diff options
Diffstat (limited to 'builtin/merge.c')
-rw-r--r-- | builtin/merge.c | 467 |
1 files changed, 250 insertions, 217 deletions
diff --git a/builtin/merge.c b/builtin/merge.c index 3a451727d0..34a6166b52 100644 --- a/builtin/merge.c +++ b/builtin/merge.c @@ -40,19 +40,18 @@ struct strategy { }; static const char * const builtin_merge_usage[] = { - "git merge [options] [<commit>...]", - "git merge [options] <msg> HEAD <commit>", - "git merge --abort", + N_("git merge [options] [<commit>...]"), + N_("git merge [options] <msg> HEAD <commit>"), + N_("git merge --abort"), NULL }; static int show_diffstat = 1, shortlog_len = -1, squash; -static int option_commit = 1, allow_fast_forward = 1; -static int fast_forward_only, option_edit; -static int allow_trivial = 1, have_message; +static int option_commit = 1; +static int option_edit = -1; +static int allow_trivial = 1, have_message, verify_signatures; static int overwrite_ignore = 1; static struct strbuf merge_msg = STRBUF_INIT; -static struct commit_list *remoteheads; static struct strategy **use_strategies; static size_t use_strategies_nr, use_strategies_alloc; static const char **xopts; @@ -77,6 +76,14 @@ static struct strategy all_strategy[] = { static const char *pull_twohead, *pull_octopus; +enum ff_type { + FF_NO, + FF_ALLOW, + FF_ONLY +}; + +static enum ff_type fast_forward = FF_ALLOW; + static int option_parse_message(const struct option *opt, const char *arg, int unset) { @@ -179,41 +186,50 @@ static int option_parse_n(const struct option *opt, return 0; } +static int option_parse_ff_only(const struct option *opt, + const char *arg, int unset) +{ + fast_forward = FF_ONLY; + return 0; +} + static struct option builtin_merge_options[] = { { OPTION_CALLBACK, 'n', NULL, NULL, NULL, - "do not show a diffstat at the end of the merge", + N_("do not show a diffstat at the end of the merge"), PARSE_OPT_NOARG, option_parse_n }, OPT_BOOLEAN(0, "stat", &show_diffstat, - "show a diffstat at the end of the merge"), - OPT_BOOLEAN(0, "summary", &show_diffstat, "(synonym to --stat)"), - { OPTION_INTEGER, 0, "log", &shortlog_len, "n", - "add (at most <n>) entries from shortlog to merge commit message", + N_("show a diffstat at the end of the merge")), + OPT_BOOLEAN(0, "summary", &show_diffstat, N_("(synonym to --stat)")), + { OPTION_INTEGER, 0, "log", &shortlog_len, N_("n"), + N_("add (at most <n>) entries from shortlog to merge commit message"), PARSE_OPT_OPTARG, NULL, DEFAULT_MERGE_LOG_LEN }, OPT_BOOLEAN(0, "squash", &squash, - "create a single commit instead of doing a merge"), + N_("create a single commit instead of doing a merge")), OPT_BOOLEAN(0, "commit", &option_commit, - "perform a commit if the merge succeeds (default)"), - OPT_BOOLEAN('e', "edit", &option_edit, - "edit message before committing"), - OPT_BOOLEAN(0, "ff", &allow_fast_forward, - "allow fast-forward (default)"), - OPT_BOOLEAN(0, "ff-only", &fast_forward_only, - "abort if fast-forward is not possible"), + N_("perform a commit if the merge succeeds (default)")), + OPT_BOOL('e', "edit", &option_edit, + N_("edit message before committing")), + OPT_SET_INT(0, "ff", &fast_forward, N_("allow fast-forward (default)"), FF_ALLOW), + { OPTION_CALLBACK, 0, "ff-only", NULL, NULL, + N_("abort if fast-forward is not possible"), + PARSE_OPT_NOARG | PARSE_OPT_NONEG, option_parse_ff_only }, OPT_RERERE_AUTOUPDATE(&allow_rerere_auto), - OPT_CALLBACK('s', "strategy", &use_strategies, "strategy", - "merge strategy to use", option_parse_strategy), - OPT_CALLBACK('X', "strategy-option", &xopts, "option=value", - "option for selected merge strategy", option_parse_x), - OPT_CALLBACK('m', "message", &merge_msg, "message", - "merge commit message (for a non-fast-forward merge)", + OPT_BOOL(0, "verify-signatures", &verify_signatures, + N_("Verify that the named commit has a valid GPG signature")), + OPT_CALLBACK('s', "strategy", &use_strategies, N_("strategy"), + N_("merge strategy to use"), option_parse_strategy), + OPT_CALLBACK('X', "strategy-option", &xopts, N_("option=value"), + N_("option for selected merge strategy"), option_parse_x), + OPT_CALLBACK('m', "message", &merge_msg, N_("message"), + N_("merge commit message (for a non-fast-forward merge)"), option_parse_message), OPT__VERBOSITY(&verbosity), OPT_BOOLEAN(0, "abort", &abort_current_merge, - "abort the current in-progress merge"), - OPT_SET_INT(0, "progress", &show_progress, "force progress reporting", 1), - { OPTION_STRING, 'S', "gpg-sign", &sign_commit, "key id", - "GPG sign commit", PARSE_OPT_OPTARG, NULL, (intptr_t) "" }, - OPT_BOOLEAN(0, "overwrite-ignore", &overwrite_ignore, "update ignored files (default)"), + N_("abort the current in-progress merge")), + OPT_SET_INT(0, "progress", &show_progress, N_("force progress reporting"), 1), + { OPTION_STRING, 'S', "gpg-sign", &sign_commit, N_("key id"), + N_("GPG sign commit"), PARSE_OPT_OPTARG, NULL, (intptr_t) "" }, + OPT_BOOLEAN(0, "overwrite-ignore", &overwrite_ignore, N_("update ignored files (default)")), OPT_END() }; @@ -318,7 +334,7 @@ static void finish_up_to_date(const char *msg) drop_save(); } -static void squash_message(struct commit *commit) +static void squash_message(struct commit *commit, struct commit_list *remoteheads) { struct rev_info rev; struct strbuf out = STRBUF_INIT; @@ -366,6 +382,7 @@ static void squash_message(struct commit *commit) } static void finish(struct commit *head_commit, + struct commit_list *remoteheads, const unsigned char *new_head, const char *msg) { struct strbuf reflog_message = STRBUF_INIT; @@ -380,7 +397,7 @@ static void finish(struct commit *head_commit, getenv("GIT_REFLOG_ACTION"), msg); } if (squash) { - squash_message(head_commit); + squash_message(head_commit, remoteheads); } else { if (verbosity >= 0 && !merge_msg.len) printf(_("No merge message -- not updating HEAD\n")); @@ -399,11 +416,12 @@ static void finish(struct commit *head_commit, if (new_head && show_diffstat) { struct diff_options opts; diff_setup(&opts); + opts.stat_width = -1; /* use full terminal width */ + opts.stat_graph_width = -1; /* respect statGraphWidth config */ opts.output_format |= DIFF_FORMAT_SUMMARY | DIFF_FORMAT_DIFFSTAT; opts.detect_rename = DIFF_DETECT_RENAME; - if (diff_setup_done(&opts) < 0) - die(_("diff_setup_done failed")); + diff_setup_done(&opts); diff_tree_sha1(head, new_head, "", &opts); diffcore_std(&opts); diff_flush(&opts); @@ -515,6 +533,19 @@ static void merge_name(const char *remote, struct strbuf *msg) strbuf_release(&line); goto cleanup; } + + if (remote_head->util) { + struct merge_remote_desc *desc; + desc = merge_remote_util(remote_head); + if (desc && desc->obj && desc->obj->type == OBJ_TAG) { + strbuf_addf(msg, "%s\t\t%s '%s'\n", + sha1_to_hex(desc->obj->sha1), + typename(desc->obj->type), + remote); + goto cleanup; + } + } + strbuf_addf(msg, "%s\t\tcommit '%s'\n", sha1_to_hex(remote_head->object.sha1), remote); cleanup: @@ -565,10 +596,9 @@ static int git_merge_config(const char *k, const char *v, void *cb) else if (!strcmp(k, "merge.ff")) { int boolval = git_config_maybe_bool(k, v); if (0 <= boolval) { - allow_fast_forward = boolval; + fast_forward = boolval ? FF_ALLOW : FF_NO; } else if (v && !strcmp(v, "only")) { - allow_fast_forward = 1; - fast_forward_only = 1; + fast_forward = FF_ONLY; } /* do not barf on values from future versions of git */ return 0; } else if (!strcmp(k, "merge.defaulttoupstream")) { @@ -627,60 +657,8 @@ static void write_tree_trivial(unsigned char *sha1) die(_("git write-tree failed to write a tree")); } -static const char *merge_argument(struct commit *commit) -{ - if (commit) - return sha1_to_hex(commit->object.sha1); - else - return EMPTY_TREE_SHA1_HEX; -} - -int try_merge_command(const char *strategy, size_t xopts_nr, - const char **xopts, struct commit_list *common, - const char *head_arg, struct commit_list *remotes) -{ - const char **args; - int i = 0, x = 0, ret; - struct commit_list *j; - struct strbuf buf = STRBUF_INIT; - - args = xmalloc((4 + xopts_nr + commit_list_count(common) + - commit_list_count(remotes)) * sizeof(char *)); - strbuf_addf(&buf, "merge-%s", strategy); - args[i++] = buf.buf; - for (x = 0; x < xopts_nr; x++) { - char *s = xmalloc(strlen(xopts[x])+2+1); - strcpy(s, "--"); - strcpy(s+2, xopts[x]); - args[i++] = s; - } - for (j = common; j; j = j->next) - args[i++] = xstrdup(merge_argument(j->item)); - args[i++] = "--"; - args[i++] = head_arg; - for (j = remotes; j; j = j->next) - args[i++] = xstrdup(merge_argument(j->item)); - args[i] = NULL; - ret = run_command_v_opt(args, RUN_GIT_CMD); - strbuf_release(&buf); - i = 1; - for (x = 0; x < xopts_nr; x++) - free((void *)args[i++]); - for (j = common; j; j = j->next) - free((void *)args[i++]); - i += 2; - for (j = remotes; j; j = j->next) - free((void *)args[i++]); - free(args); - discard_cache(); - if (read_cache() < 0) - die(_("failed to read the cache")); - resolve_undo_clear(); - - return ret; -} - static int try_merge_strategy(const char *strategy, struct commit_list *common, + struct commit_list *remoteheads, struct commit *head, const char *head_arg) { int index_fd; @@ -760,56 +738,6 @@ static int count_unmerged_entries(void) return ret; } -int checkout_fast_forward(const unsigned char *head, const unsigned char *remote) -{ - struct tree *trees[MAX_UNPACK_TREES]; - struct unpack_trees_options opts; - struct tree_desc t[MAX_UNPACK_TREES]; - int i, fd, nr_trees = 0; - struct dir_struct dir; - struct lock_file *lock_file = xcalloc(1, sizeof(struct lock_file)); - - refresh_cache(REFRESH_QUIET); - - fd = hold_locked_index(lock_file, 1); - - memset(&trees, 0, sizeof(trees)); - memset(&opts, 0, sizeof(opts)); - memset(&t, 0, sizeof(t)); - if (overwrite_ignore) { - memset(&dir, 0, sizeof(dir)); - dir.flags |= DIR_SHOW_IGNORED; - setup_standard_excludes(&dir); - opts.dir = &dir; - } - - opts.head_idx = 1; - opts.src_index = &the_index; - opts.dst_index = &the_index; - opts.update = 1; - opts.verbose_update = 1; - opts.merge = 1; - opts.fn = twoway_merge; - setup_unpack_trees_porcelain(&opts, "merge"); - - trees[nr_trees] = parse_tree_indirect(head); - if (!trees[nr_trees++]) - return -1; - trees[nr_trees] = parse_tree_indirect(remote); - if (!trees[nr_trees++]) - return -1; - for (i = 0; i < nr_trees; i++) { - parse_tree(trees[i]); - init_tree_desc(t+i, trees[i]->buffer, trees[i]->size); - } - if (unpack_trees(nr_trees, t, &opts)) - return -1; - if (write_cache(fd, active_cache, active_nr) || - commit_locked_index(lock_file)) - die(_("unable to write new index file")); - return 0; -} - static void split_merge_strategies(const char *string, struct strategy **list, int *nr, int *alloc) { @@ -874,39 +802,49 @@ static void read_merge_msg(struct strbuf *msg) die_errno(_("Could not read from '%s'"), filename); } -static void write_merge_state(void); -static void abort_commit(const char *err_msg) +static void write_merge_state(struct commit_list *); +static void abort_commit(struct commit_list *remoteheads, const char *err_msg) { if (err_msg) error("%s", err_msg); fprintf(stderr, _("Not committing merge; use 'git commit' to complete the merge.\n")); - write_merge_state(); + write_merge_state(remoteheads); exit(1); } -static void prepare_to_commit(void) +static const char merge_editor_comment[] = +N_("Please enter a commit message to explain why this merge is necessary,\n" + "especially if it merges an updated upstream into a topic branch.\n" + "\n" + "Lines starting with '%c' will be ignored, and an empty message aborts\n" + "the commit.\n"); + +static void prepare_to_commit(struct commit_list *remoteheads) { struct strbuf msg = STRBUF_INIT; strbuf_addbuf(&msg, &merge_msg); strbuf_addch(&msg, '\n'); + if (0 < option_edit) + strbuf_commented_addf(&msg, _(merge_editor_comment), comment_line_char); write_merge_msg(&msg); - run_hook(get_index_file(), "prepare-commit-msg", - git_path("MERGE_MSG"), "merge", NULL, NULL); - if (option_edit) { + if (run_hook(get_index_file(), "prepare-commit-msg", + git_path("MERGE_MSG"), "merge", NULL, NULL)) + abort_commit(remoteheads, NULL); + if (0 < option_edit) { if (launch_editor(git_path("MERGE_MSG"), NULL, NULL)) - abort_commit(NULL); + abort_commit(remoteheads, NULL); } read_merge_msg(&msg); - stripspace(&msg, option_edit); + stripspace(&msg, 0 < option_edit); if (!msg.len) - abort_commit(_("Empty commit message.")); + abort_commit(remoteheads, _("Empty commit message.")); strbuf_release(&merge_msg); strbuf_addbuf(&merge_msg, &msg); strbuf_release(&msg); } -static int merge_trivial(struct commit *head) +static int merge_trivial(struct commit *head, struct commit_list *remoteheads) { unsigned char result_tree[20], result_commit[20]; struct commit_list *parent = xmalloc(sizeof(*parent)); @@ -917,45 +855,37 @@ static int merge_trivial(struct commit *head) parent->next = xmalloc(sizeof(*parent->next)); parent->next->item = remoteheads->item; parent->next->next = NULL; - prepare_to_commit(); + prepare_to_commit(remoteheads); if (commit_tree(&merge_msg, result_tree, parent, result_commit, NULL, sign_commit)) die(_("failed to write commit object")); - finish(head, result_commit, "In-index merge"); + finish(head, remoteheads, result_commit, "In-index merge"); drop_save(); return 0; } static int finish_automerge(struct commit *head, + int head_subsumed, struct commit_list *common, + struct commit_list *remoteheads, unsigned char *result_tree, const char *wt_strategy) { - struct commit_list *parents = NULL, *j; + struct commit_list *parents = NULL; struct strbuf buf = STRBUF_INIT; unsigned char result_commit[20]; free_commit_list(common); - if (allow_fast_forward) { - parents = remoteheads; + parents = remoteheads; + if (!head_subsumed || fast_forward == FF_NO) commit_list_insert(head, &parents); - parents = reduce_heads(parents); - } else { - struct commit_list **pptr = &parents; - - pptr = &commit_list_insert(head, - pptr)->next; - for (j = remoteheads; j; j = j->next) - pptr = &commit_list_insert(j->item, pptr)->next; - } strbuf_addch(&merge_msg, '\n'); - prepare_to_commit(); - free_commit_list(remoteheads); + prepare_to_commit(remoteheads); if (commit_tree(&merge_msg, result_tree, parents, result_commit, NULL, sign_commit)) die(_("failed to write commit object")); strbuf_addf(&buf, "Merge made by the '%s' strategy.", wt_strategy); - finish(head, result_commit, buf.buf); + finish(head, remoteheads, result_commit, buf.buf); strbuf_release(&buf); drop_save(); return 0; @@ -973,7 +903,7 @@ static int suggest_conflicts(int renormalizing) die_errno(_("Could not open '%s' for writing"), filename); fprintf(fp, "\nConflicts:\n"); for (pos = 0; pos < active_nr; pos++) { - struct cache_entry *ce = active_cache[pos]; + const struct cache_entry *ce = active_cache[pos]; if (ce_stage(ce)) { fprintf(fp, "\t%s\n", ce->name); @@ -1032,7 +962,7 @@ static int evaluate_result(void) } /* - * Pretend as if the user told us to merge with the tracking + * Pretend as if the user told us to merge with the remote-tracking * branch we have for the upstream of the current branch */ static int setup_with_upstream(const char ***argv) @@ -1051,7 +981,7 @@ static int setup_with_upstream(const char ***argv) args = xcalloc(branch->merge_nr + 1, sizeof(char *)); for (i = 0; i < branch->merge_nr; i++) { if (!branch->merge[i]->dst) - die(_("No remote tracking branch for %s from %s"), + die(_("No remote-tracking branch for %s from %s"), branch->merge[i]->src, branch->remote_name); args[i] = branch->merge[i]->dst; } @@ -1060,7 +990,7 @@ static int setup_with_upstream(const char ***argv) return i; } -static void write_merge_state(void) +static void write_merge_state(struct commit_list *remoteheads) { const char *filename; int fd; @@ -1092,13 +1022,74 @@ static void write_merge_state(void) if (fd < 0) die_errno(_("Could not open '%s' for writing"), filename); strbuf_reset(&buf); - if (!allow_fast_forward) + if (fast_forward == FF_NO) strbuf_addf(&buf, "no-ff"); if (write_in_full(fd, buf.buf, buf.len) != buf.len) die_errno(_("Could not write to '%s'"), filename); close(fd); } +static int default_edit_option(void) +{ + static const char name[] = "GIT_MERGE_AUTOEDIT"; + const char *e = getenv(name); + struct stat st_stdin, st_stdout; + + if (have_message) + /* an explicit -m msg without --[no-]edit */ + return 0; + + if (e) { + int v = git_config_maybe_bool(name, e); + if (v < 0) + die("Bad value '%s' in environment '%s'", e, name); + return v; + } + + /* Use editor if stdin and stdout are the same and is a tty */ + return (!fstat(0, &st_stdin) && + !fstat(1, &st_stdout) && + isatty(0) && isatty(1) && + st_stdin.st_dev == st_stdout.st_dev && + st_stdin.st_ino == st_stdout.st_ino && + st_stdin.st_mode == st_stdout.st_mode); +} + +static struct commit_list *collect_parents(struct commit *head_commit, + int *head_subsumed, + int argc, const char **argv) +{ + int i; + struct commit_list *remoteheads = NULL, *parents, *next; + struct commit_list **remotes = &remoteheads; + + if (head_commit) + remotes = &commit_list_insert(head_commit, remotes)->next; + for (i = 0; i < argc; i++) { + struct commit *commit = get_merge_parent(argv[i]); + if (!commit) + help_unknown_ref(argv[i], "merge", + "not something we can merge"); + remotes = &commit_list_insert(commit, remotes)->next; + } + *remotes = NULL; + + parents = reduce_heads(remoteheads); + + *head_subsumed = 1; /* we will flip this to 0 when we find it */ + for (remoteheads = NULL, remotes = &remoteheads; + parents; + parents = next) { + struct commit *commit = parents->item; + next = parents->next; + if (commit == head_commit) + *head_subsumed = 0; + else + remotes = &commit_list_insert(commit, remotes)->next; + } + return remoteheads; +} + int cmd_merge(int argc, const char **argv, const char *prefix) { unsigned char result_tree[20]; @@ -1107,11 +1098,11 @@ int cmd_merge(int argc, const char **argv, const char *prefix) struct commit *head_commit; struct strbuf buf = STRBUF_INIT; const char *head_arg; - int flag, i, ret = 0; + int flag, i, ret = 0, head_subsumed; int best_cnt = -1, merge_was_ok = 0, automerge_was_ok = 0; struct commit_list *common = NULL; const char *best_strategy = NULL, *wt_strategy = NULL; - struct commit_list **remotes = &remoteheads; + struct commit_list *remoteheads, *p; void *branch_to_free; if (argc == 2 && !strcmp(argv[1], "-h")) @@ -1180,14 +1171,11 @@ int cmd_merge(int argc, const char **argv, const char *prefix) show_diffstat = 0; if (squash) { - if (!allow_fast_forward) + if (fast_forward == FF_NO) die(_("You cannot combine --squash with --no-ff.")); option_commit = 0; } - if (!allow_fast_forward && fast_forward_only) - die(_("You cannot combine --no-ff with --ff-only.")); - if (!abort_current_merge) { if (!argc) { if (default_to_upstream) @@ -1216,6 +1204,7 @@ int cmd_merge(int argc, const char **argv, const char *prefix) head_arg = argv[1]; argv += 2; argc -= 2; + remoteheads = collect_parents(head_commit, &head_subsumed, argc, argv); } else if (!head_commit) { struct commit *remote_head; /* @@ -1228,10 +1217,11 @@ int cmd_merge(int argc, const char **argv, const char *prefix) "empty head")); if (squash) die(_("Squash commit into empty head not supported yet")); - if (!allow_fast_forward) + if (fast_forward == FF_NO) die(_("Non-fast-forward commit does not make sense into " "an empty head")); - remote_head = get_merge_parent(argv[0]); + remoteheads = collect_parents(head_commit, &head_subsumed, argc, argv); + remote_head = remoteheads->item; if (!remote_head) die(_("%s - not something we can merge"), argv[0]); read_empty(remote_head->object.sha1, 0); @@ -1249,14 +1239,16 @@ int cmd_merge(int argc, const char **argv, const char *prefix) * the standard merge summary message to be appended * to the given message. */ - for (i = 0; i < argc; i++) - merge_name(argv[i], &merge_names); + remoteheads = collect_parents(head_commit, &head_subsumed, argc, argv); + for (p = remoteheads; p; p = p->next) + merge_name(merge_remote_util(p->item)->name, &merge_names); if (!have_message || shortlog_len) { struct fmt_merge_msg_opts opts; memset(&opts, 0, sizeof(opts)); opts.add_title = !have_message; opts.shortlog_len = shortlog_len; + opts.credit_people = (0 < option_edit); fmt_merge_msg(&merge_names, &merge_msg, &opts); if (merge_msg.len) @@ -1268,31 +1260,65 @@ int cmd_merge(int argc, const char **argv, const char *prefix) usage_with_options(builtin_merge_usage, builtin_merge_options); + if (verify_signatures) { + for (p = remoteheads; p; p = p->next) { + struct commit *commit = p->item; + char hex[41]; + struct signature_check signature_check; + memset(&signature_check, 0, sizeof(signature_check)); + + check_commit_signature(commit, &signature_check); + + strcpy(hex, find_unique_abbrev(commit->object.sha1, DEFAULT_ABBREV)); + switch (signature_check.result) { + case 'G': + break; + case 'U': + die(_("Commit %s has an untrusted GPG signature, " + "allegedly by %s."), hex, signature_check.signer); + case 'B': + die(_("Commit %s has a bad GPG signature " + "allegedly by %s."), hex, signature_check.signer); + default: /* 'N' */ + die(_("Commit %s does not have a GPG signature."), hex); + } + if (verbosity >= 0 && signature_check.result == 'G') + printf(_("Commit %s has a good GPG signature by %s\n"), + hex, signature_check.signer); + + free(signature_check.gpg_output); + free(signature_check.gpg_status); + free(signature_check.signer); + free(signature_check.key); + } + } + strbuf_addstr(&buf, "merge"); - for (i = 0; i < argc; i++) - strbuf_addf(&buf, " %s", argv[i]); + for (p = remoteheads; p; p = p->next) + strbuf_addf(&buf, " %s", merge_remote_util(p->item)->name); setenv("GIT_REFLOG_ACTION", buf.buf, 0); strbuf_reset(&buf); - for (i = 0; i < argc; i++) { - struct commit *commit = get_merge_parent(argv[i]); - if (!commit) - die(_("%s - not something we can merge"), argv[i]); - remotes = &commit_list_insert(commit, remotes)->next; + for (p = remoteheads; p; p = p->next) { + struct commit *commit = p->item; strbuf_addf(&buf, "GITHEAD_%s", sha1_to_hex(commit->object.sha1)); - setenv(buf.buf, argv[i], 1); + setenv(buf.buf, merge_remote_util(commit)->name, 1); strbuf_reset(&buf); - if (merge_remote_util(commit) && + if (fast_forward != FF_ONLY && + merge_remote_util(commit) && merge_remote_util(commit)->obj && - merge_remote_util(commit)->obj->type == OBJ_TAG) { - option_edit = 1; - allow_fast_forward = 0; - } + merge_remote_util(commit)->obj->type == OBJ_TAG) + fast_forward = FF_NO; } + if (option_edit < 0) + option_edit = default_edit_option(); + if (!use_strategies) { - if (!remoteheads->next) + if (!remoteheads) + ; /* already up-to-date */ + else if (!remoteheads->next) add_strategies(pull_twohead, DEFAULT_TWOHEAD); else add_strategies(pull_octopus, DEFAULT_OCTOPUS); @@ -1300,12 +1326,14 @@ int cmd_merge(int argc, const char **argv, const char *prefix) for (i = 0; i < use_strategies_nr; i++) { if (use_strategies[i]->attr & NO_FAST_FORWARD) - allow_fast_forward = 0; + fast_forward = FF_NO; if (use_strategies[i]->attr & NO_TRIVIAL) allow_trivial = 0; } - if (!remoteheads->next) + if (!remoteheads) + ; /* already up-to-date */ + else if (!remoteheads->next) common = get_merge_bases(head_commit, remoteheads->item, 1); else { struct commit_list *list = remoteheads; @@ -1317,17 +1345,18 @@ int cmd_merge(int argc, const char **argv, const char *prefix) update_ref("updating ORIG_HEAD", "ORIG_HEAD", head_commit->object.sha1, NULL, 0, DIE_ON_ERR); - if (!common) + if (remoteheads && !common) ; /* No common ancestors found. We need a real merge. */ - else if (!remoteheads->next && !common->next && - common->item == remoteheads->item) { + else if (!remoteheads || + (!remoteheads->next && !common->next && + common->item == remoteheads->item)) { /* * 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."); goto done; - } else if (allow_fast_forward && !remoteheads->next && + } else if (fast_forward != FF_NO && !remoteheads->next && !common->next && !hashcmp(common->item->object.sha1, head_commit->object.sha1)) { /* Again the most common case of merging one remote. */ @@ -1353,12 +1382,13 @@ int cmd_merge(int argc, const char **argv, const char *prefix) } if (checkout_fast_forward(head_commit->object.sha1, - commit->object.sha1)) { + commit->object.sha1, + overwrite_ignore)) { ret = 1; goto done; } - finish(head_commit, commit->object.sha1, msg.buf); + finish(head_commit, remoteheads, commit->object.sha1, msg.buf); drop_save(); goto done; } else if (!remoteheads->next && common->next) @@ -1373,14 +1403,14 @@ int cmd_merge(int argc, const char **argv, const char *prefix) * only one common. */ refresh_cache(REFRESH_QUIET); - if (allow_trivial && !fast_forward_only) { + if (allow_trivial && fast_forward != FF_ONLY) { /* See if it is really trivial. */ - git_committer_info(IDENT_ERROR_ON_NO_NAME); + git_committer_info(IDENT_STRICT); printf(_("Trying really trivial in-index merge...\n")); if (!read_tree_trivial(common->item->object.sha1, head_commit->object.sha1, remoteheads->item->object.sha1)) { - ret = merge_trivial(head_commit); + ret = merge_trivial(head_commit, remoteheads); goto done; } printf(_("Nope.\n")); @@ -1414,11 +1444,11 @@ int cmd_merge(int argc, const char **argv, const char *prefix) } } - if (fast_forward_only) + if (fast_forward == FF_ONLY) die(_("Not possible to fast-forward, aborting.")); /* We are going to make a new commit. */ - git_committer_info(IDENT_ERROR_ON_NO_NAME); + git_committer_info(IDENT_STRICT); /* * At this point, we need a real merge. No matter what strategy @@ -1451,7 +1481,8 @@ int cmd_merge(int argc, const char **argv, const char *prefix) wt_strategy = use_strategies[i]->name; ret = try_merge_strategy(use_strategies[i]->name, - common, head_commit, head_arg); + common, remoteheads, + head_commit, head_arg); if (!option_commit && !ret) { merge_was_ok = 1; /* @@ -1493,8 +1524,9 @@ int cmd_merge(int argc, const char **argv, const char *prefix) * auto resolved the merge cleanly. */ if (automerge_was_ok) { - ret = finish_automerge(head_commit, common, result_tree, - wt_strategy); + ret = finish_automerge(head_commit, head_subsumed, + common, remoteheads, + result_tree, wt_strategy); goto done; } @@ -1519,13 +1551,14 @@ int cmd_merge(int argc, const char **argv, const char *prefix) restore_state(head_commit->object.sha1, stash); printf(_("Using the %s to prepare resolving by hand.\n"), best_strategy); - try_merge_strategy(best_strategy, common, head_commit, head_arg); + try_merge_strategy(best_strategy, common, remoteheads, + head_commit, head_arg); } if (squash) - finish(head_commit, NULL, NULL); + finish(head_commit, remoteheads, NULL, NULL); else - write_merge_state(); + write_merge_state(remoteheads); if (merge_was_ok) fprintf(stderr, _("Automatic merge went well; " |