# --continue" is executed, if there are any staged changes then they +# will be amended to the HEAD commit, but only provided the HEAD +# commit is still the commit to be edited. When any other rebase +# command is processed, this file is deleted. +amend="$state_dir"/amend + +# For the post-rewrite hook, we make a list of rewritten commits and +# their new sha1s. The rewritten-pending list keeps the sha1s of +# commits that have been processed, but not committed yet, +# e.g. because they are waiting for a 'squash' command. +rewritten_list="$state_dir"/rewritten-list +rewritten_pending="$state_dir"/rewritten-pending + +# Work around Git for Windows' Bash whose "read" does not strip CRLF +# and leaves CR at the end instead. +cr=$(printf "\015") + +strategy_args=${strategy:+--strategy=$strategy} +test -n "$strategy_opts" && +eval ' + for strategy_opt in '"$strategy_opts"' + do + strategy_args="$strategy_args -X$(git rev-parse --sq-quote "${strategy_opt#--}")" + done +' + +GIT_CHERRY_PICK_HELP="$resolvemsg" +export GIT_CHERRY_PICK_HELP + +comment_char=$(git config --get core.commentchar 2>/dev/null) +case "$comment_char" in +'' | auto) + comment_char="#" + ;; +?) + ;; +*) + comment_char=$(echo "$comment_char" | cut -c1) + ;; +esac + +warn () { + printf '%s\n' "$*" >&2 +} + +# Output the commit message for the specified commit. +commit_message () { + git cat-file commit "$1" | sed "1,/^$/d" +} + +orig_reflog_action="$GIT_REFLOG_ACTION" + +comment_for_reflog () { + case "$orig_reflog_action" in + ''|rebase*) + GIT_REFLOG_ACTION="rebase -i ($1)" + export GIT_REFLOG_ACTION + ;; + esac +} + +last_count= +mark_action_done () { + sed -e 1q < "$todo" >> "$done" + sed -e 1d < "$todo" >> "$todo".new + mv -f "$todo".new "$todo" + new_count=$(( $(git stripspace --strip-comments <"$done" | wc -l) )) + echo $new_count >"$msgnum" + total=$(($new_count + $(git stripspace --strip-comments <"$todo" | wc -l))) + echo $total >"$end" + if test "$last_count" != "$new_count" + then + last_count=$new_count + eval_gettext "Rebasing (\$new_count/\$total)"; printf "\r" + test -z "$verbose" || echo + fi +} + +# Put the last action marked done at the beginning of the todo list +# again. If there has not been an action marked done yet, leave the list of +# items on the todo list unchanged. +reschedule_last_action () { + tail -n 1 "$done" | cat - "$todo" >"$todo".new + sed -e \$d <"$done" >"$done".new + mv -f "$todo".new "$todo" + mv -f "$done".new "$done" +} + +append_todo_help () { + gettext " +Commands: +p, pick <commit> = use commit +r, reword <commit> = use commit, but edit the commit message +e, edit <commit> = use commit, but stop for amending +s, squash <commit> = use commit, but meld into previous commit +f, fixup <commit> = like \"squash\", but discard this commit's log message +x, exec <commit> = run command (the rest of the line) using shell +d, drop <commit> = remove commit +l, label <label> = label current HEAD with a name +t, reset <label> = reset HEAD to a label +m, merge [-C <commit> | -c <commit>] <label> [# <oneline>] +. create a merge commit using the original merge commit's +. message (or the oneline, if no original merge commit was +. specified). Use -c <commit> to reword the commit message. + +These lines can be re-ordered; they are executed from top to bottom. +" | git stripspace --comment-lines >>"$todo" + + if test $(get_missing_commit_check_level) = error + then + gettext " +Do not remove any line. Use 'drop' explicitly to remove a commit. +" | git stripspace --comment-lines >>"$todo" + else + gettext " +If you remove a line here THAT COMMIT WILL BE LOST. +" | git stripspace --comment-lines >>"$todo" + fi +} + +make_patch () { + sha1_and_parents="$(git rev-list --parents -1 "$1")" + case "$sha1_and_parents" in + ?*' '?*' '?*) + git diff --cc $sha1_and_parents + ;; + ?*' '?*) + git diff-tree -p "$1^!" + ;; + *) + echo "Root commit" + ;; + esac > "$state_dir"/patch + test -f "$msg" || + commit_message "$1" > "$msg" + test -f "$author_script" || + get_author_ident_from_commit "$1" > "$author_script" +} + +die_with_patch () { + echo "$1" > "$state_dir"/stopped-sha + git update-ref REBASE_HEAD "$1" + make_patch "$1" + die "$2" +} + +exit_with_patch () { + echo "$1" > "$state_dir"/stopped-sha + git update-ref REBASE_HEAD "$1" + make_patch $1 + git rev-parse --verify HEAD > "$amend" + gpg_sign_opt_quoted=${gpg_sign_opt:+$(git rev-parse --sq-quote "$gpg_sign_opt")} + warn "$(eval_gettext "\ +You can amend the commit now, with + + git commit --amend \$gpg_sign_opt_quoted + +Once you are satisfied with your changes, run + + git rebase --continue")" + warn + exit $2 +} + +die_abort () { + apply_autostash + rm -rf "$state_dir" + die "$1" +} + +has_action () { + test -n "$(git stripspace --strip-comments <"$1")" +} + +is_empty_commit() { + tree=$(git rev-parse -q --verify "$1"^{tree} 2>/dev/null) || { + sha1=$1 + die "$(eval_gettext "\$sha1: not a commit that can be picked")" + } + ptree=$(git rev-parse -q --verify "$1"^^{tree} 2>/dev/null) || + ptree=4b825dc642cb6eb9a060e54bf8d69288fbee4904 + test "$tree" = "$ptree" +} + +is_merge_commit() +{ + git rev-parse --verify --quiet "$1"^2 >/dev/null 2>&1 +} + +# Run command with GIT_AUTHOR_NAME, GIT_AUTHOR_EMAIL, and +# GIT_AUTHOR_DATE exported from the current environment. +do_with_author () { + ( + export GIT_AUTHOR_NAME GIT_AUTHOR_EMAIL GIT_AUTHOR_DATE + "$@" + ) +} + +git_sequence_editor () { + if test -z "$GIT_SEQUENCE_EDITOR" + then + GIT_SEQUENCE_EDITOR="$(git config sequence.editor)" + if [ -z "$GIT_SEQUENCE_EDITOR" ] + then + GIT_SEQUENCE_EDITOR="$(git var GIT_EDITOR)" || return $? + fi + fi + + eval "$GIT_SEQUENCE_EDITOR" '"$@"' +} + +pick_one () { + ff=--ff + + case "$1" in -n) sha1=$2; ff= ;; *) sha1=$1 ;; esac + case "$force_rebase" in '') ;; ?*) ff= ;; esac + output git rev-parse --verify $sha1 || die "$(eval_gettext "Invalid commit name: \$sha1")" + + if is_empty_commit "$sha1" + then + empty_args="--allow-empty" + fi + + test -d "$rewritten" && + pick_one_preserving_merges "$@" && return + output eval git cherry-pick $allow_rerere_autoupdate $allow_empty_message \ + ${gpg_sign_opt:+$(git rev-parse --sq-quote "$gpg_sign_opt")} \ + $signoff "$strategy_args" $empty_args $ff "$@" + + # If cherry-pick dies it leaves the to-be-picked commit unrecorded. Reschedule + # previous task so this commit is not lost. + ret=$? + case "$ret" in [01]) ;; *) reschedule_last_action ;; esac + return $ret +} + +pick_one_preserving_merges () { + fast_forward=t + case "$1" in + -n) + fast_forward=f + sha1=$2 + ;; + *) + sha1=$1 + ;; + esac + sha1=$(git rev-parse $sha1) + + if test -f "$state_dir"/current-commit && test "$fast_forward" = t + then + while read current_commit + do + git rev-parse HEAD > "$rewritten"/$current_commit + done <"$state_dir"/current-commit + rm "$state_dir"/current-commit || + die "$(gettext "Cannot write current commit's replacement sha1")" + fi + + echo $sha1 >> "$state_dir"/current-commit + + # rewrite parents; if none were rewritten, we can fast-forward. + new_parents= + pend=" $(git rev-list --parents -1 $sha1 | cut -d' ' -s -f2-)" + if test "$pend" = " " + then + pend=" root" + fi + while [ "$pend" != "" ] + do + p=$(expr "$pend" : ' \([^ ]*\)') + pend="${pend# $p}" + + if test -f "$rewritten"/$p + then + new_p=$(cat "$rewritten"/$p) + + # If the todo reordered commits, and our parent is marked for + # rewriting, but hasn't been gotten to yet, assume the user meant to + # drop it on top of the current HEAD + if test -z "$new_p" + then + new_p=$(git rev-parse HEAD) + fi + + test $p != $new_p && fast_forward=f + case "$new_parents" in + *$new_p*) + ;; # do nothing; that parent is already there + *) + new_parents="$new_parents $new_p" + ;; + esac + else + if test -f "$dropped"/$p + then + fast_forward=f + replacement="$(cat "$dropped"/$p)" + test -z "$replacement" && replacement=root + pend=" $replacement$pend" + else + new_parents="$new_parents $p" + fi + fi + done + case $fast_forward in + t) + output warn "$(eval_gettext "Fast-forward to \$sha1")" + output git reset --hard $sha1 || + die "$(eval_gettext "Cannot fast-forward to \$sha1")" + ;; + f) + first_parent=$(expr "$new_parents" : ' \([^ ]*\)') + + if [ "$1" != "-n" ] + then + # detach HEAD to current parent + output git checkout $first_parent 2> /dev/null || + die "$(eval_gettext "Cannot move HEAD to \$first_parent")" + fi + + case "$new_parents" in + ' '*' '*) + test "a$1" = a-n && die "$(eval_gettext "Refusing to squash a merge: \$sha1")" + + # redo merge + author_script_content=$(get_author_ident_from_commit $sha1) + eval "$author_script_content" + msg_content="$(commit_message $sha1)" + # No point in merging the first parent, that's HEAD + new_parents=${new_parents# $first_parent} + merge_args="--no-log --no-ff" + if ! do_with_author output eval \ + git merge ${gpg_sign_opt:+$(git rev-parse \ + --sq-quote "$gpg_sign_opt")} \ + $allow_rerere_autoupdate "$merge_args" \ + "$strategy_args" \ + -m "$(git rev-parse --sq-quote "$msg_content")" \ + "$new_parents" + then + printf "%s\n" "$msg_content" > "$GIT_DIR"/MERGE_MSG + die_with_patch $sha1 "$(eval_gettext "Error redoing merge \$sha1")" + fi + echo "$sha1 $(git rev-parse HEAD^0)" >> "$rewritten_list" + ;; + *) + output eval git cherry-pick $allow_rerere_autoupdate \ + $allow_empty_message \ + ${gpg_sign_opt:+$(git rev-parse --sq-quote "$gpg_sign_opt")} \ + "$strategy_args" "$@" || + die_with_patch $sha1 "$(eval_gettext "Could not pick \$sha1")" + ;; + esac + ;; + esac +} + +this_nth_commit_message () { + n=$1 + eval_gettext "This is the commit message #\${n}:" +} + +skip_nth_commit_message () { + n=$1 + eval_gettext "The commit message #\${n} will be skipped:" +} + +update_squash_messages () { + if test -f "$squash_msg"; then + mv "$squash_msg" "$squash_msg".bak || exit + count=$(($(sed -n \ + -e "1s/^$comment_char[^0-9]*\([0-9][0-9]*\).*/\1/p" \ + -e "q" < "$squash_msg".bak)+1)) + { + printf '%s\n' "$comment_char $(eval_ngettext \ + "This is a combination of \$count commit." \ + "This is a combination of \$count commits." \ + $count)" + sed -e 1d -e '2,/^./{ + /^$/d + }' <"$squash_msg".bak + } >"$squash_msg" + else + commit_message HEAD >"$fixup_msg" || + die "$(eval_gettext "Cannot write \$fixup_msg")" + count=2 + { + printf '%s\n' "$comment_char $(gettext "This is a combination of 2 commits.")" + printf '%s\n' "$comment_char $(gettext "This is the 1st commit message:")" + echo + cat "$fixup_msg" + } >"$squash_msg" + fi + case $1 in + squash) + rm -f "$fixup_msg" + echo + printf '%s\n' "$comment_char $(this_nth_commit_message $count)" + echo + commit_message $2 + ;; + fixup) + echo + printf '%s\n' "$comment_char $(skip_nth_commit_message $count)" + echo + # Change the space after the comment character to TAB: + commit_message $2 | git stripspace --comment-lines | sed -e 's/ / /' + ;; + esac >>"$squash_msg" +} + +peek_next_command () { + git stripspace --strip-comments <"$todo" | sed -n -e 's/ .*//p' -e q +} + +# A squash/fixup has failed. Prepare the long version of the squash +# commit message, then die_with_patch. This code path requires the +# user to edit the combined commit message for all commits that have +# been squashed/fixedup so far. So also erase the old squash +# messages, effectively causing the combined commit to be used as the +# new basis for any further squash/fixups. Args: sha1 rest +die_failed_squash() { + sha1=$1 + rest=$2 + mv "$squash_msg" "$msg" || exit + rm -f "$fixup_msg" + cp "$msg" "$GIT_DIR"/MERGE_MSG || exit + warn + warn "$(eval_gettext "Could not apply \$sha1... \$rest")" + die_with_patch $sha1 "" +} + +flush_rewritten_pending() { + test -s "$rewritten_pending" || return + newsha1="$(git rev-parse HEAD^0)" + sed "s/$/ $newsha1/" < "$rewritten_pending" >> "$rewritten_list" + rm -f "$rewritten_pending" +} + +record_in_rewritten() { + oldsha1="$(git rev-parse $1)" + echo "$oldsha1" >> "$rewritten_pending" + + case "$(peek_next_command)" in + squash|s|fixup|f) + ;; + *) + flush_rewritten_pending + ;; + esac +} + +do_pick () { + sha1=$1 + rest=$2 + if test "$(git rev-parse HEAD)" = "$squash_onto" + then + # Set the correct commit message and author info on the + # sentinel root before cherry-picking the original changes + # without committing (-n). Finally, update the sentinel again + # to include these changes. If the cherry-pick results in a + # conflict, this means our behaviour is similar to a standard + # failed cherry-pick during rebase, with a dirty index to + # resolve before manually running git commit --amend then git + # rebase --continue. + git commit --allow-empty --allow-empty-message --amend \ + --no-post-rewrite -n -q -C $sha1 $signoff && + pick_one -n $sha1 && + git commit --allow-empty --allow-empty-message \ + --amend --no-post-rewrite -n -q -C $sha1 $signoff \ + ${gpg_sign_opt:+"$gpg_sign_opt"} || + die_with_patch $sha1 "$(eval_gettext "Could not apply \$sha1... \$rest")" + else + pick_one $sha1 || + die_with_patch $sha1 "$(eval_gettext "Could not apply \$sha1... \$rest")" + fi +} + +do_next () { + rm -f "$msg" "$author_script" "$amend" "$state_dir"/stopped-sha || exit + read -r command sha1 rest < "$todo" + case "$command" in + "$comment_char"*|''|noop|drop|d) + mark_action_done + ;; + "$cr") + # Work around CR left by "read" (e.g. with Git for Windows' Bash). + mark_action_done + ;; + pick|p) + comment_for_reflog pick + + mark_action_done + do_pick $sha1 "$rest" + record_in_rewritten $sha1 + ;; + reword|r) + comment_for_reflog reword + + mark_action_done + do_pick $sha1 "$rest" + git commit --amend --no-post-rewrite ${gpg_sign_opt:+"$gpg_sign_opt"} \ + $allow_empty_message || { + warn "$(eval_gettext "\ +Could not amend commit after successfully picking \$sha1... \$rest +This is most likely due to an empty commit message, or the pre-commit hook +failed. If the pre-commit hook failed, you may need to resolve the issue before +you are able to reword the commit.")" + exit_with_patch $sha1 1 + } + record_in_rewritten $sha1 + ;; + edit|e) + comment_for_reflog edit + + mark_action_done + do_pick $sha1 "$rest" + sha1_abbrev=$(git rev-parse --short $sha1) + warn "$(eval_gettext "Stopped at \$sha1_abbrev... \$rest")" + exit_with_patch $sha1 0 + ;; + squash|s|fixup|f) + case "$command" in + squash|s) + squash_style=squash + ;; + fixup|f) + squash_style=fixup + ;; + esac + comment_for_reflog $squash_style + + test -f "$done" && has_action "$done" || + die "$(eval_gettext "Cannot '\$squash_style' without a previous commit")" + + mark_action_done + update_squash_messages $squash_style $sha1 + author_script_content=$(get_author_ident_from_commit HEAD) + echo "$author_script_content" > "$author_script" + eval "$author_script_content" + if ! pick_one -n $sha1 + then + git rev-parse --verify HEAD >"$amend" + die_failed_squash $sha1 "$rest" + fi + case "$(peek_next_command)" in + squash|s|fixup|f) + # This is an intermediate commit; its message will only be + # used in case of trouble. So use the long version: + do_with_author output git commit --amend --no-verify -F "$squash_msg" \ + ${gpg_sign_opt:+"$gpg_sign_opt"} $allow_empty_message || + die_failed_squash $sha1 "$rest" + ;; + *) + # This is the final command of this squash/fixup group + if test -f "$fixup_msg" + then + do_with_author git commit --amend --no-verify -F "$fixup_msg" \ + ${gpg_sign_opt:+"$gpg_sign_opt"} $allow_empty_message || + die_failed_squash $sha1 "$rest" + else + cp "$squash_msg" "$GIT_DIR"/SQUASH_MSG || exit + rm -f "$GIT_DIR"/MERGE_MSG + do_with_author git commit --amend --no-verify -F "$GIT_DIR"/SQUASH_MSG -e \ + ${gpg_sign_opt:+"$gpg_sign_opt"} $allow_empty_message || + die_failed_squash $sha1 "$rest" + fi + rm -f "$squash_msg" "$fixup_msg" + ;; + esac + record_in_rewritten $sha1 + ;; + x|"exec") + read -r command rest < "$todo" + mark_action_done + eval_gettextln "Executing: \$rest" + "${SHELL:-@SHELL_PATH@}" -c "$rest" # Actual execution + status=$? + # Run in subshell because require_clean_work_tree can die. + dirty=f + (require_clean_work_tree "rebase" 2>/dev/null) || dirty=t + if test "$status" -ne 0 + then + warn "$(eval_gettext "Execution failed: \$rest")" + test "$dirty" = f || + warn "$(gettext "and made changes to the index and/or the working tree")" + + warn "$(gettext "\ +You can fix the problem, and then run + + git rebase --continue")" + warn + if test $status -eq 127 # command not found + then + status=1 + fi + exit "$status" + elif test "$dirty" = t + then + # TRANSLATORS: after these lines is a command to be issued by the user + warn "$(eval_gettext "\ +Execution succeeded: \$rest +but left changes to the index and/or the working tree +Commit or stash your changes, and then run + + git rebase --continue")" + warn + exit 1 + fi + ;; + *) + warn "$(eval_gettext "Unknown command: \$command \$sha1 \$rest")" + fixtodo="$(gettext "Please fix this using 'git rebase --edit-todo'.")" + if git rev-parse --verify -q "$sha1" >/dev/null + then + die_with_patch $sha1 "$fixtodo" + else + die "$fixtodo" + fi + ;; + esac + test -s "$todo" && return + + comment_for_reflog finish && + newhead=$(git rev-parse HEAD) && + case $head_name in + refs/*) + message="$GIT_REFLOG_ACTION: $head_name onto $onto" && + git update-ref -m "$message" $head_name $newhead $orig_head && + git symbolic-ref \ + -m "$GIT_REFLOG_ACTION: returning to $head_name" \ + HEAD $head_name + ;; + esac && { + test ! -f "$state_dir"/verbose || + git diff-tree --stat $orig_head..HEAD + } && + { + test -s "$rewritten_list" && + git notes copy --for-rewrite=rebase < "$rewritten_list" || + true # we don't care if this copying failed + } && + hook="$(git rev-parse --git-path hooks/post-rewrite)" + if test -x "$hook" && test -s "$rewritten_list"; then + "$hook" rebase < "$rewritten_list" + true # we don't care if this hook failed + fi && + warn "$(eval_gettext "Successfully rebased and updated \$head_name.")" + + return 1 # not failure; just to break the do_rest loop +} + +# can only return 0, when the infinite loop breaks +do_rest () { + while : + do + do_next || break + done +} + +expand_todo_ids() { + git rebase--helper --expand-ids +} + +collapse_todo_ids() { + git rebase--helper --shorten-ids +} + +# Switch to the branch in $into and notify it in the reflog +checkout_onto () { + GIT_REFLOG_ACTION="$GIT_REFLOG_ACTION: checkout $onto_name" + output git checkout $onto || die_abort "$(gettext "could not detach HEAD")" + git update-ref ORIG_HEAD $orig_head +} + +get_missing_commit_check_level () { + check_level=$(git config --get rebase.missingCommitsCheck) + check_level=${check_level:-ignore} + # Don't be case sensitive + printf '%s' "$check_level" | tr 'A-Z' 'a-z' +} + +# Initiate an action. If the cannot be any +# further action it may exec a command +# or exit and not return. +# +# TODO: Consider a cleaner return model so it +# never exits and always return 0 if process +# is complete. +# +# Parameter 1 is the action to initiate. +# +# Returns 0 if the action was able to complete +# and if 1 if further processing is required. +initiate_action () { + case "$1" in + continue) + if test ! -d "$rewritten" + then + exec git rebase--helper ${force_rebase:+--no-ff} $allow_empty_message \ + --continue + fi + # do we have anything to commit? + if git diff-index --cached --quiet HEAD -- + then + # Nothing to commit -- skip this commit + + test ! -f "$GIT_DIR"/CHERRY_PICK_HEAD || + rm "$GIT_DIR"/CHERRY_PICK_HEAD || + die "$(gettext "Could not remove CHERRY_PICK_HEAD")" + else + if ! test -f "$author_script" + then + gpg_sign_opt_quoted=${gpg_sign_opt:+$(git rev-parse --sq-quote "$gpg_sign_opt")} + die "$(eval_gettext "\ +You have staged changes in your working tree. +If these changes are meant to be +squashed into the previous commit, run: + + git commit --amend \$gpg_sign_opt_quoted + +If they are meant to go into a new commit, run: + + git commit \$gpg_sign_opt_quoted + +In both cases, once you're done, continue with: + + git rebase --continue +")" + fi + . "$author_script" || + die "$(gettext "Error trying to find the author identity to amend commit")" + if test -f "$amend" + then + current_head=$(git rev-parse --verify HEAD) + test "$current_head" = $(cat "$amend") || + die "$(gettext "\ +You have uncommitted changes in your working tree. Please commit them +first and then run 'git rebase --continue' again.")" + do_with_author git commit --amend --no-verify -F "$msg" -e \ + ${gpg_sign_opt:+"$gpg_sign_opt"} $allow_empty_message || + die "$(gettext "Could not commit staged changes.")" + else + do_with_author git commit --no-verify -F "$msg" -e \ + ${gpg_sign_opt:+"$gpg_sign_opt"} $allow_empty_message || + die "$(gettext "Could not commit staged changes.")" + fi + fi + + if test -r "$state_dir"/stopped-sha + then + record_in_rewritten "$(cat "$state_dir"/stopped-sha)" + fi + + require_clean_work_tree "rebase" + do_rest + return 0 + ;; + skip) + git rerere clear + + if test ! -d "$rewritten" + then + exec git rebase--helper ${force_rebase:+--no-ff} $allow_empty_message \ + --continue + fi + do_rest + return 0 + ;; + edit-todo) + git stripspace --strip-comments <"$todo" >"$todo".new + mv -f "$todo".new "$todo" + collapse_todo_ids + append_todo_help + gettext " +You are editing the todo file of an ongoing interactive rebase. +To continue rebase after editing, run: + git rebase --continue + +" | git stripspace --comment-lines >>"$todo" + + git_sequence_editor "$todo" || + die "$(gettext "Could not execute editor")" + expand_todo_ids + + exit + ;; + show-current-patch) + exec git show REBASE_HEAD -- + ;; + *) + return 1 # continue + ;; + esac +} + +setup_reflog_action () { + comment_for_reflog start + + if test ! -z "$switch_to" + then + GIT_REFLOG_ACTION="$GIT_REFLOG_ACTION: checkout $switch_to" + output git checkout "$switch_to" -- || + die "$(eval_gettext "Could not checkout \$switch_to")" + + comment_for_reflog start + fi +} + +init_basic_state () { + orig_head=$(git rev-parse --verify HEAD) || die "$(gettext "No HEAD?")" + mkdir -p "$state_dir" || die "$(eval_gettext "Could not create temporary \$state_dir")" + rm -f "$(git rev-parse --git-path REBASE_HEAD)" + + : > "$state_dir"/interactive || die "$(gettext "Could not mark as interactive")" + write_basic_state +} + +init_revisions_and_shortrevisions () { + shorthead=$(git rev-parse --short $orig_head) + shortonto=$(git rev-parse --short $onto) + if test -z "$rebase_root" + # this is now equivalent to ! -z "$upstream" + then + shortupstream=$(git rev-parse --short $upstream) + revisions=$upstream...$orig_head + shortrevisions=$shortupstream..$shorthead + else + revisions=$onto...$orig_head + shortrevisions=$shorthead + test -z "$squash_onto" || + echo "$squash_onto" >"$state_dir"/squash-onto + fi +} + +complete_action() { + test -s "$todo" || echo noop >> "$todo" + test -z "$autosquash" || git rebase--helper --rearrange-squash || exit + test -n "$cmd" && git rebase--helper --add-exec-commands "$cmd" + + todocount=$(git stripspace --strip-comments <"$todo" | wc -l) + todocount=${todocount##* } + +cat >>"$todo" <<EOF + +$comment_char $(eval_ngettext \ + "Rebase \$shortrevisions onto \$shortonto (\$todocount command)" \ + "Rebase \$shortrevisions onto \$shortonto (\$todocount commands)" \ + "$todocount") +EOF + append_todo_help + gettext " + However, if you remove everything, the rebase will be aborted. + + " | git stripspace --comment-lines >>"$todo" + + if test -z "$keep_empty" + then + printf '%s\n' "$comment_char $(gettext "Note that empty commits are commented out")" >>"$todo" + fi + + + has_action "$todo" || + return 2 + + cp "$todo" "$todo".backup + collapse_todo_ids + git_sequence_editor "$todo" || + die_abort "$(gettext "Could not execute editor")" + + has_action "$todo" || + return 2 + + git rebase--helper --check-todo-list || { + ret=$? + checkout_onto + exit $ret + } + + expand_todo_ids + + test -d "$rewritten" || test -n "$force_rebase" || + onto="$(git rebase--helper --skip-unnecessary-picks)" || + die "Could not skip unnecessary pick commands" + + checkout_onto + if test ! -d "$rewritten" + then + require_clean_work_tree "rebase" + exec git rebase--helper ${force_rebase:+--no-ff} $allow_empty_message \ + --continue + fi + do_rest +} + +git_rebase__interactive () { + initiate_action "$action" + ret=$? + if test $ret = 0; then + return 0 + fi + + setup_reflog_action + init_basic_state + + init_revisions_and_shortrevisions + + git rebase--helper --make-script ${keep_empty:+--keep-empty} \ + ${rebase_merges:+--rebase-merges} \ + ${rebase_cousins:+--rebase-cousins} \ + $revisions ${restrict_revision+^$restrict_revision} >"$todo" || + die "$(gettext "Could not generate todo list")" + + complete_action +} + +git_rebase__interactive__preserve_merges () { + initiate_action "$action" + ret=$? + if test $ret = 0; then + return 0 + fi + + setup_reflog_action + init_basic_state + + if test -z "$rebase_root" + then + mkdir "$rewritten" && + for c in $(git merge-base --all $orig_head $upstream) + do + echo $onto > "$rewritten"/$c || + die "$(gettext "Could not init rewritten commits")" + done + else + mkdir "$rewritten" && + echo $onto > "$rewritten"/root || + die "$(gettext "Could not init rewritten commits")" + fi + + init_revisions_and_shortrevisions + + format=$(git config --get rebase.instructionFormat) + # the 'rev-list .. | sed' requires %m to parse; the instruction requires %H to parse + git rev-list --format="%m%H ${format:-%s}" \ + --reverse --left-right --topo-order \ + $revisions ${restrict_revision+^$restrict_revision} | \ + sed -n "s/^>//p" | + while read -r sha1 rest + do + if test -z "$keep_empty" && is_empty_commit $sha1 && ! is_merge_commit $sha1 + then + comment_out="$comment_char " + else + comment_out= + fi + + if test -z "$rebase_root" + then + preserve=t + for p in $(git rev-list --parents -1 $sha1 | cut -d' ' -s -f2-) + do + if test -f "$rewritten"/$p + then + preserve=f + fi + done + else + preserve=f + fi + if test f = "$preserve" + then + touch "$rewritten"/$sha1 + printf '%s\n' "${comment_out}pick $sha1 $rest" >>"$todo" + fi + done + + # Watch for commits that been dropped by --cherry-pick + mkdir "$dropped" + # Save all non-cherry-picked changes + git rev-list $revisions --left-right --cherry-pick | \ + sed -n "s/^>//p" > "$state_dir"/not-cherry-picks + # Now all commits and note which ones are missing in + # not-cherry-picks and hence being dropped + git rev-list $revisions | + while read rev + do + if test -f "$rewritten"/$rev && + ! sane_grep "$rev" "$state_dir"/not-cherry-picks >/dev/null + then + # Use -f2 because if rev-list is telling us this commit is + # not worthwhile, we don't want to track its multiple heads, + # just the history of its first-parent for others that will + # be rebasing on top of it + git rev-list --parents -1 $rev | cut -d' ' -s -f2 > "$dropped"/$rev + sha1=$(git rev-list -1 $rev) + sane_grep -v "^[a-z][a-z]* $sha1" <"$todo" > "${todo}2" ; mv "${todo}2" "$todo" + rm "$rewritten"/$rev + fi + done + + complete_action +} |