CLIツールにSwift Concurrencyを適用させようとしている話

2022/04/25@Swift愛好会 vol.67

Transcript

1. !@LJ
   $-*πʔϧʹ4XJGU$PODVSSFODZ
   Λద༻ͤͨ͞Α͏ͱ͍ͯ͠Δ࿩
   .PO
   
   4XJGUѪ޷ձWPM
   

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2. 1SFTFOUFS
   struct Me {
   
   
   let name = "Takuhiro Muta"
   
   
   let aka = "417.72KI"
   
   
   let company = "***"
   
   
   let twitter = "417_72ki"
   
   
   let qiita = "417_72ki"
   
   
   let gitHub = "417-72KI"
   
   
   let products = [
   
   
   "MockUserDefaults",
   
   
   "MultipartFormDataParser",
   
   
   "BuildConfig.swift",
   
   
   "SSGH"
   
   
   ]
   
   
   let contributing = [
   
   
   "Danger-Swift",
   
   
   "octokit.swift",
   
   
   "etc..."
   
   
   ]
   
   
   }
   

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3. 44()
   IUUQTRJJUBDPN@LJJUFNTCEECFFGDE
   

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4. 44()
   

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5. .PUJWBUJPO
   w BTZODBXBJUʹؔ͢Δهࣄ͕J04ؔ࿈ͷ΋ͷ͹͔ΓͰ$-*πʔϧʹݴٴͨ͠ه
   ࣄΛݟ͔͚ͳ͔ͬͨ
   w 4XJGU͔Β-JOVYͰ΋4XJGU$PODVSSFODZ͕࢖͑ΔΑ͏ʹͳͬͨ
   w Ҏલ͸%JTQBUDI4FNBQIPSFΛ࢖ͬͨॲཧͷϒϩοΩϯά͕ඞཁ
   ˞%JTQBUDI.BJOΛ࢖͏ํ๏͕͋ΔΒ͍͚͠Ͳ΍Γํ෼͔ΒΜͷͰׂѪ
   w BTZODBXBJUΛ࢖͏͜ͱͰγϯϓϧʹॻ͖׵͑Δ͜ͱ͕Ͱ͖Δ͸ͣ
   

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6. .PEVMFT
   44()
   44()$PSF
   (JU)VC"1*
   TXJGUBSHVNFOUQBSTFS
   PDUPLJUTXJGU
   

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7. .PEVMFT
   targets: [
   
   
   .executableTarget(
   
   
   name: "SSGH",
   
   
   dependencies: [
   
   
   .product(name: "ArgumentParser", package: "swift-argument-parser"),
   
   
   "SSGHCore"
   
   
   ]
   
   
   ),
   
   
   .target(
   
   
   name: "SSGHCore",
   
   
   dependencies: ["GitHubAPI"]
   
   
   ),
   
   
   .target(
   
   
   name: "GitHubAPI",
   
   
   dependencies: ["OctoKit"]
   
   
   ),
   
   
   

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8. 1SFQBSBUJPO
   

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9. 1SFQBSBUJPO
   w TXJGUBSHVNFOUQBSTFSΛҎ্ʹ্͛Δ
   

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10. 1SFQBSBUJPO
    w PDUPLJUTXJGUʹDPOUSJCVUF͢Δ
    

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11. 1SFQBSBUJPO
    w 3FRVFTU,JU PDUPLJUTXJGUͷCBTF
    ʹDPOUSJCVUF͢Δ
    

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12. (JU)VC$MJFOU
    #FGPSF
    extension GitHubClientImpl {
    
    
    public func getUser(by userId: String) -> Result {
    
    
    var result: Result!
    
    
    let semaphore = DispatchSemaphore(value: 0)
    
    
    octoKit.user(session, name: userId) {
    
    
    result = $0
    
    
    semaphore.signal()
    
    
    }
    
    
    semaphore.wait()
    
    
    return result.map(User.init)
    
    
    .mapError {
    
    
    if ($0 as NSError).code == 404 {
    
    
    return .userNotFound(userId)
    
    
    }
    
    
    return .other($0)
    
    
    }
    
    
    }
    
    
    }
    

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13. (JU)VC$MJFOU
    "GUFS
    extension GitHubClientImpl {
    
    
    public func getUser(by userId: String) async throws -> User {
    
    
    try await withCheckedThrowingContinuation { continuation in
    
    
    octoKit.user(session, name: userId) {
    
    
    switch $0 {
    
    
    case let .success(result):
    
    
    continuation.resume(returning: User(result))
    
    
    case let .failure(error):
    
    
    if (error as NSError).code == 404 {
    
    
    continuation.resume(throwing: GitHubAPIError.userNotFound(userId))
    
    
    } else {
    
    
    continuation.resume(throwing: GitHubAPIError.other(error))
    
    
    }
    
    
    }
    
    
    }
    
    
    }
    
    
    }
    
    
    }
    

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14. $PSF
    #FGPSF
    func execute(mode: Mode) throws {
    
    
    switch mode {
    
    
    case let .specifiedTargets(targets):
    
    
    try targets.compactMap {
    
    
    switch gitHubClient.getUser(by: $0) {
    
    
    case let .success(user):
    
    
    return user
    
    
    case let .failure(error):
    
    
    dumpWarn(error)
    
    
    return nil
    
    
    }
    
    
    }
    
    
    .forEach(star(to:))
    
    
    }
    
    
    }
    

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15. $PSF
    "GUFS
    func execute(mode: Mode) async throws {
    
    
    switch mode {
    
    
    case let .specifiedTargets(targets):
    
    
    for target in targets {
    
    
    do {
    
    
    let user = try await gitHubClient.getUser(by: target)
    
    
    try await star(to: user)
    
    
    } catch {
    
    
    dumpWarn(error)
    
    
    }
    
    
    }
    
    
    }
    
    
    }
    
    
    

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16. 1BSTBCMF$PNNBOE
    #FGPSF
    @main
    
    
    struct SSGH: ParsableCommand {
    
    
    @Argument(help: "GitHub user name to give stars.")
    
    
    var targets: [String]
    
    
    @Option(name: [.customLong("github-token"), .customShort("t")],
    
    
    help: "GitHub Token to give stars. If not set, use `SSGH_TOKEN` in environment.")
    
    
    var gitHubToken: String?
    
    
    @Flag(name: [.customLong("dry-run"), .short], help: "dry-run mode. Only fetch lists to give stars.")
    
    
    var dryRunMode = false
    
    
    }
    
    
    

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17. 1BSTBCMF$PNNBOE
    "GUFS d
    
    @main
    
    
    struct SSGH: AsyncParsableCommand {
    
    
    @Argument(help: "GitHub user name to give stars.")
    
    
    var targets: [String]
    
    
    @Option(name: [.customLong("github-token"), .customShort("t")],
    
    
    help: "GitHub Token to give stars. If not set, use `SSGH_TOKEN` in environment.")
    
    
    var gitHubToken: String?
    
    
    @Flag(name: [.customLong("dry-run"), .short], help: "dry-run mode. Only fetch lists to give stars.")
    
    
    var dryRunMode = false
    
    
    }
    
    
    

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18. 1BSTBCMF$PNNBOE
    "GUFS d
    
    @main
    
    
    enum Main: AsyncMainProtocol {
    
    
    typealias Command = SSGH
    
    
    }
    
    
    struct SSGH: AsyncParsableCommand {
    
    
    @Argument(help: "GitHub user name to give stars.")
    
    
    var targets: [String]
    
    
    @Option(name: [.customLong("github-token"), .customShort("t")],
    
    
    help: "GitHub Token to give stars. If not set, use `SSGH_TOKEN` in environment.")
    
    
    var gitHubToken: String?
    
    
    @Flag(name: [.customLong("dry-run"), .short], help: "dry-run mode. Only fetch lists to give stars.")
    
    
    var dryRunMode = false
    
    
    }
    
    
    IUUQTHJUIVCDPNBQQMFTXJGUBSHVNFOUQBSTFSQVMM
    

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19. 1BSTBCMF$PNNBOESVO
    
    #FGPSF
    extension SSGH {
    
    
    func run() throws {
    
    
    let gitHubToken = try gitHubToken ?? (try Environment.getValue(forKey: .gitHubToken))
    
    
    let core = SSGHCore(
    
    
    gitHubToken: gitHubToken,
    
    
    dryRunMode: dryRunMode
    
    
    )
    
    
    do {
    
    
    try core.execute(mode: . specifiedTargets(targets))
    
    
    } catch {
    
    
    dumpError(error)
    
    
    Self.exit(withError: error)
    
    
    }
    
    
    }
    
    
    }
    
    
    

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20. 1BSTBCMF$PNNBOESVO
    
    "GUFS d
    
    extension SSGH {
    
    
    func run() async throws {
    
    
    let gitHubToken = try gitHubToken ?? (try Environment.getValue(forKey: .gitHubToken))
    
    
    let core = SSGHCore(
    
    
    gitHubToken: gitHubToken,
    
    
    dryRunMode: dryRunMode
    
    
    )
    
    
    do {
    
    
    try await core.execute(mode: .specifiedTargets(targets))
    
    
    } catch {
    
    
    dumpError(error)
    
    
    Self.exit(withError: error)
    
    
    }
    
    
    }
    
    
    }
    
    
    

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21. BTZODBXBJU׬શʹཧղͨ͠😊
    

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22. ͱ͍͏ເΛݟͨΜͩ
    

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23. *TTVFTXJUI4XJGU$PODVSSFODZ
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    w IUUQTEFWFMPQFSBQQMFDPNEPDVNFOUBUJPOYDPEFSFMFBTFOPUFTYDPEF@
    SFMFBTFOPUFT
    w IUUQTGPSVNTTXJGUPSHUTXJGUDPODVSSFODZCBDLEFQMPZJTTVF
    w IUUQTGPSVNTTXJGUPSHUBTZODBXBJUDSBTIPOJPTXJUIYDPEF
    w J04ɺUW04ɺXBUDI04ʹ͔͠ݴٴ͞Ε͍ͯͳ͍͕NBD04΋ಉ༷ͱߟ͑ΒΕΔ
    w ࣄ্࣮SFRVJSFE9DPEF
    

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24. *TTVFTXJUI4XJGU$PODVSSFODZ
    w NBD04Ͱಈ͔͢ͱΫϥογϡ͢Δ
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25. &OBCMF4XJGU$PODVSSFODZ
    w 9DPEFͰಈ͔ͨ͢ΊʹXPSL
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    PXΛߋ৽͢Δ
    

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26. &OBCMF4XJGU$PODVSSFODZ
    w (JU)VC"DUJPOT্ͷNBD04͸·ͩQSJWBUFCFUB ݱࡏ
    ͳͷͰ
    

    BDDFTTSFRVFTUΛ౤͛Δ
    

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27. 5FTUQBTTFT😊
    IUUQTHJUIVCDPN,*44()BDUJPOTSVOT
    

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28. 5FTUQBTTFT😊
    IUUQTHJUIVCDPN,*44()BDUJPOTSVOT
    

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29. *NQSFTTJPO$PODMVTJPO
    w BTZODBXBJUͰॻ͘ͱγϯϓϧʹͳͬͨ ؾ͕͢Δ
    
    w %JTQBUDI4FNBQIPSFΑΓ͸ԯഒϚγ
    w "DUPSͷ֓೦ΛJ04։ൃ΍NBD04։ൃ΄Ͳؾʹ͠ͳͯ͘ྑ͍ͷͰ
    

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    w .POUFSFZ͡Όͳ͍ͱಈ࡞֬ೝͰ͖ͳ͍ͷ͕೉఺
    

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30. ࠷ޙʹ
    

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31. ελʔ͍ͩ͘͞
    IUUQTHJUIVCDPN,*44()
    

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