![[tokkee]](http://tokkee.org/images/avatar.png){kind=avatar}
diff --git a/builtin-checkout.c b/builtin-checkout.c
index 141a9e187302ddf707c2dc6f3796694a55081c61..cff01791592cc357f6bd98c80b61f4c081aae24e 100644 (file)
--- a/builtin-checkout.c
+++ b/builtin-checkout.c
#include "branch.h"
#include "diff.h"
#include "revision.h"
+#include "remote.h"
static const char * const checkout_usage[] = {
"git checkout [options] <branch>",
}
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;
static int read_tree_some(struct tree *tree, const char **pathspec)
{
- int newfd;
- struct lock_file *lock_file = xcalloc(1, sizeof(struct lock_file));
- newfd = hold_locked_index(lock_file, 1);
- read_cache();
-
- read_tree_recursive(tree, "", 0, 0, pathspec, update_some);
-
- if (write_cache(newfd, active_cache, active_nr) ||
- commit_locked_index(lock_file))
- die("unable to write new index file");
+ 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
return 0;
}
-static int checkout_paths(const char **pathspec)
+static int checkout_paths(struct tree *source_tree, const char **pathspec)
{
int pos;
struct checkout state;
unsigned char rev[20];
int flag;
struct commit *head;
+ int errs = 0;
+
+ int newfd;
+ struct lock_file *lock_file = xcalloc(1, sizeof(struct lock_file));
+
+ newfd = hold_locked_index(lock_file, 1);
+ read_cache();
+
+ if (source_tree)
+ read_tree_some(source_tree, pathspec);
for (pos = 0; pathspec[pos]; pos++)
;
if (report_path_error(ps_matched, pathspec, 0))
return 1;
+ /* Now we are committed to check them out */
memset(&state, 0, sizeof(state));
state.force = 1;
state.refresh_cache = 1;
for (pos = 0; pos < active_nr; pos++) {
struct cache_entry *ce = active_cache[pos];
if (pathspec_match(pathspec, NULL, ce->name, 0)) {
- checkout_entry(ce, &state, NULL);
+ errs |= checkout_entry(ce, &state, NULL);
}
}
+ if (write_cache(newfd, active_cache, active_nr) ||
+ commit_locked_index(lock_file))
+ die("unable to write new index file");
+
resolve_ref("HEAD", rev, 0, &flag);
head = lookup_commit_reference_gently(rev, 1);
- return post_checkout_hook(head, head, 0);
+ errs |= post_checkout_hook(head, head, 0);
+ return errs;
}
static void show_local_changes(struct object *head)
struct strbuf sb;
strbuf_init(&sb, 0);
parse_commit(commit);
- pretty_print_commit(CMIT_FMT_ONELINE, commit, &sb, 0, "", "", 0, 0);
+ pretty_print_commit(CMIT_FMT_ONELINE, commit, &sb, 0, NULL, NULL, 0, 0);
fprintf(stderr, "%s %s... %s\n", msg,
find_unique_abbrev(commit->object.sha1, DEFAULT_ABBREV), sb.buf);
strbuf_release(&sb);
}
-static int reset_to_new(struct tree *tree, int quiet)
-{
- struct unpack_trees_options opts;
- struct tree_desc tree_desc;
- memset(&opts, 0, sizeof(opts));
- opts.head_idx = -1;
- opts.update = 1;
- opts.reset = 1;
- opts.merge = 1;
- opts.fn = oneway_merge;
- opts.verbose_update = !quiet;
- parse_tree(tree);
- init_tree_desc(&tree_desc, tree->buffer, tree->size);
- if (unpack_trees(1, &tree_desc, &opts))
- return 128;
- return 0;
-}
+struct checkout_opts {
+ int quiet;
+ int merge;
+ int force;
+ int writeout_error;
+
+ char *new_branch;
+ int new_branch_log;
+ enum branch_track track;
+};
-static void reset_clean_to_new(struct tree *tree, int quiet)
+static int reset_tree(struct tree *tree, struct checkout_opts *o, int worktree)
{
struct unpack_trees_options opts;
struct tree_desc tree_desc;
+
memset(&opts, 0, sizeof(opts));
opts.head_idx = -1;
- opts.skip_unmerged = 1;
+ opts.update = worktree;
+ opts.skip_unmerged = !worktree;
opts.reset = 1;
opts.merge = 1;
opts.fn = oneway_merge;
- opts.verbose_update = !quiet;
+ opts.verbose_update = !o->quiet;
+ opts.src_index = &the_index;
+ opts.dst_index = &the_index;
parse_tree(tree);
init_tree_desc(&tree_desc, tree->buffer, tree->size);
- if (unpack_trees(1, &tree_desc, &opts))
- exit(128);
+ switch (unpack_trees(1, &tree_desc, &opts)) {
+ case -2:
+ o->writeout_error = 1;
+ /*
+ * We return 0 nevertheless, as the index is all right
+ * and more importantly we have made best efforts to
+ * update paths in the work tree, and we cannot revert
+ * them.
+ */
+ case 0:
+ return 0;
+ default:
+ return 128;
+ }
}
-struct checkout_opts {
- int quiet;
- int merge;
- int force;
-
- char *new_branch;
- int new_branch_log;
- int track;
-};
-
struct branch_info {
const char *name; /* The short name used */
const char *path; /* The full name of a real branch */
}
static int merge_working_tree(struct checkout_opts *opts,
- struct branch_info *old, struct branch_info *new,
- const char *prefix)
+ struct branch_info *old, struct branch_info *new)
{
int ret;
struct lock_file *lock_file = xcalloc(1, sizeof(struct lock_file));
read_cache();
if (opts->force) {
- ret = reset_to_new(new->commit->tree, opts->quiet);
+ ret = reset_tree(new->commit->tree, opts, 1);
if (ret)
return ret;
} else {
struct tree_desc trees[2];
struct tree *tree;
struct unpack_trees_options topts;
+
memset(&topts, 0, sizeof(topts));
topts.head_idx = -1;
+ topts.src_index = &the_index;
+ topts.dst_index = &the_index;
+
+ topts.msgs.not_uptodate_file = "You have local changes to '%s'; cannot switch branches.";
refresh_cache(REFRESH_QUIET);
if (unmerged_cache()) {
- ret = opts->merge ? -1 :
- error("you need to resolve your current index first");
- } else {
- topts.update = 1;
- topts.merge = 1;
- topts.gently = opts->merge;
- topts.fn = twoway_merge;
- topts.dir = xcalloc(1, sizeof(*topts.dir));
- topts.dir->show_ignored = 1;
- topts.dir->exclude_per_dir = ".gitignore";
- topts.prefix = prefix;
- tree = parse_tree_indirect(old->commit->object.sha1);
- init_tree_desc(&trees[0], tree->buffer, tree->size);
- tree = parse_tree_indirect(new->commit->object.sha1);
- init_tree_desc(&trees[1], tree->buffer, tree->size);
- ret = unpack_trees(2, trees, &topts);
+ error("you need to resolve your current index first");
+ return 1;
}
- if (ret) {
+
+ /* 2-way merge to the new branch */
+ topts.update = 1;
+ topts.merge = 1;
+ topts.gently = opts->merge;
+ topts.verbose_update = !opts->quiet;
+ topts.fn = twoway_merge;
+ topts.dir = xcalloc(1, sizeof(*topts.dir));
+ topts.dir->show_ignored = 1;
+ topts.dir->exclude_per_dir = ".gitignore";
+ tree = parse_tree_indirect(old->commit->object.sha1);
+ init_tree_desc(&trees[0], tree->buffer, tree->size);
+ tree = parse_tree_indirect(new->commit->object.sha1);
+ init_tree_desc(&trees[1], tree->buffer, tree->size);
+
+ ret = unpack_trees(2, trees, &topts);
+ if (ret == -1) {
/*
* Unpack couldn't do a trivial merge; either
* give up or do a real merge, depending on
* entries in the index.
*/
- add_files_to_cache(0, NULL, NULL);
+ add_files_to_cache(NULL, NULL, 0);
work = write_tree_from_memory();
- ret = reset_to_new(new->commit->tree, opts->quiet);
+ ret = reset_tree(new->commit->tree, opts, 1);
if (ret)
return ret;
merge_trees(new->commit->tree, work, old->commit->tree,
new->name, "local", &result);
- reset_clean_to_new(new->commit->tree, opts->quiet);
+ ret = reset_tree(new->commit->tree, opts, 0);
+ if (ret)
+ return ret;
}
}
return 0;
}
+static void report_tracking(struct branch_info *new)
+{
+ struct strbuf sb = STRBUF_INIT;
+ struct branch *branch = branch_get(new->name);
+
+ if (!format_tracking_info(branch, &sb))
+ return;
+ fputs(sb.buf, stdout);
+ strbuf_release(&sb);
+}
+
static void update_refs_for_switch(struct checkout_opts *opts,
struct branch_info *old,
struct branch_info *new)
}
remove_branch_state();
strbuf_release(&msg);
+ if (!opts->quiet && (new->path || !strcmp(new->name, "HEAD")))
+ report_tracking(new);
}
-static int switch_branches(struct checkout_opts *opts,
- struct branch_info *new, const char *prefix)
+static int switch_branches(struct checkout_opts *opts, struct branch_info *new)
{
int ret = 0;
struct branch_info old;
opts->force = 1;
}
- ret = merge_working_tree(opts, &old, new, prefix);
+ ret = merge_working_tree(opts, &old, new);
if (ret)
return ret;
update_refs_for_switch(opts, &old, new);
- free((char *)old.path);
- return post_checkout_hook(old.commit, new->commit, 1);
-}
-static int branch_track = 0;
-
-static int git_checkout_config(const char *var, const char *value)
-{
- if (!strcmp(var, "branch.autosetupmerge"))
- branch_track = git_config_bool(var, value);
-
- return git_default_config(var, value);
+ ret = post_checkout_hook(old.commit, new->commit, 1);
+ free((char *)old.path);
+ return ret || opts->writeout_error;
}
int cmd_checkout(int argc, const char **argv, const char *prefix)
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_BOOLEAN( 0 , "track", &opts.track, "track"),
+ OPT_SET_INT('t', "track", &opts.track, "track",
+ BRANCH_TRACK_EXPLICIT),
OPT_BOOLEAN('f', NULL, &opts.force, "force"),
OPT_BOOLEAN('m', NULL, &opts.merge, "merge"),
+ OPT_END(),
};
+ int has_dash_dash;
memset(&opts, 0, sizeof(opts));
memset(&new, 0, sizeof(new));
- git_config(git_checkout_config);
+ git_config(git_default_config, NULL);
- opts.track = branch_track;
+ opts.track = git_branch_track;
+
+ 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");
- argc = parse_options(argc, argv, options, checkout_usage, 0);
+ 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))
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 != 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);
+
+ if (!pathspec)
+ die("invalid path specification");
+
/* Checkout paths */
if (opts.new_branch || opts.force || opts.merge) {
if (argc == 1) {
}
}
- if (source_tree)
- read_tree_some(source_tree, pathspec);
- else
- read_cache();
- return checkout_paths(pathspec);
+ return checkout_paths(source_tree, pathspec);
}
if (new.name && !new.commit) {
die("Cannot switch branch to a non-commit.");
}
- return switch_branches(&opts, &new, prefix);
+ return switch_branches(&opts, &new);
}