diff options
Diffstat (limited to 'git-pull.sh')
| -rwxr-xr-x | git-pull.sh | 239 |
1 files changed, 200 insertions, 39 deletions
diff --git a/git-pull.sh b/git-pull.sh index a3665d7751..246a3a4b37 100755 --- a/git-pull.sh +++ b/git-pull.sh @@ -4,28 +4,72 @@ # # Fetch one or more remote refs and merge it/them into the current HEAD. -USAGE='[-n | --no-summary] [--no-commit] [-s strategy]... [<fetch-options>] <repo> <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_summary= no_commit= squash= -while case "$#,$1" in 0) break ;; *,-*) ;; *) break ;; esac +die_conflict () { + git diff-index --cached --name-status -r --ignore-submodules HEAD -- + if [ $(git config --bool --get advice.resolveConflict || echo true) = "true" ]; then + die "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 "Pull is not possible because you have unmerged files." + fi +} + +die_merge () { + if [ $(git config --bool --get advice.resolveConflict || echo true) = "true" ]; then + die "You have not concluded your merge (MERGE_HEAD exists). +Please, commit your changes before you can merge." + else + die "You have not concluded your merge (MERGE_HEAD exists)." + fi +} + +test -z "$(git ls-files -u)" || die_conflict +test -f "$GIT_DIR/MERGE_HEAD" && die_merge + +strategy_args= diffstat= no_commit= squash= no_ff= ff_only= +log_arg= verbosity= +merge_args= +curr_branch=$(git symbolic-ref -q HEAD) +curr_branch_short="${curr_branch#refs/heads/}" +rebase=$(git config --bool branch.$curr_branch_short.rebase) +while : do case "$1" in - -n|--n|--no|--no-|--no-s|--no-su|--no-sum|--no-summ|\ - --no-summa|--no-summar|--no-summary) - no_summary=-n ;; + -q|--quiet) + verbosity="$verbosity -q" ;; + -v|--verbose) + verbosity="$verbosity -v" ;; + -n|--no-stat|--no-summary) + diffstat=--no-stat ;; + --stat|--summary) + diffstat=--stat ;; + --log|--no-log) + log_arg=$1 ;; --no-c|--no-co|--no-com|--no-comm|--no-commi|--no-commit) no_commit=--no-commit ;; + --c|--co|--com|--comm|--commi|--commit) + no_commit=--commit ;; --sq|--squ|--squa|--squas|--squash) squash=--squash ;; + --no-sq|--no-squ|--no-squa|--no-squas|--no-squash) + squash=--no-squash ;; + --ff) + no_ff=--ff ;; + --no-ff) + no_ff=--no-ff ;; + --ff-only) + ff_only=--ff-only ;; -s=*|--s=*|--st=*|--str=*|--stra=*|--strat=*|--strate=*|\ --strateg=*|--strategy=*|\ -s|--s|--st|--str|--stra|--strat|--strate|--strateg|--strategy) @@ -40,22 +84,140 @@ do esac strategy_args="${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$xx " + ;; + -r|--r|--re|--reb|--reba|--rebas|--rebase) + rebase=true + ;; + --no-r|--no-re|--no-reb|--no-reba|--no-rebas|--no-rebase) + rebase=false + ;; -h|--h|--he|--hel|--help) usage ;; - -*) - # Pass thru anything that is meant for fetch. + *) + # Pass thru anything that may be meant for fetch. break ;; esac shift done -orig_head=$(git-rev-parse --verify HEAD 2>/dev/null) -git-fetch --update-head-ok "$@" || exit 1 +error_on_no_merge_candidates () { + exec >&2 + for opt + do + case "$opt" in + -t|--t|--ta|--tag|--tags) + echo "Fetching tags only, you probably meant:" + echo " git fetch --tags" + exit 1 + esac + done -curr_head=$(git-rev-parse --verify HEAD 2>/dev/null) -if test "$curr_head" != "$orig_head" + if test true = "$rebase" + then + op_type=rebase + op_prep=against + else + op_type=merge + op_prep=with + fi + + 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 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." + elif [ -z "$upstream" ]; then + echo "You asked me to pull without telling me which branch you" + 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 $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 " [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 = "$rebase" && { + if ! git rev-parse -q --verify HEAD >/dev/null + then + # On an unborn branch + if test -f "$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 && + 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 + +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. @@ -64,10 +226,10 @@ 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 $orig_head." - git-update-index --refresh 2>/dev/null - git-read-tree -u -m "$orig_head" "$curr_head" || + git update-index -q --refresh + git read-tree -u -m "$orig_head" "$curr_head" || die 'Cannot fast-forward your working tree. After making sure that you saved anything precious from $ git diff '$orig_head' @@ -83,38 +245,37 @@ merge_head=$(sed -e '/ not-for-merge /d' \ case "$merge_head" in '') - curr_branch=$(git-symbolic-ref -q HEAD) - case $? in - 0) ;; - 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 $?;; - esac - curr_branch=${curr_branch#refs/heads/} - - echo >&2 "Warning: No merge candidate found because value of config option - \"branch.${curr_branch}.merge\" does not match any remote branch fetched." - echo >&2 "No changes." - exit 0 + error_on_no_merge_candidates "$@" ;; ?*' '?*) if test -z "$orig_head" then - echo >&2 "Cannot merge multiple branches into empty head" - exit 1 + die "Cannot merge multiple branches into empty head" + fi + if test true = "$rebase" + then + die "Cannot rebase onto multiple branches" 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 + git update-ref -m "initial pull" HEAD $merge_head "$curr_head" && + git read-tree --reset -u HEAD || exit 1 exit fi -merge_name=$(git-fmt-merge-msg <"$GIT_DIR/FETCH_HEAD") || exit -exec git-merge $no_summary $no_commit $squash $strategy_args \ - "$merge_name" HEAD $merge_head +merge_name=$(git fmt-merge-msg $log_arg <"$GIT_DIR/FETCH_HEAD") || exit +case "$rebase" in +true) + eval="git-rebase $diffstat $strategy_args $merge_args" + eval="$eval --onto $merge_head ${oldremoteref:-$merge_head}" + ;; +*) + eval="git-merge $diffstat $no_commit $squash $no_ff $ff_only" + eval="$eval $log_arg $strategy_args $merge_args" + eval="$eval \"\$merge_name\" HEAD $merge_head $verbosity" + ;; +esac +eval "exec $eval" |