diff options
Diffstat (limited to 'contrib/examples/git-merge.sh')
| -rwxr-xr-x | contrib/examples/git-merge.sh | 115 |
1 files changed, 90 insertions, 25 deletions
diff --git a/contrib/examples/git-merge.sh b/contrib/examples/git-merge.sh index 8f617fcb70..7b922c3948 100755 --- a/contrib/examples/git-merge.sh +++ b/contrib/examples/git-merge.sh @@ -15,7 +15,10 @@ 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) " @@ -25,26 +28,32 @@ require_work_tree cd_to_toplevel test -z "$(git ls-files -u)" || - die "You are in the middle of a conflicted merge." + die "Merge is not possible because you have unmerged files." + +! test -e "$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="$all_strategies recursive-ours recursive-theirs" +not_strategies='base file index tree' default_twohead_strategies='recursive' default_octopus_strategies='octopus' no_fast_forward_strategies='subtree ours' no_trivial_strategies='recursive recur subtree ours recursive-ours recursive-theirs' use_strategies= +xopt= allow_fast_forward=t +fast_forward_only= allow_trivial_merge=t -squash= no_commit= log_arg= +squash= no_commit= log_arg= rr_arg= dropsave() { rm -f -- "$GIT_DIR/MERGE_HEAD" "$GIT_DIR/MERGE_MSG" \ - "$GIT_DIR/MERGE_STASH" || exit 1 + "$GIT_DIR/MERGE_STASH" "$GIT_DIR/MERGE_MODE" || exit 1 } savestate() { @@ -131,21 +140,34 @@ finish () { merge_name () { remote="$1" rh=$(git rev-parse --verify "$remote^0" 2>/dev/null) || return - bh=$(git show-ref -s --verify "refs/heads/$remote" 2>/dev/null) - if test "$rh" = "$bh" - then - echo "$rh branch '$remote' of ." - elif truname=$(expr "$remote" : '\(.*\)~[1-9][0-9]*$') && + if truname=$(expr "$remote" : '\(.*\)~[0-9]*$') && git show-ref -q --verify "refs/heads/$truname" 2>/dev/null then echo "$rh branch '$truname' (early part) of ." - elif test "$remote" = "FETCH_HEAD" -a -r "$GIT_DIR/FETCH_HEAD" + 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 "$remote" = "FETCH_HEAD" -a -r "$GIT_DIR/FETCH_HEAD" then sed -e 's/ not-for-merge / /' -e 1q \ "$GIT_DIR/FETCH_HEAD" - else - echo "$rh commit '$remote'" + return fi + echo "$rh commit '$remote'" } parse_config () { @@ -172,16 +194,36 @@ parse_config () { --no-ff) test "$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$1 " ;; + use_strategies="$use_strategies$1 " + ;; *) - die "available strategies are: $all_strategies" ;; + 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="$1" @@ -245,6 +287,10 @@ then exit 1 fi + test "$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 "$1 - not something we can merge" @@ -261,12 +307,18 @@ else # the given message. If remote is invalid we will die # later in the common codepath so we discard the error # in this loop. - merge_name=$(for remote + merge_msg="$( + for remote do merge_name "$remote" - done | git fmt-merge-msg $log_arg - ) - merge_msg="${merge_msg:+$merge_msg$LF$LF}$merge_name" + 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 "$head_arg"^0) || usage @@ -335,7 +387,7 @@ case "$#" in common=$(git merge-base --all $head "$@") ;; *) - common=$(git show-branch --merge-base $head "$@") + common=$(git merge-base --all --octopus $head "$@") ;; esac echo "$head" >"$GIT_DIR/ORIG_HEAD" @@ -373,8 +425,8 @@ t,1,"$head",*) # We are not doing octopus, not fast-forward, and have only # one common. git update-index --refresh 2>/dev/null - case "$allow_trivial_merge" in - t) + 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..." @@ -413,6 +465,11 @@ t,1,"$head",*) ;; esac +if test "$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 @@ -451,7 +508,7 @@ do # Remember which strategy left the state in the working tree wt_strategy=$strategy - git-merge-$strategy $common -- "$head_arg" "$@" + eval 'git-merge-$strategy '"$xopt"' $common -- "$head_arg" "$@"' exit=$? if test "$no_commit" = t && test "$exit" = 0 then @@ -489,9 +546,9 @@ if test '' != "$result_tree" then if test "$allow_fast_forward" = "t" then - parents=$(git show-branch --independent "$head" "$@") + parents=$(git merge-base --independent "$head" "$@") else - parents=$(git rev-parse "$head" "$@") + parents=$(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 @@ -533,7 +590,15 @@ else do echo $remote done >"$GIT_DIR/MERGE_HEAD" - printf '%s\n' "$merge_msg" >"$GIT_DIR/MERGE_MSG" + 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 @@ -550,6 +615,6 @@ Conflicts: sed -e 's/^[^ ]* / /' | uniq } >>"$GIT_DIR/MERGE_MSG" - git rerere + git rerere $rr_arg die "Automatic merge failed; fix conflicts and then commit the result." fi |