mirror of
https://github.com/git/git
synced 2024-11-05 18:59:29 +00:00
29609e6822
Pull was never meant to take --dry-run at all. However, it
passes unknown arguments to git-fetch, which does do a
dry-run. Unfortunately, pull then attempts to merge whatever
cruft was in FETCH_HEAD (which the dry-run fetch will not
have written to).
Even though we never advertise --dry-run as something that
should work, it is still worth being defensive because:
1. Other commands (including fetch) take --dry-run, so a
user might try it.
2. Rather than simply producing an error, it actually
changes the repository in totally unexpected ways.
This patch makes "pull --dry-run" equivalent to "fetch
--dry-run".
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
288 lines
8 KiB
Bash
Executable file
288 lines
8 KiB
Bash
Executable file
#!/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
|
|
git update-index --ignore-submodules --refresh &&
|
|
git diff-files --ignore-submodules --quiet &&
|
|
git diff-index --ignore-submodules --cached --quiet HEAD -- ||
|
|
die "refusing to pull with rebase: your working tree is not up-to-date"
|
|
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
|
|
|
|
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"
|