Add Ameba static code analysis tool to dev shards

Author: SamantazFox

.ameba.yml

@@ -0,0 +1,92 @@
+#
+# Lint
+#
+
+# Exclude assigns for ECR files
+Lint/UselessAssign:
+  Excluded:
+  - src/invidious.cr
+  - src/invidious/helpers/errors.cr
+  - src/invidious/routes/**/*.cr
+
+# Ignore false negative (if !db.query_one?...)
+Lint/UnreachableCode:
+  Excluded:
+  - src/invidious/database/base.cr
+
+# Ignore shadowed variable `key` (it works for now, and that's
+# a sensitive part of the code)
+Lint/ShadowingOuterLocalVar:
+  Excluded:
+  - src/invidious/helpers/tokens.cr
+
+
+#
+# Style
+#
+
+Style/RedundantBegin:
+  Enabled: false
+
+Style/RedundantReturn:
+  Enabled: false
+
+
+#
+# Metrics
+#
+
+# Ignore function complexity (number of if/else & case/when branches)
+# For some functions that can hardly be simplified for now
+Metrics/CyclomaticComplexity:
+  Excluded:
+  # get_about_info(ucid, locale) => [17/10]
+  - src/invidious/channels/about.cr
+
+  # fetch_channel_community(ucid, continuation, ...) => [34/10]
+  - src/invidious/channels/community.cr
+
+  # create_notification_stream(env, topics, connection_channel) => [14/10]
+  - src/invidious/helpers/helpers.cr:84:5
+
+  # get_index(plural_form, count) => [25/10]
+  - src/invidious/helpers/i18next.cr
+
+  # call(context) => [18/10]
+  - src/invidious/helpers/static_file_handler.cr
+
+  # show(env) => [38/10]
+  - src/invidious/routes/embed.cr
+
+  # get_video_playback(env) => [45/10]
+  - src/invidious/routes/video_playback.cr
+
+  # handle(env) => [40/10]
+  - src/invidious/routes/watch.cr
+
+  # playlist_ajax(env) => [24/10]
+  - src/invidious/routes/playlists.cr
+
+  # fetch_youtube_comments(id, cursor, ....) => [40/10]
+  # template_youtube_comments(comments, locale, ...) => [16/10]
+  # content_to_comment_html(content) => [14/10]
+  - src/invidious/comments.cr
+
+  # to_json(locale, json) => [21/10]
+  # extract_video_info(video_id, ...) => [44/10]
+  # process_video_params(query, preferences) => [20/10]
+  - src/invidious/videos.cr
+
+  # produce_search_params(page, sort, ...) => [29/10]
+  # process_search_query(query, page, ...) => [14/10]
+  - src/invidious/search.cr
+
+
+
+#src/invidious/playlists.cr:327:5
+#[C] Metrics/CyclomaticComplexity: Cyclomatic complexity too high [19/10]
+# fetch_playlist(plid : String)
+
+#src/invidious/playlists.cr:436:5
+#[C] Metrics/CyclomaticComplexity: Cyclomatic complexity too high [11/10]
+# extract_playlist_videos(initial_data : Hash(String, JSON::Any))

shard.lock

@@ -48,3 +48,6 @@ shards:
     git: https://github.com/crystal-lang/crystal-sqlite3.git
     version: 0.18.0
 
+  ameba:
+    git: https://github.com/crystal-ameba/ameba.git
+    version: 0.14.3

shard.yml

@@ -33,6 +33,9 @@ development_dependencies:
   spectator:
     github: icy-arctic-fox/spectator
     version: ~> 0.10.4
+  ameba:
+    github: crystal-ameba/ameba
+    version: ~> 0.14.3
 
 crystal: ">= 1.0.0, < 2.0.0"