private parseModule()

in src/targets/go.ts [234:285]
28 lines of code
8 McCabe index (conditional complexity)

  private parseModule(modFile: string): GoModule {

    const version = this.extractVersion(path.dirname(modFile));
    const majorVersion = Number(version.split('.')[0]);

    // extract the module decleration (e.g 'module github.com/aws/constructs-go/constructs/v3')
    const match = fs.readFileSync(modFile).toString().match(/module (.*)/);
    if (!match || !match[1]) {
      throw new Error(`Unable to detected module declaration in ${modFile}`);
    }

    // e.g 'github.com/aws/constructs-go/constructs/v3'
    const cannonicalName = match[1];

    // e.g ['github.com', 'aws', 'constructs-go', 'constructs', 'v3']
    const cannonicalNameParts = cannonicalName.split('/');

    // e.g 'github.com/aws/constructs-go'
    const repoURL = cannonicalNameParts.slice(0, 3).join('/');

    // e.g 'v3'
    const majorVersionSuffix = majorVersion > 1 ? `/v${majorVersion}` : '';

    if (!cannonicalName.endsWith(majorVersionSuffix)) {
      throw new Error(`Module declaration in '${modFile}' expected to end with '${majorVersionSuffix}' since its major version is larger than 1`);
    }

    if (!repoURL.startsWith('github.com')) {
      throw new Error(`Repository must be hosted on github.com. Found: '${repoURL}' in ${modFile}`);
    }

    let repoPath = cannonicalNameParts
      .slice(3) // e.g ['constructs', 'v3']
      .join('/'); // e.g 'constructs/v3'

    // we could have something like
    // constructs/v3
    // or something like
    // constructsv3/v3
    // we only want to strip the last 'v3'
    const split = repoPath.split('/');
    if (split[split.length - 1] === `v${majorVersion}`) {
      split.pop();
      repoPath = split.join('/');
    }

    // strip '/' if exists (wont exist for top level modules)
    repoPath = repoPath.endsWith('/') ? repoPath.substr(0, repoPath.length - 1) : repoPath;

    return { modFile, version, cannonicalName, repoPath, repoURL };

  }