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ui-snapshot: improve extraction of revision from snapshot name

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The modified get_ref_from_filename() supports the following snapshot
formats:
* $REV.$EXT
* $REPO[-_]*v?$REV.$EXT

This implies that the following urls will retrieve the expected revision:
* http://hjemli.net/git/cgit/snapshot/v0.8.1.tar.gz
* http://hjemli.net/git/cgit/snapshot/0.8.1.tar.gz
* http://hjemli.net/git/cgit/snapshot/cgit-0.8.1.tar.gz
* http://hjemli.net/git/cgit/snapshot/cgit-140012d7a8.tar.gz

Signed-off-by: Lars Hjemli <hjemli@gmail.com>
This commit is contained in:
Lars Hjemli 2008-12-01 19:13:44 +01:00
parent 314d9ea5a3
commit 4b4f8d1256
1 changed files with 37 additions and 43 deletions
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80
ui-snapshot.c
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@ -114,52 +114,46 @@ static int make_snapshot(const struct cgit_snapshot_format *format,
return 0;
}
char *dwim_filename = NULL;
const char *dwim_refname = NULL;
static int ref_cb(const char *refname, const unsigned char *sha1, int flags,
void *cb_data)
{
const char *r = refname;
while (r && *r) {
fprintf(stderr, " cmp %s with %s:", dwim_filename, r);
if (!strcmp(dwim_filename, r)) {
fprintf(stderr, "MATCH!\n");
dwim_refname = refname;
return 1;
}
fprintf(stderr, "no match\n");
if (isdigit(*r))
break;
r++;
}
return 0;
}
/* Try to guess the requested revision by combining repo name and tag name
* and comparing this to the requested snapshot name. E.g. the requested
* snapshot is "cgit-0.7.2.tar.gz" while repo name is "cgit" and tag name
* is "v0.7.2". First, the reponame is stripped off, leaving "-0.7.2.tar.gz".
* Next, any '-' and '_' characters are stripped, leaving "0.7.2.tar.gz".
* Finally, the requested format suffix is removed and we end up with "0.7.2".
* Then we test each tag against this dwimmed filename, and for each tag
* we even try to remove any leading characters which are non-digits. I.e.
* we first compare with "v0.7.2", then with "0.7.2" and we've got a match.
/* Try to guess the requested revision from the requested snapshot name.
* First the format extension is stripped, e.g. "cgit-0.7.2.tar.gz" become
* "cgit-0.7.2". If this is a valid commit object name we've got a winner.
* Otherwise, if the snapshot name has a prefix matching the result from
* repo_basename(), we strip the basename and any following '-' and '_'
* characters ("cgit-0.7.2" -> "0.7.2") and check the resulting name once
* more. If this still isn't a valid commit object name, we check if pre-
* pending a 'v' to the remaining snapshot name ("0.7.2" -> "v0.7.2") gives
* us something valid.
*/
static const char *get_ref_from_filename(const char *url, const char *filename,
const struct cgit_snapshot_format *fmt)
const struct cgit_snapshot_format *format)
{
const char *reponame = cgit_repobasename(url);
fprintf(stderr, "reponame=%s, filename=%s\n", reponame, filename);
if (prefixcmp(filename, reponame))
return NULL;
filename += strlen(reponame);
while (filename && (*filename == '-' || *filename == '_'))
filename++;
dwim_filename = xstrdup(filename);
dwim_filename[strlen(filename) - strlen(fmt->suffix)] = '\0';
for_each_tag_ref(ref_cb, NULL);
return dwim_refname;
const char *reponame;
unsigned char sha1[20];
char *snapshot;
snapshot = xstrdup(filename);
snapshot[strlen(snapshot) - strlen(format->suffix)] = '\0';
fprintf(stderr, "snapshot=%s\n", snapshot);
if (get_sha1(snapshot, sha1) == 0)
return snapshot;
reponame = cgit_repobasename(url);
fprintf(stderr, "reponame=%s\n", reponame);
if (prefixcmp(snapshot, reponame) == 0) {
snapshot += strlen(reponame);
while (snapshot && (*snapshot == '-' || *snapshot == '_'))
snapshot++;
}
if (get_sha1(snapshot, sha1) == 0)
return snapshot;
snapshot = fmt("v%s", snapshot);
if (get_sha1(snapshot, sha1) == 0)
return snapshot;
return NULL;
}
void cgit_print_snapshot(const char *head, const char *hex,