Function updateAutoversionFile

scripts/releaser/docs.go:314–366

updateAutoversionFile reads a markdown file and replaces version strings in lines following autoversion pragmas for the given channel.

(path, channel, newVer string)

// version strings in lines following autoversion pragmas for
// the given channel.
func updateAutoversionFile(path, channel, newVer string) error {
	content, err := os.ReadFile(path)
	if err != nil {
		return xerrors.Errorf("reading %s: %w", path, err)
	}

	lines := strings.Split(string(content), "\n")
	changed := false

	for i, line := range lines {
		m := autoversionPragmaRe.FindStringSubmatch(line)
		if len(m) < 3 {
			continue
		}
		pragmaChannel := m[1]
		pattern := m[2]

		if pragmaChannel != channel {
			continue
		}

		// Build regex from the pattern by replacing
		// [version] with a capture group.
		escaped := regexp.QuoteMeta(pattern)
		reStr := strings.ReplaceAll(
			escaped,
			regexp.QuoteMeta("[version]"),
			`(\d+\.\d+\.\d+)`,
		)
		re, err := regexp.Compile(reStr)
		if err != nil {
			continue
		}

		// Search the next few lines for a match.
		for j := i + 1; j < len(lines) && j <= i+5; j++ {
			if loc := re.FindStringSubmatchIndex(lines[j]); loc != nil {
				// loc[2]:loc[3] is the version capture
				// group.
				lines[j] = lines[j][:loc[2]] + newVer + lines[j][loc[3]:]
				changed = true
				break
			}
		}
	}

	if !changed {
		return nil
	}

	//nolint:gosec // File permissions match the original.
	return os.WriteFile(path, []byte(strings.Join(lines, "\n")), 0o644)
}

// updateRancherFile updates the version strings in rancher.md.
func updateRancherFile(path, channel, newVer string) error {