don't run unused when targeting feature branches. (#3819)

don't run unused when targeting feature branches.

.github/workflows/golangci-feature.yml

@@ -0,0 +1,31 @@
+# golangci-feature runs on pull requests from branches that do not target main.
+#
+# Working on feature branches (PRs where the PR base-ref != main) is a common
+# workflow used, in order to make the merging of PRs easier certain lints are excluded
+# when it makes sense. Currently, unused lints are excluded since many PRs will add
+# unused code that will be used in a later PR.
+name: golangci-lint feature branch
+on:
+  pull_request:
+    # Ignore if the target is main. (Negation of golanci-lint.yml)
+    branches-ignore:
+      - main
+permissions:
+  contents: read
+  # Optional: allow read access to pull request. Use with `only-new-issues` option.
+  # pull-requests: read
+
+jobs:
+  golangci:
+    name: lint
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/setup-go@v4
+        with:
+          go-version: 1.19
+      - uses: actions/checkout@v3
+      - name: golangci-lint
+        uses: golangci/golangci-lint-action@v3.4.0
+        with:
+          version: v1.52.0
+          args: --timeout 5m --exclude unused

.github/workflows/golangci.yml

@@ -1,3 +1,5 @@
+# golang-ci runs on pushes to main and to tags whose name starts with "v" and to pull
+# requests from branches that target main.
 name: golangci-lint
 on:
   push:
@@ -6,10 +8,13 @@ on:
     branches:
       - main
   pull_request:
+    branches:
+      - main
 permissions:
   contents: read
   # Optional: allow read access to pull request. Use with `only-new-issues` option.
   # pull-requests: read
+
 jobs:
   golangci:
     name: lint