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-rw-r--r--builtin/checkout.c274
1 files changed, 158 insertions, 116 deletions
diff --git a/builtin/checkout.c b/builtin/checkout.c
index d287ee6..781295b 100644
--- a/builtin/checkout.c
+++ b/builtin/checkout.c
@@ -28,23 +28,25 @@ static const char * const checkout_usage[] = {
};
struct checkout_opts {
+ int patch_mode;
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;
-
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;
+
+ int branch_exists;
+ const char *prefix;
+ const char **pathspec;
+ struct tree *source_tree;
};
static int post_checkout_hook(struct commit *old, struct commit *new,
@@ -215,8 +217,8 @@ static int checkout_merged(int pos, struct checkout *state)
return status;
}
-static int checkout_paths(struct tree *source_tree, const char **pathspec,
- const char *prefix, struct checkout_opts *opts)
+static int checkout_paths(const struct checkout_opts *opts,
+ const char *revision)
{
int pos;
struct checkout state;
@@ -228,37 +230,65 @@ static int checkout_paths(struct tree *source_tree, const char **pathspec,
int stage = opts->writeout_stage;
int merge = opts->merge;
int newfd;
- struct lock_file *lock_file = xcalloc(1, sizeof(struct lock_file));
+ struct lock_file *lock_file;
+
+ if (opts->track != BRANCH_TRACK_UNSPECIFIED)
+ die(_("'%s' cannot be used with updating paths"), "--track");
+
+ if (opts->new_branch_log)
+ die(_("'%s' cannot be used with updating paths"), "-l");
+
+ if (opts->force && opts->patch_mode)
+ die(_("'%s' cannot be used with updating paths"), "-f");
+
+ if (opts->force_detach)
+ die(_("'%s' cannot be used with updating paths"), "--detach");
+
+ if (opts->merge && opts->patch_mode)
+ die(_("'%s' cannot be used with %s"), "--merge", "--patch");
+
+ if (opts->force && opts->merge)
+ die(_("'%s' cannot be used with %s"), "-f", "-m");
+
+ if (opts->new_branch)
+ die(_("Cannot update paths and switch to branch '%s' at the same time."),
+ opts->new_branch);
+
+ if (opts->patch_mode)
+ return run_add_interactive(revision, "--patch=checkout",
+ opts->pathspec);
+
+ lock_file = xcalloc(1, sizeof(struct lock_file));
newfd = hold_locked_index(lock_file, 1);
- if (read_cache_preload(pathspec) < 0)
+ if (read_cache_preload(opts->pathspec) < 0)
return error(_("corrupt index file"));
- if (source_tree)
- read_tree_some(source_tree, pathspec);
+ if (opts->source_tree)
+ read_tree_some(opts->source_tree, opts->pathspec);
- for (pos = 0; pathspec[pos]; pos++)
+ for (pos = 0; opts->pathspec[pos]; pos++)
;
ps_matched = xcalloc(1, pos);
for (pos = 0; pos < active_nr; pos++) {
struct cache_entry *ce = active_cache[pos];
- if (source_tree && !(ce->ce_flags & CE_UPDATE))
+ if (opts->source_tree && !(ce->ce_flags & CE_UPDATE))
continue;
- match_pathspec(pathspec, ce->name, ce_namelen(ce), 0, ps_matched);
+ match_pathspec(opts->pathspec, ce->name, ce_namelen(ce), 0, ps_matched);
}
- if (report_path_error(ps_matched, pathspec, prefix))
+ if (report_path_error(ps_matched, opts->pathspec, opts->prefix))
return 1;
/* "checkout -m path" to recreate conflicted state */
if (opts->merge)
- unmerge_cache(pathspec);
+ unmerge_cache(opts->pathspec);
/* Any unmerged paths? */
for (pos = 0; pos < active_nr; pos++) {
struct cache_entry *ce = active_cache[pos];
- if (match_pathspec(pathspec, ce->name, ce_namelen(ce), 0, NULL)) {
+ if (match_pathspec(opts->pathspec, ce->name, ce_namelen(ce), 0, NULL)) {
if (!ce_stage(ce))
continue;
if (opts->force) {
@@ -283,9 +313,9 @@ 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))
+ if (opts->source_tree && !(ce->ce_flags & CE_UPDATE))
continue;
- if (match_pathspec(pathspec, ce->name, ce_namelen(ce), 0, NULL)) {
+ if (match_pathspec(opts->pathspec, ce->name, ce_namelen(ce), 0, NULL)) {
if (!ce_stage(ce)) {
errs |= checkout_entry(ce, &state, NULL);
continue;
@@ -309,7 +339,8 @@ static int checkout_paths(struct tree *source_tree, const char **pathspec,
return errs;
}
-static void show_local_changes(struct object *head, struct diff_options *opts)
+static void show_local_changes(struct object *head,
+ const struct diff_options *opts)
{
struct rev_info rev;
/* I think we want full paths, even if we're in a subdirectory. */
@@ -331,7 +362,8 @@ static void describe_detached_head(const char *msg, struct commit *commit)
strbuf_release(&sb);
}
-static int reset_tree(struct tree *tree, struct checkout_opts *o, int worktree)
+static int reset_tree(struct tree *tree, const struct checkout_opts *o,
+ int worktree, int *writeout_error)
{
struct unpack_trees_options opts;
struct tree_desc tree_desc;
@@ -350,7 +382,7 @@ static int reset_tree(struct tree *tree, struct checkout_opts *o, int worktree)
init_tree_desc(&tree_desc, tree->buffer, tree->size);
switch (unpack_trees(1, &tree_desc, &opts)) {
case -2:
- o->writeout_error = 1;
+ *writeout_error = 1;
/*
* We return 0 nevertheless, as the index is all right
* and more importantly we have made best efforts to
@@ -381,8 +413,10 @@ static void setup_branch_path(struct branch_info *branch)
branch->path = strbuf_detach(&buf, NULL);
}
-static int merge_working_tree(struct checkout_opts *opts,
- struct branch_info *old, struct branch_info *new)
+static int merge_working_tree(const struct checkout_opts *opts,
+ struct branch_info *old,
+ struct branch_info *new,
+ int *writeout_error)
{
int ret;
struct lock_file *lock_file = xcalloc(1, sizeof(struct lock_file));
@@ -393,7 +427,7 @@ static int merge_working_tree(struct checkout_opts *opts,
resolve_undo_clear();
if (opts->force) {
- ret = reset_tree(new->commit->tree, opts, 1);
+ ret = reset_tree(new->commit->tree, opts, 1, writeout_error);
if (ret)
return ret;
} else {
@@ -479,7 +513,8 @@ static int merge_working_tree(struct checkout_opts *opts,
o.verbosity = 0;
work = write_tree_from_memory(&o);
- ret = reset_tree(new->commit->tree, opts, 1);
+ ret = reset_tree(new->commit->tree, opts, 1,
+ writeout_error);
if (ret)
return ret;
o.ancestor = old->name;
@@ -487,7 +522,8 @@ static int merge_working_tree(struct checkout_opts *opts,
o.branch2 = "local";
merge_trees(&o, new->commit->tree, work,
old->commit->tree, &result);
- ret = reset_tree(new->commit->tree, opts, 0);
+ ret = reset_tree(new->commit->tree, opts, 0,
+ writeout_error);
if (ret)
return ret;
}
@@ -514,7 +550,7 @@ static void report_tracking(struct branch_info *new)
strbuf_release(&sb);
}
-static void update_refs_for_switch(struct checkout_opts *opts,
+static void update_refs_for_switch(const struct checkout_opts *opts,
struct branch_info *old,
struct branch_info *new)
{
@@ -701,13 +737,14 @@ static void orphaned_commit_warning(struct commit *old, struct commit *new)
free(refs.objects);
}
-static int switch_branches(struct checkout_opts *opts, struct branch_info *new)
+static int switch_branches(const 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;
+ int flag, writeout_error = 0;
memset(&old, 0, sizeof(old));
old.path = path_to_free = resolve_refdup("HEAD", rev, 0, &flag);
old.commit = lookup_commit_reference_gently(rev, 1);
@@ -725,7 +762,7 @@ static int switch_branches(struct checkout_opts *opts, struct branch_info *new)
parse_commit(new->commit);
}
- ret = merge_working_tree(opts, &old, new);
+ ret = merge_working_tree(opts, &old, new, &writeout_error);
if (ret) {
free(path_to_free);
return ret;
@@ -738,7 +775,7 @@ static int switch_branches(struct checkout_opts *opts, struct branch_info *new)
ret = post_checkout_hook(old.commit, new->commit, 1);
free(path_to_free);
- return ret || opts->writeout_error;
+ return ret || writeout_error;
}
static int git_checkout_config(const char *var, const char *value, void *cb)
@@ -755,12 +792,6 @@ static int git_checkout_config(const char *var, const char *value, void *cb)
return git_xmerge_config(var, value, NULL);
}
-static int interactive_checkout(const char *revision, const char **pathspec,
- struct checkout_opts *opts)
-{
- return run_add_interactive(revision, "--patch=checkout", pathspec);
-}
-
struct tracking_name_data {
const char *name;
char *remote;
@@ -910,7 +941,7 @@ static int parse_branchname_arg(int argc, const char **argv,
return argcount;
}
-static int switch_unborn_to_new_branch(struct checkout_opts *opts)
+static int switch_unborn_to_new_branch(const struct checkout_opts *opts)
{
int status;
struct strbuf branch_ref = STRBUF_INIT;
@@ -923,14 +954,56 @@ static int switch_unborn_to_new_branch(struct checkout_opts *opts)
return status;
}
+static int checkout_branch(struct checkout_opts *opts,
+ struct branch_info *new)
+{
+ if (opts->pathspec)
+ die(_("paths cannot be used with switching branches"));
+
+ if (opts->patch_mode)
+ die(_("'%s' cannot be used with switching branches"),
+ "--patch");
+
+ if (opts->writeout_stage)
+ die(_("'%s' cannot be used with switching branches"),
+ "--ours/--theirs");
+
+ if (opts->force && opts->merge)
+ die(_("'%s' cannot be used with '%s'"), "-f", "-m");
+
+ if (opts->force_detach && opts->new_branch)
+ die(_("'%s' cannot be used with '%s'"),
+ "--detach", "-b/-B/--orphan");
+
+ if (opts->new_orphan_branch) {
+ if (opts->track != BRANCH_TRACK_UNSPECIFIED)
+ die(_("'%s' cannot be used with '%s'"), "--orphan", "-t");
+ } else if (opts->force_detach) {
+ if (opts->track != BRANCH_TRACK_UNSPECIFIED)
+ die(_("'%s' cannot be used with '%s'"), "--detach", "-t");
+ } else if (opts->track == BRANCH_TRACK_UNSPECIFIED)
+ opts->track = git_branch_track;
+
+ if (new->name && !new->commit)
+ die(_("Cannot switch branch to a non-commit '%s'"),
+ new->name);
+
+ if (!new->commit && opts->new_branch) {
+ 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);
+}
+
int cmd_checkout(int argc, const char **argv, const char *prefix)
{
struct checkout_opts opts;
- unsigned char rev[20];
struct branch_info new;
- 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, N_("suppress progress reporting")),
@@ -952,7 +1025,7 @@ int cmd_checkout(int argc, const char **argv, const char *prefix)
OPT_BOOLEAN(0, "overwrite-ignore", &opts.overwrite_ignore, N_("update ignored files (default)")),
OPT_STRING(0, "conflict", &conflict_style, N_("style"),
N_("conflict style (merge or diff3)")),
- OPT_BOOLEAN('p', "patch", &patch_mode, N_("select hunks interactively")),
+ OPT_BOOLEAN('p', "patch", &opts.patch_mode, N_("select hunks interactively")),
{ OPTION_BOOLEAN, 0, "guess", &dwim_new_local_branch, NULL,
N_("second guess 'git checkout no-such-branch'"),
PARSE_OPT_NOARG | PARSE_OPT_HIDDEN },
@@ -962,6 +1035,7 @@ int cmd_checkout(int argc, const char **argv, const char *prefix)
memset(&opts, 0, sizeof(opts));
memset(&new, 0, sizeof(new));
opts.overwrite_ignore = 1;
+ opts.prefix = prefix;
gitmodules_config();
git_config(git_checkout_config, &opts);
@@ -971,26 +1045,27 @@ int cmd_checkout(int argc, const char **argv, const char *prefix)
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"));
+ if (conflict_style) {
+ opts.merge = 1; /* implied */
+ git_xmerge_config("merge.conflictstyle", conflict_style, NULL);
+ }
+
+ if ((!!opts.new_branch + !!opts.new_branch_force + !!opts.new_orphan_branch) > 1)
+ die(_("-b, -B and --orphan are mutually exclusive"));
- /* copy -B over to -b, so that we can just check the latter */
+ /*
+ * From here on, new_branch will contain the branch to be checked out,
+ * and new_branch_force and new_orphan_branch will tell us which one of
+ * -b/-B/--orphan is being used.
+ */
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
- || 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"));
+ if (opts.new_orphan_branch)
+ opts.new_branch = opts.new_orphan_branch;
- /* --track without -b should DWIM */
- if (0 < opts.track && !opts.new_branch) {
+ /* --track without -b/-B/--orphan should DWIM */
+ if (opts.track != BRANCH_TRACK_UNSPECIFIED && !opts.new_branch) {
const char *argv0 = argv[0];
if (!argc || !strcmp(argv0, "--"))
die (_("--track needs a branch name"));
@@ -1004,22 +1079,6 @@ int cmd_checkout(int argc, const char **argv, const char *prefix)
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);
- }
-
- if (opts.force && opts.merge)
- die(_("git checkout: -f and -m are incompatible"));
-
/*
* Extract branch name from command line arguments, so
* all that is left is pathspecs.
@@ -1034,73 +1093,56 @@ int cmd_checkout(int argc, const char **argv, const char *prefix)
* remote branches, erroring out for invalid or ambiguous cases.
*/
if (argc) {
+ unsigned char rev[20];
int dwim_ok =
- !patch_mode &&
+ !opts.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);
+ &new, &opts.source_tree,
+ rev, &opts.new_branch);
argv += n;
argc -= n;
}
- if (opts.track == BRANCH_TRACK_UNSPECIFIED)
- opts.track = git_branch_track;
-
if (argc) {
- const char **pathspec = get_pathspec(prefix, argv);
+ opts.pathspec = get_pathspec(prefix, argv);
- if (!pathspec)
+ if (!opts.pathspec)
die(_("invalid path specification"));
- if (patch_mode)
- return interactive_checkout(new.name, pathspec, &opts);
-
- /* 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]);
- } else {
- die(_("git checkout: updating paths is incompatible with switching branches."));
- }
- }
+ /*
+ * Try to give more helpful suggestion.
+ * new_branch && argc > 1 will be caught later.
+ */
+ if (opts.new_branch && argc == 1)
+ die(_("Cannot update paths and switch to branch '%s' at the same time.\n"
+ "Did you intend to checkout '%s' which can not be resolved as commit?"),
+ opts.new_branch, argv[0]);
if (opts.force_detach)
- die(_("git checkout: --detach does not take a path argument"));
+ die(_("git checkout: --detach does not take a path argument '%s'"),
+ argv[0]);
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."));
-
- return checkout_paths(source_tree, pathspec, prefix, &opts);
+ die(_("git checkout: --ours/--theirs, --force and --merge are incompatible when\n"
+ "checking out of the index."));
}
- if (patch_mode)
- return interactive_checkout(new.name, NULL, &opts);
-
if (opts.new_branch) {
struct strbuf buf = STRBUF_INIT;
- opts.branch_exists = validate_new_branchname(opts.new_branch, &buf,
- !!opts.new_branch_force,
- !!opts.new_branch_force);
+ 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."));
- }
- if (opts.writeout_stage)
- die(_("--ours/--theirs is incompatible with switching branches."));
-
- if (!new.commit && opts.new_branch) {
- 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);
+ if (opts.patch_mode || opts.pathspec)
+ return checkout_paths(&opts, new.name);
+ else
+ return checkout_branch(&opts, &new);
}