ui-snapshot.c


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generated by cgit v1.2.3-54-g00ecf (git 2.39.0) at 2025-03-17 03:47:37 +0000
 

p(format->mimetype);
	ctx.page.filename = xstrdup(filename);
	cgit_print_http_headers(&ctx);
	format->write_func(&args);
	return 0;
}

/* 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 *format)
{
	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,
			 const char *filename, int snapshots, int dwim)
{
	const struct cgit_snapshot_format* f;
	char *prefix = NULL;

	f = get_format(filename);
	if (!f) {
		ctx.page.mimetype = "text/html";
		cgit_print_http_headers(&ctx);
		cgit_print_docstart(&ctx);
		cgit_print_pageheader(&ctx);
		cgit_print_error(fmt("Unsupported snapshot format: %s", filename));
		cgit_print_docend();
		return;
	}

	if (!hex && dwim) {
		hex = get_ref_from_filename(ctx.repo->url, filename, f);
		if (hex == NULL) {
			html_status(404, "Not found", 0);
			return;
		}
		prefix = xstrdup(filename);
		prefix[strlen(filename) - strlen(f->suffix)] = '\0';
	}

	if (!hex)
		hex = head;

	if (!prefix)
		prefix = xstrdup(cgit_repobasename(ctx.repo->url));

	make_snapshot(f, hex, prefix, filename);
	free(prefix);
}