diff options
Diffstat (limited to 'builtin-checkout.c')
| -rw-r--r-- | builtin-checkout.c | 242 |
1 files changed, 123 insertions, 119 deletions
diff --git a/builtin-checkout.c b/builtin-checkout.c index aec2bc6f8d..c107fd643a 100644 --- a/builtin-checkout.c +++ b/builtin-checkout.c @@ -32,7 +32,7 @@ static int post_checkout_hook(struct commit *old, struct commit *new, memset(&proc, 0, sizeof(proc)); argv[0] = name; - argv[1] = xstrdup(sha1_to_hex(old->object.sha1)); + argv[1] = xstrdup(sha1_to_hex(old ? old->object.sha1 : null_sha1)); argv[2] = xstrdup(sha1_to_hex(new->object.sha1)); argv[3] = changed ? "1" : "0"; argv[4] = NULL; @@ -43,7 +43,7 @@ static int post_checkout_hook(struct commit *old, struct commit *new, } static int update_some(const unsigned char *sha1, const char *base, int baselen, - const char *pathname, unsigned mode, int stage) + const char *pathname, unsigned mode, int stage, void *context) { int len; struct cache_entry *ce; @@ -67,7 +67,7 @@ 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); + read_tree_recursive(tree, "", 0, 0, pathspec, update_some, NULL); /* update the index with the given tree's info * for all args, expanding wildcards, and exit @@ -76,6 +76,15 @@ static int read_tree_some(struct tree *tree, const char **pathspec) return 0; } +static int skip_same_name(struct cache_entry *ce, int pos) +{ + while (++pos < active_nr && + !strcmp(active_cache[pos]->name, ce->name)) + ; /* skip */ + return pos; +} + + static int checkout_paths(struct tree *source_tree, const char **pathspec) { int pos; @@ -107,6 +116,20 @@ static int checkout_paths(struct tree *source_tree, const char **pathspec) if (report_path_error(ps_matched, pathspec, 0)) return 1; + /* Any unmerged paths? */ + for (pos = 0; pos < active_nr; pos++) { + struct cache_entry *ce = active_cache[pos]; + if (pathspec_match(pathspec, NULL, ce->name, 0)) { + if (!ce_stage(ce)) + continue; + errs = 1; + error("path '%s' is unmerged", ce->name); + pos = skip_same_name(ce, pos) - 1; + } + } + if (errs) + return 1; + /* Now we are committed to check them out */ memset(&state, 0, sizeof(state)); state.force = 1; @@ -114,7 +137,11 @@ 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 (pathspec_match(pathspec, NULL, ce->name, 0)) { - errs |= checkout_entry(ce, &state, NULL); + if (!ce_stage(ce)) { + errs |= checkout_entry(ce, &state, NULL); + continue; + } + pos = skip_same_name(ce, pos) - 1; } } @@ -242,6 +269,7 @@ static int merge_working_tree(struct checkout_opts *opts, } /* 2-way merge to the new branch */ + topts.initial_checkout = is_cache_unborn(); topts.update = 1; topts.merge = 1; topts.gently = opts->merge; @@ -299,103 +327,21 @@ static int merge_working_tree(struct checkout_opts *opts, commit_locked_index(lock_file)) die("unable to write new index file"); - if (!opts->force) + if (!opts->force && !opts->quiet) show_local_changes(&new->commit->object); return 0; } -static void report_tracking(struct branch_info *new, struct checkout_opts *opts) +static void report_tracking(struct branch_info *new) { - /* - * We have switched to a new branch; is it building on - * top of another branch, and if so does that other branch - * have changes we do not have yet? - */ - char *base; - unsigned char sha1[20]; - struct commit *ours, *theirs; - char symmetric[84]; - struct rev_info revs; - const char *rev_argv[10]; - int rev_argc; - int num_ours, num_theirs; - const char *remote_msg; + struct strbuf sb = STRBUF_INIT; struct branch *branch = branch_get(new->name); - /* - * Nothing to report unless we are marked to build on top of - * somebody else. - */ - if (!branch || !branch->merge || !branch->merge[0] || !branch->merge[0]->dst) - return; - - /* - * If what we used to build on no longer exists, there is - * nothing to report. - */ - base = branch->merge[0]->dst; - if (!resolve_ref(base, sha1, 1, NULL)) + if (!format_tracking_info(branch, &sb)) return; - - theirs = lookup_commit(sha1); - ours = new->commit; - if (!hashcmp(sha1, ours->object.sha1)) - return; /* we are the same */ - - /* Run "rev-list --left-right ours...theirs" internally... */ - rev_argc = 0; - rev_argv[rev_argc++] = NULL; - rev_argv[rev_argc++] = "--left-right"; - rev_argv[rev_argc++] = symmetric; - rev_argv[rev_argc++] = "--"; - rev_argv[rev_argc] = NULL; - - strcpy(symmetric, sha1_to_hex(ours->object.sha1)); - strcpy(symmetric + 40, "..."); - strcpy(symmetric + 43, sha1_to_hex(theirs->object.sha1)); - - init_revisions(&revs, NULL); - setup_revisions(rev_argc, rev_argv, &revs, NULL); - prepare_revision_walk(&revs); - - /* ... and count the commits on each side. */ - num_ours = 0; - num_theirs = 0; - while (1) { - struct commit *c = get_revision(&revs); - if (!c) - break; - if (c->object.flags & SYMMETRIC_LEFT) - num_ours++; - else - num_theirs++; - } - - if (!prefixcmp(base, "refs/remotes/")) { - remote_msg = " remote"; - base += strlen("refs/remotes/"); - } else { - remote_msg = ""; - } - - if (!num_theirs) - printf("Your branch is ahead of the tracked%s branch '%s' " - "by %d commit%s.\n", - remote_msg, base, - num_ours, (num_ours == 1) ? "" : "s"); - else if (!num_ours) - printf("Your branch is behind the tracked%s branch '%s' " - "by %d commit%s,\n" - "and can be fast-forwarded.\n", - remote_msg, base, - num_theirs, (num_theirs == 1) ? "" : "s"); - else - printf("Your branch and the tracked%s branch '%s' " - "have diverged,\nand respectively " - "have %d and %d different commit(s) each.\n", - remote_msg, base, - num_ours, num_theirs); + fputs(sb.buf, stdout); + strbuf_release(&sb); } static void update_refs_for_switch(struct checkout_opts *opts, @@ -413,10 +359,10 @@ static void update_refs_for_switch(struct checkout_opts *opts, strbuf_init(&msg, 0); old_desc = old->name; - if (!old_desc) + if (!old_desc && old->commit) old_desc = sha1_to_hex(old->commit->object.sha1); strbuf_addf(&msg, "checkout: moving from %s to %s", - old_desc, new->name); + old_desc ? old_desc : "(invalid)", new->name); if (new->path) { create_symref("HEAD", new->path, msg.buf); @@ -441,7 +387,7 @@ static void update_refs_for_switch(struct checkout_opts *opts, remove_branch_state(); strbuf_release(&msg); if (!opts->quiet && (new->path || !strcmp(new->name, "HEAD"))) - report_tracking(new, opts); + report_tracking(new); } static int switch_branches(struct checkout_opts *opts, struct branch_info *new) @@ -468,16 +414,14 @@ static int switch_branches(struct checkout_opts *opts, struct branch_info *new) } /* - * If the new thing isn't a branch and isn't HEAD and we're - * not starting a new branch, and we want messages, and we - * weren't on a branch, and we're moving to a new commit, - * describe the old commit. + * If we were on a detached HEAD, but we are now moving to + * a new commit, we want to mention the old commit once more + * to remind the user that it might be lost. */ - if (!new->path && strcmp(new->name, "HEAD") && !opts->new_branch && - !opts->quiet && !old.path && new->commit != old.commit) + if (!opts->quiet && !old.path && old.commit && new->commit != old.commit) describe_detached_head("Previous HEAD position was", old.commit); - if (!old.commit) { + if (!old.commit && !opts->force) { if (!opts->quiet) { fprintf(stderr, "warning: You appear to be on a branch yet to be born.\n"); fprintf(stderr, "warning: Forcing checkout of %s.\n", new->name); @@ -512,6 +456,7 @@ int cmd_checkout(int argc, const char **argv, const char *prefix) OPT_BOOLEAN('m', NULL, &opts.merge, "merge"), OPT_END(), }; + int has_dash_dash; memset(&opts, 0, sizeof(opts)); memset(&new, 0, sizeof(new)); @@ -522,11 +467,55 @@ int cmd_checkout(int argc, const char **argv, const char *prefix) argc = parse_options(argc, argv, options, checkout_usage, PARSE_OPT_KEEP_DASHDASH); + + if (!opts.new_branch && (opts.track != git_branch_track)) + die("git checkout: --track and --no-track require -b"); + + if (opts.force && opts.merge) + 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. + * + * 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) { + if (!strcmp(argv[0], "--")) { /* case (2) */ + argv++; + argc--; + goto no_reference; + } + arg = argv[0]; - if (get_sha1(arg, rev)) - ; - else if ((new.commit = lookup_commit_reference_gently(rev, 1))) { + has_dash_dash = (argc > 1) && !strcmp(argv[1], "--"); + + if (get_sha1(arg, rev)) { + if (has_dash_dash) /* case (1) */ + die("invalid reference: %s", arg); + goto no_reference; /* case (3 -> 2) */ + } + + /* we can't end up being in (2) anymore, eat the argument */ + argv++; + argc--; + + if ((new.commit = lookup_commit_reference_gently(rev, 1))) { new.name = arg; setup_branch_path(&new); if (resolve_ref(new.path, rev, 1, NULL)) @@ -535,25 +524,28 @@ int cmd_checkout(int argc, const char **argv, const char *prefix) new.path = NULL; parse_commit(new.commit); source_tree = new.commit->tree; - argv++; - argc--; - } else if ((source_tree = parse_tree_indirect(rev))) { + } 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--; } } - if (argc && !strcmp(argv[0], "--")) { - argv++; - argc--; - } - - if (!opts.new_branch && (opts.track != git_branch_track)) - die("git checkout: --track and --no-track require -b"); - - if (opts.force && opts.merge) - die("git checkout: -f and -m are incompatible"); - +no_reference: if (argc) { const char **pathspec = get_pathspec(prefix, argv); @@ -572,6 +564,18 @@ int cmd_checkout(int argc, const char **argv, const char *prefix) return checkout_paths(source_tree, pathspec); } + if (opts.new_branch) { + struct strbuf buf; + strbuf_init(&buf, 0); + strbuf_addstr(&buf, "refs/heads/"); + strbuf_addstr(&buf, opts.new_branch); + if (!get_sha1(buf.buf, rev)) + die("git checkout: branch %s already exists", opts.new_branch); + if (check_ref_format(buf.buf)) + die("git checkout: we do not like '%s' as a branch name.", opts.new_branch); + strbuf_release(&buf); + } + if (new.name && !new.commit) { die("Cannot switch branch to a non-commit."); } |