#include "xdiff-interface.h"
#include "ll-merge.h"
#include "resolve-undo.h"
+#include "submodule.h"
static const char * const checkout_usage[] = {
"git checkout [options] <branch>",
int writeout_stage;
int writeout_error;
+ /* not set by parse_options */
+ int branch_exists;
+
const char *new_branch;
+ const char *new_branch_force;
+ const char *new_orphan_branch;
int new_branch_log;
enum branch_track track;
+ struct diff_options diff_options;
};
static int post_checkout_hook(struct commit *old, struct commit *new,
read_mmblob(&ours, active_cache[pos+1]->sha1);
read_mmblob(&theirs, active_cache[pos+2]->sha1);
+ /*
+ * NEEDSWORK: re-create conflicts from merges with
+ * merge.renormalize set, too
+ */
status = ll_merge(&result_buf, path, &ancestor, "base",
- &ours, "ours", &theirs, "theirs", 0);
+ &ours, "ours", &theirs, "theirs", NULL);
free(ancestor.ptr);
free(ours.ptr);
free(theirs.ptr);
return errs;
}
-static void show_local_changes(struct object *head)
+static void show_local_changes(struct object *head, struct diff_options *opts)
{
struct rev_info rev;
/* I think we want full paths, even if we're in a subdirectory. */
init_revisions(&rev, NULL);
- rev.abbrev = 0;
+ 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");
topts.src_index = &the_index;
topts.dst_index = &the_index;
- topts.msgs.not_uptodate_file = "You have local changes to '%s'; cannot switch branches.";
+ setup_unpack_trees_porcelain(&topts, "checkout");
refresh_cache(REFRESH_QUIET);
*/
add_files_to_cache(NULL, NULL, 0);
+ /*
+ * NEEDSWORK: carrying over local changes
+ * when branches have different end-of-line
+ * normalization (or clean+smudge rules) is
+ * a pain; plumb in an option to set
+ * o.renormalize?
+ */
init_merge_options(&o);
o.verbosity = 0;
work = write_tree_from_memory(&o);
die("unable to write new index file");
if (!opts->force && !opts->quiet)
- show_local_changes(&new->commit->object);
+ show_local_changes(&new->commit->object, &opts->diff_options);
return 0;
}
struct strbuf msg = STRBUF_INIT;
const char *old_desc;
if (opts->new_branch) {
- create_branch(old->name, opts->new_branch, new->name, 0,
- opts->new_branch_log, opts->track);
+ if (opts->new_orphan_branch) {
+ if (opts->new_branch_log && !log_all_ref_updates) {
+ int temp;
+ char log_file[PATH_MAX];
+ char *ref_name = mkpath("refs/heads/%s", opts->new_orphan_branch);
+
+ 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",
+ opts->new_orphan_branch);
+ log_all_ref_updates = temp;
+ return;
+ }
+ log_all_ref_updates = temp;
+ }
+ }
+ else
+ create_branch(old->name, opts->new_branch, new->name,
+ opts->new_branch_force ? 1 : 0,
+ opts->new_branch_log, opts->track);
new->name = opts->new_branch;
setup_branch_path(new);
}
if (old->path && !strcmp(new->path, old->path))
fprintf(stderr, "Already on '%s'\n",
new->name);
- else
+ else if (opts->new_branch)
fprintf(stderr, "Switched to%s branch '%s'\n",
- opts->new_branch ? " a new" : "",
+ opts->branch_exists ? " and reset" : " a new",
+ 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];
+
+ git_snpath(log_file, sizeof(log_file), "logs/%s", old->path);
+ git_snpath(ref_file, sizeof(ref_file), "%s", old->path);
+ 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);
report_tracking(new);
}
+struct rev_list_args {
+ int argc;
+ int alloc;
+ const char **argv;
+};
+
+static void add_one_rev_list_arg(struct rev_list_args *args, const char *s)
+{
+ ALLOC_GROW(args->argv, args->argc + 1, args->alloc);
+ args->argv[args->argc++] = s;
+}
+
+static int add_one_ref_to_rev_list_arg(const char *refname,
+ const unsigned char *sha1,
+ int flags,
+ void *cb_data)
+{
+ add_one_rev_list_arg(cb_data, refname);
+ return 0;
+}
+
+
+static void describe_one_orphan(struct strbuf *sb, struct commit *commit)
+{
+ struct pretty_print_context ctx = { 0 };
+
+ parse_commit(commit);
+ strbuf_addstr(sb, " - ");
+ pretty_print_commit(CMIT_FMT_ONELINE, commit, sb, &ctx);
+ 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,
+ "Warning: you are leaving %d commit%s behind, "
+ "not connected to\n"
+ "any of your branches:\n\n"
+ "%s\n",
+ lost, ((1 < lost) ? "s" : ""),
+ 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_list_args args = { 0, 0, NULL };
+ struct rev_info revs;
+
+ add_one_rev_list_arg(&args, "(internal)");
+ add_one_rev_list_arg(&args, sha1_to_hex(commit->object.sha1));
+ add_one_rev_list_arg(&args, "--not");
+ for_each_ref(add_one_ref_to_rev_list_arg, &args);
+ add_one_rev_list_arg(&args, "--");
+ add_one_rev_list_arg(&args, NULL);
+
+ init_revisions(&revs, NULL);
+ if (setup_revisions(args.argc - 1, args.argv, &revs, NULL) != 1)
+ die("internal error: only -- alone should have been left");
+ 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);
+}
+
static int switch_branches(struct checkout_opts *opts, struct branch_info *new)
{
int ret = 0;
if (ret)
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);
static int git_checkout_config(const char *var, const char *value, void *cb)
{
- return git_xmerge_config(var, value, cb);
+ if (!strcmp(var, "diff.ignoresubmodules")) {
+ struct checkout_opts *opts = cb;
+ handle_ignore_submodules_arg(&opts->diff_options, value);
+ return 0;
+ }
+
+ if (!prefixcmp(var, "submodule."))
+ return parse_submodule_config_option(var, value);
+
+ return git_xmerge_config(var, value, NULL);
}
static int interactive_checkout(const char *revision, const char **pathspec,
static const char *unique_tracking_name(const char *name)
{
- struct tracking_name_data cb_data = { name, NULL, 1 };
+ struct tracking_name_data cb_data = { NULL, NULL, 1 };
+ cb_data.name = name;
for_each_ref(check_tracking_name, &cb_data);
if (cb_data.unique)
return cb_data.remote;
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"),
- OPT_BOOLEAN('l', NULL, &opts.new_branch_log, "log for new branch"),
- OPT_SET_INT('t', "track", &opts.track, "track",
+ OPT__QUIET(&opts.quiet, "suppress progress reporting"),
+ OPT_STRING('b', NULL, &opts.new_branch, "branch",
+ "create and checkout a new branch"),
+ 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_SET_INT('t', "track", &opts.track, "set upstream info for new branch",
BRANCH_TRACK_EXPLICIT),
- OPT_SET_INT('2', "ours", &opts.writeout_stage, "stage",
+ OPT_STRING(0, "orphan", &opts.new_orphan_branch, "new branch", "new unparented branch"),
+ OPT_SET_INT('2', "ours", &opts.writeout_stage, "checkout our version for unmerged files",
2),
- OPT_SET_INT('3', "theirs", &opts.writeout_stage, "stage",
+ OPT_SET_INT('3', "theirs", &opts.writeout_stage, "checkout their version for unmerged files",
3),
- OPT_BOOLEAN('f', "force", &opts.force, "force"),
- OPT_BOOLEAN('m', "merge", &opts.merge, "merge"),
+ 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_STRING(0, "conflict", &conflict_style, "style",
"conflict style (merge or diff3)"),
OPT_BOOLEAN('p', "patch", &patch_mode, "select hunks interactively"),
memset(&opts, 0, sizeof(opts));
memset(&new, 0, sizeof(new));
- git_config(git_checkout_config, NULL);
+ gitmodules_config();
+ git_config(git_checkout_config, &opts);
opts.track = BRANCH_TRACK_UNSPECIFIED;
argc = parse_options(argc, argv, prefix, options, checkout_usage,
PARSE_OPT_KEEP_DASHDASH);
+ /* 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");
+
+ /* 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 = argv0 + 1;
}
+ if (opts.new_orphan_branch) {
+ if (opts.new_branch)
+ die("--orphan and -b|-B are mutually exclusive");
+ if (opts.track > 0)
+ die("--orphan cannot be used with -t");
+ opts.new_branch = opts.new_orphan_branch;
+ }
+
if (conflict_style) {
opts.merge = 1; /* implied */
git_xmerge_config("merge.conflictstyle", conflict_style, NULL);
* 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
+ * 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.
+ * 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 (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))
- die("git checkout: branch %s already exists", 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);
+ }
strbuf_release(&buf);
}