diff options
Diffstat (limited to 'git-pull.sh')
| -rwxr-xr-x | git-pull.sh | 112 |
1 files changed, 76 insertions, 36 deletions
diff --git a/git-pull.sh b/git-pull.sh index cab367ada0..9e69ada413 100755 --- a/git-pull.sh +++ b/git-pull.sh @@ -16,7 +16,8 @@ cd_to_toplevel test -z "$(git ls-files -u)" || die "You are in the middle of a conflicted merge." -strategy_args= diffstat= no_commit= squash= no_ff= log_arg= verbosity= +strategy_args= diffstat= no_commit= squash= no_ff= ff_only= +log_arg= verbosity= curr_branch=$(git symbolic-ref -q HEAD) curr_branch_short=$(echo "$curr_branch" | sed "s|refs/heads/||") rebase=$(git config --bool branch.$curr_branch_short.rebase) @@ -45,6 +46,8 @@ do 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) @@ -88,49 +91,93 @@ error_on_no_merge_candidates () { esac done - curr_branch=${curr_branch#refs/heads/} + if test true = "$rebase" + then + op_type=rebase + op_prep=against + else + op_type=merge + op_prep=with + fi - if [ -z "$curr_branch" ]; then + curr_branch=${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 branch you want to merge on the command" + 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." - else + elif [ -z "$upstream" ]; then echo "You asked me to pull without telling me which branch you" - echo "want to merge with, and 'branch.${curr_branch}.merge' in" - echo "your configuration file does not tell me either. Please" - echo "specify which branch you want to merge on the command line and" + 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 merge with the same branch, you may want to" - echo "configure the following variables in your configuration" - echo "file:" + 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 = "$op_type" && + echo " rebase = true" echo - echo " branch.${curr_branch}.remote = <nickname>" - echo " branch.${curr_branch}.merge = <remote-ref>" - echo " remote.<nickname>.url = <url>" - echo " remote.<nickname>.fetch = <refspec>" + 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 = "$rebase" && { - git update-index --ignore-submodules --refresh && - git diff-files --ignore-submodules --quiet && - git diff-index --ignore-submodules --cached --quiet HEAD -- || - die "refusing to pull with rebase: your working tree is not up-to-date" - + if ! git rev-parse -q --verify HEAD >/dev/null + then + # On an unborn branch + if test -f "$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 && - origin="$1" - test -z "$origin" && origin=$(get_default_remote) - reflist="$(get_remote_refs_for_fetch "$@" 2>/dev/null | - sed "s|refs/heads/\(.*\):|\1|")" && - oldremoteref="$(git rev-parse -q --verify \ - "refs/remotes/$origin/$reflist")" + remoteref="$(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 $verbosity --update-head-ok "$@" || exit 1 @@ -145,7 +192,7 @@ then # 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: fast-forwarding your working tree from" echo >&2 "Warning: commit $orig_head." git update-index -q --refresh git read-tree -u -m "$orig_head" "$curr_head" || @@ -164,14 +211,7 @@ merge_head=$(sed -e '/ not-for-merge /d' \ 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 $?;; - esac + error_on_no_merge_candidates "$@" ;; ?*' '?*) if test -z "$orig_head" @@ -196,5 +236,5 @@ merge_name=$(git fmt-merge-msg $log_arg <"$GIT_DIR/FETCH_HEAD") || exit test true = "$rebase" && exec git-rebase $diffstat $strategy_args --onto $merge_head \ ${oldremoteref:-$merge_head} -exec git-merge $diffstat $no_commit $squash $no_ff $log_arg $strategy_args \ +exec git-merge $diffstat $no_commit $squash $no_ff $ff_only $log_arg $strategy_args \ "$merge_name" HEAD $merge_head $verbosity |