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Diffstat (limited to 'contrib/examples/git-merge.sh')
| -rwxr-xr-x | contrib/examples/git-merge.sh | 620 |
1 files changed, 0 insertions, 620 deletions
diff --git a/contrib/examples/git-merge.sh b/contrib/examples/git-merge.sh deleted file mode 100755 index 932e78dbfe..0000000000 --- a/contrib/examples/git-merge.sh +++ /dev/null @@ -1,620 +0,0 @@ -#!/bin/sh -# -# Copyright (c) 2005 Junio C Hamano -# - -OPTIONS_KEEPDASHDASH= -OPTIONS_SPEC="\ -git merge [options] <remote>... -git merge [options] <msg> HEAD <remote> --- -stat show a diffstat at the end of the merge -n don't show a diffstat at the end of the merge -summary (synonym to --stat) -log add list of one-line log to merge commit message -squash create a single commit instead of doing a merge -commit perform a commit if the merge succeeds (default) -ff allow fast-forward (default) -ff-only abort if fast-forward is not possible -rerere-autoupdate update index with any reused conflict resolution -s,strategy= merge strategy to use -X= option for selected merge strategy -m,message= message to be used for the merge commit (if any) -" - -SUBDIRECTORY_OK=Yes -. git-sh-setup -require_work_tree -cd_to_toplevel - -test -z "$(git ls-files -u)" || - die "Merge is not possible because you have unmerged files." - -! test -e "$GIT_DIR/MERGE_HEAD" || - die 'You have not concluded your merge (MERGE_HEAD exists).' - -LF=' -' - -all_strategies='recur recursive octopus resolve stupid ours subtree' -all_strategies="$all_strategies recursive-ours recursive-theirs" -not_strategies='base file index tree' -default_twohead_strategies='recursive' -default_octopus_strategies='octopus' -no_fast_forward_strategies='subtree ours' -no_trivial_strategies='recursive recur subtree ours recursive-ours recursive-theirs' -use_strategies= -xopt= - -allow_fast_forward=t -fast_forward_only= -allow_trivial_merge=t -squash= no_commit= log_arg= rr_arg= - -dropsave() { - rm -f -- "$GIT_DIR/MERGE_HEAD" "$GIT_DIR/MERGE_MSG" \ - "$GIT_DIR/MERGE_STASH" "$GIT_DIR/MERGE_MODE" || exit 1 -} - -savestate() { - # Stash away any local modifications. - git stash create >"$GIT_DIR/MERGE_STASH" -} - -restorestate() { - if test -f "$GIT_DIR/MERGE_STASH" - then - git reset --hard $head >/dev/null - git stash apply $(cat "$GIT_DIR/MERGE_STASH") - git update-index --refresh >/dev/null - fi -} - -finish_up_to_date () { - case "$squash" in - t) - echo "$1 (nothing to squash)" ;; - '') - echo "$1" ;; - esac - dropsave -} - -squash_message () { - echo Squashed commit of the following: - echo - git log --no-merges --pretty=medium ^"$head" $remoteheads -} - -finish () { - if test '' = "$2" - then - rlogm="$GIT_REFLOG_ACTION" - else - echo "$2" - rlogm="$GIT_REFLOG_ACTION: $2" - fi - case "$squash" in - t) - echo "Squash commit -- not updating HEAD" - squash_message >"$GIT_DIR/SQUASH_MSG" - ;; - '') - case "$merge_msg" in - '') - echo "No merge message -- not updating HEAD" - ;; - *) - git update-ref -m "$rlogm" HEAD "$1" "$head" || exit 1 - git gc --auto - ;; - esac - ;; - esac - case "$1" in - '') - ;; - ?*) - if test "$show_diffstat" = t - then - # We want color (if set), but no pager - GIT_PAGER='' git diff --stat --summary -M "$head" "$1" - fi - ;; - esac - - # Run a post-merge hook - if test -x "$GIT_DIR"/hooks/post-merge - then - case "$squash" in - t) - "$GIT_DIR"/hooks/post-merge 1 - ;; - '') - "$GIT_DIR"/hooks/post-merge 0 - ;; - esac - fi -} - -merge_name () { - remote="$1" - rh=$(git rev-parse --verify "$remote^0" 2>/dev/null) || return - if truname=$(expr "$remote" : '\(.*\)~[0-9]*$') && - git show-ref -q --verify "refs/heads/$truname" 2>/dev/null - then - echo "$rh branch '$truname' (early part) of ." - return - fi - if found_ref=$(git rev-parse --symbolic-full-name --verify \ - "$remote" 2>/dev/null) - then - expanded=$(git check-ref-format --branch "$remote") || - exit - if test "${found_ref#refs/heads/}" != "$found_ref" - then - echo "$rh branch '$expanded' of ." - return - elif test "${found_ref#refs/remotes/}" != "$found_ref" - then - echo "$rh remote branch '$expanded' of ." - return - fi - fi - if test "$remote" = "FETCH_HEAD" && test -r "$GIT_DIR/FETCH_HEAD" - then - sed -e 's/ not-for-merge / /' -e 1q \ - "$GIT_DIR/FETCH_HEAD" - return - fi - echo "$rh commit '$remote'" -} - -parse_config () { - while test $# != 0; do - case "$1" in - -n|--no-stat|--no-summary) - show_diffstat=false ;; - --stat|--summary) - show_diffstat=t ;; - --log|--no-log) - log_arg=$1 ;; - --squash) - test "$allow_fast_forward" = t || - die "You cannot combine --squash with --no-ff." - squash=t no_commit=t ;; - --no-squash) - squash= no_commit= ;; - --commit) - no_commit= ;; - --no-commit) - no_commit=t ;; - --ff) - allow_fast_forward=t ;; - --no-ff) - test "$squash" != t || - die "You cannot combine --squash with --no-ff." - test "$fast_forward_only" != t || - die "You cannot combine --ff-only with --no-ff." - allow_fast_forward=f ;; - --ff-only) - test "$allow_fast_forward" != f || - die "You cannot combine --ff-only with --no-ff." - fast_forward_only=t ;; - --rerere-autoupdate|--no-rerere-autoupdate) - rr_arg=$1 ;; - -s|--strategy) - shift - case " $all_strategies " in - *" $1 "*) - use_strategies="$use_strategies$1 " - ;; - *) - case " $not_strategies " in - *" $1 "*) - false - esac && - type "git-merge-$1" >/dev/null 2>&1 || - die "available strategies are: $all_strategies" - use_strategies="$use_strategies$1 " - ;; - esac - ;; - -X) - shift - xopt="${xopt:+$xopt }$(git rev-parse --sq-quote "--$1")" - ;; - -m|--message) - shift - merge_msg="$1" - have_message=t - ;; - --) - shift - break ;; - *) usage ;; - esac - shift - done - args_left=$# -} - -test $# != 0 || usage - -have_message= - -if branch=$(git-symbolic-ref -q HEAD) -then - mergeopts=$(git config "branch.${branch#refs/heads/}.mergeoptions") - if test -n "$mergeopts" - then - parse_config $mergeopts -- - fi -fi - -parse_config "$@" -while test $args_left -lt $#; do shift; done - -if test -z "$show_diffstat"; then - test "$(git config --bool merge.diffstat)" = false && show_diffstat=false - test "$(git config --bool merge.stat)" = false && show_diffstat=false - test -z "$show_diffstat" && show_diffstat=t -fi - -# This could be traditional "merge <msg> HEAD <commit>..." and the -# way we can tell it is to see if the second token is HEAD, but some -# people might have misused the interface and used a commit-ish that -# is the same as HEAD there instead. Traditional format never would -# have "-m" so it is an additional safety measure to check for it. - -if test -z "$have_message" && - second_token=$(git rev-parse --verify "$2^0" 2>/dev/null) && - head_commit=$(git rev-parse --verify "HEAD" 2>/dev/null) && - test "$second_token" = "$head_commit" -then - merge_msg="$1" - shift - head_arg="$1" - shift -elif ! git rev-parse --verify HEAD >/dev/null 2>&1 -then - # If the merged head is a valid one there is no reason to - # forbid "git merge" into a branch yet to be born. We do - # the same for "git pull". - if test 1 -ne $# - then - echo >&2 "Can merge only exactly one commit into empty head" - exit 1 - fi - - test "$squash" != t || - die "Squash commit into empty head not supported yet" - test "$allow_fast_forward" = t || - die "Non-fast-forward into an empty head does not make sense" - rh=$(git rev-parse --verify "$1^0") || - die "$1 - not something we can merge" - - git update-ref -m "initial pull" HEAD "$rh" "" && - git read-tree --reset -u HEAD - exit - -else - # We are invoked directly as the first-class UI. - head_arg=HEAD - - # All the rest are the commits being merged; prepare - # the standard merge summary message to be appended to - # the given message. If remote is invalid we will die - # later in the common codepath so we discard the error - # in this loop. - merge_msg="$( - for remote - do - merge_name "$remote" - done | - if test "$have_message" = t - then - git fmt-merge-msg -m "$merge_msg" $log_arg - else - git fmt-merge-msg $log_arg - fi - )" -fi -head=$(git rev-parse --verify "$head_arg"^0) || usage - -# All the rest are remote heads -test "$#" = 0 && usage ;# we need at least one remote head. -set_reflog_action "merge $*" - -remoteheads= -for remote -do - remotehead=$(git rev-parse --verify "$remote"^0 2>/dev/null) || - die "$remote - not something we can merge" - remoteheads="${remoteheads}$remotehead " - eval GITHEAD_$remotehead='"$remote"' - export GITHEAD_$remotehead -done -set x $remoteheads ; shift - -case "$use_strategies" in -'') - case "$#" in - 1) - var="$(git config --get pull.twohead)" - if test -n "$var" - then - use_strategies="$var" - else - use_strategies="$default_twohead_strategies" - fi ;; - *) - var="$(git config --get pull.octopus)" - if test -n "$var" - then - use_strategies="$var" - else - use_strategies="$default_octopus_strategies" - fi ;; - esac - ;; -esac - -for s in $use_strategies -do - for ss in $no_fast_forward_strategies - do - case " $s " in - *" $ss "*) - allow_fast_forward=f - break - ;; - esac - done - for ss in $no_trivial_strategies - do - case " $s " in - *" $ss "*) - allow_trivial_merge=f - break - ;; - esac - done -done - -case "$#" in -1) - common=$(git merge-base --all $head "$@") - ;; -*) - common=$(git merge-base --all --octopus $head "$@") - ;; -esac -echo "$head" >"$GIT_DIR/ORIG_HEAD" - -case "$allow_fast_forward,$#,$common,$no_commit" in -?,*,'',*) - # No common ancestors found. We need a real merge. - ;; -?,1,"$1",*) - # If head can reach all the merge then we are up to date. - # but first the most common case of merging one remote. - finish_up_to_date "Already up to date." - exit 0 - ;; -t,1,"$head",*) - # Again the most common case of merging one remote. - echo "Updating $(git rev-parse --short $head)..$(git rev-parse --short $1)" - git update-index --refresh 2>/dev/null - msg="Fast-forward" - if test -n "$have_message" - then - msg="$msg (no commit created; -m option ignored)" - fi - new_head=$(git rev-parse --verify "$1^0") && - git read-tree -v -m -u --exclude-per-directory=.gitignore $head "$new_head" && - finish "$new_head" "$msg" || exit - dropsave - exit 0 - ;; -?,1,?*"$LF"?*,*) - # We are not doing octopus and not fast-forward. Need a - # real merge. - ;; -?,1,*,) - # We are not doing octopus, not fast-forward, and have only - # one common. - git update-index --refresh 2>/dev/null - case "$allow_trivial_merge,$fast_forward_only" in - t,) - # See if it is really trivial. - git var GIT_COMMITTER_IDENT >/dev/null || exit - echo "Trying really trivial in-index merge..." - if git read-tree --trivial -m -u -v $common $head "$1" && - result_tree=$(git write-tree) - then - echo "Wonderful." - result_commit=$( - printf '%s\n' "$merge_msg" | - git commit-tree $result_tree -p HEAD -p "$1" - ) || exit - finish "$result_commit" "In-index merge" - dropsave - exit 0 - fi - echo "Nope." - esac - ;; -*) - # An octopus. If we can reach all the remote we are up to date. - up_to_date=t - for remote - do - common_one=$(git merge-base --all $head $remote) - if test "$common_one" != "$remote" - then - up_to_date=f - break - fi - done - if test "$up_to_date" = t - then - finish_up_to_date "Already up to date. Yeeah!" - exit 0 - fi - ;; -esac - -if test "$fast_forward_only" = t -then - die "Not possible to fast-forward, aborting." -fi - -# We are going to make a new commit. -git var GIT_COMMITTER_IDENT >/dev/null || exit - -# At this point, we need a real merge. No matter what strategy -# we use, it would operate on the index, possibly affecting the -# working tree, and when resolved cleanly, have the desired tree -# in the index -- this means that the index must be in sync with -# the $head commit. The strategies are responsible to ensure this. - -case "$use_strategies" in -?*' '?*) - # Stash away the local changes so that we can try more than one. - savestate - single_strategy=no - ;; -*) - rm -f "$GIT_DIR/MERGE_STASH" - single_strategy=yes - ;; -esac - -result_tree= best_cnt=-1 best_strategy= wt_strategy= -merge_was_ok= -for strategy in $use_strategies -do - test "$wt_strategy" = '' || { - echo "Rewinding the tree to pristine..." - restorestate - } - case "$single_strategy" in - no) - echo "Trying merge strategy $strategy..." - ;; - esac - - # Remember which strategy left the state in the working tree - wt_strategy=$strategy - - eval 'git-merge-$strategy '"$xopt"' $common -- "$head_arg" "$@"' - exit=$? - if test "$no_commit" = t && test "$exit" = 0 - then - merge_was_ok=t - exit=1 ;# pretend it left conflicts. - fi - - test "$exit" = 0 || { - - # The backend exits with 1 when conflicts are left to be resolved, - # with 2 when it does not handle the given merge at all. - - if test "$exit" -eq 1 - then - cnt=$({ - git diff-files --name-only - git ls-files --unmerged - } | wc -l) - if test $best_cnt -le 0 || test $cnt -le $best_cnt - then - best_strategy=$strategy - best_cnt=$cnt - fi - fi - continue - } - - # Automerge succeeded. - result_tree=$(git write-tree) && break -done - -# If we have a resulting tree, that means the strategy module -# auto resolved the merge cleanly. -if test '' != "$result_tree" -then - if test "$allow_fast_forward" = "t" - then - parents=$(git merge-base --independent "$head" "$@") - else - parents=$(git rev-parse "$head" "$@") - fi - parents=$(echo "$parents" | sed -e 's/^/-p /') - result_commit=$(printf '%s\n' "$merge_msg" | git commit-tree $result_tree $parents) || exit - finish "$result_commit" "Merge made by $wt_strategy." - dropsave - exit 0 -fi - -# Pick the result from the best strategy and have the user fix it up. -case "$best_strategy" in -'') - restorestate - case "$use_strategies" in - ?*' '?*) - echo >&2 "No merge strategy handled the merge." - ;; - *) - echo >&2 "Merge with strategy $use_strategies failed." - ;; - esac - exit 2 - ;; -"$wt_strategy") - # We already have its result in the working tree. - ;; -*) - echo "Rewinding the tree to pristine..." - restorestate - echo "Using the $best_strategy to prepare resolving by hand." - git-merge-$best_strategy $common -- "$head_arg" "$@" - ;; -esac - -if test "$squash" = t -then - finish -else - for remote - do - echo $remote - done >"$GIT_DIR/MERGE_HEAD" - printf '%s\n' "$merge_msg" >"$GIT_DIR/MERGE_MSG" || - die "Could not write to $GIT_DIR/MERGE_MSG" - if test "$allow_fast_forward" != t - then - printf "%s" no-ff - else - : - fi >"$GIT_DIR/MERGE_MODE" || - die "Could not write to $GIT_DIR/MERGE_MODE" -fi - -if test "$merge_was_ok" = t -then - echo >&2 \ - "Automatic merge went well; stopped before committing as requested" - exit 0 -else - { - echo ' -Conflicts: -' - git ls-files --unmerged | - sed -e 's/^[^ ]* / /' | - uniq - } >>"$GIT_DIR/MERGE_MSG" - git rerere $rr_arg - die "Automatic merge failed; fix conflicts and then commit the result." -fi |