diff options
Diffstat (limited to 'builtin-branch.c')
| -rw-r--r-- | builtin-branch.c | 653 |
1 files changed, 653 insertions, 0 deletions
diff --git a/builtin-branch.c b/builtin-branch.c new file mode 100644 index 0000000..7408285 --- /dev/null +++ b/builtin-branch.c @@ -0,0 +1,653 @@ +/* + * 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" + +static const char builtin_branch_usage[] = + "git-branch [-r] (-d | -D) <branchname> | [--track | --no-track] [-l] [-f] <branchname> [<start-point>] | (-m | -M) [<oldbranch>] <newbranch> | [--color | --no-color] [-r | -a] [-v [--abbrev=<length> | --no-abbrev]]"; + +#define REF_UNKNOWN_TYPE 0x00 +#define REF_LOCAL_BRANCH 0x01 +#define REF_REMOTE_BRANCH 0x02 +#define REF_TAG 0x04 + +static const char *head; +static unsigned char head_sha1[20]; + +static int branch_track_remotes; + +static int branch_use_color; +static char branch_colors[][COLOR_MAXLEN] = { + "\033[m", /* reset */ + "", /* PLAIN (normal) */ + "\033[31m", /* REMOTE (red) */ + "", /* LOCAL (normal) */ + "\033[32m", /* CURRENT (green) */ +}; +enum color_branch { + COLOR_BRANCH_RESET = 0, + COLOR_BRANCH_PLAIN = 1, + COLOR_BRANCH_REMOTE = 2, + COLOR_BRANCH_LOCAL = 3, + COLOR_BRANCH_CURRENT = 4, +}; + +static int parse_branch_color_slot(const char *var, int ofs) +{ + if (!strcasecmp(var+ofs, "plain")) + return COLOR_BRANCH_PLAIN; + if (!strcasecmp(var+ofs, "reset")) + return COLOR_BRANCH_RESET; + if (!strcasecmp(var+ofs, "remote")) + return COLOR_BRANCH_REMOTE; + if (!strcasecmp(var+ofs, "local")) + return COLOR_BRANCH_LOCAL; + if (!strcasecmp(var+ofs, "current")) + return COLOR_BRANCH_CURRENT; + die("bad config variable '%s'", var); +} + +int git_branch_config(const char *var, const char *value) +{ + if (!strcmp(var, "color.branch")) { + branch_use_color = git_config_colorbool(var, value); + return 0; + } + if (!prefixcmp(var, "color.branch.")) { + int slot = parse_branch_color_slot(var, 13); + color_parse(value, var, branch_colors[slot]); + return 0; + } + if (!strcmp(var, "branch.autosetupmerge")) + branch_track_remotes = git_config_bool(var, value); + + return git_default_config(var, value); +} + +const char *branch_get_color(enum color_branch ix) +{ + if (branch_use_color) + return branch_colors[ix]; + return ""; +} + +static int delete_branches(int argc, const char **argv, int force, int kinds) +{ + struct commit *rev, *head_rev = head_rev; + unsigned char sha1[20]; + char *name = NULL; + const char *fmt, *remote; + int i; + int ret = 0; + + 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++) { + if (kinds == REF_LOCAL_BRANCH && !strcmp(head, argv[i])) { + error("Cannot delete the branch '%s' " + "which you are currently on.", argv[i]); + ret = 1; + continue; + } + + if (name) + free(name); + + name = xstrdup(mkpath(fmt, argv[i])); + if (!resolve_ref(name, sha1, 1, NULL)) { + error("%sbranch '%s' not found.", + remote, argv[i]); + ret = 1; + continue; + } + + rev = lookup_commit_reference(sha1); + if (!rev) { + error("Couldn't look up commit object for '%s'", name); + ret = 1; + continue; + } + + /* This checks whether the merge bases of branch and + * HEAD contains branch -- which means that the HEAD + * contains everything in both. + */ + + if (!force && + !in_merge_bases(rev, &head_rev, 1)) { + error("The branch '%s' is not a strict subset of " + "your current HEAD.\n" + "If you are sure you want to delete it, " + "run 'git branch -D %s'.", argv[i], argv[i]); + ret = 1; + continue; + } + + if (delete_ref(name, sha1)) { + error("Error deleting %sbranch '%s'", remote, + argv[i]); + ret = 1; + } else + printf("Deleted %sbranch %s.\n", remote, argv[i]); + + } + + if (name) + free(name); + + return(ret); +} + +struct ref_item { + char *name; + unsigned int kind; + unsigned char sha1[20]; +}; + +struct ref_list { + int index, alloc, maxwidth; + struct ref_item *list; + int kinds; +}; + +static int append_ref(const char *refname, const unsigned char *sha1, int flags, void *cb_data) +{ + struct ref_list *ref_list = (struct ref_list*)(cb_data); + struct ref_item *newitem; + int kind = REF_UNKNOWN_TYPE; + int len; + + /* Detect kind */ + if (!prefixcmp(refname, "refs/heads/")) { + kind = REF_LOCAL_BRANCH; + refname += 11; + } else if (!prefixcmp(refname, "refs/remotes/")) { + kind = REF_REMOTE_BRANCH; + refname += 13; + } else if (!prefixcmp(refname, "refs/tags/")) { + kind = REF_TAG; + refname += 10; + } + + /* Don't add types the caller doesn't want */ + if ((kind & ref_list->kinds) == 0) + return 0; + + /* 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; + hashcpy(newitem->sha1, sha1); + len = strlen(newitem->name); + if (len > ref_list->maxwidth) + ref_list->maxwidth = 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); +} + +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 print_ref_item(struct ref_item *item, int maxwidth, int verbose, + int abbrev, int current) +{ + char c; + int color; + struct commit *commit; + char subject[256]; + + switch (item->kind) { + case REF_LOCAL_BRANCH: + color = COLOR_BRANCH_LOCAL; + break; + case REF_REMOTE_BRANCH: + color = COLOR_BRANCH_REMOTE; + break; + default: + color = COLOR_BRANCH_PLAIN; + break; + } + + c = ' '; + if (current) { + c = '*'; + color = COLOR_BRANCH_CURRENT; + } + + if (verbose) { + commit = lookup_commit(item->sha1); + if (commit && !parse_commit(commit)) + pretty_print_commit(CMIT_FMT_ONELINE, commit, ~0, + subject, sizeof(subject), 0, + NULL, NULL, 0); + else + strcpy(subject, " **** invalid ref ****"); + printf("%c %s%-*s%s %s %s\n", c, branch_get_color(color), + maxwidth, item->name, + branch_get_color(COLOR_BRANCH_RESET), + find_unique_abbrev(item->sha1, abbrev), subject); + } else { + printf("%c %s%s%s\n", c, branch_get_color(color), item->name, + branch_get_color(COLOR_BRANCH_RESET)); + } +} + +static void print_ref_list(int kinds, int detached, int verbose, int abbrev) +{ + int i; + struct ref_list ref_list; + + memset(&ref_list, 0, sizeof(ref_list)); + ref_list.kinds = kinds; + for_each_ref(append_ref, &ref_list); + + qsort(ref_list.list, ref_list.index, sizeof(struct ref_item), ref_cmp); + + detached = (detached && (kinds & REF_LOCAL_BRANCH)); + if (detached) { + struct ref_item item; + item.name = xstrdup("(no branch)"); + item.kind = REF_LOCAL_BRANCH; + hashcpy(item.sha1, head_sha1); + if (strlen(item.name) > ref_list.maxwidth) + ref_list.maxwidth = strlen(item.name); + print_ref_item(&item, ref_list.maxwidth, verbose, abbrev, 1); + free(item.name); + } + + 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); + print_ref_item(&ref_list.list[i], ref_list.maxwidth, verbose, + abbrev, current); + } + + free_ref_list(&ref_list); +} + +static char *config_repo; +static char *config_remote; +static const char *start_ref; +static int start_len; +static int base_len; + +static int get_remote_branch_name(const char *value) +{ + const char *colon; + const char *end; + + if (*value == '+') + value++; + + colon = strchr(value, ':'); + if (!colon) + return 0; + + end = value + strlen(value); + + /* Try an exact match first. */ + if (!strcmp(colon + 1, start_ref)) { + /* Truncate the value before the colon. */ + nfasprintf(&config_repo, "%.*s", colon - value, value); + return 1; + } + + /* Try with a wildcard match now. */ + if (end - value > 2 && end[-2] == '/' && end[-1] == '*' && + colon - value > 2 && colon[-2] == '/' && colon[-1] == '*' && + (end - 2) - (colon + 1) == base_len && + !strncmp(colon + 1, start_ref, base_len)) { + /* Replace the star with the remote branch name. */ + nfasprintf(&config_repo, "%.*s%s", + (colon - 2) - value, value, + start_ref + base_len); + return 1; + } + + return 0; +} + +static int get_remote_config(const char *key, const char *value) +{ + const char *var; + if (prefixcmp(key, "remote.")) + return 0; + + var = strrchr(key, '.'); + if (var == key + 6) + return 0; + + if (!strcmp(var, ".fetch") && get_remote_branch_name(value)) + nfasprintf(&config_remote, "%.*s", var - (key + 7), key + 7); + + return 0; +} + +static void set_branch_merge(const char *name, const char *config_remote, + const char *config_repo) +{ + char key[1024]; + if (sizeof(key) <= + snprintf(key, sizeof(key), "branch.%s.remote", name)) + die("what a long branch name you have!"); + git_config_set(key, config_remote); + + /* + * We do not have to check if we have enough space for + * the 'merge' key, since it's shorter than the + * previous 'remote' key, which we already checked. + */ + snprintf(key, sizeof(key), "branch.%s.merge", name); + git_config_set(key, config_repo); +} + +static void set_branch_defaults(const char *name, const char *real_ref) +{ + const char *slash = strrchr(real_ref, '/'); + + if (!slash) + return; + + start_ref = real_ref; + start_len = strlen(real_ref); + base_len = slash - real_ref; + git_config(get_remote_config); + if (!config_repo && !config_remote && + !prefixcmp(real_ref, "refs/heads/")) { + set_branch_merge(name, ".", real_ref); + printf("Branch %s set up to track local branch %s.\n", + name, real_ref); + } + + if (config_repo && config_remote) { + set_branch_merge(name, config_remote, config_repo); + printf("Branch %s set up to track remote branch %s.\n", + name, real_ref); + } + + if (config_repo) + free(config_repo); + if (config_remote) + free(config_remote); +} + +static void create_branch(const char *name, const char *start_name, + int force, int reflog, int track) +{ + struct ref_lock *lock; + struct commit *commit; + unsigned char sha1[20]; + char *real_ref, ref[PATH_MAX], msg[PATH_MAX + 20]; + int forcing = 0; + + snprintf(ref, sizeof ref, "refs/heads/%s", name); + if (check_ref_format(ref)) + die("'%s' is not a valid branch name.", name); + + if (resolve_ref(ref, sha1, 1, NULL)) { + if (!force) + die("A branch named '%s' already exists.", name); + else if (!is_bare_repository() && !strcmp(head, name)) + die("Cannot force update the current branch."); + forcing = 1; + } + + real_ref = NULL; + if (get_sha1(start_name, sha1)) + die("Not a valid object name: '%s'.", start_name); + + switch (dwim_ref(start_name, strlen(start_name), sha1, &real_ref)) { + case 0: + /* Not branching from any existing branch */ + real_ref = NULL; + break; + case 1: + /* Unique completion -- good */ + break; + default: + die("Ambiguous object name: '%s'.", start_name); + break; + } + + if ((commit = lookup_commit_reference(sha1)) == NULL) + die("Not a valid branch point: '%s'.", start_name); + hashcpy(sha1, commit->object.sha1); + + lock = lock_any_ref_for_update(ref, NULL); + if (!lock) + die("Failed to lock ref for update: %s.", strerror(errno)); + + if (reflog) + log_all_ref_updates = 1; + + if (forcing) + snprintf(msg, sizeof msg, "branch: Reset from %s", + start_name); + else + snprintf(msg, sizeof msg, "branch: Created from %s", + start_name); + + /* When branching off a remote branch, set up so that git-pull + automatically merges from there. So far, this is only done for + remotes registered via .git/config. */ + if (real_ref && track) + set_branch_defaults(name, real_ref); + + if (write_ref_sha1(lock, sha1, msg) < 0) + die("Failed to write ref: %s.", strerror(errno)); + + if (real_ref) + free(real_ref); +} + +static void rename_branch(const char *oldname, const char *newname, int force) +{ + char oldref[PATH_MAX], newref[PATH_MAX], logmsg[PATH_MAX*2 + 100]; + unsigned char sha1[20]; + char oldsection[PATH_MAX], newsection[PATH_MAX]; + + if (!oldname) + die("cannot rename the current branch while not on any."); + + if (snprintf(oldref, sizeof(oldref), "refs/heads/%s", oldname) > sizeof(oldref)) + die("Old branchname too long"); + + if (check_ref_format(oldref)) + die("Invalid branch name: %s", oldref); + + if (snprintf(newref, sizeof(newref), "refs/heads/%s", newname) > sizeof(newref)) + die("New branchname too long"); + + if (check_ref_format(newref)) + die("Invalid branch name: %s", newref); + + if (resolve_ref(newref, sha1, 1, NULL) && !force) + die("A branch named '%s' already exists.", newname); + + snprintf(logmsg, sizeof(logmsg), "Branch: renamed %s to %s", + oldref, newref); + + if (rename_ref(oldref, newref, logmsg)) + die("Branch rename failed"); + + /* no need to pass logmsg here as HEAD didn't really move */ + if (!strcmp(oldname, head) && create_symref("HEAD", newref, NULL)) + die("Branch renamed to %s, but HEAD is not updated!", newname); + + snprintf(oldsection, sizeof(oldsection), "branch.%s", oldref + 11); + snprintf(newsection, sizeof(newsection), "branch.%s", newref + 11); + if (git_config_rename_section(oldsection, newsection) < 0) + die("Branch is renamed, but update of config-file failed"); +} + +int cmd_branch(int argc, const char **argv, const char *prefix) +{ + int delete = 0, force_delete = 0, force_create = 0; + int rename = 0, force_rename = 0; + int verbose = 0, abbrev = DEFAULT_ABBREV, detached = 0; + int reflog = 0, track; + int kinds = REF_LOCAL_BRANCH; + int i; + + git_config(git_branch_config); + track = branch_track_remotes; + + for (i = 1; i < argc; i++) { + const char *arg = argv[i]; + + if (arg[0] != '-') + break; + if (!strcmp(arg, "--")) { + i++; + break; + } + if (!strcmp(arg, "--track")) { + track = 1; + continue; + } + if (!strcmp(arg, "--no-track")) { + track = 0; + continue; + } + if (!strcmp(arg, "-d")) { + delete = 1; + continue; + } + if (!strcmp(arg, "-D")) { + delete = 1; + force_delete = 1; + continue; + } + if (!strcmp(arg, "-f")) { + force_create = 1; + continue; + } + if (!strcmp(arg, "-m")) { + rename = 1; + continue; + } + if (!strcmp(arg, "-M")) { + rename = 1; + force_rename = 1; + continue; + } + if (!strcmp(arg, "-r")) { + kinds = REF_REMOTE_BRANCH; + continue; + } + if (!strcmp(arg, "-a")) { + kinds = REF_REMOTE_BRANCH | REF_LOCAL_BRANCH; + continue; + } + if (!strcmp(arg, "-l")) { + reflog = 1; + continue; + } + if (!prefixcmp(arg, "--no-abbrev")) { + abbrev = 0; + continue; + } + if (!prefixcmp(arg, "--abbrev=")) { + abbrev = strtoul(arg + 9, NULL, 10); + if (abbrev < MINIMUM_ABBREV) + abbrev = MINIMUM_ABBREV; + else if (abbrev > 40) + abbrev = 40; + continue; + } + if (!strcmp(arg, "-v")) { + verbose = 1; + continue; + } + if (!strcmp(arg, "--color")) { + branch_use_color = 1; + continue; + } + if (!strcmp(arg, "--no-color")) { + branch_use_color = 0; + continue; + } + usage(builtin_branch_usage); + } + + if ((delete && rename) || (delete && force_create) || + (rename && force_create)) + usage(builtin_branch_usage); + + head = xstrdup(resolve_ref("HEAD", head_sha1, 0, NULL)); + if (!head) + die("Failed to resolve HEAD as a valid ref."); + if (!strcmp(head, "HEAD")) { + detached = 1; + } + else { + if (prefixcmp(head, "refs/heads/")) + die("HEAD not found below refs/heads!"); + head += 11; + } + + if (delete) + return delete_branches(argc - i, argv + i, force_delete, kinds); + else if (i == argc) + print_ref_list(kinds, detached, verbose, abbrev); + else if (rename && (i == argc - 1)) + rename_branch(head, argv[i], force_rename); + else if (rename && (i == argc - 2)) + rename_branch(argv[i], argv[i + 1], force_rename); + else if (i == argc - 1 || i == argc - 2) + create_branch(argv[i], (i == argc - 2) ? argv[i+1] : head, + force_create, reflog, track); + else + usage(builtin_branch_usage); + + return 0; +} |