Give the user a choice in this case. If they want to detach, they can go
with '--detach --to ...', or they could switch branch of the checkout
that's holding the ref in question. Or they could just create a new
branch with '-b xxx --to yyy'
Signed-off-by: Nguyễn Thái Ngọc Duy <pclo...@gmail.com>
---
Documentation/config.txt | 3 ++
advice.c | 2 ++
advice.h | 1 +
builtin/checkout.c | 73 ++++++++++++++++++++++++++++--------------------
t/t2025-checkout-to.sh | 16 +++++------
5 files changed, 56 insertions(+), 39 deletions(-)
diff --git a/Documentation/config.txt b/Documentation/config.txt
index 57999fa..4a41202 100644
--- a/Documentation/config.txt
+++ b/Documentation/config.txt
@@ -201,6 +201,9 @@ advice.*::
rmHints::
In case of failure in the output of linkgit:git-rm[1],
show directions on how to proceed from the current state.
+ checkoutTo::
+ In case of failure in the output of "git checkout --to",
+ show directions on how to proceed from the current state.
--
core.fileMode::
diff --git a/advice.c b/advice.c
index 9b42033..b1fb524 100644
--- a/advice.c
+++ b/advice.c
@@ -15,6 +15,7 @@ int advice_detached_head = 1;
int advice_set_upstream_failure = 1;
int advice_object_name_warning = 1;
int advice_rm_hints = 1;
+int advice_checkout_to = 1;
static struct {
const char *name;
@@ -35,6 +36,7 @@ static struct {
{ "setupstreamfailure", &advice_set_upstream_failure },
{ "objectnamewarning", &advice_object_name_warning },
{ "rmhints", &advice_rm_hints },
+ { "checkoutto", &advice_checkout_to },
/* make this an alias for backward compatibility */
{ "pushnonfastforward", &advice_push_update_rejected }
diff --git a/advice.h b/advice.h
index 5ecc6c1..a288219 100644
--- a/advice.h
+++ b/advice.h
@@ -18,6 +18,7 @@ extern int advice_detached_head;
extern int advice_set_upstream_failure;
extern int advice_object_name_warning;
extern int advice_rm_hints;
+extern int advice_checkout_to;
int git_default_advice_config(const char *var, const char *value);
__attribute__((format (printf, 1, 2)))
diff --git a/builtin/checkout.c b/builtin/checkout.c
index c83f476..d35245a 100644
--- a/builtin/checkout.c
+++ b/builtin/checkout.c
@@ -1006,31 +1006,52 @@ static const char *unique_tracking_name(const char
*name, unsigned char *sha1)
return NULL;
}
-static int check_linked_checkout(struct branch_info *new,
- const char *name, const char *path)
+static void check_linked_checkout(struct branch_info *new, const char *id)
{
struct strbuf sb = STRBUF_INIT;
+ struct strbuf path = STRBUF_INIT;
+ struct strbuf gitdir = STRBUF_INIT;
const char *start, *end;
- if (strbuf_read_file(&sb, path, 0) < 0 ||
- !skip_prefix(sb.buf, "ref:", &start)) {
- strbuf_release(&sb);
- return 0;
- }
+ if (id)
+ strbuf_addf(&path, "%s/repos/%s/HEAD", get_git_common_dir(),
id);
+ else
+ strbuf_addf(&path, "%s/HEAD", get_git_common_dir());
+
+ if (strbuf_read_file(&sb, path.buf, 0) <= 0 ||
+ !skip_prefix(sb.buf, "ref:", &start))
+ goto done;
while (isspace(*start))
start++;
end = start;
while (*end && !isspace(*end))
end++;
- if (!strncmp(start, new->path, end - start) &&
- new->path[end - start] == '\0') {
- strbuf_release(&sb);
- new->path = NULL; /* detach */
- new->checkout = xstrdup(name); /* reason */
- return 1;
- }
+ if (strncmp(start, new->path, end - start) ||
+ new->path[end - start] != '\0')
+ goto done;
+ if (id) {
+ strbuf_reset(&path);
+ strbuf_addf(&path, "%s/repos/%s/gitdir",
+ get_git_common_dir(), id);
+ if (strbuf_read_file(&gitdir, path.buf, 0) <= 0)
+ goto done;
+ while (gitdir.len && (gitdir.buf[gitdir.len - 1] == '\n' ||
+ gitdir.buf[gitdir.len - 1] == '\r'))
+ gitdir.buf[--gitdir.len] = '\0';
+ } else
+ strbuf_addstr(&gitdir, get_git_common_dir());
+ if (advice_checkout_to)
+ die(_("%s is already checked out at %s.\n"
+ "Either use --detach or -b together with --to "
+ "or switch branch in the the other checkout."),
+ new->path, gitdir.buf);
+ else
+ die(_("%s is already checked out at %s."),
+ new->path, gitdir.buf);
+done:
+ strbuf_release(&path);
strbuf_release(&sb);
- return 0;
+ strbuf_release(&gitdir);
}
static void check_linked_checkouts(struct branch_info *new)
@@ -1045,27 +1066,17 @@ static void check_linked_checkouts(struct branch_info
*new)
return;
}
- strbuf_reset(&path);
- strbuf_addf(&path, "%s/HEAD", get_git_common_dir());
/*
* $GIT_COMMON_DIR/HEAD is practically outside
* $GIT_DIR so resolve_ref_unsafe() won't work (it
* uses git_path). Parse the ref ourselves.
*/
- if (check_linked_checkout(new, "", path.buf)) {
- strbuf_release(&path);
- closedir(dir);
- return;
- }
+ check_linked_checkout(new, NULL);
while ((d = readdir(dir)) != NULL) {
if (!strcmp(d->d_name, ".") || !strcmp(d->d_name, ".."))
continue;
- strbuf_reset(&path);
- strbuf_addf(&path, "%s/repos/%s/HEAD",
- get_git_common_dir(), d->d_name);
- if (check_linked_checkout(new, d->d_name, path.buf))
- break;
+ check_linked_checkout(new, d->d_name);
}
strbuf_release(&path);
closedir(dir);
@@ -1076,7 +1087,8 @@ static int parse_branchname_arg(int argc, const char
**argv,
struct branch_info *new,
struct tree **source_tree,
unsigned char rev[20],
- const char **new_branch)
+ const char **new_branch,
+ int force_detach)
{
int argcount = 0;
unsigned char branch_rev[20];
@@ -1198,7 +1210,7 @@ static int parse_branchname_arg(int argc, const char
**argv,
else
new->path = NULL; /* not an existing branch */
- if (new->path) {
+ if (new->path && !force_detach && !*new_branch) {
unsigned char sha1[20];
int flag;
char *head_ref = resolve_refdup("HEAD", sha1, 0, &flag);
@@ -1416,7 +1428,8 @@ int cmd_checkout(int argc, const char **argv, const char
*prefix)
!opts.new_branch;
int n = parse_branchname_arg(argc, argv, dwim_ok,
&new, &opts.source_tree,
- rev, &opts.new_branch);
+ rev, &opts.new_branch,
+ opts.force_detach);
argv += n;
argc -= n;
}
diff --git a/t/t2025-checkout-to.sh b/t/t2025-checkout-to.sh
index b0d97a0..c6601a4 100755
--- a/t/t2025-checkout-to.sh
+++ b/t/t2025-checkout-to.sh
@@ -14,7 +14,7 @@ test_expect_success 'checkout --to not updating paths' '
test_expect_success 'checkout --to a new worktree' '
git rev-parse HEAD >expect &&
- git checkout --to here master &&
+ git checkout --detach --to here master &&
(
cd here &&
test_cmp ../init.t init.t &&
@@ -28,7 +28,7 @@ test_expect_success 'checkout --to a new worktree' '
test_expect_success 'checkout --to from a linked checkout' '
(
cd here &&
- git checkout --to nested-here master
+ git checkout --detach --to nested-here master
cd nested-here &&
git fsck
)
@@ -46,19 +46,17 @@ test_expect_success 'checkout --to a new worktree creating
new branch' '
)
'
-test_expect_success 'detach if the same branch is already checked out' '
+test_expect_success 'die the same branch is already checked out' '
(
cd here &&
- git checkout newmaster &&
- test_must_fail git symbolic-ref HEAD
+ test_must_fail git checkout newmaster
)
'
-test_expect_success 'not detach on re-checking out current branch' '
+test_expect_success 'not die on re-checking out current branch' '
(
cd there &&
- git checkout newmaster &&
- git symbolic-ref HEAD
+ git checkout newmaster
)
'
@@ -66,7 +64,7 @@ test_expect_success 'checkout --to from a bare repo' '
(
git clone --bare . bare &&
cd bare &&
- git checkout --to ../there2 master
+ git checkout --to ../there2 -b bare-master master
)
'
--
1.9.1.346.ga2b5940
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