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authorLars Hjemli <hjemli@gmail.com>2008-10-11 22:09:42 +0400
committerLars Hjemli <hjemli@gmail.com>2008-10-11 22:09:42 +0400
commited7ff095ca467cdc4c8a1a1459847d68e50c9b91 (patch)
tree4ed7425520cb76eff0a4e7756869620b2562b6c9 /ui-snapshot.c
parent5632ba35d133ee29d46c031cdd4b4a37097b8ca1 (diff)
ui-snapshot: add dwimmery
When downloading a snapshot, the snapshot name will often contain the repo name combined with a tag. This patch tries to exploit this so that the correct revision is downloaded even if no specific revision is specified. PS: this only occurs if neither 'h' nor 'id' is specified in the query- string. PPS: this also fixes a bug which occurs when trying to download a filename with an unsupported suffix: it used to try to print an error message to the user but failed since it didn't prepare the output properly. Signed-off-by: Lars Hjemli <hjemli@gmail.com>
Diffstat (limited to 'ui-snapshot.c')
-rw-r--r--ui-snapshot.c94
1 files changed, 81 insertions, 13 deletions
diff --git a/ui-snapshot.c b/ui-snapshot.c
index 7a597ff..9c4d086 100644
--- a/ui-snapshot.c
+++ b/ui-snapshot.c
@@ -64,6 +64,22 @@ const struct cgit_snapshot_format cgit_snapshot_formats[] = {
{}
};
+static const struct cgit_snapshot_format *get_format(const char *filename)
+{
+ const struct cgit_snapshot_format *fmt;
+ int fl, sl;
+
+ fl = strlen(filename);
+ for(fmt = cgit_snapshot_formats; fmt->suffix; fmt++) {
+ sl = strlen(fmt->suffix);
+ if (sl >= fl)
+ continue;
+ if (!strcmp(fmt->suffix, filename + fl - sl))
+ return fmt;
+ }
+ return NULL;
+}
+
static int make_snapshot(const struct cgit_snapshot_format *format,
const char *hex, const char *prefix,
const char *filename)
@@ -98,23 +114,75 @@ 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.
+ */
+static const char *get_ref_from_filename(const char *url, const char *filename,
+ const struct cgit_snapshot_format *fmt)
+{
+ 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;
+}
+
void cgit_print_snapshot(const char *head, const char *hex, const char *prefix,
- const char *filename, int snapshots)
+ const char *filename, int snapshots, int dwim)
{
const struct cgit_snapshot_format* f;
- int sl, fnl;
- fnl = strlen(filename);
- if (!hex)
- hex = head;
- for (f = cgit_snapshot_formats; f->suffix; f++) {
- if (!(snapshots & f->bit))
- continue;
- sl = strlen(f->suffix);
- if(fnl < sl || strcmp(&filename[fnl-sl], f->suffix))
- continue;
- make_snapshot(f, hex, prefix, filename);
+ 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;
}
- cgit_print_error(fmt("Unsupported snapshot format: %s", filename));
+
+ if (!hex && dwim)
+ hex = get_ref_from_filename(ctx.repo->url, filename, f);
+
+ if (!hex)
+ hex = head;
+
+ make_snapshot(f, hex, prefix, filename);
}