feat(indexers): add support for optional baseurl override (#551)

* feat(indexers): optional baseurl override

* feat(indexers): update baseUrl parsing

* refactor(indexers): BREAKING move parse to IRC struct

* Move Parse as part of IRC struct from Indexer
* Updated definitions
* Build torrentUrl in stages
* Use new url.JoinPath to build torrentUrl
* Update tests

* refactor(indexers): select option obj

* refactor(indexers): make backwards compatible

internal/indexer/definitions/milkie.yaml

@@ -5,7 +5,7 @@ identifier: milkie
 description: Milkie is a private torrent tracker for GENERAL.
 language: en-us
 urls:
-  - https://www.milkie.cc
+  - https://www.milkie.cc/
 privacy: private
 protocol: torrent
 supports:
@@ -50,20 +50,20 @@ irc:
       label: NickServ Password
       help: NickServ password
 
-parse:
-  type: single
-  lines:
-    - test:
-        - "{tv} :: The.Great.Xmas.Show.S00E00.1080p.WEB.H264-TEST :: [1080p, web] :: https://milkie.cc/browse/xxxxxxxxxxxx"
-      pattern: '{(.*)}\s::\s(.*)\s::\s\[(.*)\]\s::\s(https?\:\/\/[^\/]+\/)browse\/(.*)'
-      vars:
-        - category
-        - torrentName
-        - releaseTags
-        - baseUrl
-        - torrentId
+  parse:
+    type: single
+    lines:
+      - test:
+          - "{tv} :: The.Great.Xmas.Show.S00E00.1080p.WEB.H264-TEST :: [1080p, web] :: https://milkie.cc/browse/xxxxxxxxxxxx"
+        pattern: '{(.*)}\s::\s(.*)\s::\s\[(.*)\]\s::\s(https?\:\/\/[^\/]+\/)browse\/(.*)'
+        vars:
+          - category
+          - torrentName
+          - releaseTags
+          - baseUrl
+          - torrentId
 
-  match:
-    torrenturl: "{{ .baseUrl }}api/v1/torrents/{{ .torrentId }}/torrent?key={{ .apikey }}"
-    encode:
-      - apikey
+    match:
+      torrenturl: "/api/v1/torrents/{{ .torrentId }}/torrent?key={{ .apikey }}"
+      encode:
+        - apikey