This is another departure from 'git checkout' syntax, which uses -- to
separate ref and pathspec. The observation is restore (or "git
checkout ,, <pathspec>") is most often used to restore some files from
the index. If this is correct, we can simplify it by taking a way the
ref, so that we can write
git restore some-file
without worrying about some-file being a ref and whether we need to do
git restore -- some-file
for safety. If the source of the restore comes from a tree, it will be
in the form of an option with value, e.g.
git restore --source=this-tree some-file
This is of course longer to type than using "--". But hopefully it
will not be used as often, and it is clearly easier to understand.
dwim_new_local_branch is no longer set (or unset) in cmd_restore_files()
because it's irrelevant because we don't really care about dwim-ing.
With accept_ref being unset, dwim can't happen.
Signed-off-by: Nguyễn Thái Ngọc Duy <pclo...@gmail.com>
---
builtin/checkout.c | 42 ++++++++++++++++++++++++++++++++++--------
1 file changed, 34 insertions(+), 8 deletions(-)
diff --git a/builtin/checkout.c b/builtin/checkout.c
index 11dd2ae44c..838343d6aa 100644
--- a/builtin/checkout.c
+++ b/builtin/checkout.c
@@ -38,7 +38,7 @@ static const char * const switch_branch_usage[] = {
};
static const char * const restore_files_usage[] = {
- N_("git restore [<options>] [<branch>] -- <file>..."),
+ N_("git restore [<options>] [--source=<branch>] <file>..."),
NULL,
};
@@ -57,6 +57,7 @@ struct checkout_opts {
int count_checkout_paths;
int overlay_mode;
int dwim_new_local_branch;
+ int accept_ref;
int accept_pathspec;
int switch_branch_doing_nothing_is_ok;
int only_merge_on_switching_branches;
@@ -72,6 +73,7 @@ struct checkout_opts {
int branch_exists;
const char *prefix;
struct pathspec pathspec;
+ const char *from_treeish;
struct tree *source_tree;
};
@@ -1324,6 +1326,7 @@ static int checkout_main(int argc, const char **argv,
const char *prefix,
{
struct branch_info new_branch_info;
int dwim_remotes_matched = 0;
+ int parseopt_flags = 0;
memset(&new_branch_info, 0, sizeof(new_branch_info));
opts->overwrite_ignore = 1;
@@ -1335,8 +1338,13 @@ static int checkout_main(int argc, const char **argv,
const char *prefix,
opts->track = BRANCH_TRACK_UNSPECIFIED;
- argc = parse_options(argc, argv, prefix, options, usagestr,
- PARSE_OPT_KEEP_DASHDASH);
+ if (!opts->accept_pathspec && !opts->accept_ref)
+ BUG("make up your mind, you need to take _something_");
+ if (opts->accept_pathspec && opts->accept_ref)
+ parseopt_flags = PARSE_OPT_KEEP_DASHDASH;
+
+ argc = parse_options(argc, argv, prefix, options,
+ usagestr, parseopt_flags);
if (opts->show_progress < 0) {
if (opts->quiet)
@@ -1393,7 +1401,7 @@ static int checkout_main(int argc, const char **argv,
const char *prefix,
* including "last branch" syntax and DWIM-ery for names of
* remote branches, erroring out for invalid or ambiguous cases.
*/
- if (argc) {
+ if (argc && opts->accept_ref) {
struct object_id rev;
int dwim_ok =
!opts->patch_mode &&
@@ -1405,6 +1413,18 @@ static int checkout_main(int argc, const char **argv,
const char *prefix,
&dwim_remotes_matched);
argv += n;
argc -= n;
+ } else if (!opts->accept_ref && opts->from_treeish) {
+ struct object_id rev;
+
+ if (get_oid_mb(opts->from_treeish, &rev))
+ die(_("could not resolve %s"), opts->from_treeish);
+
+ setup_new_branch_info_and_source_tree(&new_branch_info,
+ opts, &rev,
+ opts->from_treeish);
+
+ if (!opts->source_tree)
+ die(_("reference is not a tree: %s"),
opts->from_treeish);
}
if (argc) {
@@ -1488,6 +1508,7 @@ int cmd_checkout(int argc, const char **argv, const char
*prefix)
opts.dwim_new_local_branch = 1;
opts.switch_branch_doing_nothing_is_ok = 1;
opts.only_merge_on_switching_branches = 0;
+ opts.accept_ref = 1;
opts.accept_pathspec = 1;
opts.implicit_detach = 1;
@@ -1519,6 +1540,7 @@ int cmd_switch(int argc, const char **argv, const char
*prefix)
memset(&opts, 0, sizeof(opts));
opts.dwim_new_local_branch = 0;
+ opts.accept_ref = 1;
opts.accept_pathspec = 0;
opts.switch_branch_doing_nothing_is_ok = 0;
opts.only_merge_on_switching_branches = 1;
@@ -1537,15 +1559,19 @@ int cmd_switch(int argc, const char **argv, const char
*prefix)
int cmd_restore(int argc, const char **argv, const char *prefix)
{
struct checkout_opts opts;
- struct option *options = NULL;
+ struct option *options;
+ struct option restore_options[] = {
+ OPT_STRING('s', "source", &opts.from_treeish, "<tree-ish>",
+ N_("where the checkout from")),
+ OPT_END()
+ };
int ret;
memset(&opts, 0, sizeof(opts));
- opts.dwim_new_local_branch = 1;
- opts.switch_branch_doing_nothing_is_ok = 0;
+ opts.accept_ref = 0;
opts.accept_pathspec = 1;
- options = parse_options_dup(options);
+ options = parse_options_dup(restore_options);
options = add_common_options(&opts, options);
options = add_checkout_path_options(&opts, options);
--
2.21.0.rc1.337.gdf7f8d0522
