diff options
Diffstat (limited to 'builtin/branch.c')
| -rw-r--r-- | builtin/branch.c | 712 |
1 files changed, 712 insertions, 0 deletions
diff --git a/builtin/branch.c b/builtin/branch.c new file mode 100644 index 0000000000..87976f0921 --- /dev/null +++ b/builtin/branch.c @@ -0,0 +1,712 @@ +/* + * Builtin "git branch" + * + * Copyright (c) 2006 Kristian Høgsberg <krh@redhat.com> + * Based on git-branch.sh by Junio C Hamano. + */ + +#include "cache.h" +#include "color.h" +#include "refs.h" +#include "commit.h" +#include "builtin.h" +#include "remote.h" +#include "parse-options.h" +#include "branch.h" +#include "diff.h" +#include "revision.h" + +static const char * const builtin_branch_usage[] = { + "git branch [options] [-r | -a] [--merged | --no-merged]", + "git branch [options] [-l] [-f] <branchname> [<start-point>]", + "git branch [options] [-r] (-d | -D) <branchname>", + "git branch [options] (-m | -M) [<oldbranch>] <newbranch>", + NULL +}; + +#define REF_LOCAL_BRANCH 0x01 +#define REF_REMOTE_BRANCH 0x02 + +static const char *head; +static unsigned char head_sha1[20]; + +static int branch_use_color = -1; +static char branch_colors[][COLOR_MAXLEN] = { + GIT_COLOR_RESET, + GIT_COLOR_NORMAL, /* PLAIN */ + GIT_COLOR_RED, /* REMOTE */ + GIT_COLOR_NORMAL, /* LOCAL */ + GIT_COLOR_GREEN, /* CURRENT */ +}; +enum color_branch { + BRANCH_COLOR_RESET = 0, + BRANCH_COLOR_PLAIN = 1, + BRANCH_COLOR_REMOTE = 2, + BRANCH_COLOR_LOCAL = 3, + BRANCH_COLOR_CURRENT = 4 +}; + +static enum merge_filter { + NO_FILTER = 0, + SHOW_NOT_MERGED, + SHOW_MERGED +} merge_filter; +static unsigned char merge_filter_ref[20]; + +static int parse_branch_color_slot(const char *var, int ofs) +{ + if (!strcasecmp(var+ofs, "plain")) + return BRANCH_COLOR_PLAIN; + if (!strcasecmp(var+ofs, "reset")) + return BRANCH_COLOR_RESET; + if (!strcasecmp(var+ofs, "remote")) + return BRANCH_COLOR_REMOTE; + if (!strcasecmp(var+ofs, "local")) + return BRANCH_COLOR_LOCAL; + if (!strcasecmp(var+ofs, "current")) + return BRANCH_COLOR_CURRENT; + return -1; +} + +static int git_branch_config(const char *var, const char *value, void *cb) +{ + if (!strcmp(var, "color.branch")) { + branch_use_color = git_config_colorbool(var, value, -1); + return 0; + } + if (!prefixcmp(var, "color.branch.")) { + int slot = parse_branch_color_slot(var, 13); + if (slot < 0) + return 0; + if (!value) + return config_error_nonbool(var); + color_parse(value, var, branch_colors[slot]); + return 0; + } + return git_color_default_config(var, value, cb); +} + +static const char *branch_get_color(enum color_branch ix) +{ + if (branch_use_color > 0) + return branch_colors[ix]; + return ""; +} + +static int branch_merged(int kind, const char *name, + struct commit *rev, struct commit *head_rev) +{ + /* + * This checks whether the merge bases of branch and HEAD (or + * the other branch this branch builds upon) contains the + * branch, which means that the branch has already been merged + * safely to HEAD (or the other branch). + */ + struct commit *reference_rev = NULL; + const char *reference_name = NULL; + int merged; + + if (kind == REF_LOCAL_BRANCH) { + struct branch *branch = branch_get(name); + unsigned char sha1[20]; + + if (branch && + branch->merge && + branch->merge[0] && + branch->merge[0]->dst && + (reference_name = + resolve_ref(branch->merge[0]->dst, sha1, 1, NULL)) != NULL) + reference_rev = lookup_commit_reference(sha1); + } + if (!reference_rev) + reference_rev = head_rev; + + merged = in_merge_bases(rev, &reference_rev, 1); + + /* + * After the safety valve is fully redefined to "check with + * upstream, if any, otherwise with HEAD", we should just + * return the result of the in_merge_bases() above without + * any of the following code, but during the transition period, + * a gentle reminder is in order. + */ + if ((head_rev != reference_rev) && + in_merge_bases(rev, &head_rev, 1) != merged) { + if (merged) + warning("deleting branch '%s' that has been merged to\n" + " '%s', but it is not yet merged to HEAD.", + name, reference_name); + else + warning("not deleting branch '%s' that is not yet merged to\n" + " '%s', even though it is merged to HEAD.", + name, reference_name); + } + return merged; +} + +static int delete_branches(int argc, const char **argv, int force, int kinds) +{ + struct commit *rev, *head_rev = NULL; + unsigned char sha1[20]; + char *name = NULL; + const char *fmt, *remote; + int i; + int ret = 0; + struct strbuf bname = STRBUF_INIT; + + switch (kinds) { + case REF_REMOTE_BRANCH: + fmt = "refs/remotes/%s"; + remote = "remote "; + force = 1; + break; + case REF_LOCAL_BRANCH: + fmt = "refs/heads/%s"; + remote = ""; + break; + default: + die("cannot use -a with -d"); + } + + if (!force) { + head_rev = lookup_commit_reference(head_sha1); + if (!head_rev) + die("Couldn't look up commit object for HEAD"); + } + for (i = 0; i < argc; i++, strbuf_release(&bname)) { + strbuf_branchname(&bname, argv[i]); + if (kinds == REF_LOCAL_BRANCH && !strcmp(head, bname.buf)) { + error("Cannot delete the branch '%s' " + "which you are currently on.", bname.buf); + ret = 1; + continue; + } + + free(name); + + name = xstrdup(mkpath(fmt, bname.buf)); + if (!resolve_ref(name, sha1, 1, NULL)) { + error("%sbranch '%s' not found.", + remote, bname.buf); + ret = 1; + continue; + } + + rev = lookup_commit_reference(sha1); + if (!rev) { + error("Couldn't look up commit object for '%s'", name); + ret = 1; + continue; + } + + if (!force && !branch_merged(kinds, bname.buf, rev, head_rev)) { + error("The branch '%s' is not fully merged.\n" + "If you are sure you want to delete it, " + "run 'git branch -D %s'.", bname.buf, bname.buf); + ret = 1; + continue; + } + + if (delete_ref(name, sha1, 0)) { + error("Error deleting %sbranch '%s'", remote, + bname.buf); + ret = 1; + } else { + struct strbuf buf = STRBUF_INIT; + printf("Deleted %sbranch %s (was %s).\n", remote, + bname.buf, + find_unique_abbrev(sha1, DEFAULT_ABBREV)); + strbuf_addf(&buf, "branch.%s", bname.buf); + if (git_config_rename_section(buf.buf, NULL) < 0) + warning("Update of config-file failed"); + strbuf_release(&buf); + } + } + + free(name); + + return(ret); +} + +struct ref_item { + char *name; + char *dest; + unsigned int kind, len; + struct commit *commit; +}; + +struct ref_list { + struct rev_info revs; + int index, alloc, maxwidth, verbose, abbrev; + struct ref_item *list; + struct commit_list *with_commit; + int kinds; +}; + +static char *resolve_symref(const char *src, const char *prefix) +{ + unsigned char sha1[20]; + int flag; + const char *dst, *cp; + + dst = resolve_ref(src, sha1, 0, &flag); + if (!(dst && (flag & REF_ISSYMREF))) + return NULL; + if (prefix && (cp = skip_prefix(dst, prefix))) + dst = cp; + return xstrdup(dst); +} + +struct append_ref_cb { + struct ref_list *ref_list; + int ret; +}; + +static int append_ref(const char *refname, const unsigned char *sha1, int flags, void *cb_data) +{ + struct append_ref_cb *cb = (struct append_ref_cb *)(cb_data); + struct ref_list *ref_list = cb->ref_list; + struct ref_item *newitem; + struct commit *commit; + int kind, i; + const char *prefix, *orig_refname = refname; + + static struct { + int kind; + const char *prefix; + int pfxlen; + } ref_kind[] = { + { REF_LOCAL_BRANCH, "refs/heads/", 11 }, + { REF_REMOTE_BRANCH, "refs/remotes/", 13 }, + }; + + /* Detect kind */ + for (i = 0; i < ARRAY_SIZE(ref_kind); i++) { + prefix = ref_kind[i].prefix; + if (strncmp(refname, prefix, ref_kind[i].pfxlen)) + continue; + kind = ref_kind[i].kind; + refname += ref_kind[i].pfxlen; + break; + } + if (ARRAY_SIZE(ref_kind) <= i) + return 0; + + /* Don't add types the caller doesn't want */ + if ((kind & ref_list->kinds) == 0) + return 0; + + commit = NULL; + if (ref_list->verbose || ref_list->with_commit || merge_filter != NO_FILTER) { + commit = lookup_commit_reference_gently(sha1, 1); + if (!commit) { + cb->ret = error("branch '%s' does not point at a commit", refname); + return 0; + } + + /* Filter with with_commit if specified */ + if (!is_descendant_of(commit, ref_list->with_commit)) + return 0; + + if (merge_filter != NO_FILTER) + add_pending_object(&ref_list->revs, + (struct object *)commit, refname); + } + + /* Resize buffer */ + if (ref_list->index >= ref_list->alloc) { + ref_list->alloc = alloc_nr(ref_list->alloc); + ref_list->list = xrealloc(ref_list->list, + ref_list->alloc * sizeof(struct ref_item)); + } + + /* Record the new item */ + newitem = &(ref_list->list[ref_list->index++]); + newitem->name = xstrdup(refname); + newitem->kind = kind; + newitem->commit = commit; + newitem->len = strlen(refname); + newitem->dest = resolve_symref(orig_refname, prefix); + /* adjust for "remotes/" */ + if (newitem->kind == REF_REMOTE_BRANCH && + ref_list->kinds != REF_REMOTE_BRANCH) + newitem->len += 8; + if (newitem->len > ref_list->maxwidth) + ref_list->maxwidth = newitem->len; + + return 0; +} + +static void free_ref_list(struct ref_list *ref_list) +{ + int i; + + for (i = 0; i < ref_list->index; i++) { + free(ref_list->list[i].name); + free(ref_list->list[i].dest); + } + free(ref_list->list); +} + +static int ref_cmp(const void *r1, const void *r2) +{ + struct ref_item *c1 = (struct ref_item *)(r1); + struct ref_item *c2 = (struct ref_item *)(r2); + + if (c1->kind != c2->kind) + return c1->kind - c2->kind; + return strcmp(c1->name, c2->name); +} + +static void fill_tracking_info(struct strbuf *stat, const char *branch_name, + int show_upstream_ref) +{ + int ours, theirs; + struct branch *branch = branch_get(branch_name); + + if (!stat_tracking_info(branch, &ours, &theirs)) { + if (branch && branch->merge && branch->merge[0]->dst && + show_upstream_ref) + strbuf_addf(stat, "[%s] ", + shorten_unambiguous_ref(branch->merge[0]->dst, 0)); + return; + } + + strbuf_addch(stat, '['); + if (show_upstream_ref) + strbuf_addf(stat, "%s: ", + shorten_unambiguous_ref(branch->merge[0]->dst, 0)); + if (!ours) + strbuf_addf(stat, "behind %d] ", theirs); + else if (!theirs) + strbuf_addf(stat, "ahead %d] ", ours); + else + strbuf_addf(stat, "ahead %d, behind %d] ", ours, theirs); +} + +static int matches_merge_filter(struct commit *commit) +{ + int is_merged; + + if (merge_filter == NO_FILTER) + return 1; + + is_merged = !!(commit->object.flags & UNINTERESTING); + return (is_merged == (merge_filter == SHOW_MERGED)); +} + +static void print_ref_item(struct ref_item *item, int maxwidth, int verbose, + int abbrev, int current, char *prefix) +{ + char c; + int color; + struct commit *commit = item->commit; + struct strbuf out = STRBUF_INIT, name = STRBUF_INIT; + + if (!matches_merge_filter(commit)) + return; + + switch (item->kind) { + case REF_LOCAL_BRANCH: + color = BRANCH_COLOR_LOCAL; + break; + case REF_REMOTE_BRANCH: + color = BRANCH_COLOR_REMOTE; + break; + default: + color = BRANCH_COLOR_PLAIN; + break; + } + + c = ' '; + if (current) { + c = '*'; + color = BRANCH_COLOR_CURRENT; + } + + strbuf_addf(&name, "%s%s", prefix, item->name); + if (verbose) + strbuf_addf(&out, "%c %s%-*s%s", c, branch_get_color(color), + maxwidth, name.buf, + branch_get_color(BRANCH_COLOR_RESET)); + else + strbuf_addf(&out, "%c %s%s%s", c, branch_get_color(color), + name.buf, branch_get_color(BRANCH_COLOR_RESET)); + + if (item->dest) + strbuf_addf(&out, " -> %s", item->dest); + else if (verbose) { + struct strbuf subject = STRBUF_INIT, stat = STRBUF_INIT; + const char *sub = " **** invalid ref ****"; + + commit = item->commit; + if (commit && !parse_commit(commit)) { + struct pretty_print_context ctx = {0}; + pretty_print_commit(CMIT_FMT_ONELINE, commit, + &subject, &ctx); + sub = subject.buf; + } + + if (item->kind == REF_LOCAL_BRANCH) + fill_tracking_info(&stat, item->name, verbose > 1); + + strbuf_addf(&out, " %s %s%s", + find_unique_abbrev(item->commit->object.sha1, abbrev), + stat.buf, sub); + strbuf_release(&stat); + strbuf_release(&subject); + } + printf("%s\n", out.buf); + strbuf_release(&name); + strbuf_release(&out); +} + +static int calc_maxwidth(struct ref_list *refs) +{ + int i, w = 0; + for (i = 0; i < refs->index; i++) { + if (!matches_merge_filter(refs->list[i].commit)) + continue; + if (refs->list[i].len > w) + w = refs->list[i].len; + } + return w; +} + + +static void show_detached(struct ref_list *ref_list) +{ + struct commit *head_commit = lookup_commit_reference_gently(head_sha1, 1); + + if (head_commit && is_descendant_of(head_commit, ref_list->with_commit)) { + struct ref_item item; + item.name = xstrdup("(no branch)"); + item.len = strlen(item.name); + item.kind = REF_LOCAL_BRANCH; + item.dest = NULL; + item.commit = head_commit; + if (item.len > ref_list->maxwidth) + ref_list->maxwidth = item.len; + print_ref_item(&item, ref_list->maxwidth, ref_list->verbose, ref_list->abbrev, 1, ""); + free(item.name); + } +} + +static int print_ref_list(int kinds, int detached, int verbose, int abbrev, struct commit_list *with_commit) +{ + int i; + struct append_ref_cb cb; + struct ref_list ref_list; + + memset(&ref_list, 0, sizeof(ref_list)); + ref_list.kinds = kinds; + ref_list.verbose = verbose; + ref_list.abbrev = abbrev; + ref_list.with_commit = with_commit; + if (merge_filter != NO_FILTER) + init_revisions(&ref_list.revs, NULL); + cb.ref_list = &ref_list; + cb.ret = 0; + for_each_rawref(append_ref, &cb); + if (merge_filter != NO_FILTER) { + struct commit *filter; + filter = lookup_commit_reference_gently(merge_filter_ref, 0); + filter->object.flags |= UNINTERESTING; + add_pending_object(&ref_list.revs, + (struct object *) filter, ""); + ref_list.revs.limited = 1; + prepare_revision_walk(&ref_list.revs); + if (verbose) + ref_list.maxwidth = calc_maxwidth(&ref_list); + } + + qsort(ref_list.list, ref_list.index, sizeof(struct ref_item), ref_cmp); + + detached = (detached && (kinds & REF_LOCAL_BRANCH)); + if (detached) + show_detached(&ref_list); + + for (i = 0; i < ref_list.index; i++) { + int current = !detached && + (ref_list.list[i].kind == REF_LOCAL_BRANCH) && + !strcmp(ref_list.list[i].name, head); + char *prefix = (kinds != REF_REMOTE_BRANCH && + ref_list.list[i].kind == REF_REMOTE_BRANCH) + ? "remotes/" : ""; + print_ref_item(&ref_list.list[i], ref_list.maxwidth, verbose, + abbrev, current, prefix); + } + + free_ref_list(&ref_list); + + if (cb.ret) + error("some refs could not be read"); + + return cb.ret; +} + +static void rename_branch(const char *oldname, const char *newname, int force) +{ + struct strbuf oldref = STRBUF_INIT, newref = STRBUF_INIT, logmsg = STRBUF_INIT; + unsigned char sha1[20]; + struct strbuf oldsection = STRBUF_INIT, newsection = STRBUF_INIT; + int recovery = 0; + + if (!oldname) + die("cannot rename the current branch while not on any."); + + if (strbuf_check_branch_ref(&oldref, oldname)) { + /* + * Bad name --- this could be an attempt to rename a + * ref that we used to allow to be created by accident. + */ + if (resolve_ref(oldref.buf, sha1, 1, NULL)) + recovery = 1; + else + die("Invalid branch name: '%s'", oldname); + } + + if (strbuf_check_branch_ref(&newref, newname)) + die("Invalid branch name: '%s'", newname); + + if (resolve_ref(newref.buf, sha1, 1, NULL) && !force) + die("A branch named '%s' already exists.", newref.buf + 11); + + strbuf_addf(&logmsg, "Branch: renamed %s to %s", + oldref.buf, newref.buf); + + if (rename_ref(oldref.buf, newref.buf, logmsg.buf)) + die("Branch rename failed"); + strbuf_release(&logmsg); + + if (recovery) + warning("Renamed a misnamed branch '%s' away", oldref.buf + 11); + + /* no need to pass logmsg here as HEAD didn't really move */ + if (!strcmp(oldname, head) && create_symref("HEAD", newref.buf, NULL)) + die("Branch renamed to %s, but HEAD is not updated!", newname); + + strbuf_addf(&oldsection, "branch.%s", oldref.buf + 11); + strbuf_release(&oldref); + strbuf_addf(&newsection, "branch.%s", newref.buf + 11); + strbuf_release(&newref); + if (git_config_rename_section(oldsection.buf, newsection.buf) < 0) + die("Branch is renamed, but update of config-file failed"); + strbuf_release(&oldsection); + strbuf_release(&newsection); +} + +static int opt_parse_merge_filter(const struct option *opt, const char *arg, int unset) +{ + merge_filter = ((opt->long_name[0] == 'n') + ? SHOW_NOT_MERGED + : SHOW_MERGED); + if (unset) + merge_filter = SHOW_NOT_MERGED; /* b/c for --no-merged */ + if (!arg) + arg = "HEAD"; + if (get_sha1(arg, merge_filter_ref)) + die("malformed object name %s", arg); + return 0; +} + +int cmd_branch(int argc, const char **argv, const char *prefix) +{ + int delete = 0, rename = 0, force_create = 0; + int verbose = 0, abbrev = DEFAULT_ABBREV, detached = 0; + int reflog = 0; + enum branch_track track; + int kinds = REF_LOCAL_BRANCH; + struct commit_list *with_commit = NULL; + + struct option options[] = { + OPT_GROUP("Generic options"), + OPT__VERBOSE(&verbose), + OPT_SET_INT('t', "track", &track, "set up tracking mode (see git-pull(1))", + BRANCH_TRACK_EXPLICIT), + OPT_SET_INT( 0, "set-upstream", &track, "change upstream info", + BRANCH_TRACK_OVERRIDE), + OPT__COLOR(&branch_use_color, "use colored output"), + OPT_SET_INT('r', NULL, &kinds, "act on remote-tracking branches", + REF_REMOTE_BRANCH), + { + OPTION_CALLBACK, 0, "contains", &with_commit, "commit", + "print only branches that contain the commit", + PARSE_OPT_LASTARG_DEFAULT, + parse_opt_with_commit, (intptr_t)"HEAD", + }, + { + OPTION_CALLBACK, 0, "with", &with_commit, "commit", + "print only branches that contain the commit", + PARSE_OPT_HIDDEN | PARSE_OPT_LASTARG_DEFAULT, + parse_opt_with_commit, (intptr_t) "HEAD", + }, + OPT__ABBREV(&abbrev), + + OPT_GROUP("Specific git-branch actions:"), + OPT_SET_INT('a', NULL, &kinds, "list both remote-tracking and local branches", + REF_REMOTE_BRANCH | REF_LOCAL_BRANCH), + OPT_BIT('d', NULL, &delete, "delete fully merged branch", 1), + OPT_BIT('D', NULL, &delete, "delete branch (even if not merged)", 2), + OPT_BIT('m', NULL, &rename, "move/rename a branch and its reflog", 1), + OPT_BIT('M', NULL, &rename, "move/rename a branch, even if target exists", 2), + OPT_BOOLEAN('l', NULL, &reflog, "create the branch's reflog"), + OPT_BOOLEAN('f', "force", &force_create, "force creation (when already exists)"), + { + OPTION_CALLBACK, 0, "no-merged", &merge_filter_ref, + "commit", "print only not merged branches", + PARSE_OPT_LASTARG_DEFAULT | PARSE_OPT_NONEG, + opt_parse_merge_filter, (intptr_t) "HEAD", + }, + { + OPTION_CALLBACK, 0, "merged", &merge_filter_ref, + "commit", "print only merged branches", + PARSE_OPT_LASTARG_DEFAULT | PARSE_OPT_NONEG, + opt_parse_merge_filter, (intptr_t) "HEAD", + }, + OPT_END(), + }; + + git_config(git_branch_config, NULL); + + if (branch_use_color == -1) + branch_use_color = git_use_color_default; + + track = git_branch_track; + + head = resolve_ref("HEAD", head_sha1, 0, NULL); + if (!head) + die("Failed to resolve HEAD as a valid ref."); + head = xstrdup(head); + if (!strcmp(head, "HEAD")) { + detached = 1; + } else { + if (prefixcmp(head, "refs/heads/")) + die("HEAD not found below refs/heads!"); + head += 11; + } + hashcpy(merge_filter_ref, head_sha1); + + argc = parse_options(argc, argv, prefix, options, builtin_branch_usage, + 0); + if (!!delete + !!rename + !!force_create > 1) + usage_with_options(builtin_branch_usage, options); + + if (delete) + return delete_branches(argc, argv, delete > 1, kinds); + else if (argc == 0) + return print_ref_list(kinds, detached, verbose, abbrev, with_commit); + else if (rename && (argc == 1)) + rename_branch(head, argv[0], rename > 1); + else if (rename && (argc == 2)) + rename_branch(argv[0], argv[1], rename > 1); + else if (argc <= 2) { + if (kinds != REF_LOCAL_BRANCH) + die("-a and -r options to 'git branch' do not make sense with a branch name"); + create_branch(head, argv[0], (argc == 2) ? argv[1] : head, + force_create, reflog, track); + } else + usage_with_options(builtin_branch_usage, options); + + return 0; +} |