diff options
Diffstat (limited to 'builtin-checkout.c')
| -rw-r--r-- | builtin-checkout.c | 68 |
1 files changed, 64 insertions, 4 deletions
diff --git a/builtin-checkout.c b/builtin-checkout.c index d050c3789..64f3a11ae 100644 --- a/builtin-checkout.c +++ b/builtin-checkout.c @@ -302,8 +302,9 @@ static void show_local_changes(struct object *head) static void describe_detached_head(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, 0, NULL, NULL, 0, 0); + pretty_print_commit(CMIT_FMT_ONELINE, commit, &sb, &ctx); fprintf(stderr, "%s %s... %s\n", msg, find_unique_abbrev(commit->object.sha1, DEFAULT_ABBREV), sb.buf); strbuf_release(&sb); @@ -572,6 +573,40 @@ static int interactive_checkout(const char *revision, const char **pathspec, return run_add_interactive(revision, "--patch=checkout", pathspec); } +struct tracking_name_data { + const char *name; + char *remote; + int unique; +}; + +static int check_tracking_name(const char *refname, const unsigned char *sha1, + int flags, void *cb_data) +{ + struct tracking_name_data *cb = cb_data; + const char *slash; + + if (prefixcmp(refname, "refs/remotes/")) + return 0; + slash = strchr(refname + 13, '/'); + if (!slash || strcmp(slash + 1, cb->name)) + return 0; + if (cb->remote) { + cb->unique = 0; + return 0; + } + cb->remote = xstrdup(refname); + return 0; +} + +static const char *unique_tracking_name(const char *name) +{ + struct tracking_name_data cb_data = { name, NULL, 1 }; + for_each_ref(check_tracking_name, &cb_data); + if (cb_data.unique) + return cb_data.remote; + free(cb_data.remote); + return NULL; +} int cmd_checkout(int argc, const char **argv, const char *prefix) { @@ -582,6 +617,7 @@ int cmd_checkout(int argc, const char **argv, const char *prefix) struct tree *source_tree = NULL; char *conflict_style = NULL; int patch_mode = 0; + int dwim_new_local_branch = 1; struct option options[] = { OPT__QUIET(&opts.quiet), OPT_STRING('b', NULL, &opts.new_branch, "new branch", "branch"), @@ -597,6 +633,9 @@ int cmd_checkout(int argc, const char **argv, const char *prefix) OPT_STRING(0, "conflict", &conflict_style, "style", "conflict style (merge or diff3)"), OPT_BOOLEAN('p', "patch", &patch_mode, "select hunks interactively"), + { OPTION_BOOLEAN, 0, "guess", &dwim_new_local_branch, NULL, + "second guess 'git checkout no-such-branch'", + PARSE_OPT_NOARG | PARSE_OPT_HIDDEN }, OPT_END(), }; int has_dash_dash; @@ -630,8 +669,6 @@ int cmd_checkout(int argc, const char **argv, const char *prefix) opts.new_branch = argv0 + 1; } - if (opts.track == BRANCH_TRACK_UNSPECIFIED) - opts.track = git_branch_track; if (conflict_style) { opts.merge = 1; /* implied */ git_xmerge_config("merge.conflictstyle", conflict_style, NULL); @@ -655,6 +692,11 @@ int cmd_checkout(int argc, const char **argv, const char *prefix) * With no paths, if <something> is a commit, that is to * switch to the branch or detach HEAD at it. * + * 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). @@ -677,7 +719,21 @@ int cmd_checkout(int argc, const char **argv, const char *prefix) if (get_sha1(arg, rev)) { if (has_dash_dash) /* case (1) */ die("invalid reference: %s", arg); - goto no_reference; /* case (3 -> 2) */ + 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 */ @@ -715,6 +771,10 @@ int cmd_checkout(int argc, const char **argv, const char *prefix) } no_reference: + + if (opts.track == BRANCH_TRACK_UNSPECIFIED) + opts.track = git_branch_track; + if (argc) { const char **pathspec = get_pathspec(prefix, argv); |