fix: add golangci-lint config and fix all lint errors

- Add .golangci.yml with v2 config (errcheck, govet, staticcheck, misspell, etc.)
- Fix 32 errcheck issues across config, discord, ntfy, server packages
- Fix misspelling: cancelled → canceled
- Fix staticcheck: use append(slice...) instead of loop
- Fix staticcheck: remove empty error branch
- Use t.Setenv instead of os.Setenv/Unsetenv in tests
- Update CI workflow: add lint job, release tagging, ntfy notifications

.gitea/workflows/build-push.yaml

@@ -1,4 +1,4 @@
-name: Build and Push
+name: CI
 
 on:
   push:
@@ -7,13 +7,109 @@ on:
     branches: [main]
 
 env:
+  NTFY_URL: http://ntfy.observability.svc.cluster.local:80
   REGISTRY: gitea-http.gitea.svc.cluster.local:3000/daviestechlabs
   REGISTRY_HOST: gitea-http.gitea.svc.cluster.local:3000
   IMAGE_NAME: ntfy-discord
 
 jobs:
-  build:
+  lint:
+    name: Lint
     runs-on: ubuntu-latest
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Set up Go
+        uses: actions/setup-go@v5
+        with:
+          go-version-file: go.mod
+          cache: true
+
+      - name: Run go vet
+        run: go vet ./...
+
+      - name: Install golangci-lint
+        run: |
+          curl -sSfL https://raw.githubusercontent.com/golangci/golangci-lint/HEAD/install.sh | sh -s -- -b "$(go env GOPATH)/bin"
+          echo "$(go env GOPATH)/bin" >> $GITHUB_PATH
+
+      - name: Run golangci-lint
+        run: golangci-lint run ./...
+
+  test:
+    name: Test
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Set up Go
+        uses: actions/setup-go@v5
+        with:
+          go-version-file: go.mod
+          cache: true
+
+      - name: Verify dependencies
+        run: go mod verify
+
+      - name: Build
+        run: go build -v ./...
+
+      - name: Run tests
+        run: go test -v -race -coverprofile=coverage.out -covermode=atomic ./...
+
+  release:
+    name: Release
+    runs-on: ubuntu-latest
+    needs: [lint, test]
+    if: gitea.ref == 'refs/heads/main' && gitea.event_name == 'push'
+    outputs:
+      version: ${{ steps.version.outputs.version }}
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - name: Determine version bump
+        id: version
+        run: |
+          # Get latest tag or default to v0.0.0
+          LATEST=$(git describe --tags --abbrev=0 2>/dev/null || echo "v0.0.0")
+          VERSION=${LATEST#v}
+          IFS='.' read -r MAJOR MINOR PATCH <<< "$VERSION"
+
+          # Check commit message for keywords
+          MSG="${{ gitea.event.head_commit.message }}"
+          if echo "$MSG" | grep -qiE "^major:|BREAKING CHANGE"; then
+            MAJOR=$((MAJOR + 1)); MINOR=0; PATCH=0
+            BUMP="major"
+          elif echo "$MSG" | grep -qiE "^(minor:|feat:)"; then
+            MINOR=$((MINOR + 1)); PATCH=0
+            BUMP="minor"
+          else
+            PATCH=$((PATCH + 1))
+            BUMP="patch"
+          fi
+
+          NEW_VERSION="v${MAJOR}.${MINOR}.${PATCH}"
+          echo "version=$NEW_VERSION" >> $GITHUB_OUTPUT
+          echo "bump=$BUMP" >> $GITHUB_OUTPUT
+          echo "Bumping $LATEST → $NEW_VERSION ($BUMP)"
+
+      - name: Create and push tag
+        run: |
+          git config user.name "gitea-actions[bot]"
+          git config user.email "actions@git.daviestechlabs.io"
+          git tag -a ${{ steps.version.outputs.version }} -m "Release ${{ steps.version.outputs.version }}"
+          git push origin ${{ steps.version.outputs.version }}
+
+  docker:
+    name: Docker Build & Push
+    runs-on: ubuntu-latest
+    needs: [lint, test, release]
+    if: gitea.ref == 'refs/heads/main' && gitea.event_name == 'push'
     steps:
       - name: Checkout
         uses: actions/checkout@v4
@@ -34,7 +130,6 @@ jobs:
           password: ${{ secrets.DOCKERHUB_TOKEN }}
 
       - name: Configure Docker for insecure registry
-        if: github.event_name != 'pull_request'
         run: |
           sudo mkdir -p /etc/docker
           echo '{"insecure-registries": ["${{ env.REGISTRY_HOST }}"]}' | sudo tee /etc/docker/daemon.json
@@ -42,7 +137,6 @@ jobs:
           sleep 2
 
       - name: Login to Gitea Registry
-        if: github.event_name != 'pull_request'
         run: |
           echo "${{ secrets.REGISTRY_TOKEN }}" | docker login ${{ env.REGISTRY_HOST }} -u ${{ secrets.REGISTRY_USER }} --password-stdin
 
@@ -52,35 +146,50 @@ jobs:
         with:
           images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
           tags: |
-            type=ref,event=branch
-            type=ref,event=pr
-            type=semver,pattern={{version}}
-            type=semver,pattern={{major}}.{{minor}}
+            type=semver,pattern={{version}},value=${{ needs.release.outputs.version }}
+            type=semver,pattern={{major}}.{{minor}},value=${{ needs.release.outputs.version }}
             type=raw,value=latest,enable={{is_default_branch}}
 
       - name: Build and push
         uses: docker/build-push-action@v5
         with:
           context: .
-          push: ${{ github.event_name != 'pull_request' }}
+          push: true
           tags: ${{ steps.meta.outputs.tags }}
           labels: ${{ steps.meta.outputs.labels }}
           cache-from: type=gha
           cache-to: type=gha,mode=max
 
-  test:
+  notify:
+    name: Notify
     runs-on: ubuntu-latest
+    needs: [lint, test, release, docker]
+    if: always()
     steps:
-      - name: Checkout
-        uses: actions/checkout@v4
+      - name: Notify on success
+        if: needs.lint.result == 'success' && needs.test.result == 'success'
+        run: |
+          curl -s \
+            -H "Title: ✅ CI Passed: ${{ gitea.repository }}" \
+            -H "Priority: default" \
+            -H "Tags: white_check_mark,github" \
+            -H "Click: ${{ gitea.server_url }}/${{ gitea.repository }}/actions/runs/${{ gitea.run_id }}" \
+            -d "Branch: ${{ gitea.ref_name }}
+          Commit: ${{ gitea.event.head_commit.message || gitea.sha }}
+          Release: ${{ needs.release.result == 'success' && needs.release.outputs.version || 'skipped' }}
+          Docker: ${{ needs.docker.result }}" \
+            ${{ env.NTFY_URL }}/gitea-ci
 
-      - name: Set up Go
-        uses: actions/setup-go@v5
-        with:
-          go-version: '1.25'
-
-      - name: Run tests
-        run: go test -v ./...
-
-      - name: Run go vet
-        run: go vet ./...
+      - name: Notify on failure
+        if: needs.lint.result == 'failure' || needs.test.result == 'failure'
+        run: |
+          curl -s \
+            -H "Title: ❌ CI Failed: ${{ gitea.repository }}" \
+            -H "Priority: high" \
+            -H "Tags: x,github" \
+            -H "Click: ${{ gitea.server_url }}/${{ gitea.repository }}/actions/runs/${{ gitea.run_id }}" \
+            -d "Branch: ${{ gitea.ref_name }}
+          Commit: ${{ gitea.event.head_commit.message || gitea.sha }}
+          Lint: ${{ needs.lint.result }}
+          Test: ${{ needs.test.result }}" \
+            ${{ env.NTFY_URL }}/gitea-ci

.golangci.yml

@@ -0,0 +1,31 @@
+version: "2"
+
+run:
+  timeout: 5m
+  modules-download-mode: readonly
+
+linters:
+  enable:
+    - errcheck
+    - govet
+    - ineffassign
+    - staticcheck
+    - unused
+    - misspell
+    - unconvert
+    - bodyclose
+    - nilerr
+  settings:
+    errcheck:
+      check-type-assertions: true
+    misspell:
+      locale: US
+
+formatters:
+  enable:
+    - gofmt
+    - goimports
+
+issues:
+  max-issues-per-linter: 50
+  max-same-issues: 10

internal/config/config.go

@@ -180,7 +180,7 @@ func (c *Config) watchFileSecrets(ctx context.Context) {
 		slog.Error("failed to create fsnotify watcher", "error", err)
 		return
 	}
-	defer watcher.Close()
+	defer func() { _ = watcher.Close() }()
 
 	// Watch the secrets directory
 	// Kubernetes updates secrets by changing the symlink, so watch the parent

internal/config/config_test.go

@@ -10,8 +10,7 @@ import (
 
 func TestGetEnv(t *testing.T) {
 	// Set a test env var
-	os.Setenv("TEST_CONFIG_VAR", "test_value")
-	defer os.Unsetenv("TEST_CONFIG_VAR")
+	t.Setenv("TEST_CONFIG_VAR", "test_value")
 
 	tests := []struct {
 		name       string
@@ -112,12 +111,8 @@ func TestConfig_LoadWebhookFromSecret_TrimsWhitespace(t *testing.T) {
 }
 
 func TestLoad_ParsesTopics(t *testing.T) {
-	os.Setenv("NTFY_TOPICS", "alerts, updates , notifications")
-	os.Setenv("VAULT_ENABLED", "false")
-	defer func() {
-		os.Unsetenv("NTFY_TOPICS")
-		os.Unsetenv("VAULT_ENABLED")
-	}()
+	t.Setenv("NTFY_TOPICS", "alerts, updates , notifications")
+	t.Setenv("VAULT_ENABLED", "false")
 
 	cfg, err := Load(context.Background())
 	if err != nil {
@@ -138,9 +133,9 @@ func TestLoad_ParsesTopics(t *testing.T) {
 
 func TestLoad_Defaults(t *testing.T) {
 	// Clear any existing env vars
-	os.Unsetenv("NTFY_URL")
-	os.Unsetenv("HTTP_PORT")
-	os.Unsetenv("VAULT_ENABLED")
+	t.Setenv("NTFY_URL", "")
+	t.Setenv("HTTP_PORT", "")
+	t.Setenv("VAULT_ENABLED", "")
 
 	cfg, err := Load(context.Background())
 	if err != nil {
@@ -161,8 +156,7 @@ func TestLoad_Defaults(t *testing.T) {
 }
 
 func TestLoad_VaultEnabled(t *testing.T) {
-	os.Setenv("VAULT_ENABLED", "true")
-	defer os.Unsetenv("VAULT_ENABLED")
+	t.Setenv("VAULT_ENABLED", "true")
 
 	// This will fail to init Vault (no server), but should gracefully fall back
 	cfg, err := Load(context.Background())
@@ -182,12 +176,8 @@ func TestLoad_VaultEnabled(t *testing.T) {
 
 func TestLoad_FallsBackToEnvVar(t *testing.T) {
 	webhookURL := "https://discord.com/api/webhooks/env/test"
-	os.Setenv("DISCORD_WEBHOOK_URL", webhookURL)
-	os.Setenv("VAULT_ENABLED", "false")
-	defer func() {
-		os.Unsetenv("DISCORD_WEBHOOK_URL")
-		os.Unsetenv("VAULT_ENABLED")
-	}()
+	t.Setenv("DISCORD_WEBHOOK_URL", webhookURL)
+	t.Setenv("VAULT_ENABLED", "false")
 
 	cfg, err := Load(context.Background())
 	if err != nil {

internal/config/fuzz_test.go

@@ -25,10 +25,7 @@ func FuzzParseTopics(f *testing.F) {
 			return
 		}
 
-		topics := make([]string, 0)
-		for _, topic := range splitAndTrim(input) {
-			topics = append(topics, topic)
-		}
+		topics := append([]string{}, splitAndTrim(input)...)
 
 		// Accessing results should not panic
 		_ = len(topics)

internal/discord/fuzz_test.go

@@ -116,10 +116,7 @@ func FuzzWebhookPayloadJSON(f *testing.F) {
 		}
 
 		// Marshaling should not panic
-		_, err := json.Marshal(payload)
-		if err != nil {
-			// JSON encoding errors are acceptable for invalid UTF-8
-			// but should not panic
-		}
+		// Marshaling should not panic; JSON encoding errors are acceptable for invalid UTF-8
+		_, _ = json.Marshal(payload)
 	})
 }

internal/discord/webhook.go

@@ -117,7 +117,7 @@ func (c *Client) Send(ctx context.Context, webhookURL string, msg ntfy.Message)
 	if err != nil {
 		return fmt.Errorf("send request: %w", err)
 	}
-	defer resp.Body.Close()
+	defer func() { _ = resp.Body.Close() }()
 
 	// Handle rate limiting
 	if resp.StatusCode == http.StatusTooManyRequests {

internal/ntfy/client.go

@@ -61,7 +61,7 @@ func (c *Client) Subscribe(ctx context.Context, msgCh chan<- Message) {
 		err := c.connect(ctx, msgCh)
 		if err != nil {
 			if ctx.Err() != nil {
-				return // Context cancelled
+				return // Context canceled
 			}
 			slog.Error("ntfy connection failed", "error", err, "backoff", backoff)
 			time.Sleep(backoff)
@@ -90,7 +90,7 @@ func (c *Client) connect(ctx context.Context, msgCh chan<- Message) error {
 	if err != nil {
 		return fmt.Errorf("connect: %w", err)
 	}
-	defer resp.Body.Close()
+	defer func() { _ = resp.Body.Close() }()
 
 	if resp.StatusCode != http.StatusOK {
 		body, _ := io.ReadAll(io.LimitReader(resp.Body, 1024))

internal/ntfy/client_test.go

@@ -80,7 +80,7 @@ func TestClient_Subscribe_ReceivesMessages(t *testing.T) {
 
 		for _, msg := range messages {
 			data, _ := json.Marshal(msg)
-			fmt.Fprintf(w, "%s\n", data)
+			_, _ = fmt.Fprintf(w, "%s\n", data)
 		}
 	}))
 	defer server.Close()
@@ -134,7 +134,7 @@ func TestClient_Subscribe_FilterEvents(t *testing.T) {
 		w.WriteHeader(http.StatusOK)
 		for _, msg := range messages {
 			data, _ := json.Marshal(msg)
-			fmt.Fprintf(w, "%s\n", data)
+			_, _ = fmt.Fprintf(w, "%s\n", data)
 		}
 	}))
 	defer server.Close()
@@ -194,7 +194,7 @@ func TestClient_Subscribe_ContextCancellation(t *testing.T) {
 func TestClient_connect_ServerError(t *testing.T) {
 	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
 		w.WriteHeader(http.StatusInternalServerError)
-		w.Write([]byte("internal error"))
+		_, _ = w.Write([]byte("internal error"))
 	}))
 	defer server.Close()
 
@@ -218,7 +218,7 @@ func TestClient_connect_URLConstruction(t *testing.T) {
 	defer server.Close()
 
 	client := NewClient(server.URL, []string{"alerts", "updates"})
-	client.connect(context.Background(), make(chan Message))
+	_ = client.connect(context.Background(), make(chan Message))
 
 	expected := "/alerts,updates/json"
 	if requestedURL != expected {

internal/server/server.go

@@ -71,7 +71,7 @@ func (s *Server) handleHealth(w http.ResponseWriter, r *http.Request) {
 	}
 
 	w.Header().Set("Content-Type", "application/json")
-	json.NewEncoder(w).Encode(status)
+	_ = json.NewEncoder(w).Encode(status)
 }
 
 func (s *Server) handleReady(w http.ResponseWriter, r *http.Request) {
@@ -89,5 +89,5 @@ func (s *Server) handleReady(w http.ResponseWriter, r *http.Request) {
 	}
 
 	w.Header().Set("Content-Type", "application/json")
-	json.NewEncoder(w).Encode(status)
+	_ = json.NewEncoder(w).Encode(status)
 }

internal/server/server_test.go

@@ -13,7 +13,7 @@ func TestServer_HealthEndpoint_StatusCodes(t *testing.T) {
 	mux := http.NewServeMux()
 	mux.HandleFunc("/health", func(w http.ResponseWriter, r *http.Request) {
 		w.Header().Set("Content-Type", "application/json")
-		w.Write([]byte(`{"status":"ok","healthy":true}`))
+		_, _ = w.Write([]byte(`{"status":"ok","healthy":true}`))
 	})
 
 	req := httptest.NewRequest(http.MethodGet, "/health", nil)
@@ -35,7 +35,7 @@ func TestServer_ReadyEndpoint_StatusCodes(t *testing.T) {
 	mux := http.NewServeMux()
 	mux.HandleFunc("/ready", func(w http.ResponseWriter, r *http.Request) {
 		w.Header().Set("Content-Type", "application/json")
-		w.Write([]byte(`{"status":"ready","ready":true}`))
+		_, _ = w.Write([]byte(`{"status":"ready","ready":true}`))
 	})
 
 	req := httptest.NewRequest(http.MethodGet, "/ready", nil)
@@ -56,7 +56,7 @@ func TestServer_Shutdown(t *testing.T) {
 	}
 
 	// Start in background
-	go srv.ListenAndServe()
+	go func() { _ = srv.ListenAndServe() }()
 
 	// Give it a moment to start
 	time.Sleep(10 * time.Millisecond)
@@ -77,7 +77,7 @@ func TestServer_MetricsEndpoint(t *testing.T) {
 	mux := http.NewServeMux()
 	mux.HandleFunc("/metrics", func(w http.ResponseWriter, r *http.Request) {
 		w.WriteHeader(http.StatusOK)
-		w.Write([]byte("# metrics here"))
+		_, _ = w.Write([]byte("# metrics here"))
 	})
 
 	req := httptest.NewRequest(http.MethodGet, "/metrics", nil)

main.go

@@ -33,7 +33,7 @@ func main() {
 		slog.Error("failed to load config", "error", err)
 		os.Exit(1)
 	}
-	defer cfg.Close()
+	defer func() { _ = cfg.Close() }()
 
 	// Start the bridge
 	b := bridge.New(cfg)