feat: add helmchart updater

Signed-off-by: skuethe <56306041+skuethe@users.noreply.github.com>

internal/updater/helmchart.go

@@ -0,0 +1,35 @@
+package updater
+
+import (
+	"regexp"
+)
+
+// HelmChart creates an updater that modifies the version field in Chart.yaml files
+func HelmChart() Updater {
+	return helmchart{}
+}
+
+type helmchart struct{}
+
+func (h helmchart) Files() []string {
+	return []string{"Chart.yaml"}
+}
+
+func (h helmchart) CreateNewFiles() bool {
+	return false
+}
+
+func (h helmchart) Update(info ReleaseInfo) func(content string) (string, error) {
+	return func(content string) (string, error) {
+		// Regex to match ^version: ...$ with flexible whitespace in multiline mode
+		versionRegex := regexp.MustCompile(`(?m:^(version:\s*)\S*$)`)
+
+		// Check if the file contains a version field
+		if !versionRegex.MatchString(content) {
+			return content, nil
+		}
+
+		// Replace the version value while preserving the original formatting
+		return versionRegex.ReplaceAllString(content, `${1}`+info.Version), nil
+	}
+}

internal/updater/helmchart_test.go

@@ -0,0 +1,62 @@
+package updater
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestHelmChartUpdater_Files(t *testing.T) {
+	assert.Equal(t, []string{"Chart.yaml"}, HelmChart().Files())
+}
+
+func TestHelmChartUpdater_CreateNewFiles(t *testing.T) {
+	assert.False(t, HelmChart().CreateNewFiles())
+}
+
+func TestHelmChartUpdater_Update(t *testing.T) {
+	tests := []updaterTestCase{
+		{
+			name:    "simple Chart.yaml",
+			content: "apiVersion: v2\nname: test\nversion: v1.0.0",
+			info: ReleaseInfo{
+				Version: "v2.0.5",
+			},
+			want:    "apiVersion: v2\nname: test\nversion: v2.0.5",
+			wantErr: assert.NoError,
+		},
+		{
+			name:    "complex Chart.yaml",
+			content: "apiVersion: v2\nname: test\ndescription: testing version update against complex Chart.yaml\ntype: application\nkeywords:\n  - testing\n  - version\n  - update\nversion: 1.0.0\nhome: https://apricote.github.io/releaser-pleaser/\ndependencies:\n  - name: somechart\n    version: 1.2.3\n",
+			info: ReleaseInfo{
+				Version: "v2.0.0",
+			},
+			want:    "apiVersion: v2\nname: test\ndescription: testing version update against complex Chart.yaml\ntype: application\nkeywords:\n  - testing\n  - version\n  - update\nversion: v2.0.0\nhome: https://apricote.github.io/releaser-pleaser/\ndependencies:\n  - name: somechart\n    version: 1.2.3\n",
+			wantErr: assert.NoError,
+		},
+		{
+			name:    "invalid yaml",
+			content: `not yaml`,
+			info: ReleaseInfo{
+				Version: "v2.0.0",
+			},
+			want:    `not yaml`,
+			wantErr: assert.NoError,
+		},
+		{
+			name:    "yaml without version",
+			content: `apiVersion: v2\nname: test`,
+			info: ReleaseInfo{
+				Version: "v2.0.0",
+			},
+			want:    `apiVersion: v2\nname: test`,
+			wantErr: assert.NoError,
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			runUpdaterTest(t, HelmChart(), tt)
+		})
+	}
+}