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clone: print advice on checking out detached HEAD 

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Nguyễn Thái Ngọc Duy 2012-01-16 16:46:16 +07:00 committed by Junio C Hamano
parent 5a7d5b683f
commit 2857093ba1
4 changed files with 20 additions and 16 deletions
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14
advice.c
View File

@ -64,3 +64,17 @@ void NORETURN die_resolve_conflict(const char *me)
error_resolve_conflict(me);
die("Exiting because of an unresolved conflict.");
}
void detach_advice(const char *new_name)
{
const char fmt[] =
"Note: checking out '%s'.\n\n"
"You are in 'detached HEAD' state. You can look around, make experimental\n"
"changes and commit them, and you can discard any commits you make in this\n"
"state without impacting any branches by performing another checkout.\n\n"
"If you want to create a new branch to retain commits you create, you may\n"
"do so (now or later) by using -b with the checkout command again. Example:\n\n"
" git checkout -b new_branch_name\n\n";
fprintf(stderr, fmt, new_name);
}

1
advice.h
View File

@ -14,5 +14,6 @@ int git_default_advice_config(const char *var, const char *value);
void advise(const char *advice, ...);
int error_resolve_conflict(const char *me);
extern void NORETURN die_resolve_conflict(const char *me);
void detach_advice(const char *new_name);
#endif /* ADVICE_H */

16
builtin/checkout.c
View File

@ -514,20 +514,6 @@ static void report_tracking(struct branch_info *new)
strbuf_release(&sb);
}
static void detach_advice(const char *old_path, const char *new_name)
{
const char fmt[] =
"Note: checking out '%s'.\n\n"
"You are in 'detached HEAD' state. You can look around, make experimental\n"
"changes and commit them, and you can discard any commits you make in this\n"
"state without impacting any branches by performing another checkout.\n\n"
"If you want to create a new branch to retain commits you create, you may\n"
"do so (now or later) by using -b with the checkout command again. Example:\n\n"
" git checkout -b new_branch_name\n\n";
fprintf(stderr, fmt, new_name);
}
static void update_refs_for_switch(struct checkout_opts *opts,
struct branch_info *old,
struct branch_info *new)
@ -575,7 +561,7 @@ static void update_refs_for_switch(struct checkout_opts *opts,
REF_NODEREF, DIE_ON_ERR);
if (!opts->quiet) {
if (old->path && advice_detached_head)
detach_advice(old->path, new->name);
detach_advice(new->name);
describe_detached_head(_("HEAD is now at"), new->commit);
}
} else if (new->path) { /* Switch branches. */

5
builtin/clone.c
View File

@ -563,7 +563,10 @@ static int checkout(void)
"unable to checkout.\n"));
return 0;
}
if (strcmp(head, "HEAD")) {
if (!strcmp(head, "HEAD")) {
if (advice_detached_head)
detach_advice(sha1_to_hex(sha1));
} else {
if (prefixcmp(head, "refs/heads/"))
die(_("HEAD not found below refs/heads!"));
}