hugo-sandstorm/bin/update_changelogs

#!/usr/bin/env ruby

SANDSTORM_CHANGELOG = ".sandstorm/changelog.md"
CHANGELOG = "CHANGELOG.md"

SANDSTORM_VERSION_FILE = ".sandstorm/app-marketing-version"
HUGO_VERSION_FILE = "hugo-version"

HUGO_VERSION = File.read(HUGO_VERSION_FILE).chomp

[
  [SANDSTORM_CHANGELOG, SANDSTORM_VERSION_FILE],
  [CHANGELOG, HUGO_VERSION_FILE]
].each do |(changelog, version_file)|
  data = File.readlines(changelog).map(&:chomp)
  version = File.read(version_file).chomp

  unless data.any? { |line| line[version] }
    data = [
      "## #{version}",
      "",
      "* Upgrade Hugo to #{HUGO_VERSION} extended",
      ""
    ].concat(data)

    File.open(changelog, 'w') { |fh| fh.print data.join("\n") + "\n" }
  end
end