Feature/ci

.dockerignore

@@ -0,0 +1,8 @@
+bin
+docs
+examples
+.gitignore
+.git/
+**/*.md
+Dockerfile
+Makefile

.github/dependabot.yaml

@@ -0,0 +1,10 @@
+version: 2
+updates:
+  - package-ecosystem: gomod
+    directory: "/"
+    schedule:
+      interval: weekly
+  - package-ecosystem: github-actions
+    directory: "/"
+    schedule:
+      interval: weekly

.github/workflows/check.yaml

@@ -0,0 +1,87 @@
+name: Check
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+    branches: [main]
+  workflow_call:
+
+permissions:
+  contents: read
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.head_ref || github.run_id }}
+  cancel-in-progress: true
+
+jobs:
+  format:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+      - name: Setup Go
+        uses: actions/setup-go@v5
+        with:
+          go-version-file: 'go.mod'
+      - name: Format
+        run: go fmt ./... && git diff --exit-code
+  lint: 
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+      - name: Setup Go
+        uses: actions/setup-go@v5
+        with:
+          go-version-file: 'go.mod'
+      - name: Vet
+        run: go vet ./...
+      - name: Lint
+        uses: golangci/golangci-lint-action@v6
+        with:
+          version: v1.58
+  module:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+      - name: Setup Go
+        uses: actions/setup-go@v5
+        with:
+          go-version-file: 'go.mod'
+      - name: Mod tidy
+        run: go mod tidy && git diff --exit-code
+      - name: Mod download
+        run: go mod download
+      - name: Mod verify
+        run: go mod verify
+  build:
+    needs: [format, lint, module]
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+      - name: Setup Go
+        uses: actions/setup-go@v5
+        with:
+          go-version-file: 'go.mod'
+      - name: Build
+        run: go build -o /dev/null
+  test:
+    needs: build
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+      - name: Setup Go
+        uses: actions/setup-go@v5
+        with:
+          go-version-file: 'go.mod'
+      - name: Test
+        run: go test -v -race -shuffle=on -coverprofile=coverage.txt ./...
+      - name: Upload coverage reports to Codecov
+        uses: codecov/codecov-action@v4.0.1
+        with:
+          token: ${{ secrets.CODECOV_TOKEN }}
+          files: coverage.txt

.github/workflows/release.yaml

@@ -0,0 +1,66 @@
+name: Release
+
+on:
+  push:
+    tags:
+      - "v*.*.*"
+
+env:
+  REGISTRY: ghcr.io
+  IMAGE_NAME: ${{ github.repository }}
+
+jobs:
+  check:
+    uses: ./.github/workflows/check.yaml
+  build-and-push-image:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
+      attestations: write
+      id-token: write
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+      - name: Log in to the container registry
+        uses: docker/login-action@v5
+        with:
+          registry: ${{ env.REGISTRY }}
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+      - name: Extract metadata (tags, labels) for Docker
+        id: meta
+        uses: docker/metadata-action@v5
+        with:
+          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
+      - name: Build and push Docker image
+        id: push
+        uses: docker/build-push-action@v6
+        with:
+          context: .
+          push: true
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}
+      - name: Generate artifact attestation
+        uses: actions/attest-build-provenance@v1
+        with:
+          subject-name: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME}}
+          subject-digest: ${{ steps.push.outputs.digest }}
+          push-to-registry: true
+  create-release:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+      - name: Set up Go
+        uses: actions/setup-go@v5
+      - name: Run goreleaser
+        uses: goreleaser/goreleaser-action@v6
+        with:
+          distribution: goreleaser
+          version: '~> v2'
+          args: release --clean
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

.gitignore

@@ -1 +1,2 @@
 bin
+dist/

.goreleaser.yaml

@@ -0,0 +1,46 @@
+# This is an example .goreleaser.yml file with some sensible defaults.
+# Make sure to check the documentation at https://goreleaser.com
+
+# The lines below are called `modelines`. See `:help modeline`
+# Feel free to remove those if you don't want/need to use them.
+# yaml-language-server: $schema=https://goreleaser.com/static/schema.json
+# vim: set ts=2 sw=2 tw=0 fo=cnqoj
+
+version: 2
+
+before:
+  hooks:
+    # You may remove this if you don't use go modules.
+    - go mod tidy
+    # you may remove this if you don't need go generate
+    - go generate ./...
+
+builds:
+  - env:
+      - CGO_ENABLED=0
+    goos:
+      - linux
+      - windows
+      - darwin
+
+archives:
+  - format: tar.gz
+    # this name template makes the OS and Arch compatible with the results of `uname`.
+    name_template: >-
+      {{ .ProjectName }}_
+      {{- title .Os }}_
+      {{- if eq .Arch "amd64" }}x86_64
+      {{- else if eq .Arch "386" }}i386
+      {{- else }}{{ .Arch }}{{ end }}
+      {{- if .Arm }}v{{ .Arm }}{{ end }}
+    # use zip for windows archives
+    format_overrides:
+      - goos: windows
+        format: zip
+
+changelog:
+  sort: asc
+  filters:
+    exclude:
+      - "^docs:"
+      - "^test:"

Dockerfile

@@ -0,0 +1,20 @@
+FROM golang:1.22 AS build-stage
+
+WORKDIR /app
+
+COPY go.mod go.sum ./
+RUN go mod download
+
+COPY . .
+
+RUN CGO_ENABLED=0 GOOS=linux go build -o /zettelkasten-exporter
+
+FROM gcr.io/distroless/base-debian12 AS release-stage
+
+WORKDIR /
+
+COPY --from=build-stage /zettelkasten-exporter /zettelkasten-exporter
+
+USER nonroot:nonroot
+
+ENTRYPOINT ["/zettelkasten-exporter"]

Makefile

@@ -1,8 +1,8 @@
 BINARY_NAME=zettelkasten-exporter
 
-.PHONY: all clean format test build run
+.PHONY: all clean format vet lint test build run
 
-all: format vet build
+all: format vet build test
 
 clean:
 	go clean
@@ -14,11 +14,26 @@ format:
 vet:
 	go vet ./...
 
+lint:
+	golangci-lint run
+
 test:
 	go test ./...
 
 build:
-	go build -o bin/$(BINARY_NAME) ./cmd/zettelkasten-exporter/main.go
+	go build -o bin/$(BINARY_NAME)
 
 run: build
-	ZETTELKASTEN_DIRECTORY=./sample ./bin/$(BINARY_NAME)
+	LOG_LEVEL=INFO \
+	ZETTELKASTEN_GIT_URL=<GIT_URL> \
+	ZETTELKASTEN_GIT_BRANCH=master \
+	ZETTELKASTEN_GIT_TOKEN=<GIT_TOKEN> \
+	COLLECTION_INTERVAL=10s \
+	INFLUXDB_TOKEN=<INFLUXDB_TOKEN> \
+	INFLUXDB_URL=http://localhost:8086 \
+	INFLUXDB_ORG=default \
+	INFLUXDB_BUCKET=zettelkasten \
+	./bin/$(BINARY_NAME)
+
+docker:
+	docker build . -t zettelkasten-exporter:latest

internal/collector/collector.go

@@ -52,6 +52,11 @@ func (c *Collector) collectMetrics(root fs.FS) (metrics.Metrics, error) {
 	notes := make(map[string]metrics.NoteMetrics)
 
 	err := fs.WalkDir(root, ".", func(path string, dir fs.DirEntry, err error) error {
+		if err != nil {
+			slog.Error("Error on path. Will not enter it", slog.Any("error", err), slog.String("path", path))
+			return nil
+		}
+
 		// Skip ignored files or directories
 		if slices.Contains(c.config.IgnorePatterns, filepath.Base(path)) {
 			if dir.IsDir() {

internal/collector/note.go

@@ -31,7 +31,7 @@ func collectLinks(content []byte) map[string]int {
 	reader := text.NewReader(content)
 	root := md.Parser().Parse(reader)
 	links := make(map[string]int)
-	ast.Walk(root, func(n ast.Node, entering bool) (ast.WalkStatus, error) {
+	err := ast.Walk(root, func(n ast.Node, entering bool) (ast.WalkStatus, error) {
 		if entering && slices.Contains(linkKinds, n.Kind()) {
 			var target string
 			switch v := n.(type) {
@@ -55,6 +55,9 @@ func collectLinks(content []byte) map[string]int {
 		}
 		return ast.WalkContinue, nil
 	})
+	if err != nil {
+		slog.Error("Error walking note AST", slog.Any("error", err))
+	}
 	slog.Debug("Collected links", slog.Any("links", links))
 	return links
 }

internal/config/config.go

@@ -15,7 +15,7 @@ import (
 
 type Config struct {
 	ZettelkastenDirectory    string        `koanf:"zettelkasten_directory" validate:"requiredWithout:ZettelkastenGitURL"`
-	ZettelkastenGitURL       string        `koanf:"zettelkasten_git_url" validate:"requiredWithout:ZettelkastenDirectory" validate:"url/isURL"`
+	ZettelkastenGitURL       string        `koanf:"zettelkasten_git_url" validate:"requiredWithout:ZettelkastenDirectory|url"`
 	ZettelkastenGitBranch    string        `koanf:"zettelkasten_git_branch"`
 	ZettelkastenGitToken     string        `koanf:"zettelkasten_git_token"`
 	LogLevel                 slog.Level    `koanf:"log_level"`
@@ -32,16 +32,19 @@ func LoadConfig() (Config, error) {
 	k := koanf.New(".")
 
 	// Set default values
-	k.Load(structs.Provider(Config{
+	err := k.Load(structs.Provider(Config{
 		LogLevel:                 slog.LevelInfo,
 		IgnoreFiles:              []string{".git", ".obsidian", ".trash", "README.md"},
 		ZettelkastenGitBranch:    "main",
 		CollectionInterval:       time.Minute * 5,
 		CollectHistoricalMetrics: true,
 	}, "koanf"), nil)
+	if err != nil {
+		return Config{}, fmt.Errorf("error loading default config values: %w", err)
+	}
 
 	// Load env variables
-	k.Load(env.ProviderWithValue("", ".", func(key, value string) (string, interface{}) {
+	err = k.Load(env.ProviderWithValue("", ".", func(key, value string) (string, interface{}) {
 		key = strings.ToLower(key)
 		if key == "collection_interval" {
 			parsedValue, err := parseCollectionInterval(value)
@@ -53,10 +56,16 @@ func LoadConfig() (Config, error) {
 		}
 		return key, value
 	}), nil)
+	if err != nil {
+		return Config{}, fmt.Errorf("error loading env variables: %w", err)
+	}
 
 	// Unmarshal into config struct
 	var cfg Config
-	k.Unmarshal("", &cfg)
+	err = k.Unmarshal("", &cfg)
+	if err != nil {
+		return Config{}, fmt.Errorf("error unmarshalling config: %w", err)
+	}
 
 	// Validate config
 	v := validate.Struct(cfg)

internal/zettelkasten/git.go

@@ -121,7 +121,7 @@ func (g GitZettelkasten) WalkHistory(walkFunc WalkFunc) error {
 		return nil
 	})
 	err = w.Reset(&git.ResetOptions{
-		Commit: *&originalHash,
+		Commit: originalHash,
 		Mode:   git.HardReset,
 	})
 	if err != nil {

cmd/zettelkasten-exporter/main.go → main.go

@@ -14,7 +14,8 @@ import (
 func main() {
 	// Setup
 	cfg, err := config.LoadConfig()
-	slog.SetLogLoggerLevel(cfg.LogLevel)
+	logger := slog.New(slog.NewTextHandler(os.Stderr, &slog.HandlerOptions{Level: cfg.LogLevel}))
+	slog.SetDefault(logger)
 	if err != nil {
 		slog.Error("Error loading config", slog.Any("error", err))
 		os.Exit(1)