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Avoid ambiguities when prettifying snapshot names

Telusuri Sumber 
When composing snapshot file names for a tag with a prefix of the form
v[0-9] (resp. V[0-9]), the leading "v" (resp. "V") is stripped. This
leads to conflicts if a tag with the stripped name already exists or if
there are tags only differing in the capitalization of the leading "v".
Make sure we do not strip the "v" in these cases.

Reported-by: Juuso Lapinlampi <wub@partyvan.eu>
Signed-off-by: Lukas Fleischer <lfleischer@lfos.de>
This commit is contained in:
Lukas Fleischer 2016-05-24 18:15:18 +02:00 committed by Jason A. Donenfeld
orang tua 1e039ada85
melakukan 9984e7ab49
3 mengubah file dengan 32 tambahan dan 20 penghapusan
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24
ui-refs.c
Melihat File

@ -93,34 +93,28 @@ static void print_tag_header(void)
static void print_tag_downloads(const struct cgit_repo *repo, const char *ref)
{
const struct cgit_snapshot_format* f;
struct strbuf filename = STRBUF_INIT;
const char *basename;
int free_ref = 0;
struct strbuf filename = STRBUF_INIT;
size_t prefixlen;
if (!ref || strlen(ref) < 1)
return;
basename = cgit_repobasename(repo->url);
if (!starts_with(ref, basename)) {
if ((ref[0] == 'v' || ref[0] == 'V') && isdigit(ref[1]))
ref++;
if (isdigit(ref[0])) {
ref = fmtalloc("%s-%s", basename, ref);
free_ref = 1;
}
}
if (starts_with(ref, basename))
strbuf_addstr(&filename, ref);
else
cgit_compose_snapshot_prefix(&filename, basename, ref);
prefixlen = filename.len;
for (f = cgit_snapshot_formats; f->suffix; f++) {
if (!(repo->snapshots & f->bit))
continue;
strbuf_reset(&filename);
strbuf_addf(&filename, "%s%s", ref, f->suffix);
strbuf_setlen(&filename, prefixlen);
strbuf_addstr(&filename, f->suffix);
cgit_snapshot_link(filename.buf, NULL, NULL, NULL, NULL, filename.buf);
html("&nbsp;&nbsp;");
}
if (free_ref)
free((char *)ref);
strbuf_release(&filename);
}

26
ui-shared.c
Melihat File

@ -1069,18 +1069,34 @@ void cgit_print_filemode(unsigned short mode)
html_fileperm(mode);
}
void cgit_compose_snapshot_prefix(struct strbuf *filename, const char *base,
const char *ref)
{
unsigned char sha1[20];
/*
* Prettify snapshot names by stripping leading "v" or "V" if the tag
* name starts with {v,V}[0-9] and the prettify mapping is injective,
* i.e. each stripped tag can be inverted without ambiguities.
*/
if (get_sha1(fmt("refs/tags/%s", ref), sha1) == 0 &&
(ref[0] == 'v' || ref[0] == 'V') && isdigit(ref[1]) &&
((get_sha1(fmt("refs/tags/%s", ref + 1), sha1) == 0) +
(get_sha1(fmt("refs/tags/v%s", ref + 1), sha1) == 0) +
(get_sha1(fmt("refs/tags/V%s", ref + 1), sha1) == 0) == 1))
ref++;
strbuf_addf(filename, "%s-%s", base, ref);
}
void cgit_print_snapshot_links(const char *repo, const char *head,
const char *hex, int snapshots)
{
const struct cgit_snapshot_format* f;
struct strbuf filename = STRBUF_INIT;
size_t prefixlen;
unsigned char sha1[20];
if (get_sha1(fmt("refs/tags/%s", hex), sha1) == 0 &&
(hex[0] == 'v' || hex[0] == 'V') && isdigit(hex[1]))
hex++;
strbuf_addf(&filename, "%s-%s", cgit_repobasename(repo), hex);
cgit_compose_snapshot_prefix(&filename, cgit_repobasename(repo), hex);
prefixlen = filename.len;
for (f = cgit_snapshot_formats; f->suffix; f++) {
if (!(snapshots & f->bit))

2
ui-shared.h
Melihat File

@ -71,6 +71,8 @@ __attribute__((format (printf,3,4)))
extern void cgit_print_error_page(int code, const char *msg, const char *fmt, ...);
extern void cgit_print_pageheader(void);
extern void cgit_print_filemode(unsigned short mode);
extern void cgit_compose_snapshot_prefix(struct strbuf *filename,
const char *base, const char *ref);
extern void cgit_print_snapshot_links(const char *repo, const char *head,
const char *hex, int snapshots);
extern void cgit_add_hidden_formfields(int incl_head, int incl_search,