ci: skip if labels did not changed

.github/labels.yaml

@@ -1,3 +1,7 @@
+¯\_(ツ)_/¯:
+    name: ¯\_(ツ)_/¯
+    color: f9d0c4
+    description: ¯\\\_(ツ)_/¯
 api:
     name: api
     color: 6f42c1

.github/workflows/example.yaml

@@ -12,10 +12,22 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v3
+      with:
+        fetch-depth: 0
+    - id: labels-changed
+      run: |
+        if git diff --name-only HEAD~1 HEAD | grep -q ".github/labels.yaml"; then
+          echo "changed=true" >> $GITHUB_OUTPUT
+        else
+          echo "changed=false" >> $GITHUB_OUTPUT
+        fi
     - uses: actions/setup-go@v4
+      if: steps.labels-changed.outputs.changed == 'true'
       with:
         go-version: '1.20'
-    - run: go install github.com/shanduur/labeler/cmd/labeler@main
-    - run: labeler upload --owner shanduur --repo labeler ./.github/labels.yaml
+    - if: steps.labels-changed.outputs.changed == 'true'
+      run: go install github.com/shanduur/labeler/cmd/labeler@main
+    - if: steps.labels-changed.outputs.changed == 'true'
+      run: labeler upload --owner shanduur --repo labeler ./.github/labels.yaml
       env:
-        GITHUB_TOKEN: ${{ secrets.LABELER_TOKEN }}
+        LABELER_TOKEN: ${{ secrets.LABELER_TOKEN }}

cmd/labeler/upload/upload.go

@@ -45,9 +45,9 @@ func New() *cli.Command {
 				return errors.New("wrong number of arguments, expected single <file>")
 			}
 
-			token, ok := os.LookupEnv("GITHUB_TOKEN")
+			token, ok := os.LookupEnv("LABELER_TOKEN")
 			if !ok {
-				return errors.New("GitHub Token not found")
+				return errors.New("GitHub Token (env = LABELER_TOKEN) not found")
 			}
 
 			ts := oauth2.StaticTokenSource(
@@ -73,7 +73,7 @@ func New() *cli.Command {
 			for name, label := range lbls {
 				slog.Info("processing label", "label_name", name, "label.color", label.Color)
 
-				err = uploadLabel(ctx.Context, client, "shanduur", "cluster-api-provider-pve", label)
+				err = uploadLabel(ctx.Context, client, owner, repo, label)
 				if err != nil {
 					return fmt.Errorf("unable to update label: %w", err)
 				}
@@ -91,6 +91,11 @@ func uploadLabel(ctx context.Context, client *github.Client, owner, repo string,
 		return errors.New("client is nil")
 	}
 
+	err := label.Validate()
+	if err != nil {
+		return fmt.Errorf("lablel validation failed: %w", err)
+	}
+
 	// first, check if label exist
 	ghLabel, err := getLabel(ctx, client, owner, repo, label.Name)
 	if err != nil {

labels/labels.go

@@ -1,6 +1,8 @@
 package labels
 
 import (
+	"errors"
+
 	"github.com/google/go-github/v53/github"
 )
 
@@ -10,6 +12,18 @@ type Label struct {
 	Description *string `yaml:"description,omitempty"`
 }
 
+func (l *Label) Validate() error {
+	if l.Name == "" {
+		return errors.New("name is empty")
+	}
+
+	if len(l.Color) != 6 {
+		return errors.New("color is empty")
+	}
+
+	return nil
+}
+
 func (l *Label) ToGitHub() *github.Label {
 	return &github.Label{
 		Name:        &l.Name,