Add yamllint to prebuild workflow

Signed-off-by: David Son <[email protected]>

Author: sondavidb

.github/workflows/prebuild.yml

@@ -53,7 +53,7 @@ jobs:
   lint:
     strategy:
       matrix:
-        working_dir: ['', 'cmd']
+        working_dir: ['.', 'cmd']
     runs-on: ubuntu-20.04
     steps:
       - uses: actions/checkout@v4
@@ -62,6 +62,13 @@ jobs:
           version: v${{ env.GOLANGCI_LINT_VERSION }}
           working-directory: ${{ matrix.working_dir }}
 
+  yamllint:
+    name: yamllint-lint
+    runs-on: ubuntu-20.04
+    steps:
+      - uses: actions/checkout@v4
+      - run: yamllint .
+
   shellcheck:
     runs-on: ubuntu-20.04
     container: koalaman/shellcheck-alpine:v0.10.0

.yamllint.yml

@@ -0,0 +1,12 @@
+extends: default
+
+rules:
+  trailing-spaces:
+    # issue templates intentionally have some whitespace
+    ignore: .github/ISSUE_TEMPLATE/
+
+  document-start: disable # preference, can enable if desired
+  comments: disable # doesn't like in-line comments like this
+  line-length: disable # hard to enforce <80 chars for some cmds
+  truthy:
+    allowed-values: ['true', 'false', 'on']