102 lines
2.5 KiB
Go
102 lines
2.5 KiB
Go
 
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package changelog
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import (
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"errors"
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"fmt"
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"os"
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"regexp"
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"strings"
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"time"
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"git.k3nny.fr/releaser/internal/commits"
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)
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var headerSubjectRe = regexp.MustCompile(`(?i)^\w+(?:\([^)]*\))?!?\s*:\s*(.+)`)
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// Update inserts a new release section into the CHANGELOG file at path.
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// If the file does not exist it is created with a standard header.
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// Only commits with a releasable type (fix, feat, breaking) produce bullets;
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// if none are found the file is left untouched.
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func Update(path, tag, version string, messages []string) error {
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section := buildSection(version, messages)
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if section == "" {
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return nil
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}
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existing := ""
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data, err := os.ReadFile(path)
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if err == nil {
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existing = string(data)
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} else if !errors.Is(err, os.ErrNotExist) {
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return fmt.Errorf("read %s: %w", path, err)
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}
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var out string
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if existing == "" {
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out = "# Changelog\n\nAll notable changes to this project will be documented in this file.\n\n" +
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section + "\n"
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} else {
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// Insert above the first ## [ heading so newest release is always at top.
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if idx := strings.Index(existing, "\n## ["); idx >= 0 {
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out = existing[:idx+1] + section + "\n\n" + existing[idx+1:]
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} else {
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out = strings.TrimRight(existing, "\n") + "\n\n" + section + "\n"
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}
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}
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return os.WriteFile(path, []byte(out), 0644)
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}
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func buildSection(version string, messages []string) string {
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var breaking, feats, fixes []string
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for _, msg := range messages {
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t := commits.Parse(msg)
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if t == commits.TypeNone {
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continue
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}
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first := strings.SplitN(strings.TrimSpace(msg), "\n", 2)[0]
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subject := extractSubject(first)
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switch t {
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case commits.TypeBreaking:
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breaking = append(breaking, subject)
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case commits.TypeFeat:
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feats = append(feats, subject)
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case commits.TypeFix:
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fixes = append(fixes, subject)
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}
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}
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if len(breaking)+len(feats)+len(fixes) == 0 {
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return ""
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}
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date := time.Now().Format("2006-01-02")
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var sb strings.Builder
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fmt.Fprintf(&sb, "## [%s] - %s\n", version, date)
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writeSection(&sb, "Breaking Changes", breaking)
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writeSection(&sb, "Added", feats)
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writeSection(&sb, "Fixed", fixes)
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return strings.TrimRight(sb.String(), "\n")
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}
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func writeSection(sb *strings.Builder, title string, items []string) {
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if len(items) == 0 {
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return
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}
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fmt.Fprintf(sb, "\n### %s\n", title)
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for _, item := range items {
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fmt.Fprintf(sb, "- %s\n", item)
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}
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}
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func extractSubject(header string) string {
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m := headerSubjectRe.FindStringSubmatch(header)
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if m != nil {
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return strings.TrimSpace(m[1])
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}
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return strings.TrimSpace(header)
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}
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