Add Linting

.editorconfig

@@ -0,0 +1,21 @@
+root = true
+
+[*]
+indent_style = space
+indent_size = 2
+end_of_line = lf
+charset = utf-8
+trim_trailing_whitespace = true
+insert_final_newline = true
+
+[*.go]
+indent_style = tab
+indent_size = 4
+
+[Makefile]
+indent_style = tab
+indent_size = 4
+
+[*.mod]
+indent_style = tab
+indent_size = 4

.github/workflows/build.yaml

@@ -26,6 +26,11 @@ jobs:
         with:
           go-version-file: "go.mod"
 
+      - name: Lint
+        uses: golangci/golangci-lint-action@v7
+        with:
+          version: latest
+
       - name: Test
         run: go test ./...
 
@@ -59,6 +64,7 @@ jobs:
         uses: docker/setup-buildx-action@v3
 
       - name: Login to DockerHub
+        if: github.event_name == 'release' && github.event.action == 'published'
         uses: docker/login-action@v3
         with:
           username: ${{ vars.DOCKERHUB_USERNAME }}

.golangci.yml

@@ -0,0 +1,26 @@
+version: "2"
+
+run:
+  timeout: 10m
+  modules-download-mode: readonly
+
+formatters:
+  enable:
+    - gofmt
+    - goimports
+  settings:
+    goimports:
+      local-prefixes:
+        - github.com/Staffbase/yamllint-action
+
+linters:
+  default: none
+  enable:
+    - bodyclose
+    - gosec
+    - govet
+    - ineffassign
+    - noctx
+    - staticcheck
+    - unused
+    - whitespace

yamllint-action.go

@@ -108,7 +108,7 @@ func parseInput(r io.Reader) Report {
 			Severity: severity,
 		}
 
-		if _, exist := files[fileName]; exist == false {
+		if _, exist := files[fileName]; !exist {
 			files[fileName] = &LinterResult{FilePath: fileName}
 		}
 
@@ -156,15 +156,15 @@ func handlePush(ctx context.Context, client *github.Client, report Report) error
 	// find the action's checkrun
 	checkName := os.Getenv("ACTION_NAME")
 	result, _, err := client.Checks.ListCheckRunsForRef(ctx, owner, repoName, head, &github.ListCheckRunsOptions{
-		CheckName: github.String(checkName),
-		Status:    github.String("in_progress"),
+		CheckName: github.Ptr(checkName),
+		Status:    github.Ptr("in_progress"),
 	})
 	if err != nil {
 		return err
 	}
 
 	if len(result.CheckRuns) == 0 {
-		return fmt.Errorf("Unable to find check run for action: %s", checkName)
+		return fmt.Errorf("unable to find check run for action: %s", checkName)
 	}
 	checkRun := result.CheckRuns[0]
 
@@ -177,12 +177,12 @@ func handlePush(ctx context.Context, client *github.Client, report Report) error
 		if len(t.AssertionResults) > 0 {
 			for _, a := range t.AssertionResults {
 				annotations = append(annotations, &github.CheckRunAnnotation{
-					Path:            github.String(path),
-					StartLine:       github.Int(a.Line),
-					EndLine:         github.Int(a.Line),
-					AnnotationLevel: github.String(a.Severity),
-					Title:           github.String(""),
-					Message:         github.String(a.Message),
+					Path:            github.Ptr(path),
+					StartLine:       github.Ptr(a.Line),
+					EndLine:         github.Ptr(a.Line),
+					AnnotationLevel: github.Ptr(a.Severity),
+					Title:           github.Ptr(""),
+					Message:         github.Ptr(a.Message),
 				})
 			}
 		}
@@ -202,8 +202,8 @@ func handlePush(ctx context.Context, client *github.Client, report Report) error
 		}
 
 		output := &github.CheckRunOutput{
-			Title:       github.String("Result"),
-			Summary:     github.String(summary),
+			Title:       github.Ptr("Result"),
+			Summary:     github.Ptr(summary),
 			Annotations: annotations[i:end],
 		}
 

yamllint-action_test.go

@@ -14,13 +14,13 @@ limitations under the License.
 package main
 
 import (
-  "strings"
-  "testing"
+	"strings"
+	"testing"
 )
 
 func TestParseInput(t *testing.T) {
-  t.Run("standard case", func(t *testing.T) {
-    testData := `sources/prod/testapp-deploy.yaml:17:11: [warning] wrong indentation: expected 12 but found 10 (indentation)
+	t.Run("standard case", func(t *testing.T) {
+		testData := `sources/prod/testapp-deploy.yaml:17:11: [warning] wrong indentation: expected 12 but found 10 (indentation)
 sources/prod/testapp2-deploy.yaml:16:11: [warning] wrong indentation: expected 12 but found 10 (indentation)
 sources/prod/testapp3-deploy.yaml:16:11: [warning] wrong indentation: expected 12 but found 10 (indentation)
 sources/prod/testapp4-deploy.yaml:17:11: [warning] wrong indentation: expected 12 but found 10 (indentation)
@@ -31,21 +31,21 @@ sources/stage/testapp4-deploy.yaml:17:11: [warning] wrong indentation: expected
 sources/dev/testapp-deploy.yaml:17:11: [warning] wrong indentation: expected 12 but found 10 (indentation)
 sources/dev/testapp2-deploy.yaml:16:11: [warning] wrong indentation: expected 12 but found 10 (indentation)`
 
-    report := parseInput(strings.NewReader(testData))
-    if report.NumFailedLines != 10 {
-      t.Errorf("unexpected amount of failed lines: got %d, wanted %d", report.NumFailedLines, 10)
-    }
+		report := parseInput(strings.NewReader(testData))
+		if report.NumFailedLines != 10 {
+			t.Errorf("unexpected amount of failed lines: got %d, wanted %d", report.NumFailedLines, 10)
+		}
 
-    if report.LinterResults[0].AssertionResults[0].Severity != "warning" {
-      t.Errorf("unexpected severity found: got %s, wanted %s", report.LinterResults[0].AssertionResults[0].Severity, "warning")
-    }
-
-    if report.LinterResults[6].AssertionResults[0].Severity != "failure" {
-      t.Errorf("unexpected severity found: got %s, wanted %s", report.LinterResults[4].AssertionResults[0].Severity, "failure")
-    }
+		if report.LinterResults[0].AssertionResults[0].Severity != "warning" {
+			t.Errorf("unexpected severity found: got %s, wanted %s", report.LinterResults[0].AssertionResults[0].Severity, "warning")
+		}
 
-    if report.LinterResults[6].AssertionResults[0].Message != "wrong indentation: expected 12 but found 10 (indentation)" {
-      t.Errorf("unexpected severity found: got %s, wanted %s", report.LinterResults[4].AssertionResults[0].Message, "wrong indentation: expected 12 but found 10 (indentation)")
-    }
-  })
+		if report.LinterResults[6].AssertionResults[0].Severity != "failure" {
+			t.Errorf("unexpected severity found: got %s, wanted %s", report.LinterResults[4].AssertionResults[0].Severity, "failure")
+		}
+
+		if report.LinterResults[6].AssertionResults[0].Message != "wrong indentation: expected 12 but found 10 (indentation)" {
+			t.Errorf("unexpected severity found: got %s, wanted %s", report.LinterResults[4].AssertionResults[0].Message, "wrong indentation: expected 12 but found 10 (indentation)")
+		}
+	})
 }