v3

.github/dependabot.yml

@@ -0,0 +1,12 @@
+version: 2
+updates:
+  - package-ecosystem: github-actions
+    directory: /
+    schedule:
+      interval: monthly
+    open-pull-requests-limit: 0
+  - package-ecosystem: gomod
+    directory: /
+    schedule:
+      interval: monthly
+    open-pull-requests-limit: 0

.github/workflows/release.yml

@@ -0,0 +1,26 @@
+on:
+  push:
+    tags:
+      - '*'
+name: Release
+jobs:
+  goreleaser:
+    name: GoReleaser
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+      - name: Install Go
+        uses: actions/setup-go@v4
+        with:
+          go-version: '1.21'
+      - name: Run GoReleaser
+        uses: goreleaser/goreleaser-action@v5
+        with:
+          distribution: goreleaser
+          version: latest
+          args: release --clean
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

.github/workflows/test.yml

@@ -0,0 +1,28 @@
+on:
+  push:
+  pull_request:
+name: Test
+jobs:
+  test:
+    name: Test
+    strategy:
+      fail-fast: false
+      matrix:
+        go-version:
+          - 1.23.x
+          - 1.24.x
+          - 1.x
+        os:
+          - ubuntu-latest
+    runs-on: ${{ matrix.os }}
+    steps:
+      - name: Install Go
+        uses: actions/setup-go@v4
+        with:
+          go-version: ${{ matrix.go-version }}
+      - name: Checkout code
+        uses: actions/checkout@v4
+      - name: Test
+        run: go test -coverprofile=coverage.txt -covermode=atomic ./...
+      - name: Upload coverage to Codecov
+        uses: codecov/codecov-action@v3

.goreleaser.yml

@@ -0,0 +1,5 @@
+builds:
+  - skip: true
+
+release:
+  prerelease: auto

README.md

@@ -1,7 +1,7 @@
 # systemdconf
 
-[![tests](https://github.com/sergeymakinen/go-systemdconf/workflows/tests/badge.svg)](https://github.com/sergeymakinen/go-systemdconf/actions?query=workflow%3Atests)
-[![Go Reference](https://pkg.go.dev/badge/github.com/sergeymakinen/go-systemdconf.svg)](https://pkg.go.dev/github.com/sergeymakinen/go-systemdconf/v2)
+[![Test](https://github.com/sergeymakinen/go-systemdconf/actions/workflows/test.yml/badge.svg)](https://github.com/sergeymakinen/go-systemdconf/actions/workflows/test.yml)
+[![Go Reference](https://pkg.go.dev/badge/github.com/sergeymakinen/go-systemdconf.svg)](https://pkg.go.dev/github.com/sergeymakinen/go-systemdconf/v3)
 [![Go Report Card](https://goreportcard.com/badge/github.com/sergeymakinen/go-systemdconf)](https://goreportcard.com/report/github.com/sergeymakinen/go-systemdconf)
 [![codecov](https://codecov.io/gh/sergeymakinen/go-systemdconf/branch/master/graph/badge.svg)](https://codecov.io/gh/sergeymakinen/go-systemdconf)
 
@@ -16,13 +16,13 @@ in the documentation for the Marshal and Unmarshal functions
 Use go get:
 
 ```bash
-go get github.com/sergeymakinen/go-systemdconf/v2
+go get github.com/sergeymakinen/go-systemdconf/v3
 ```
 
 Then import the package into your own code:
 
 ```go
-import "github.com/sergeymakinen/go-systemdconf/v2"
+import "github.com/sergeymakinen/go-systemdconf/v3"
 ```
 
 

ast/ast.go

@@ -0,0 +1,97 @@
+// Package ast contains a parser and a printer for systemd configuration files through AST trees.
+package ast
+
+import "fmt"
+
+// Position describes an arbitrary source position
+// including line and column location.
+type Position struct {
+	Offset int // byte offset, starting at 0
+	Line   int // line number, starting at 1
+	Column int // column number, starting at 1 (character count per line)
+}
+
+func (p Position) String() string {
+	s := "-"
+	if p.Line != 0 {
+		s = fmt.Sprintf("%d", p.Line)
+		if p.Column != 0 {
+			s += fmt.Sprintf(":%d", p.Column)
+		}
+	}
+	return s
+}
+
+// Node describes a basic node.
+type Node interface {
+	Pos() Position // position of first character belonging to the node
+	End() Position // position of last character belonging to the node
+}
+
+// Children is a collection of child nodes.
+type Children []Node
+
+func (c Children) Pos() Position { return c[0].Pos() }
+func (c Children) End() Position { return c[len(c)-1].End() }
+
+// File represents a systemd configuration file.
+type File struct {
+	Children Children // Comment, Include, and Section nodes
+
+	pos, end Position
+}
+
+func (f *File) Pos() Position { return f.pos }
+func (f *File) End() Position { return f.end }
+
+// Comment represents a single comment.
+type Comment struct {
+	Text string // comment text starting with # or ;
+
+	pos, end Position
+}
+
+func (c *Comment) Pos() Position { return c.pos }
+func (c *Comment) End() Position { return c.end }
+
+// Include represents a .include directive (obsolete).
+type Include struct {
+	Path string // include path as specified in the directive
+
+	pos, end Position
+}
+
+func (i *Include) Pos() Position { return i.pos }
+func (i *Include) End() Position { return i.end }
+
+// Section represents a configuration section.
+type Section struct {
+	Name     string   // section name
+	Children Children // Comment, Include, and Entry nodes
+
+	pos, end Position
+}
+
+func (s *Section) Pos() Position { return s.pos }
+func (s *Section) End() Position { return s.end }
+
+// Entry represents a single key-value configuration entry.
+type Entry struct {
+	Key   string // key name
+	Value string // entry value
+
+	pos, end Position
+}
+
+func (e *Entry) Pos() Position { return e.pos }
+func (e *Entry) End() Position { return e.end }
+
+// ParseError is returned for parsing errors.
+type ParseError struct {
+	Err error    // the actual error
+	Pos Position // position where the error occurred
+}
+
+func (p *ParseError) Error() string {
+	return fmt.Sprintf("%v at %s", p.Err, p.Pos)
+}