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202 lines
5.6 KiB
202 lines
5.6 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 $*" |
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require_work_tree |
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cd_to_toplevel |
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test -z "$(git ls-files -u)" || |
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die "You are in the middle of a conflicted merge." |
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strategy_args= diffstat= no_commit= squash= no_ff= log_arg= verbosity= |
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curr_branch=$(git symbolic-ref -q HEAD) |
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curr_branch_short=$(echo "$curr_branch" | sed "s|refs/heads/||") |
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rebase=$(git config --bool branch.$curr_branch_short.rebase) |
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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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-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=$1 ;; |
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--no-c|--no-co|--no-com|--no-comm|--no-commi|--no-commit) |
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no_commit=--no-commit ;; |
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--c|--co|--com|--comm|--commi|--commit) |
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no_commit=--commit ;; |
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--sq|--squ|--squa|--squas|--squash) |
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squash=--squash ;; |
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--no-sq|--no-squ|--no-squa|--no-squas|--no-squash) |
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squash=--no-squash ;; |
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--ff) |
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no_ff=--ff ;; |
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--no-ff) |
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no_ff=--no-ff ;; |
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-s=*|--s=*|--st=*|--str=*|--stra=*|--strat=*|--strate=*|\ |
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--strateg=*|--strategy=*|\ |
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-s|--s|--st|--str|--stra|--strat|--strate|--strateg|--strategy) |
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case "$#,$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 $strategy " |
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;; |
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-r|--r|--re|--reb|--reba|--rebas|--rebase) |
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rebase=true |
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;; |
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--no-r|--no-re|--no-reb|--no-reba|--no-rebas|--no-rebase) |
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rebase=false |
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;; |
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-h|--h|--he|--hel|--help) |
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usage |
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;; |
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*) |
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# Pass thru anything that may be meant for fetch. |
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break |
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;; |
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esac |
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shift |
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done |
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error_on_no_merge_candidates () { |
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exec >&2 |
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for opt |
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do |
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case "$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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curr_branch=${curr_branch#refs/heads/} |
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if [ -z "$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 branch you want to merge 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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else |
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echo "You asked me to pull without telling me which branch you" |
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echo "want to merge with, and 'branch.${curr_branch}.merge' in" |
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echo "your configuration file does not tell me either. Please" |
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echo "specify which branch you want to merge on the command line and" |
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echo "try again (e.g. 'git pull <repository> <refspec>')." |
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echo "See git-pull(1) for details." |
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echo |
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echo "If you often merge with the same branch, you may want to" |
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echo "configure the following variables in your configuration" |
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echo "file:" |
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echo |
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echo " branch.${curr_branch}.remote = <nickname>" |
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echo " branch.${curr_branch}.merge = <remote-ref>" |
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echo " remote.<nickname>.url = <url>" |
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echo " remote.<nickname>.fetch = <refspec>" |
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echo |
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echo "See git-config(1) for details." |
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fi |
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exit 1 |
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} |
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test true = "$rebase" && { |
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git update-index --ignore-submodules --refresh && |
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git diff-files --ignore-submodules --quiet && |
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git diff-index --ignore-submodules --cached --quiet HEAD -- || |
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die "refusing to pull with rebase: your working tree is not up-to-date" |
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. git-parse-remote && |
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origin="$1" |
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test -z "$origin" && origin=$(get_default_remote) |
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reflist="$(get_remote_refs_for_fetch "$@" 2>/dev/null | |
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sed "s|refs/heads/\(.*\):|\1|")" && |
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oldremoteref="$(git rev-parse -q --verify \ |
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"refs/remotes/$origin/$reflist")" |
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} |
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orig_head=$(git rev-parse -q --verify HEAD) |
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git fetch $verbosity --update-head-ok "$@" || exit 1 |
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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 $orig_head." |
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git update-index --refresh 2>/dev/null |
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git read-tree -u -m "$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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case $? in |
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0) error_on_no_merge_candidates "$@";; |
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1) echo >&2 "You are not currently on a branch; you must explicitly" |
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echo >&2 "specify which branch you wish to merge:" |
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echo >&2 " git pull <remote> <branch>" |
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exit 1;; |
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*) exit $?;; |
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esac |
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;; |
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?*' '?*) |
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if test -z "$orig_head" |
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then |
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echo >&2 "Cannot merge multiple branches into empty head" |
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exit 1 |
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fi |
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if test true = "$rebase" |
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then |
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echo >&2 "Cannot rebase onto multiple branches" |
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exit 1 |
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fi |
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;; |
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esac |
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if test -z "$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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merge_name=$(git fmt-merge-msg $log_arg <"$GIT_DIR/FETCH_HEAD") || exit |
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test true = "$rebase" && |
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exec git-rebase $diffstat $strategy_args --onto $merge_head \ |
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${oldremoteref:-$merge_head} |
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exec git-merge $diffstat $no_commit $squash $no_ff $log_arg $strategy_args \ |
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"$merge_name" HEAD $merge_head $verbosity
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