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If a user is working on master, and has merged in their feature branch, but now has to "git pull" because master moved, with pull.rebase their feature branch will be flattened into master. This is because "git pull" currently does not know about rebase's preserve merges flag, which would avoid this behavior, as it would instead replay just the merge commit of the feature branch onto the new master, and not replay each individual commit in the feature branch. Add a --rebase=preserve option, which will pass along --preserve-merges to rebase. Also add 'preserve' to the allowed values for the pull.rebase config setting. Signed-off-by: Stephen Haberman <stephen@exigencecorp.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
326 lines
8.5 KiB
Bash
Executable file
326 lines
8.5 KiB
Bash
Executable file
#!/bin/sh
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#
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# Copyright (c) 2005 Junio C Hamano
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#
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# Fetch one or more remote refs and merge it/them into the current HEAD.
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USAGE='[-n | --no-stat] [--[no-]commit] [--[no-]squash] [--[no-]ff] [--[no-]rebase|--rebase=preserve] [-s strategy]... [<fetch-options>] <repo> <head>...'
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LONG_USAGE='Fetch one or more remote refs and integrate it/them with the current HEAD.'
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SUBDIRECTORY_OK=Yes
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OPTIONS_SPEC=
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. git-sh-setup
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. git-sh-i18n
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set_reflog_action "pull${1+ $*}"
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require_work_tree_exists
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cd_to_toplevel
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die_conflict () {
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git diff-index --cached --name-status -r --ignore-submodules HEAD --
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if [ $(git config --bool --get advice.resolveConflict || echo true) = "true" ]; then
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die "$(gettext "Pull is not possible because you have unmerged files.
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Please, fix them up in the work tree, and then use 'git add/rm <file>'
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as appropriate to mark resolution, or use 'git commit -a'.")"
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else
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die "$(gettext "Pull is not possible because you have unmerged files.")"
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fi
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}
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die_merge () {
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if [ $(git config --bool --get advice.resolveConflict || echo true) = "true" ]; then
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die "$(gettext "You have not concluded your merge (MERGE_HEAD exists).
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Please, commit your changes before you can merge.")"
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else
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die "$(gettext "You have not concluded your merge (MERGE_HEAD exists).")"
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fi
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}
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test -z "$(git ls-files -u)" || die_conflict
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test -f "$GIT_DIR/MERGE_HEAD" && die_merge
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bool_or_string_config () {
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git config --bool "$1" 2>/dev/null || git config "$1"
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}
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strategy_args= diffstat= no_commit= squash= no_ff= ff_only=
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log_arg= verbosity= progress= recurse_submodules= verify_signatures=
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merge_args= edit= rebase_args=
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curr_branch=$(git symbolic-ref -q HEAD)
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curr_branch_short="${curr_branch#refs/heads/}"
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rebase=$(bool_or_string_config branch.$curr_branch_short.rebase)
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if test -z "$rebase"
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then
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rebase=$(bool_or_string_config pull.rebase)
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fi
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dry_run=
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while :
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do
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case "$1" in
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-q|--quiet)
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verbosity="$verbosity -q" ;;
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-v|--verbose)
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verbosity="$verbosity -v" ;;
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--progress)
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progress=--progress ;;
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--no-progress)
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progress=--no-progress ;;
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-n|--no-stat|--no-summary)
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diffstat=--no-stat ;;
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--stat|--summary)
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diffstat=--stat ;;
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--log|--no-log)
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log_arg=$1 ;;
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--no-c|--no-co|--no-com|--no-comm|--no-commi|--no-commit)
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no_commit=--no-commit ;;
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--c|--co|--com|--comm|--commi|--commit)
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no_commit=--commit ;;
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-e|--edit)
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edit=--edit ;;
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--no-edit)
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edit=--no-edit ;;
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--sq|--squ|--squa|--squas|--squash)
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squash=--squash ;;
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--no-sq|--no-squ|--no-squa|--no-squas|--no-squash)
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squash=--no-squash ;;
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--ff)
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no_ff=--ff ;;
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--no-ff)
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no_ff=--no-ff ;;
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--ff-only)
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ff_only=--ff-only ;;
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-s=*|--s=*|--st=*|--str=*|--stra=*|--strat=*|--strate=*|\
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--strateg=*|--strategy=*|\
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-s|--s|--st|--str|--stra|--strat|--strate|--strateg|--strategy)
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case "$#,$1" in
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*,*=*)
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strategy=`expr "z$1" : 'z-[^=]*=\(.*\)'` ;;
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1,*)
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usage ;;
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*)
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strategy="$2"
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shift ;;
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esac
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strategy_args="${strategy_args}-s $strategy "
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;;
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-X*)
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case "$#,$1" in
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1,-X)
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usage ;;
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*,-X)
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xx="-X $(git rev-parse --sq-quote "$2")"
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shift ;;
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*,*)
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xx=$(git rev-parse --sq-quote "$1") ;;
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esac
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merge_args="$merge_args$xx "
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;;
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-r=*|--r=*|--re=*|--reb=*|--reba=*|--rebas=*|--rebase=*)
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rebase="${1#*=}"
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;;
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-r|--r|--re|--reb|--reba|--rebas|--rebase)
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rebase=true
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;;
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--no-r|--no-re|--no-reb|--no-reba|--no-rebas|--no-rebase)
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rebase=false
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;;
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--recurse-submodules)
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recurse_submodules=--recurse-submodules
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;;
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--recurse-submodules=*)
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recurse_submodules="$1"
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;;
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--no-recurse-submodules)
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recurse_submodules=--no-recurse-submodules
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;;
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--verify-signatures)
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verify_signatures=--verify-signatures
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;;
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--no-verify-signatures)
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verify_signatures=--no-verify-signatures
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;;
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--d|--dr|--dry|--dry-|--dry-r|--dry-ru|--dry-run)
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dry_run=--dry-run
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;;
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-h|--help-all)
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usage
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;;
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*)
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# Pass thru anything that may be meant for fetch.
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break
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;;
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esac
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shift
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done
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case "$rebase" in
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preserve)
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rebase=true
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rebase_args=--preserve-merges
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;;
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true|false|'')
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;;
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*)
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echo "Invalid value for --rebase, should be true, false, or preserve"
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usage
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exit 1
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;;
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esac
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error_on_no_merge_candidates () {
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exec >&2
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for opt
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do
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case "$opt" in
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-t|--t|--ta|--tag|--tags)
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echo "Fetching tags only, you probably meant:"
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echo " git fetch --tags"
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exit 1
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esac
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done
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if test true = "$rebase"
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then
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op_type=rebase
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op_prep=against
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else
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op_type=merge
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op_prep=with
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fi
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curr_branch=${curr_branch#refs/heads/}
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upstream=$(git config "branch.$curr_branch.merge")
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remote=$(git config "branch.$curr_branch.remote")
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if [ $# -gt 1 ]; then
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if [ "$rebase" = true ]; then
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printf "There is no candidate for rebasing against "
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else
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printf "There are no candidates for merging "
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fi
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echo "among the refs that you just fetched."
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echo "Generally this means that you provided a wildcard refspec which had no"
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echo "matches on the remote end."
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elif [ $# -gt 0 ] && [ "$1" != "$remote" ]; then
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echo "You asked to pull from the remote '$1', but did not specify"
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echo "a branch. Because this is not the default configured remote"
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echo "for your current branch, you must specify a branch on the command line."
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elif [ -z "$curr_branch" -o -z "$upstream" ]; then
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. git-parse-remote
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error_on_missing_default_upstream "pull" $op_type $op_prep \
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"git pull <remote> <branch>"
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else
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echo "Your configuration specifies to $op_type $op_prep the ref '${upstream#refs/heads/}'"
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echo "from the remote, but no such ref was fetched."
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fi
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exit 1
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}
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test true = "$rebase" && {
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if ! git rev-parse -q --verify HEAD >/dev/null
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then
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# On an unborn branch
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if test -f "$GIT_DIR/index"
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then
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die "$(gettext "updating an unborn branch with changes added to the index")"
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fi
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else
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require_clean_work_tree "pull with rebase" "Please commit or stash them."
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fi
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oldremoteref= &&
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test -n "$curr_branch" &&
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. git-parse-remote &&
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remoteref="$(get_remote_merge_branch "$@" 2>/dev/null)" &&
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oldremoteref="$(git rev-parse -q --verify "$remoteref")" &&
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for reflog in $(git rev-list -g $remoteref 2>/dev/null)
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do
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if test "$reflog" = "$(git merge-base $reflog $curr_branch)"
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then
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oldremoteref="$reflog"
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break
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fi
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done
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}
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orig_head=$(git rev-parse -q --verify HEAD)
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git fetch $verbosity $progress $dry_run $recurse_submodules --update-head-ok "$@" || exit 1
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test -z "$dry_run" || exit 0
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curr_head=$(git rev-parse -q --verify HEAD)
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if test -n "$orig_head" && test "$curr_head" != "$orig_head"
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then
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# The fetch involved updating the current branch.
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# The working tree and the index file is still based on the
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# $orig_head commit, but we are merging into $curr_head.
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# First update the working tree to match $curr_head.
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eval_gettextln "Warning: fetch updated the current branch head.
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Warning: fast-forwarding your working tree from
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Warning: commit \$orig_head." >&2
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git update-index -q --refresh
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git read-tree -u -m "$orig_head" "$curr_head" ||
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die "$(eval_gettext "Cannot fast-forward your working tree.
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After making sure that you saved anything precious from
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$ git diff \$orig_head
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output, run
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$ git reset --hard
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to recover.")"
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fi
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merge_head=$(sed -e '/ not-for-merge /d' \
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-e 's/ .*//' "$GIT_DIR"/FETCH_HEAD | \
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tr '\012' ' ')
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case "$merge_head" in
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'')
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error_on_no_merge_candidates "$@"
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;;
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?*' '?*)
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if test -z "$orig_head"
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then
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die "$(gettext "Cannot merge multiple branches into empty head")"
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fi
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if test true = "$rebase"
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then
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die "$(gettext "Cannot rebase onto multiple branches")"
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fi
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;;
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esac
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# Pulling into unborn branch: a shorthand for branching off
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# FETCH_HEAD, for lazy typers.
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if test -z "$orig_head"
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then
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# Two-way merge: we claim the index is based on an empty tree,
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# and try to fast-forward to HEAD. This ensures we will not
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# lose index/worktree changes that the user already made on
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# the unborn branch.
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empty_tree=4b825dc642cb6eb9a060e54bf8d69288fbee4904
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git read-tree -m -u $empty_tree $merge_head &&
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git update-ref -m "initial pull" HEAD $merge_head "$curr_head"
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exit
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fi
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if test true = "$rebase"
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then
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o=$(git show-branch --merge-base $curr_branch $merge_head $oldremoteref)
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if test "$oldremoteref" = "$o"
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then
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unset oldremoteref
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fi
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fi
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merge_name=$(git fmt-merge-msg $log_arg <"$GIT_DIR/FETCH_HEAD") || exit
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case "$rebase" in
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true)
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eval="git-rebase $diffstat $strategy_args $merge_args $rebase_args $verbosity"
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eval="$eval --onto $merge_head ${oldremoteref:-$merge_head}"
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;;
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*)
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eval="git-merge $diffstat $no_commit $verify_signatures $edit $squash $no_ff $ff_only"
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eval="$eval $log_arg $strategy_args $merge_args $verbosity $progress"
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eval="$eval \"\$merge_name\" HEAD $merge_head"
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;;
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esac
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eval "exec $eval"
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