You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
294 lines
8.0 KiB
294 lines
8.0 KiB
#!/bin/sh |
|
# |
|
# Copyright (c) 2005 Junio C Hamano |
|
# |
|
# Fetch one or more remote refs and merge it/them into the current HEAD. |
|
|
|
USAGE='[-n | --no-stat] [--[no-]commit] [--[no-]squash] [--[no-]ff] [-s strategy]... [<fetch-options>] <repo> <head>...' |
|
LONG_USAGE='Fetch one or more remote refs and merge it/them into the current HEAD.' |
|
SUBDIRECTORY_OK=Yes |
|
OPTIONS_SPEC= |
|
. git-sh-setup |
|
set_reflog_action "pull $*" |
|
require_work_tree |
|
cd_to_toplevel |
|
|
|
|
|
die_conflict () { |
|
git diff-index --cached --name-status -r --ignore-submodules HEAD -- |
|
if [ $(git config --bool --get advice.resolveConflict || echo true) = "true" ]; then |
|
die "Pull is not possible because you have unmerged files. |
|
Please, fix them up in the work tree, and then use 'git add/rm <file>' |
|
as appropriate to mark resolution, or use 'git commit -a'." |
|
else |
|
die "Pull is not possible because you have unmerged files." |
|
fi |
|
} |
|
|
|
die_merge () { |
|
if [ $(git config --bool --get advice.resolveConflict || echo true) = "true" ]; then |
|
die "You have not concluded your merge (MERGE_HEAD exists). |
|
Please, commit your changes before you can merge." |
|
else |
|
die "You have not concluded your merge (MERGE_HEAD exists)." |
|
fi |
|
} |
|
|
|
test -z "$(git ls-files -u)" || die_conflict |
|
test -f "$GIT_DIR/MERGE_HEAD" && die_merge |
|
|
|
strategy_args= diffstat= no_commit= squash= no_ff= ff_only= |
|
log_arg= verbosity= progress= |
|
merge_args= |
|
curr_branch=$(git symbolic-ref -q HEAD) |
|
curr_branch_short="${curr_branch#refs/heads/}" |
|
rebase=$(git config --bool branch.$curr_branch_short.rebase) |
|
dry_run= |
|
while : |
|
do |
|
case "$1" in |
|
-q|--quiet) |
|
verbosity="$verbosity -q" ;; |
|
-v|--verbose) |
|
verbosity="$verbosity -v" ;; |
|
--progress) |
|
progress=--progress ;; |
|
-n|--no-stat|--no-summary) |
|
diffstat=--no-stat ;; |
|
--stat|--summary) |
|
diffstat=--stat ;; |
|
--log|--no-log) |
|
log_arg=$1 ;; |
|
--no-c|--no-co|--no-com|--no-comm|--no-commi|--no-commit) |
|
no_commit=--no-commit ;; |
|
--c|--co|--com|--comm|--commi|--commit) |
|
no_commit=--commit ;; |
|
--sq|--squ|--squa|--squas|--squash) |
|
squash=--squash ;; |
|
--no-sq|--no-squ|--no-squa|--no-squas|--no-squash) |
|
squash=--no-squash ;; |
|
--ff) |
|
no_ff=--ff ;; |
|
--no-ff) |
|
no_ff=--no-ff ;; |
|
--ff-only) |
|
ff_only=--ff-only ;; |
|
-s=*|--s=*|--st=*|--str=*|--stra=*|--strat=*|--strate=*|\ |
|
--strateg=*|--strategy=*|\ |
|
-s|--s|--st|--str|--stra|--strat|--strate|--strateg|--strategy) |
|
case "$#,$1" in |
|
*,*=*) |
|
strategy=`expr "z$1" : 'z-[^=]*=\(.*\)'` ;; |
|
1,*) |
|
usage ;; |
|
*) |
|
strategy="$2" |
|
shift ;; |
|
esac |
|
strategy_args="${strategy_args}-s $strategy " |
|
;; |
|
-X*) |
|
case "$#,$1" in |
|
1,-X) |
|
usage ;; |
|
*,-X) |
|
xx="-X $(git rev-parse --sq-quote "$2")" |
|
shift ;; |
|
*,*) |
|
xx=$(git rev-parse --sq-quote "$1") ;; |
|
esac |
|
merge_args="$merge_args$xx " |
|
;; |
|
-r|--r|--re|--reb|--reba|--rebas|--rebase) |
|
rebase=true |
|
;; |
|
--no-r|--no-re|--no-reb|--no-reba|--no-rebas|--no-rebase) |
|
rebase=false |
|
;; |
|
--d|--dr|--dry|--dry-|--dry-r|--dry-ru|--dry-run) |
|
dry_run=--dry-run |
|
;; |
|
-h|--h|--he|--hel|--help) |
|
usage |
|
;; |
|
*) |
|
# Pass thru anything that may be meant for fetch. |
|
break |
|
;; |
|
esac |
|
shift |
|
done |
|
|
|
error_on_no_merge_candidates () { |
|
exec >&2 |
|
for opt |
|
do |
|
case "$opt" in |
|
-t|--t|--ta|--tag|--tags) |
|
echo "Fetching tags only, you probably meant:" |
|
echo " git fetch --tags" |
|
exit 1 |
|
esac |
|
done |
|
|
|
if test true = "$rebase" |
|
then |
|
op_type=rebase |
|
op_prep=against |
|
else |
|
op_type=merge |
|
op_prep=with |
|
fi |
|
|
|
curr_branch=${curr_branch#refs/heads/} |
|
upstream=$(git config "branch.$curr_branch.merge") |
|
remote=$(git config "branch.$curr_branch.remote") |
|
|
|
if [ $# -gt 1 ]; then |
|
if [ "$rebase" = true ]; then |
|
printf "There is no candidate for rebasing against " |
|
else |
|
printf "There are no candidates for merging " |
|
fi |
|
echo "among the refs that you just fetched." |
|
echo "Generally this means that you provided a wildcard refspec which had no" |
|
echo "matches on the remote end." |
|
elif [ $# -gt 0 ] && [ "$1" != "$remote" ]; then |
|
echo "You asked to pull from the remote '$1', but did not specify" |
|
echo "a branch. Because this is not the default configured remote" |
|
echo "for your current branch, you must specify a branch on the command line." |
|
elif [ -z "$curr_branch" ]; then |
|
echo "You are not currently on a branch, so I cannot use any" |
|
echo "'branch.<branchname>.merge' in your configuration file." |
|
echo "Please specify which remote branch you want to use on the command" |
|
echo "line and try again (e.g. 'git pull <repository> <refspec>')." |
|
echo "See git-pull(1) for details." |
|
elif [ -z "$upstream" ]; then |
|
echo "You asked me to pull without telling me which branch you" |
|
echo "want to $op_type $op_prep, and 'branch.${curr_branch}.merge' in" |
|
echo "your configuration file does not tell me, either. Please" |
|
echo "specify which branch you want to use on the command line and" |
|
echo "try again (e.g. 'git pull <repository> <refspec>')." |
|
echo "See git-pull(1) for details." |
|
echo |
|
echo "If you often $op_type $op_prep the same branch, you may want to" |
|
echo "use something like the following in your configuration file:" |
|
echo |
|
echo " [branch \"${curr_branch}\"]" |
|
echo " remote = <nickname>" |
|
echo " merge = <remote-ref>" |
|
test rebase = "$op_type" && |
|
echo " rebase = true" |
|
echo |
|
echo " [remote \"<nickname>\"]" |
|
echo " url = <url>" |
|
echo " fetch = <refspec>" |
|
echo |
|
echo "See git-config(1) for details." |
|
else |
|
echo "Your configuration specifies to $op_type $op_prep the ref '${upstream#refs/heads/}'" |
|
echo "from the remote, but no such ref was fetched." |
|
fi |
|
exit 1 |
|
} |
|
|
|
test true = "$rebase" && { |
|
if ! git rev-parse -q --verify HEAD >/dev/null |
|
then |
|
# On an unborn branch |
|
if test -f "$GIT_DIR/index" |
|
then |
|
die "updating an unborn branch with changes added to the index" |
|
fi |
|
else |
|
require_clean_work_tree "pull with rebase" "Please commit or stash them." |
|
fi |
|
oldremoteref= && |
|
. git-parse-remote && |
|
remoteref="$(get_remote_merge_branch "$@" 2>/dev/null)" && |
|
oldremoteref="$(git rev-parse -q --verify "$remoteref")" && |
|
for reflog in $(git rev-list -g $remoteref 2>/dev/null) |
|
do |
|
if test "$reflog" = "$(git merge-base $reflog $curr_branch)" |
|
then |
|
oldremoteref="$reflog" |
|
break |
|
fi |
|
done |
|
} |
|
orig_head=$(git rev-parse -q --verify HEAD) |
|
git fetch $verbosity $progress $dry_run --update-head-ok "$@" || exit 1 |
|
test -z "$dry_run" || exit 0 |
|
|
|
curr_head=$(git rev-parse -q --verify HEAD) |
|
if test -n "$orig_head" && test "$curr_head" != "$orig_head" |
|
then |
|
# The fetch involved updating the current branch. |
|
|
|
# The working tree and the index file is still based on the |
|
# $orig_head commit, but we are merging into $curr_head. |
|
# First update the working tree to match $curr_head. |
|
|
|
echo >&2 "Warning: fetch updated the current branch head." |
|
echo >&2 "Warning: fast-forwarding your working tree from" |
|
echo >&2 "Warning: commit $orig_head." |
|
git update-index -q --refresh |
|
git read-tree -u -m "$orig_head" "$curr_head" || |
|
die 'Cannot fast-forward your working tree. |
|
After making sure that you saved anything precious from |
|
$ git diff '$orig_head' |
|
output, run |
|
$ git reset --hard |
|
to recover.' |
|
|
|
fi |
|
|
|
merge_head=$(sed -e '/ not-for-merge /d' \ |
|
-e 's/ .*//' "$GIT_DIR"/FETCH_HEAD | \ |
|
tr '\012' ' ') |
|
|
|
case "$merge_head" in |
|
'') |
|
error_on_no_merge_candidates "$@" |
|
;; |
|
?*' '?*) |
|
if test -z "$orig_head" |
|
then |
|
die "Cannot merge multiple branches into empty head" |
|
fi |
|
if test true = "$rebase" |
|
then |
|
die "Cannot rebase onto multiple branches" |
|
fi |
|
;; |
|
esac |
|
|
|
if test -z "$orig_head" |
|
then |
|
git update-ref -m "initial pull" HEAD $merge_head "$curr_head" && |
|
git read-tree --reset -u HEAD || exit 1 |
|
exit |
|
fi |
|
|
|
if test true = "$rebase" |
|
then |
|
o=$(git show-branch --merge-base $curr_branch $merge_head $oldremoteref) |
|
if test "$oldremoteref" = "$o" |
|
then |
|
unset oldremoteref |
|
fi |
|
fi |
|
|
|
merge_name=$(git fmt-merge-msg $log_arg <"$GIT_DIR/FETCH_HEAD") || exit |
|
case "$rebase" in |
|
true) |
|
eval="git-rebase $diffstat $strategy_args $merge_args" |
|
eval="$eval --onto $merge_head ${oldremoteref:-$merge_head}" |
|
;; |
|
*) |
|
eval="git-merge $diffstat $no_commit $squash $no_ff $ff_only" |
|
eval="$eval $log_arg $strategy_args $merge_args" |
|
eval="$eval \"\$merge_name\" HEAD $merge_head $verbosity" |
|
;; |
|
esac |
|
eval "exec $eval"
|
|
|