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300 lines
8.1 KiB
300 lines
8.1 KiB
#!/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] [-s strategy]... [<fetch-options>] <repo> <head>...' |
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LONG_USAGE='Fetch one or more remote refs and merge it/them into 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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set_reflog_action "pull $*" |
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require_work_tree |
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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 "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 "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 [ $(git config --bool --get advice.resolveConflict || echo true) = "true" ]; then |
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die "You have not concluded your merge (MERGE_HEAD exists). |
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Please, commit your changes before you can merge." |
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else |
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die "You have not concluded your merge (MERGE_HEAD exists)." |
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fi |
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} |
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test -z "$(git ls-files -u)" || die_conflict |
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test -f "$GIT_DIR/MERGE_HEAD" && die_merge |
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strategy_args= diffstat= no_commit= squash= no_ff= ff_only= |
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log_arg= verbosity= progress= recurse_submodules= |
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merge_args= |
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curr_branch=$(git symbolic-ref -q HEAD) |
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curr_branch_short="${curr_branch#refs/heads/}" |
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rebase=$(git config --bool branch.$curr_branch_short.rebase) |
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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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-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=$1 ;; |
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--no-c|--no-co|--no-com|--no-comm|--no-commi|--no-commit) |
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no_commit=--no-commit ;; |
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--c|--co|--com|--comm|--commi|--commit) |
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no_commit=--commit ;; |
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--sq|--squ|--squa|--squas|--squash) |
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squash=--squash ;; |
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--no-sq|--no-squ|--no-squa|--no-squas|--no-squash) |
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squash=--no-squash ;; |
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--ff) |
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no_ff=--ff ;; |
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--no-ff) |
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no_ff=--no-ff ;; |
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--ff-only) |
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ff_only=--ff-only ;; |
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-s=*|--s=*|--st=*|--str=*|--stra=*|--strat=*|--strate=*|\ |
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--strateg=*|--strategy=*|\ |
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-s|--s|--st|--str|--stra|--strat|--strate|--strateg|--strategy) |
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case "$#,$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=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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--no-recurse-submodules) |
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recurse_submodules=--no-recurse-submodules |
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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|--h|--he|--hel|--help) |
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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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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" ]; then |
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echo "You are not currently on a branch, so I cannot use any" |
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echo "'branch.<branchname>.merge' in your configuration file." |
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echo "Please specify which remote branch you want to use on the command" |
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echo "line and try again (e.g. 'git pull <repository> <refspec>')." |
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echo "See git-pull(1) for details." |
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elif [ -z "$upstream" ]; then |
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echo "You asked me to pull without telling me which branch you" |
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echo "want to $op_type $op_prep, and 'branch.${curr_branch}.merge' in" |
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echo "your configuration file does not tell me, either. Please" |
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echo "specify which branch you want to use on the command line and" |
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echo "try again (e.g. 'git pull <repository> <refspec>')." |
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echo "See git-pull(1) for details." |
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echo |
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echo "If you often $op_type $op_prep the same branch, you may want to" |
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echo "use something like the following in your configuration file:" |
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echo |
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echo " [branch \"${curr_branch}\"]" |
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echo " remote = <nickname>" |
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echo " merge = <remote-ref>" |
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test rebase = "$op_type" && |
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echo " rebase = true" |
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echo |
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echo " [remote \"<nickname>\"]" |
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echo " url = <url>" |
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echo " fetch = <refspec>" |
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echo |
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echo "See git-config(1) for details." |
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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 "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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. 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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echo >&2 "Warning: fetch updated the current branch head." |
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echo >&2 "Warning: fast-forwarding your working tree from" |
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echo >&2 "Warning: commit $orig_head." |
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git update-index -q --refresh |
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git read-tree -u -m "$orig_head" "$curr_head" || |
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die 'Cannot fast-forward your working tree. |
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After making sure that you saved anything precious from |
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$ 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 "$orig_head" |
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then |
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die "Cannot merge multiple branches into empty head" |
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fi |
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if test true = "$rebase" |
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then |
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die "Cannot rebase onto multiple branches" |
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fi |
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;; |
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esac |
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if test -z "$orig_head" |
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then |
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git update-ref -m "initial pull" HEAD $merge_head "$curr_head" && |
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git read-tree --reset -u HEAD || exit 1 |
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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 $merge_args" |
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eval="$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 $squash $no_ff $ff_only" |
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eval="$eval $log_arg $strategy_args $merge_args" |
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eval="$eval \"\$merge_name\" HEAD $merge_head $verbosity" |
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;; |
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esac |
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eval "exec $eval"
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