diff options
Diffstat (limited to 'builtin/checkout.c')
| -rw-r--r-- | builtin/checkout.c | 609 |
1 files changed, 396 insertions, 213 deletions
diff --git a/builtin/checkout.c b/builtin/checkout.c index bef324e..6b9061f 100644 --- a/builtin/checkout.c +++ b/builtin/checkout.c @@ -19,6 +19,7 @@ #include "ll-merge.h" #include "resolve-undo.h" #include "submodule.h" +#include "argv-array.h" static const char * const checkout_usage[] = { "git checkout [options] <branch>", @@ -30,8 +31,10 @@ struct checkout_opts { int quiet; int merge; int force; + int force_detach; int writeout_stage; int writeout_error; + int overwrite_ignore; /* not set by parse_options */ int branch_exists; @@ -70,7 +73,7 @@ static int update_some(const unsigned char *sha1, const char *base, int baselen, hashcpy(ce->sha1, sha1); memcpy(ce->name, base, baselen); memcpy(ce->name + baselen, pathname, len - baselen); - ce->ce_flags = create_ce_flags(len, 0); + ce->ce_flags = create_ce_flags(len, 0) | CE_UPDATE; ce->ce_mode = create_ce_mode(mode); add_cache_entry(ce, ADD_CACHE_OK_TO_ADD | ADD_CACHE_OK_TO_REPLACE); return 0; @@ -78,7 +81,10 @@ static int update_some(const unsigned char *sha1, const char *base, int baselen, static int read_tree_some(struct tree *tree, const char **pathspec) { - read_tree_recursive(tree, "", 0, 0, pathspec, update_some, NULL); + struct pathspec ps; + init_pathspec(&ps, pathspec); + read_tree_recursive(tree, "", 0, 0, &ps, update_some, NULL); + free_pathspec(&ps); /* update the index with the given tree's info * for all args, expanding wildcards, and exit @@ -103,21 +109,27 @@ static int check_stage(int stage, struct cache_entry *ce, int pos) return 0; pos++; } - return error("path '%s' does not have %s version", - ce->name, - (stage == 2) ? "our" : "their"); + if (stage == 2) + return error(_("path '%s' does not have our version"), ce->name); + else + return error(_("path '%s' does not have their version"), ce->name); } -static int check_all_stages(struct cache_entry *ce, int pos) +static int check_stages(unsigned stages, struct cache_entry *ce, int pos) { - if (ce_stage(ce) != 1 || - active_nr <= pos + 2 || - strcmp(active_cache[pos+1]->name, ce->name) || - ce_stage(active_cache[pos+1]) != 2 || - strcmp(active_cache[pos+2]->name, ce->name) || - ce_stage(active_cache[pos+2]) != 3) - return error("path '%s' does not have all three versions", - ce->name); + unsigned seen = 0; + const char *name = ce->name; + + while (pos < active_nr) { + ce = active_cache[pos]; + if (strcmp(name, ce->name)) + break; + seen |= (1 << ce_stage(ce)); + pos++; + } + if ((stages & seen) != stages) + return error(_("path '%s' does not have all necessary versions"), + name); return 0; } @@ -130,9 +142,10 @@ static int checkout_stage(int stage, struct cache_entry *ce, int pos, return checkout_entry(active_cache[pos], state, NULL); pos++; } - return error("path '%s' does not have %s version", - ce->name, - (stage == 2) ? "our" : "their"); + if (stage == 2) + return error(_("path '%s' does not have our version"), ce->name); + else + return error(_("path '%s' does not have their version"), ce->name); } static int checkout_merged(int pos, struct checkout *state) @@ -143,18 +156,27 @@ static int checkout_merged(int pos, struct checkout *state) int status; unsigned char sha1[20]; mmbuffer_t result_buf; + unsigned char threeway[3][20]; + unsigned mode = 0; + + memset(threeway, 0, sizeof(threeway)); + while (pos < active_nr) { + int stage; + stage = ce_stage(ce); + if (!stage || strcmp(path, ce->name)) + break; + hashcpy(threeway[stage - 1], ce->sha1); + if (stage == 2) + mode = create_ce_mode(ce->ce_mode); + pos++; + ce = active_cache[pos]; + } + if (is_null_sha1(threeway[1]) || is_null_sha1(threeway[2])) + return error(_("path '%s' does not have necessary versions"), path); - if (ce_stage(ce) != 1 || - active_nr <= pos + 2 || - strcmp(active_cache[pos+1]->name, path) || - ce_stage(active_cache[pos+1]) != 2 || - strcmp(active_cache[pos+2]->name, path) || - ce_stage(active_cache[pos+2]) != 3) - return error("path '%s' does not have all 3 versions", path); - - read_mmblob(&ancestor, active_cache[pos]->sha1); - read_mmblob(&ours, active_cache[pos+1]->sha1); - read_mmblob(&theirs, active_cache[pos+2]->sha1); + read_mmblob(&ancestor, threeway[0]); + read_mmblob(&ours, threeway[1]); + read_mmblob(&theirs, threeway[2]); /* * NEEDSWORK: re-create conflicts from merges with @@ -167,7 +189,7 @@ static int checkout_merged(int pos, struct checkout *state) free(theirs.ptr); if (status < 0 || !result_buf.ptr) { free(result_buf.ptr); - return error("path '%s': cannot merge", path); + return error(_("path '%s': cannot merge"), path); } /* @@ -184,18 +206,16 @@ static int checkout_merged(int pos, struct checkout *state) */ if (write_sha1_file(result_buf.ptr, result_buf.size, blob_type, sha1)) - die("Unable to add merge result for '%s'", path); - ce = make_cache_entry(create_ce_mode(active_cache[pos+1]->ce_mode), - sha1, - path, 2, 0); + die(_("Unable to add merge result for '%s'"), path); + ce = make_cache_entry(mode, sha1, path, 2, 0); if (!ce) - die("make_cache_entry failed for path '%s'", path); + die(_("make_cache_entry failed for path '%s'"), path); status = checkout_entry(ce, state, NULL); return status; } static int checkout_paths(struct tree *source_tree, const char **pathspec, - struct checkout_opts *opts) + const char *prefix, struct checkout_opts *opts) { int pos; struct checkout state; @@ -211,7 +231,7 @@ static int checkout_paths(struct tree *source_tree, const char **pathspec, newfd = hold_locked_index(lock_file, 1); if (read_cache_preload(pathspec) < 0) - return error("corrupt index file"); + return error(_("corrupt index file")); if (source_tree) read_tree_some(source_tree, pathspec); @@ -222,10 +242,12 @@ static int checkout_paths(struct tree *source_tree, const char **pathspec, for (pos = 0; pos < active_nr; pos++) { struct cache_entry *ce = active_cache[pos]; + if (source_tree && !(ce->ce_flags & CE_UPDATE)) + continue; match_pathspec(pathspec, ce->name, ce_namelen(ce), 0, ps_matched); } - if (report_path_error(ps_matched, pathspec, 0)) + if (report_path_error(ps_matched, pathspec, prefix)) return 1; /* "checkout -m path" to recreate conflicted state */ @@ -239,14 +261,14 @@ static int checkout_paths(struct tree *source_tree, const char **pathspec, if (!ce_stage(ce)) continue; if (opts->force) { - warning("path '%s' is unmerged", ce->name); + warning(_("path '%s' is unmerged"), ce->name); } else if (stage) { errs |= check_stage(stage, ce, pos); } else if (opts->merge) { - errs |= check_all_stages(ce, pos); + errs |= check_stages((1<<2) | (1<<3), ce, pos); } else { errs = 1; - error("path '%s' is unmerged", ce->name); + error(_("path '%s' is unmerged"), ce->name); } pos = skip_same_name(ce, pos) - 1; } @@ -260,6 +282,8 @@ static int checkout_paths(struct tree *source_tree, const char **pathspec, state.refresh_cache = 1; for (pos = 0; pos < active_nr; pos++) { struct cache_entry *ce = active_cache[pos]; + if (source_tree && !(ce->ce_flags & CE_UPDATE)) + continue; if (match_pathspec(pathspec, ce->name, ce_namelen(ce), 0, NULL)) { if (!ce_stage(ce)) { errs |= checkout_entry(ce, &state, NULL); @@ -275,9 +299,9 @@ static int checkout_paths(struct tree *source_tree, const char **pathspec, if (write_cache(newfd, active_cache, active_nr) || commit_locked_index(lock_file)) - die("unable to write new index file"); + die(_("unable to write new index file")); - resolve_ref("HEAD", rev, 0, &flag); + read_ref_full("HEAD", rev, 0, &flag); head = lookup_commit_reference_gently(rev, 1); errs |= post_checkout_hook(head, head, 0); @@ -292,7 +316,7 @@ static void show_local_changes(struct object *head, struct diff_options *opts) rev.diffopt.flags = opts->flags; rev.diffopt.output_format |= DIFF_FORMAT_NAME_STATUS; if (diff_setup_done(&rev.diffopt) < 0) - die("diff_setup_done failed"); + die(_("diff_setup_done failed")); add_pending_object(&rev, head, NULL); run_diff_index(&rev, 0); } @@ -300,9 +324,8 @@ static void show_local_changes(struct object *head, struct diff_options *opts) static void describe_detached_head(const char *msg, struct commit *commit) { struct strbuf sb = STRBUF_INIT; - struct pretty_print_context ctx = {0}; parse_commit(commit); - pretty_print_commit(CMIT_FMT_ONELINE, commit, &sb, &ctx); + pp_commit_easy(CMIT_FMT_ONELINE, commit, &sb); fprintf(stderr, "%s %s... %s\n", msg, find_unique_abbrev(commit->object.sha1, DEFAULT_ABBREV), sb.buf); strbuf_release(&sb); @@ -366,7 +389,7 @@ static int merge_working_tree(struct checkout_opts *opts, int newfd = hold_locked_index(lock_file, 1); if (read_cache_preload(NULL) < 0) - return error("corrupt index file"); + return error(_("corrupt index file")); resolve_undo_clear(); if (opts->force) { @@ -388,7 +411,7 @@ static int merge_working_tree(struct checkout_opts *opts, refresh_cache(REFRESH_QUIET); if (unmerged_cache()) { - error("you need to resolve your current index first"); + error(_("you need to resolve your current index first")); return 1; } @@ -399,9 +422,11 @@ static int merge_working_tree(struct checkout_opts *opts, topts.gently = opts->merge && old->commit; topts.verbose_update = !opts->quiet; topts.fn = twoway_merge; - topts.dir = xcalloc(1, sizeof(*topts.dir)); - topts.dir->flags |= DIR_SHOW_IGNORED; - topts.dir->exclude_per_dir = ".gitignore"; + if (opts->overwrite_ignore) { + topts.dir = xcalloc(1, sizeof(*topts.dir)); + topts.dir->flags |= DIR_SHOW_IGNORED; + setup_standard_excludes(topts.dir); + } tree = parse_tree_indirect(old->commit ? old->commit->object.sha1 : EMPTY_TREE_SHA1_BIN); @@ -470,7 +495,7 @@ static int merge_working_tree(struct checkout_opts *opts, if (write_cache(newfd, active_cache, active_nr) || commit_locked_index(lock_file)) - die("unable to write new index file"); + die(_("unable to write new index file")); if (!opts->force && !opts->quiet) show_local_changes(&new->commit->object, &opts->diff_options); @@ -489,20 +514,6 @@ static void report_tracking(struct branch_info *new) strbuf_release(&sb); } -static void detach_advice(const char *old_path, const char *new_name) -{ - const char fmt[] = - "Note: checking out '%s'.\n\n" - "You are in 'detached HEAD' state. You can look around, make experimental\n" - "changes and commit them, and you can discard any commits you make in this\n" - "state without impacting any branches by performing another checkout.\n\n" - "If you want to create a new branch to retain commits you create, you may\n" - "do so (now or later) by using -b with the checkout command again. Example:\n\n" - " git checkout -b new_branch_name\n\n"; - - fprintf(stderr, fmt, new_name); -} - static void update_refs_for_switch(struct checkout_opts *opts, struct branch_info *old, struct branch_info *new) @@ -519,7 +530,7 @@ static void update_refs_for_switch(struct checkout_opts *opts, temp = log_all_ref_updates; log_all_ref_updates = 1; if (log_ref_setup(ref_name, log_file, sizeof(log_file))) { - fprintf(stderr, "Can not do reflog for '%s'\n", + fprintf(stderr, _("Can not do reflog for '%s'\n"), opts->new_orphan_branch); log_all_ref_updates = temp; return; @@ -530,7 +541,9 @@ static void update_refs_for_switch(struct checkout_opts *opts, else create_branch(old->name, opts->new_branch, new->name, opts->new_branch_force ? 1 : 0, - opts->new_branch_log, opts->track); + opts->new_branch_log, + opts->new_branch_force ? 1 : 0, + opts->track); new->name = opts->new_branch; setup_branch_path(new); } @@ -541,19 +554,35 @@ static void update_refs_for_switch(struct checkout_opts *opts, strbuf_addf(&msg, "checkout: moving from %s to %s", old_desc ? old_desc : "(invalid)", new->name); - if (new->path) { + if (!strcmp(new->name, "HEAD") && !new->path && !opts->force_detach) { + /* Nothing to do. */ + } else if (opts->force_detach || !new->path) { /* No longer on any branch. */ + update_ref(msg.buf, "HEAD", new->commit->object.sha1, NULL, + REF_NODEREF, DIE_ON_ERR); + if (!opts->quiet) { + if (old->path && advice_detached_head) + detach_advice(new->name); + describe_detached_head(_("HEAD is now at"), new->commit); + } + } else if (new->path) { /* Switch branches. */ create_symref("HEAD", new->path, msg.buf); if (!opts->quiet) { - if (old->path && !strcmp(new->path, old->path)) - fprintf(stderr, "Already on '%s'\n", - new->name); - else if (opts->new_branch) - fprintf(stderr, "Switched to%s branch '%s'\n", - opts->branch_exists ? " and reset" : " a new", - new->name); - else - fprintf(stderr, "Switched to branch '%s'\n", + if (old->path && !strcmp(new->path, old->path)) { + if (opts->new_branch_force) + fprintf(stderr, _("Reset branch '%s'\n"), + new->name); + else + fprintf(stderr, _("Already on '%s'\n"), + new->name); + } else if (opts->new_branch) { + if (opts->branch_exists) + fprintf(stderr, _("Switched to and reset branch '%s'\n"), new->name); + else + fprintf(stderr, _("Switched to a new branch '%s'\n"), new->name); + } else { + fprintf(stderr, _("Switched to branch '%s'\n"), new->name); + } } if (old->path && old->name) { char log_file[PATH_MAX], ref_file[PATH_MAX]; @@ -563,29 +592,122 @@ static void update_refs_for_switch(struct checkout_opts *opts, if (!file_exists(ref_file) && file_exists(log_file)) remove_path(log_file); } - } else if (strcmp(new->name, "HEAD")) { - update_ref(msg.buf, "HEAD", new->commit->object.sha1, NULL, - REF_NODEREF, DIE_ON_ERR); - if (!opts->quiet) { - if (old->path && advice_detached_head) - detach_advice(old->path, new->name); - describe_detached_head("HEAD is now at", new->commit); - } } remove_branch_state(); strbuf_release(&msg); - if (!opts->quiet && (new->path || !strcmp(new->name, "HEAD"))) + if (!opts->quiet && + (new->path || (!opts->force_detach && !strcmp(new->name, "HEAD")))) report_tracking(new); } +static int add_pending_uninteresting_ref(const char *refname, + const unsigned char *sha1, + int flags, void *cb_data) +{ + add_pending_sha1(cb_data, refname, sha1, flags | UNINTERESTING); + return 0; +} + +static void describe_one_orphan(struct strbuf *sb, struct commit *commit) +{ + parse_commit(commit); + strbuf_addstr(sb, " "); + strbuf_addstr(sb, + find_unique_abbrev(commit->object.sha1, DEFAULT_ABBREV)); + strbuf_addch(sb, ' '); + pp_commit_easy(CMIT_FMT_ONELINE, commit, sb); + strbuf_addch(sb, '\n'); +} + +#define ORPHAN_CUTOFF 4 +static void suggest_reattach(struct commit *commit, struct rev_info *revs) +{ + struct commit *c, *last = NULL; + struct strbuf sb = STRBUF_INIT; + int lost = 0; + while ((c = get_revision(revs)) != NULL) { + if (lost < ORPHAN_CUTOFF) + describe_one_orphan(&sb, c); + last = c; + lost++; + } + if (ORPHAN_CUTOFF < lost) { + int more = lost - ORPHAN_CUTOFF; + if (more == 1) + describe_one_orphan(&sb, last); + else + strbuf_addf(&sb, _(" ... and %d more.\n"), more); + } + + fprintf(stderr, + Q_( + /* The singular version */ + "Warning: you are leaving %d commit behind, " + "not connected to\n" + "any of your branches:\n\n" + "%s\n", + /* The plural version */ + "Warning: you are leaving %d commits behind, " + "not connected to\n" + "any of your branches:\n\n" + "%s\n", + /* Give ngettext() the count */ + lost), + lost, + sb.buf); + strbuf_release(&sb); + + if (advice_detached_head) + fprintf(stderr, + _( + "If you want to keep them by creating a new branch, " + "this may be a good time\nto do so with:\n\n" + " git branch new_branch_name %s\n\n"), + sha1_to_hex(commit->object.sha1)); +} + +/* + * We are about to leave commit that was at the tip of a detached + * HEAD. If it is not reachable from any ref, this is the last chance + * for the user to do so without resorting to reflog. + */ +static void orphaned_commit_warning(struct commit *commit) +{ + struct rev_info revs; + struct object *object = &commit->object; + struct object_array refs; + + init_revisions(&revs, NULL); + setup_revisions(0, NULL, &revs, NULL); + + object->flags &= ~UNINTERESTING; + add_pending_object(&revs, object, sha1_to_hex(object->sha1)); + + for_each_ref(add_pending_uninteresting_ref, &revs); + + refs = revs.pending; + revs.leak_pending = 1; + + if (prepare_revision_walk(&revs)) + die(_("internal error in revision walk")); + if (!(commit->object.flags & UNINTERESTING)) + suggest_reattach(commit, &revs); + else + describe_detached_head(_("Previous HEAD position was"), commit); + + clear_commit_marks_for_object_array(&refs, ALL_REV_FLAGS); + free(refs.objects); +} + static int switch_branches(struct checkout_opts *opts, struct branch_info *new) { int ret = 0; struct branch_info old; + void *path_to_free; unsigned char rev[20]; int flag; memset(&old, 0, sizeof(old)); - old.path = resolve_ref("HEAD", rev, 0, &flag); + old.path = path_to_free = resolve_refdup("HEAD", rev, 0, &flag); old.commit = lookup_commit_reference_gently(rev, 1); if (!(flag & REF_ISSYMREF)) old.path = NULL; @@ -597,25 +719,23 @@ static int switch_branches(struct checkout_opts *opts, struct branch_info *new) new->name = "HEAD"; new->commit = old.commit; if (!new->commit) - die("You are on a branch yet to be born"); + die(_("You are on a branch yet to be born")); parse_commit(new->commit); } ret = merge_working_tree(opts, &old, new); - if (ret) + if (ret) { + free(path_to_free); return ret; + } - /* - * If we were on a detached HEAD, but have now moved to - * a new commit, we want to mention the old commit once more - * to remind the user that it might be lost. - */ if (!opts->quiet && !old.path && old.commit && new->commit != old.commit) - describe_detached_head("Previous HEAD position was", old.commit); + orphaned_commit_warning(old.commit); update_refs_for_switch(opts, &old, new); ret = post_checkout_hook(old.commit, new->commit, 1); + free(path_to_free); return ret || opts->writeout_error; } @@ -675,11 +795,134 @@ static const char *unique_tracking_name(const char *name) return NULL; } +static int parse_branchname_arg(int argc, const char **argv, + int dwim_new_local_branch_ok, + struct branch_info *new, + struct tree **source_tree, + unsigned char rev[20], + const char **new_branch) +{ + int argcount = 0; + unsigned char branch_rev[20]; + const char *arg; + int has_dash_dash; + + /* + * case 1: git checkout <ref> -- [<paths>] + * + * <ref> must be a valid tree, everything after the '--' must be + * a path. + * + * case 2: git checkout -- [<paths>] + * + * everything after the '--' must be paths. + * + * case 3: git checkout <something> [<paths>] + * + * With no paths, if <something> is a commit, that is to + * switch to the branch or detach HEAD at it. As a special case, + * if <something> is A...B (missing A or B means HEAD but you can + * omit at most one side), and if there is a unique merge base + * between A and B, A...B names that merge base. + * + * With no paths, if <something> is _not_ a commit, no -t nor -b + * was given, and there is a tracking branch whose name is + * <something> in one and only one remote, then this is a short-hand + * to fork local <something> from that remote-tracking branch. + * + * Otherwise <something> shall not be ambiguous. + * - If it's *only* a reference, treat it like case (1). + * - If it's only a path, treat it like case (2). + * - else: fail. + * + */ + if (!argc) + return 0; + + if (!strcmp(argv[0], "--")) /* case (2) */ + return 1; + + arg = argv[0]; + has_dash_dash = (argc > 1) && !strcmp(argv[1], "--"); + + if (!strcmp(arg, "-")) + arg = "@{-1}"; + + if (get_sha1_mb(arg, rev)) { + if (has_dash_dash) /* case (1) */ + die(_("invalid reference: %s"), arg); + if (dwim_new_local_branch_ok && + !check_filename(NULL, arg) && + argc == 1) { + const char *remote = unique_tracking_name(arg); + if (!remote || get_sha1(remote, rev)) + return argcount; + *new_branch = arg; + arg = remote; + /* DWIMmed to create local branch */ + } else { + return argcount; + } + } + + /* we can't end up being in (2) anymore, eat the argument */ + argcount++; + argv++; + argc--; + + new->name = arg; + setup_branch_path(new); + + if (!check_refname_format(new->path, 0) && + !read_ref(new->path, branch_rev)) + hashcpy(rev, branch_rev); + else + new->path = NULL; /* not an existing branch */ + + new->commit = lookup_commit_reference_gently(rev, 1); + if (!new->commit) { + /* not a commit */ + *source_tree = parse_tree_indirect(rev); + } else { + parse_commit(new->commit); + *source_tree = new->commit->tree; + } + + if (!*source_tree) /* case (1): want a tree */ + die(_("reference is not a tree: %s"), arg); + if (!has_dash_dash) {/* case (3 -> 1) */ + /* + * Do not complain the most common case + * git checkout branch + * even if there happen to be a file called 'branch'; + * it would be extremely annoying. + */ + if (argc) + verify_non_filename(NULL, arg); + } else { + argcount++; + argv++; + argc--; + } + + return argcount; +} + +static int switch_unborn_to_new_branch(struct checkout_opts *opts) +{ + int status; + struct strbuf branch_ref = STRBUF_INIT; + + strbuf_addf(&branch_ref, "refs/heads/%s", opts->new_branch); + status = create_symref("HEAD", branch_ref.buf, "checkout -b"); + strbuf_release(&branch_ref); + return status; +} + int cmd_checkout(int argc, const char **argv, const char *prefix) { struct checkout_opts opts; unsigned char rev[20]; - const char *arg; struct branch_info new; struct tree *source_tree = NULL; char *conflict_style = NULL; @@ -692,6 +935,7 @@ int cmd_checkout(int argc, const char **argv, const char *prefix) OPT_STRING('B', NULL, &opts.new_branch_force, "branch", "create/reset and checkout a branch"), OPT_BOOLEAN('l', NULL, &opts.new_branch_log, "create reflog for new branch"), + OPT_BOOLEAN(0, "detach", &opts.force_detach, "detach the HEAD at named commit"), OPT_SET_INT('t', "track", &opts.track, "set upstream info for new branch", BRANCH_TRACK_EXPLICIT), OPT_STRING(0, "orphan", &opts.new_orphan_branch, "new branch", "new unparented branch"), @@ -701,6 +945,7 @@ int cmd_checkout(int argc, const char **argv, const char *prefix) 3), OPT__FORCE(&opts.force, "force checkout (throw away local modifications)"), OPT_BOOLEAN('m', "merge", &opts.merge, "perform a 3-way merge with the new branch"), + OPT_BOOLEAN(0, "overwrite-ignore", &opts.overwrite_ignore, "update ignored files (default)"), OPT_STRING(0, "conflict", &conflict_style, "style", "conflict style (merge or diff3)"), OPT_BOOLEAN('p', "patch", &patch_mode, "select hunks interactively"), @@ -709,10 +954,10 @@ int cmd_checkout(int argc, const char **argv, const char *prefix) PARSE_OPT_NOARG | PARSE_OPT_HIDDEN }, OPT_END(), }; - int has_dash_dash; memset(&opts, 0, sizeof(opts)); memset(&new, 0, sizeof(new)); + opts.overwrite_ignore = 1; gitmodules_config(); git_config(git_checkout_config, &opts); @@ -724,36 +969,42 @@ int cmd_checkout(int argc, const char **argv, const char *prefix) /* we can assume from now on new_branch = !new_branch_force */ if (opts.new_branch && opts.new_branch_force) - die("-B cannot be used with -b"); + die(_("-B cannot be used with -b")); /* copy -B over to -b, so that we can just check the latter */ if (opts.new_branch_force) opts.new_branch = opts.new_branch_force; if (patch_mode && (opts.track > 0 || opts.new_branch - || opts.new_branch_log || opts.merge || opts.force)) - die ("--patch is incompatible with all other options"); + || opts.new_branch_log || opts.merge || opts.force + || opts.force_detach)) + die (_("--patch is incompatible with all other options")); + + if (opts.force_detach && (opts.new_branch || opts.new_orphan_branch)) + die(_("--detach cannot be used with -b/-B/--orphan")); + if (opts.force_detach && 0 < opts.track) + die(_("--detach cannot be used with -t")); /* --track without -b should DWIM */ if (0 < opts.track && !opts.new_branch) { const char *argv0 = argv[0]; if (!argc || !strcmp(argv0, "--")) - die ("--track needs a branch name"); + die (_("--track needs a branch name")); if (!prefixcmp(argv0, "refs/")) argv0 += 5; if (!prefixcmp(argv0, "remotes/")) argv0 += 8; argv0 = strchr(argv0, '/'); if (!argv0 || !argv0[1]) - die ("Missing branch name; try -b"); + die (_("Missing branch name; try -b")); opts.new_branch = argv0 + 1; } if (opts.new_orphan_branch) { if (opts.new_branch) - die("--orphan and -b|-B are mutually exclusive"); + die(_("--orphan and -b|-B are mutually exclusive")); if (opts.track > 0) - die("--orphan cannot be used with -t"); + die(_("--orphan cannot be used with -t")); opts.new_branch = opts.new_orphan_branch; } @@ -763,108 +1014,33 @@ int cmd_checkout(int argc, const char **argv, const char *prefix) } if (opts.force && opts.merge) - die("git checkout: -f and -m are incompatible"); + die(_("git checkout: -f and -m are incompatible")); /* - * case 1: git checkout <ref> -- [<paths>] - * - * <ref> must be a valid tree, everything after the '--' must be - * a path. - * - * case 2: git checkout -- [<paths>] - * - * everything after the '--' must be paths. - * - * case 3: git checkout <something> [<paths>] - * - * With no paths, if <something> is a commit, that is to - * switch to the branch or detach HEAD at it. As a special case, - * if <something> is A...B (missing A or B means HEAD but you can - * omit at most one side), and if there is a unique merge base - * between A and B, A...B names that merge base. + * Extract branch name from command line arguments, so + * all that is left is pathspecs. * - * With no paths, if <something> is _not_ a commit, no -t nor -b - * was given, and there is a remote-tracking branch whose name is - * <something> in one and only one remote, then this is a short-hand - * to fork local <something> from that remote-tracking branch. + * Handle * - * Otherwise <something> shall not be ambiguous. - * - If it's *only* a reference, treat it like case (1). - * - If it's only a path, treat it like case (2). - * - else: fail. + * 1) git checkout <tree> -- [<paths>] + * 2) git checkout -- [<paths>] + * 3) git checkout <something> [<paths>] * + * including "last branch" syntax and DWIM-ery for names of + * remote branches, erroring out for invalid or ambiguous cases. */ if (argc) { - if (!strcmp(argv[0], "--")) { /* case (2) */ - argv++; - argc--; - goto no_reference; - } - - arg = argv[0]; - has_dash_dash = (argc > 1) && !strcmp(argv[1], "--"); - - if (!strcmp(arg, "-")) - arg = "@{-1}"; - - if (get_sha1_mb(arg, rev)) { - if (has_dash_dash) /* case (1) */ - die("invalid reference: %s", arg); - if (!patch_mode && - dwim_new_local_branch && - opts.track == BRANCH_TRACK_UNSPECIFIED && - !opts.new_branch && - !check_filename(NULL, arg) && - argc == 1) { - const char *remote = unique_tracking_name(arg); - if (!remote || get_sha1(remote, rev)) - goto no_reference; - opts.new_branch = arg; - arg = remote; - /* DWIMmed to create local branch */ - } - else - goto no_reference; - } - - /* we can't end up being in (2) anymore, eat the argument */ - argv++; - argc--; - - new.name = arg; - if ((new.commit = lookup_commit_reference_gently(rev, 1))) { - setup_branch_path(&new); - - if ((check_ref_format(new.path) == CHECK_REF_FORMAT_OK) && - resolve_ref(new.path, rev, 1, NULL)) - ; - else - new.path = NULL; - parse_commit(new.commit); - source_tree = new.commit->tree; - } else - source_tree = parse_tree_indirect(rev); - - if (!source_tree) /* case (1): want a tree */ - die("reference is not a tree: %s", arg); - if (!has_dash_dash) {/* case (3 -> 1) */ - /* - * Do not complain the most common case - * git checkout branch - * even if there happen to be a file called 'branch'; - * it would be extremely annoying. - */ - if (argc) - verify_non_filename(NULL, arg); - } - else { - argv++; - argc--; - } + int dwim_ok = + !patch_mode && + dwim_new_local_branch && + opts.track == BRANCH_TRACK_UNSPECIFIED && + !opts.new_branch; + int n = parse_branchname_arg(argc, argv, dwim_ok, + &new, &source_tree, rev, &opts.new_branch); + argv += n; + argc -= n; } -no_reference: - if (opts.track == BRANCH_TRACK_UNSPECIFIED) opts.track = git_branch_track; @@ -872,7 +1048,7 @@ no_reference: const char **pathspec = get_pathspec(prefix, argv); if (!pathspec) - die("invalid path specification"); + die(_("invalid path specification")); if (patch_mode) return interactive_checkout(new.name, pathspec, &opts); @@ -880,16 +1056,19 @@ no_reference: /* Checkout paths */ if (opts.new_branch) { if (argc == 1) { - die("git checkout: updating paths is incompatible with switching branches.\nDid you intend to checkout '%s' which can not be resolved as commit?", argv[0]); + die(_("git checkout: updating paths is incompatible with switching branches.\nDid you intend to checkout '%s' which can not be resolved as commit?"), argv[0]); } else { - die("git checkout: updating paths is incompatible with switching branches."); + die(_("git checkout: updating paths is incompatible with switching branches.")); } } + if (opts.force_detach) + die(_("git checkout: --detach does not take a path argument")); + if (1 < !!opts.writeout_stage + !!opts.force + !!opts.merge) - die("git checkout: --ours/--theirs, --force and --merge are incompatible when\nchecking out of the index."); + die(_("git checkout: --ours/--theirs, --force and --merge are incompatible when\nchecking out of the index.")); - return checkout_paths(source_tree, pathspec, &opts); + return checkout_paths(source_tree, pathspec, prefix, &opts); } if (patch_mode) @@ -897,23 +1076,27 @@ no_reference: if (opts.new_branch) { struct strbuf buf = STRBUF_INIT; - if (strbuf_check_branch_ref(&buf, opts.new_branch)) - die("git checkout: we do not like '%s' as a branch name.", - opts.new_branch); - if (!get_sha1(buf.buf, rev)) { - opts.branch_exists = 1; - if (!opts.new_branch_force) - die("git checkout: branch %s already exists", - opts.new_branch); - } + + opts.branch_exists = validate_new_branchname(opts.new_branch, &buf, + !!opts.new_branch_force, + !!opts.new_branch_force); + strbuf_release(&buf); } if (new.name && !new.commit) { - die("Cannot switch branch to a non-commit."); + die(_("Cannot switch branch to a non-commit.")); } if (opts.writeout_stage) - die("--ours/--theirs is incompatible with switching branches."); + die(_("--ours/--theirs is incompatible with switching branches.")); + if (!new.commit) { + unsigned char rev[20]; + int flag; + + if (!read_ref_full("HEAD", rev, 0, &flag) && + (flag & REF_ISSYMREF) && is_null_sha1(rev)) + return switch_unborn_to_new_branch(&opts); + } return switch_branches(&opts, &new); } |