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Diffstat (limited to 'git-pull.sh')
| -rwxr-xr-x | git-pull.sh | 324 |
1 files changed, 324 insertions, 0 deletions
diff --git a/git-pull.sh b/git-pull.sh new file mode 100755 index 0000000..b946fd9 --- /dev/null +++ b/git-pull.sh @@ -0,0 +1,324 @@ +#!/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] [--[no-]rebase|--rebase=preserve] [-s strategy]... [<fetch-options>] <repo> <head>...' +LONG_USAGE='Fetch one or more remote refs and integrate it/them with the current HEAD.' +SUBDIRECTORY_OK=Yes +OPTIONS_SPEC= +. git-sh-setup +. git-sh-i18n +set_reflog_action "pull${1+ $*}" +require_work_tree_exists +cd_to_toplevel + + +die_conflict () { + git diff-index --cached --name-status -r --ignore-submodules HEAD -- + if [ $(git config --bool --get advice.resolveConflict || echo true) = "true" ]; then + die "$(gettext "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 "$(gettext "Pull is not possible because you have unmerged files.")" + fi +} + +die_merge () { + if [ $(git config --bool --get advice.resolveConflict || echo true) = "true" ]; then + die "$(gettext "You have not concluded your merge (MERGE_HEAD exists). +Please, commit your changes before you can merge.")" + else + die "$(gettext "You have not concluded your merge (MERGE_HEAD exists).")" + fi +} + +test -z "$(git ls-files -u)" || die_conflict +test -f "$GIT_DIR/MERGE_HEAD" && die_merge + +bool_or_string_config () { + git config --bool "$1" 2>/dev/null || git config "$1" +} + +strategy_args= diffstat= no_commit= squash= no_ff= ff_only= +log_arg= verbosity= progress= recurse_submodules= verify_signatures= +merge_args= edit= rebase_args= +curr_branch=$(git symbolic-ref -q HEAD) +curr_branch_short="${curr_branch#refs/heads/}" +rebase=$(bool_or_string_config branch.$curr_branch_short.rebase) +if test -z "$rebase" +then + rebase=$(bool_or_string_config pull.rebase) +fi +dry_run= +while : +do + case "$1" in + -q|--quiet) + verbosity="$verbosity -q" ;; + -v|--verbose) + verbosity="$verbosity -v" ;; + --progress) + progress=--progress ;; + --no-progress) + progress=--no-progress ;; + -n|--no-stat|--no-summary) + diffstat=--no-stat ;; + --stat|--summary) + diffstat=--stat ;; + --log|--no-log) + log_arg=$1 ;; + --no-c|--no-co|--no-com|--no-comm|--no-commi|--no-commit) + no_commit=--no-commit ;; + --c|--co|--com|--comm|--commi|--commit) + no_commit=--commit ;; + -e|--edit) + edit=--edit ;; + --no-edit) + edit=--no-edit ;; + --sq|--squ|--squa|--squas|--squash) + squash=--squash ;; + --no-sq|--no-squ|--no-squa|--no-squas|--no-squash) + squash=--no-squash ;; + --ff) + no_ff=--ff ;; + --no-ff) + no_ff=--no-ff ;; + --ff-only) + ff_only=--ff-only ;; + -s=*|--s=*|--st=*|--str=*|--stra=*|--strat=*|--strate=*|\ + --strateg=*|--strategy=*|\ + -s|--s|--st|--str|--stra|--strat|--strate|--strateg|--strategy) + case "$#,$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$xx " + ;; + -r=*|--r=*|--re=*|--reb=*|--reba=*|--rebas=*|--rebase=*) + rebase="${1#*=}" + ;; + -r|--r|--re|--reb|--reba|--rebas|--rebase) + rebase=true + ;; + --no-r|--no-re|--no-reb|--no-reba|--no-rebas|--no-rebase) + rebase=false + ;; + --recurse-submodules) + recurse_submodules=--recurse-submodules + ;; + --recurse-submodules=*) + recurse_submodules="$1" + ;; + --no-recurse-submodules) + recurse_submodules=--no-recurse-submodules + ;; + --verify-signatures) + verify_signatures=--verify-signatures + ;; + --no-verify-signatures) + verify_signatures=--no-verify-signatures + ;; + --d|--dr|--dry|--dry-|--dry-r|--dry-ru|--dry-run) + dry_run=--dry-run + ;; + -h|--help-all) + usage + ;; + *) + # Pass thru anything that may be meant for fetch. + break + ;; + esac + shift +done + +case "$rebase" in +preserve) + rebase=true + rebase_args=--preserve-merges + ;; +true|false|'') + ;; +*) + echo "Invalid value for --rebase, should be true, false, or preserve" + usage + exit 1 + ;; +esac + +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 + + upstream=$(git config "branch.$curr_branch_short.merge") + remote=$(git config "branch.$curr_branch_short.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" -o -z "$upstream" ]; then + . git-parse-remote + error_on_missing_default_upstream "pull" $op_type $op_prep \ + "git pull <remote> <branch>" + 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 "$(gettext "updating an unborn branch with changes added to the index")" + fi + else + require_clean_work_tree "pull with rebase" "Please commit or stash them." + fi + oldremoteref= && + test -n "$curr_branch" && + . 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 $recurse_submodules --update-head-ok "$@" || 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 $curr_head. + + eval_gettextln "Warning: fetch updated the current branch head. +Warning: fast-forwarding your working tree from +Warning: commit \$orig_head." >&2 + git update-index -q --refresh + git read-tree -u -m "$orig_head" "$curr_head" || + die "$(eval_gettext "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 "$orig_head" + then + die "$(gettext "Cannot merge multiple branches into empty head")" + fi + if test true = "$rebase" + then + die "$(gettext "Cannot rebase onto multiple branches")" + fi + ;; +esac + +# Pulling into unborn branch: a shorthand for branching off +# FETCH_HEAD, for lazy typers. +if test -z "$orig_head" +then + # Two-way merge: we claim the index is based on an empty tree, + # and try to fast-forward to HEAD. This ensures we will not + # lose index/worktree changes that the user already made on + # the unborn branch. + empty_tree=4b825dc642cb6eb9a060e54bf8d69288fbee4904 + git read-tree -m -u $empty_tree $merge_head && + git update-ref -m "initial pull" HEAD $merge_head "$curr_head" + 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 $rebase_args $verbosity" + eval="$eval --onto $merge_head ${oldremoteref:-$merge_head}" + ;; +*) + eval="git-merge $diffstat $no_commit $verify_signatures $edit $squash $no_ff $ff_only" + eval="$eval $log_arg $strategy_args $merge_args $verbosity $progress" + eval="$eval \"\$merge_name\" HEAD $merge_head" + ;; +esac +eval "exec $eval" |