Keep clone files and oversized responses out of the cache

The dumb transport reads files that already sit on the disk, so a pack
copied into a slot cost that disk twice and the request a second write
of every byte. A snapshot took a slot whatever its size, so a visitor
naming distinct refs and ids could fill the cache root with archives.
`cache-max-slot-size`, 64 MB unless set, now serves a larger response
from the lock file and drops it, along with any expired copy it would
have replaced.

1 file changed, 10 insertions, 6 deletions

diff --git a/source/cmd.c b/source/cmd.c
index a19aa50..38fe596 100644
--- a/source/cmd.c
+++ b/source/cmd.c
@@ -208,19 +208,23 @@ static const struct cgit_cmd commands[] = {
 	{ .name = "tree", .fn = tree_fn, .want_repo = 1, .want_vpath = 1 },
 };
 
-const struct cgit_cmd *cgit_get_cmd(void)
+const struct cgit_cmd *cgit_find_cmd(const char *name)
 {
 	size_t i;
 
+	for (i = 0; i < ARRAY_SIZE(commands); i++)
+		if (!strcmp(name, commands[i].name))
+			return &commands[i];
+	return NULL;
+}
+
+const struct cgit_cmd *cgit_get_cmd(void)
+{
 	if (!ctx.qry.page) {
 		if (ctx.repo)
 			ctx.qry.page = "summary";
 		else
 			ctx.qry.page = "repolist";
 	}
-
-	for (i = 0; i < ARRAY_SIZE(commands); i++)
-		if (!strcmp(ctx.qry.page, commands[i].name))
-			return &commands[i];
-	return NULL;
+	return cgit_find_cmd(ctx.qry.page);
 }