Function getVersionFromFileContent

src/util.ts:130–181

(
  content: string,
  distributionName: string,
  versionFile: string
)

}

export function getVersionFromFileContent(
  content: string,
  distributionName: string,
  versionFile: string
): string | null {
  let javaVersionRegExp: RegExp;

  function getFileName(versionFile: string) {
    return path.basename(versionFile);
  }

  const versionFileName = getFileName(versionFile);
  if (versionFileName == '.tool-versions') {
    javaVersionRegExp =
      /^java\s+(?:\S*-)?(?<version>\d+(?:\.\d+)*([+_.-](?:openj9[-._]?\d[\w.-]*|java\d+|jre[-_\w]*|OpenJDK\d+[\w_.-]*|[a-z0-9]+))*)/im;
  } else if (versionFileName == '.sdkmanrc') {
    javaVersionRegExp = /^java\s*=\s*(?<version>[^-]+)/m;
  } else {
    javaVersionRegExp = /(?<version>(?<=(^|\s|-))(\d+\S*))(\s|$)/;
  }

  const capturedVersion = content.match(javaVersionRegExp)?.groups?.version
    ? (content.match(javaVersionRegExp)?.groups?.version as string)
    : '';

  core.debug(
    `Parsed version '${capturedVersion}' from file '${versionFileName}'`
  );
  if (!capturedVersion) {
    return null;
  }

  const tentativeVersion = avoidOldNotation(capturedVersion);
  const rawVersion = tentativeVersion.split('-')[0];

  let version = semver.validRange(rawVersion)
    ? tentativeVersion
    : semver.coerce(tentativeVersion);

  core.debug(`Range version from file is '${version}'`);

  if (!version) {
    return null;
  }

  if (DISTRIBUTIONS_ONLY_MAJOR_VERSION.includes(distributionName)) {
    const coerceVersion = semver.coerce(version) ?? version;
    version = semver.major(coerceVersion).toString();
  }

  return version.toString();
}

// By convention, action expects version 8 in the format `8.*` instead of `1.8`
function avoidOldNotation(content: string): string {