diff options
Diffstat (limited to 'git-pull.sh')
| -rwxr-xr-x | git-pull.sh | 185 |
1 files changed, 185 insertions, 0 deletions
diff --git a/git-pull.sh b/git-pull.sh new file mode 100755 index 0000000000..75c36100a2 --- /dev/null +++ b/git-pull.sh @@ -0,0 +1,185 @@ +#!/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 $*" +require_work_tree +cd_to_toplevel + +test -z "$(git ls-files -u)" || + die "You are in the middle of a conflicted merge." + +strategy_args= no_stat= no_commit= squash= no_ff= log_arg= +curr_branch=$(git symbolic-ref -q HEAD) +curr_branch_short=$(echo "$curr_branch" | sed "s|refs/heads/||") +rebase=$(git config --bool branch.$curr_branch_short.rebase) +while : +do + case "$1" in + -n|--no-stat|--no-summary) + no_stat=-n ;; + --stat|--summary) + no_stat=$1 ;; + --log|--no-log) + log_arg=$1 ;; + --no-c|--no-co|--no-com|--no-comm|--no-commi|--no-commit) + no_commit=--no-commit ;; + --c|--co|--com|--comm|--commi|--commit) + no_commit=--commit ;; + --sq|--squ|--squa|--squas|--squash) + squash=--squash ;; + --no-sq|--no-squ|--no-squa|--no-squas|--no-squash) + squash=--no-squash ;; + --ff) + no_ff=--ff ;; + --no-ff) + no_ff=--no-ff ;; + -s=*|--s=*|--st=*|--str=*|--stra=*|--strat=*|--strate=*|\ + --strateg=*|--strategy=*|\ + -s|--s|--st|--str|--stra|--strat|--strate|--strateg|--strategy) + case "$#,$1" in + *,*=*) + strategy=`expr "z$1" : 'z-[^=]*=\(.*\)'` ;; + 1,*) + usage ;; + *) + strategy="$2" + shift ;; + esac + strategy_args="${strategy_args}-s $strategy " + ;; + -r|--r|--re|--reb|--reba|--rebas|--rebase) + rebase=true + ;; + --no-r|--no-re|--no-reb|--no-reba|--no-rebas|--no-rebase) + rebase=false + ;; + -h|--h|--he|--hel|--help) + usage + ;; + *) + # Pass thru anything that may be meant for fetch. + break + ;; + esac + shift +done + +error_on_no_merge_candidates () { + exec >&2 + for opt + do + case "$opt" in + -t|--t|--ta|--tag|--tags) + echo "Fetching tags only, you probably meant:" + echo " git fetch --tags" + exit 1 + esac + done + + curr_branch=${curr_branch#refs/heads/} + + echo "You asked me to pull without telling me which branch you" + echo "want to merge with, and 'branch.${curr_branch}.merge' in" + echo "your configuration file does not tell me either. Please" + echo "name which branch you want to merge on the command line and" + echo "try again (e.g. 'git pull <repository> <refspec>')." + echo "See git-pull(1) for details on the refspec." + echo + echo "If you often merge with the same branch, you may want to" + echo "configure the following variables in your configuration" + echo "file:" + echo + echo " branch.${curr_branch}.remote = <nickname>" + echo " branch.${curr_branch}.merge = <remote-ref>" + echo " remote.<nickname>.url = <url>" + echo " remote.<nickname>.fetch = <refspec>" + echo + echo "See git-config(1) for details." + exit 1 +} + +test true = "$rebase" && { + 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" + + . git-parse-remote && + origin="$1" + test -z "$origin" && origin=$(get_default_remote) + reflist="$(get_remote_refs_for_fetch "$@" 2>/dev/null | + sed "s|refs/heads/\(.*\):|\1|")" && + oldremoteref="$(git rev-parse --verify \ + "refs/remotes/$origin/$reflist" 2>/dev/null)" +} +orig_head=$(git rev-parse --verify HEAD 2>/dev/null) +git fetch --update-head-ok "$@" || exit 1 + +curr_head=$(git rev-parse --verify HEAD 2>/dev/null) +if 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 $orig_head." + git update-index --refresh 2>/dev/null + git read-tree -u -m "$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 +'') + case $? in + 0) error_on_no_merge_candidates "$@";; + 1) echo >&2 "You are not currently on a branch; you must explicitly" + echo >&2 "specify which branch you wish to merge:" + echo >&2 " git pull <remote> <branch>" + exit 1;; + *) exit $?;; + esac + ;; +?*' '?*) + if test -z "$orig_head" + then + echo >&2 "Cannot merge multiple branches into empty head" + exit 1 + fi + ;; +esac + +if test -z "$orig_head" +then + git update-ref -m "initial pull" HEAD $merge_head "" && + git read-tree --reset -u HEAD || exit 1 + exit +fi + +merge_name=$(git fmt-merge-msg $log_arg <"$GIT_DIR/FETCH_HEAD") || exit +test true = "$rebase" && + exec git-rebase $strategy_args --onto $merge_head \ + ${oldremoteref:-$merge_head} +exec git-merge $no_stat $no_commit $squash $no_ff $log_arg $strategy_args \ + "$merge_name" HEAD $merge_head |