Function checkDiff

src/main.ts:330–395

(sha: string, version: string)

}

async function checkDiff(sha: string, version: string) {
  try {
    const commit = await getCommit(sha)
    const pkg = commit.files.find((f) => f.filename == packageFileName)
    if (!pkg) {
      info(`- ${sha.substr(0, 7)}: no changes to the package file`)
      return false
    }

    const versionLines: {
      added?: string
      deleted?: string
    } = {}

    const rawLines = pkg.patch
      .split('\n')
      .filter(
        (line) => line.includes('"version":') && ['+', '-'].includes(line[0])
      )
    if (rawLines.length > 2) {
      info(`- ${sha.substr(0, 7)}: too many version lines`)
      return false
    }

    for (const line of rawLines)
      versionLines[line.startsWith('+') ? 'added' : 'deleted'] = line
    if (!versionLines.added) {
      info(`- ${sha.substr(0, 7)}: no "+ version" line`)
      return false
    }

    const versions = {
      added:
        assumeSameVersion == 'new'
          ? version
          : parseVersionLine(versionLines.added),
      deleted:
        assumeSameVersion == 'old'
          ? version
          : !!versionLines.deleted && parseVersionLine(versionLines.deleted)
    }
    if (versions.added != version && !assumeSameVersion) {
      info(
        `- ${sha.substr(
          0,
          7
        )}: added version doesn't match current one (added: "${
          versions.added
        }"; current: "${version}")`
      )
      return false
    }

    output('changed', true)
    output('version', version)
    if (versions.deleted)
      output('type', semverDiff(versions.deleted, versions.added as string))
    output('commit', commit.sha)