diff options
author | Kyle Zhao <kylezhao@tencent.com> | 2022-11-12 02:45:13 +0300 |
---|---|---|
committer | Taylor Blau <me@ttaylorr.com> | 2022-11-13 07:53:04 +0300 |
commit | 66265a693e8deb3ab86577eb7f69940410044081 (patch) | |
tree | d2efd3dba5320d5efb55dade00c4ea9161e748bc /builtin/merge-tree.c | |
parent | ec1edbcb56ac05e9980299b05924c5c1b51d68b4 (diff) |
merge-tree.c: add --merge-base=<commit> option
This patch will give our callers more flexibility to use `git merge-tree`,
such as:
git merge-tree --write-tree --merge-base=branch^ HEAD branch
This does a merge of HEAD and branch, but uses branch^ as the merge-base.
And the reason why using an option flag instead of a positional argument
is to allow additional commits passed to merge-tree to be handled via an
octopus merge in the future.
Signed-off-by: Kyle Zhao <kylezhao@tencent.com>
Signed-off-by: Taylor Blau <me@ttaylorr.com>
Diffstat (limited to 'builtin/merge-tree.c')
-rw-r--r-- | builtin/merge-tree.c | 46 |
1 files changed, 35 insertions, 11 deletions
diff --git a/builtin/merge-tree.c b/builtin/merge-tree.c index fe853aa8f9..62c6d43cdb 100644 --- a/builtin/merge-tree.c +++ b/builtin/merge-tree.c @@ -3,6 +3,7 @@ #include "tree-walk.h" #include "xdiff-interface.h" #include "help.h" +#include "commit.h" #include "commit-reach.h" #include "merge-ort.h" #include "object-store.h" @@ -406,6 +407,7 @@ struct merge_tree_options { }; static int real_merge(struct merge_tree_options *o, + const char *merge_base, const char *branch1, const char *branch2, const char *prefix) { @@ -432,16 +434,31 @@ static int real_merge(struct merge_tree_options *o, opt.branch1 = branch1; opt.branch2 = branch2; - /* - * Get the merge bases, in reverse order; see comment above - * merge_incore_recursive in merge-ort.h - */ - merge_bases = get_merge_bases(parent1, parent2); - if (!merge_bases && !o->allow_unrelated_histories) - die(_("refusing to merge unrelated histories")); - merge_bases = reverse_commit_list(merge_bases); + if (merge_base) { + struct commit *base_commit; + struct tree *base_tree, *parent1_tree, *parent2_tree; + + base_commit = lookup_commit_reference_by_name(merge_base); + if (!base_commit) + die(_("could not lookup commit %s"), merge_base); + + opt.ancestor = merge_base; + base_tree = get_commit_tree(base_commit); + parent1_tree = get_commit_tree(parent1); + parent2_tree = get_commit_tree(parent2); + merge_incore_nonrecursive(&opt, base_tree, parent1_tree, parent2_tree, &result); + } else { + /* + * Get the merge bases, in reverse order; see comment above + * merge_incore_recursive in merge-ort.h + */ + merge_bases = get_merge_bases(parent1, parent2); + if (!merge_bases && !o->allow_unrelated_histories) + die(_("refusing to merge unrelated histories")); + merge_bases = reverse_commit_list(merge_bases); + merge_incore_recursive(&opt, merge_bases, parent1, parent2, &result); + } - merge_incore_recursive(&opt, merge_bases, parent1, parent2, &result); if (result.clean < 0) die(_("failure to merge")); @@ -487,6 +504,7 @@ int cmd_merge_tree(int argc, const char **argv, const char *prefix) struct merge_tree_options o = { .show_messages = -1 }; int expected_remaining_argc; int original_argc; + const char *merge_base = NULL; const char * const merge_tree_usage[] = { N_("git merge-tree [--write-tree] [<options>] <branch1> <branch2>"), @@ -515,6 +533,10 @@ int cmd_merge_tree(int argc, const char **argv, const char *prefix) &o.use_stdin, N_("perform multiple merges, one per line of input"), PARSE_OPT_NONEG), + OPT_STRING(0, "merge-base", + &merge_base, + N_("commit"), + N_("specify a merge-base for the merge")), OPT_END() }; @@ -529,6 +551,8 @@ int cmd_merge_tree(int argc, const char **argv, const char *prefix) if (o.mode == MODE_TRIVIAL) die(_("--trivial-merge is incompatible with all other options")); + if (merge_base) + die(_("--merge-base is incompatible with --stdin")); line_termination = '\0'; while (strbuf_getline_lf(&buf, stdin) != EOF) { struct strbuf **split; @@ -538,7 +562,7 @@ int cmd_merge_tree(int argc, const char **argv, const char *prefix) if (!split[0] || !split[1] || split[2]) die(_("malformed input line: '%s'."), buf.buf); strbuf_rtrim(split[0]); - result = real_merge(&o, split[0]->buf, split[1]->buf, prefix); + result = real_merge(&o, merge_base, split[0]->buf, split[1]->buf, prefix); if (result < 0) die(_("merging cannot continue; got unclean result of %d"), result); strbuf_list_free(split); @@ -581,7 +605,7 @@ int cmd_merge_tree(int argc, const char **argv, const char *prefix) /* Do the relevant type of merge */ if (o.mode == MODE_REAL) - return real_merge(&o, argv[0], argv[1], prefix); + return real_merge(&o, merge_base, argv[0], argv[1], prefix); else return trivial_merge(argv[0], argv[1], argv[2]); } |