Go language serverを理解する / Understanding Go language server

Go 1.12 Release Party in Fukuoka
https://fukuokago.connpass.com/event/118377/

Transcript

1. tools/cmd/gopls
   ࡾ୐༔հ / Pepabo R&D Institute, GMO Pepabo, Inc.
   2019.02.15 Go 1.12 Release Party
   Go language serverΛཧղ͢Δ
   

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2. ϓϦϯγύϧΤϯδχΞ
   ࡾ୐༔հ!NPOPDISPNFHBOF
   (.0ϖύϘגࣜձࣾϖύϘݚڀॴ
   IUUQTCMPHNPOPDISPNFHBOFDPN
   

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3. 1. Language Server Protocol
   2. Go language server
   3. Conclusion
   3
   ໨࣍
   

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4. 1.
   Language Server Protocol
   

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5. l5IF-BOHVBHF4FSWFS1SPUPDPM -41
   EFpOFTUIFQSPUPDPMVTFECFUXFFOBO
   FEJUPSPS*%&BOEBMBOHVBHFTFSWFSUIBUQSPWJEFTMBOHVBHFGFBUVSFTMJLFBVUP
   DPNQMFUF HPUPEFpOJUJPO pOEBMMSFGFSFODFTFUDl
   5
   Language Server Protocol
   4FSWFS1SPUPDPM> IUUQTNJDSPTPGUHJUIVCJPMBOHVBHFTFSWFSQSPUPDPM
   
   w -BOHVBHF4FSWFS1SPUPDPM͸Τσ
   Ολ΍*%&ͱ-BOHVBHF4FSWFSͷؒͰ࢖ΘΕΔ
   ϓϩτίϧ
   w -BOHVBHF4FSWFS͸ΦʔτίϯϓϦʔτ΍ఆٛݩ΁ͷҠಈɼࢀরઌΛݟ͚ͭΔ
   ͱ͍ͬͨzMBOVHBHFGFBUVSFTzΛఏڙ͢Δ
   

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6. • “language features”͸ݴޠ͝ͱʹڞ௨෦෼͕ଟ͍͕ɼݱࡏ͸ɼ։ൃπʔϧ͝
   ͱʹɼͦͷ࣮ߦͱ݁Ռ൓өͷ࣮૷͕ඞཁ (ݴޠ਺ x ։ൃπʔϧ਺)
   • ͦ͜ͰLanguage Server Protocol͸ڞ௨ੑʹண໨͢Δɽ
   • ݴޠ͝ͱͷLanguage ServerͰ”language features”Λ࣮ߦ͠ɼ։ൃπʔϧ͸
   ͦͷ݁Ռ൓өͷΈΛߦ͏ํࣜ (ݴޠ਺ + ։ൃπʔϧ਺)
   • ࣮ࡍʹ͸Language Server΍։ൃπʔϧͷݺͼग़͠ػೳ͸ෳ਺ଘࡏ͢ΔͨΊཧ࿦஋ͱͯ͠ɽ
   6
   ݴޠͱ։ൃπʔϧͷ૊Έ߹ΘͤരൃΛճආ͢Δ
   

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7. • ։ൃπʔϧ͔Βͷ”language features”ͷ໰͍߹Θͤʹରͯ͠ɼॲཧΛ࣮ߦ
   ͠ɼ݁Ռ൓өʹඞཁͳ৘ใΛฦ͢αʔόʔϓϩηε
   • ௨৴Λܦ༝͢Δ͜ͱʹΑΓ։ൃπʔϧͱ”language features”Λ෼཭͢Δ
   • ͲͷॲཧΛ࣮ߦ͢Δ͔ɼ࣮ͦͯ͠ߦ͢ΔͨΊʹඞཁͳύϥϝλͱ݁Ռ൓өʹඞ
   ཁͳύϥϝλͷ࢓༷ΛఆΊͨ΋ͷ͕Language Server Protocol (LSP)
   7
   Language Server
   

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8. • ݱࡏ version 3.x ܥ
   • HeaderͱContentύʔτ͔ΒͳΔ
   • Contentύʔτͷϝοηʔδ෦෼͸JSON-RPCͷ࢓༷Λ
   ࠾༻
   • IDɼϝιου໊ɼύϥϝλ͔ΒͳΔ
   8
   LSP Specification
   4FSWFS1SPUPDPM4QFDJpDBUJPO> IUUQTNJDSPTPGUHJUIVCJPMBOHVBHFTFSWFSQSPUPDPMTQFDJpDBUJPO
   
   Content-Length: ...\r\n
   \r\n
   {
   "jsonrpc": "2.0",
   "id": 1,
   "method": “initialize",
   "params": {
   ...
   }
   }
   • ϦΫΤετ - Ϩεϙϯεͷ૊Έ͔ΒͳΔݺͼग़͠ͷଞɼϦΫΤετͷΈ
   ͷ”Notification”ܗࣜͷݺͼग़͠΋ଘࡏ͢Δ
   • IDΛ͚ͭͳ͍ͱNotification
   

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9. • Notification͸Language Server->։ൃπʔϧ΋ൃߦ͞ΕΔ͜ͱ͔Β઀ଓ͸։
   ͖ͬͺͳ͠ʹ͢Δ
   9
   LSP Specification
   -BOHVBHF
   4FSWFS
   Content-Length: ...\r\n
   \r\n
   {
   "jsonrpc": "2.0",
   "id": 1,
   "method": “initialize",
   "params": {
   ...
   }
   }
   3FRVFTU
   /PUJpDBUJPO
   %FWFMPQNFOU
   UPPM
   Content-Length: ...\r\n
   \r\n
   {
   "jsonrpc": "2.0",
   "method": "textDocument/publishDiagnostics",
   "params": {
   ...
   }
   }
   3FTQPOTF
   

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10. • ݴޠఏڙଆ͸Language ServerΛఏڙ͓ͯ͘͜͠ͱͰʢLSPΛαϙʔτ͢Δʣ
    ։ൃπʔϧ΁ͷରԠ͕׬ྃ͢Δ
    • ։ൃπʔϧଆ͸LSPΛαϙʔτ͢Δ͜ͱͰʢLanguage Server͕ఏڙ͞Ε͍ͯ
    Δʣ৽͍͠ݴޠ޲͚ͷ”language features”ରԠ͕ෆཁʹͳΔ
    • ར༻ऀଆ͸Yet Another Language Server͕ఏڙ͞Εͯ΋։ൃ؀ڥͷ࠶੔උ͕
    ָʹͳΔʢ͜͜ͷݒ೦఺͸ޙड़ʣ
    • αʔόʔϓϩηεͰ͋Δ͜ͱ͔ΒΩϟογϡઓུͷ࠾༻͠΍͘͢։ൃޮ཰޲্
    ΁ͷ৽͍͠Ξϓϩʔν͕ࠓޙग़ͯ͘Δ͔΋
    10
    LSPΛ࠾༻͢ΔϝϦοτ
    

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11. 2.
    Go language server
    

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12. • https://github.com/saibing/bingo
    • Bingo is a Go language server that speaks Language Server Protocol.
    • https://github.com/sourcegraph/go-langserver
    • Go language server to add Go support to editors and other tools that use
    the Language Server Protocol (LSP)
    • https://github.com/golang/tools/tree/master/cmd/gopls
    • The golsp command is an LSP server for Go.
    12
    Go language server
    

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13. IUUQTHJUIVCDPNHPMBOHUPPMTDPNNJUCGEBCGFDDBGDDGF 13
    Go Please!!
    • Go͕ఏڙ͢ΔLanguage Server͸golspͰ͸ͳ͘gopls!!
    

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14. 14
    4FSWFS $MJFOU 4FSWFS $MJFOU
    DBODFM3FRVFTU P P UFYU%PDVNFOUQVCMJTI%JBHOPTUJDT P
    JOJUJBMJ[F P UFYU%PDVNFOUDPNQMFUJPO P
    JOJUJBMJ[FE * DPNQMFUJPO*UFNSFTPMWF Y
    TIVUEPXO P UFYU%PDVNFOUIPWFS P
    FYJU P UFYU%PDVNFOUTJHOBUVSF)FMQ P
    XJOEPXTIPX.FTTBHF P UFYU%PDVNFOUEFDMBSBUJPO
    XJOEPXTIPX.FTTBHF3FRVFTU P UFYU%PDVNFOUEFpOJUJPO P
    XJOEPXMPH.FTTBHF P UFYU%PDVNFOUUZQF%FpOJUJPO P
    UFMFNFUSZFWFOU P UFYU%PDVNFOUJNQMFNFOUBUJPO Y
    DMJFOUSFHJTUFS$BQBCJMJUZ P UFYU%PDVNFOUSFGFSFODFT Y
    DMJFOUVOSFHJTUFS$BQBCJMJUZ P UFYU%PDVNFOUEPDVNFOU)JHIMJHIU Y
    XPSLTQBDFXPSLTQBDF'PMEFST P UFYU%PDVNFOUEPDVNFOU4ZNCPM Y
    XPSLTQBDFEJE$IBOHF8PSLTQBDF'PMEFST Y UFYU%PDVNFOUDPEF"DUJPO P
    XPSLTQBDFEJE$IBOHF$POpHVSBUJPO Y UFYU%PDVNFOUDPEF-FOT *
    XPSLTQBDFDPOpHVSBUJPO P DPEF-FOTSFTPMWF Y
    XPSLTQBDFEJE$IBOHF8BUDIFE'JMFT Y UFYU%PDVNFOUEPDVNFOU-JOL *
    XPSLTQBDFTZNCPM Y EPDVNFOU-JOLSFTPMWF Y
    XPSLTQBDFFYFDVUF$PNNBOE Y UFYU%PDVNFOUEPDVNFOU$PMPS Y
    XPSLTQBDFBQQMZ&EJU P UFYU%PDVNFOUDPMPS1SFTFOUBUJPO Y
    UFYU%PDVNFOUEJE0QFO P UFYU%PDVNFOUGPSNBUUJOH P
    UFYU%PDVNFOUEJE$IBOHF P UFYU%PDVNFOUSBOHF'PSNBUUJOH P
    UFYU%PDVNFOUXJMM4BWF Y UFYU%PDVNFOUPO5ZQF'PSNBUUJOH Y
    UFYU%PDVNFOUXJMM4BWF8BJU6OUJM Y UFYU%PDVNFOUSFOBNF Y
    UFYU%PDVNFOUEJE4BWF * UFYU%PDVNFOUQSFQBSF3FOBNF
    UFYU%PDVNFOUEJE$MPTF P UFYU%PDVNFOUGPMEJOH3BOHF Y
    SFMFBTFCSBODIHP࣌఺ͰͷHPQMTͷ-41αϙʔτঢ়گPJNQMFNFOUFE YOPUJNQMFNFOUFE *JHOPSF
    

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15. ৮ͬͯཧղ͢Δgopls
    

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16. ४උ (Language Server)
    16
    $ go get -u golang.org/x/tools/...
    $ cd $GOPATH/src/golang.org/x/tools
    # Checkout origin/release-branch.go1.12
    $ git checkout 657755b003d86beb7f1e59808a410123ce89b15b
    $ go run cmd/gopls/main.go server -port 8889
    • 2/14࣌఺ͷorigin/master HEADͩͱίέͨͷͰ҆ఆͯͦ͠͏ͳόʔδϣϯ΁
    • “server”͸origin/master HEADͩͱ”serve”
    • σϑΥϧτͰඪ४ೖग़ྗΛར༻ɽ”port”ΦϓγϣϯͰωοτϫʔΫܦ༝΁
    

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17. 17
    ४උ (Development tool)
    // Dial to Language Server
    c, _ := net.Dial("tcp", ":8889")
    // Start client
    conn := jsonrpc2.NewConn(context.Background(,
    jsonrpc2.NewBufferedStream(c, jsonrpc2.VSCodeObjectCodec{}),
    &clientHandler{})
    done := make(chan bool)
    go func() {
    done }()
    • github.com/sourcegraph/jsonrpc2 Λར༻
    • LS͔ΒͷNotificationΛ଴ͪड͚ΔͨΊͷhandlerΛొ࿥͓ͯ͘͠
    

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18. • “The initialize request is sent as the first request from the client to the
    server. “
    • ࠷ॳʹΫϥΠΞϯτ͔ΒinitializeϦΫΤετ͕ඞཁ
    • ύϥϝλʹ͸root directoryͳͲΛࢦఆ͢Δ
    • ݴޠαʔόʔଆ͕ظ଴͢Δಈ࡞ͳͲΛฦ٫͢Δ
    • υΩϡϝϯτͷಉظͷ௨஌͕ཉ͍͠ͳͲ
    18
    ͓࡞๏
    

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19. 19
    Initialize request (cs)
    // Initialize
    fullpath, _ := filepath.Abs(".")
    uri, _ := pathToURI(".") // file:///fullpath/to/content
    docUri := DocumentURI(uri)
    params := InitializeParams{
    RootPath: &fullpath,
    RootURI: &docUri,
    }
    var got interface{}
    err = conn.Call(ctx, "initialize", params, &got)
    if err != nil {
    panic(err)
    }
    • RootPath͸deprecated && RootURI͕༏ઌύϥϝλͱͷ͜ͱͳͷͰෆཁ͔΋
    ͠Εͳ͍
    

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20. Initialize (log)
    20
    [Trace - 1:30:04 AM] Sending request 'initialize -
    (0)'.
    Params: {“processId":null,"rootPath":"/Users/miyakey/
    src/github.com/monochromegane/lsc","rootUri":"file:///
    Users/miyakey/src/github.com/monochromegane/
    lsc","initializationOptions":null,"capabilities":
    {"workspace":{}},"trace":""}
    [Trace - 1:30:04 AM] Received response 'initialize -
    (0)' in 1ms.
    Params: {"capabilities":{"textDocumentSync":
    {"openClose":true,"change":1,"save":
    {}},"hoverProvider":true,"completionProvider":
    {"triggerCharacters":["."]},"signatureHelpProvider":
    {"triggerCharacters":
    ["(",","]},"definitionProvider":true,"typeDefinitionPro
    vider":true,"codeActionProvider":true,"codeLensProvider
    ":
    {},"documentFormattingProvider":true,"documentRangeForm
    attingProvider":true,"documentOnTypeFormattingProvider"
    :{"firstTriggerCharacter":""},"documentLinkProvider":
    {},"executeCommandProvider":
    {"commands":null},"workspace":{"workspaceFolders":{}}}}
    {
    "capabilities": {
    "codeActionProvider": true,
    "codeLensProvider": {},
    "completionProvider": {
    "triggerCharacters": [
    "."
    ]
    },
    "definitionProvider": true,
    "documentFormattingProvider": true,
    "documentLinkProvider": {},
    "documentOnTypeFormattingProvider": {
    "firstTriggerCharacter": ""
    },
    "documentRangeFormattingProvider": true,
    "executeCommandProvider": {
    "commands": null
    },
    "hoverProvider": true,
    "signatureHelpProvider": {
    "triggerCharacters": ["(", ","]
    },
    "textDocumentSync": {
    "change": 1,
    "openClose": true,
    "save": {}
    },
    "typeDefinitionProvider": true,
    "workspace": {
    "workspaceFolders": {}
    }
    }
    }
    -PH 3FTQPOTF
    

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21. textDocument/publishDiagnostics notification (s->c)
    21
    func (h *clientHandler) Handle(ctx context.Context, conn *jsonrpc2.Conn, req
    *jsonrpc2.Request) {
    if !req.Notif {
    return
    }
    switch req.Method {
    case "textDocument/publishDiagnostics":
    var params PublishDiagnosticsParams
    b, _ := req.Params.MarshalJSON()
    json.Unmarshal(b, &params)
    (snip)
    }
    }
    • ΫϥΠΞϯταʔόʔଆͰϋϯυϥͰର৅ͷॲཧʹԠ࣮ͨ͡૷Λߦ͏
    

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22. textDocument/publishDiagnostics (log)
    22
    [Trace - 1:30:06 AM] Received notification
    'textDocument/publishDiagnostics'.
    Params: {"uri":"file:///Users/miyakey/src/github.com/
    monochromegane/lsc/cmd/lsc/main.go","diagnostics":
    [{"range":{"start":{"line":4,"character":5},"end":
    {"line":4,"character":9}},"severity":
    1,"source":"LSP","message":"\tother declaration of
    main"}]}
    [Trace - 1:30:06 AM] Received notification
    'textDocument/publishDiagnostics'.
    Params: {"uri":"file:///Users/miyakey/src/github.com/
    monochromegane/lsc/cmd/lsc/main.g_","diagnostics":
    [{"range":{"start":{"line":2,"character":5},"end":
    {"line":2,"character":9}},"severity":
    1,"source":"LSP","message":"main redeclared in this
    block"},{"range":{"start":{"line":3,"character":
    0},"end":{"line":3,"character":7}},"severity":
    1,"source":"LSP","message":"undeclared name: lsc"}]}
    -PH /PUJpDBUJPO
    {
    "diagnostics": [
    {
    "message": "\tother
    declaration of main",
    "range": {
    "end": {
    "character": 9,
    "line": 4
    },
    "start": {
    "character": 5,
    "line": 4
    }
    },
    "severity": 1,
    "source": "LSP"
    }
    ],
    "uri": "file:///Users/miyakey/src/
    github.com/monochromegane/lsc/cmd/
    lsc/main.go"
    }
    

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23. textDocument/didOpen notification (c->s)
    23
    • ௨஌ͷ৔߹͸”Notify”Λ࢖͏
    • didChangeͷ৔߹ʹversionΛΠϯΫϦϝϯτ͍ͯ͘͠ͱͷ͜ͱɽ
    // DidOpen
    uri, _ = pathToURI("cmd/lsc/main.g_")
    docUri = DocumentURI(uri)
    data, _ := ioutil.ReadFile("cmd/lsc/main.g_")
    openParams := DidOpenTextDocumentParams{
    TextDocument: TextDocumentItem{
    URI: docUri,
    LanguageID: "go",
    Version: 1.0,
    Text: string(data),
    },
    }
    err = conn.Notify(ctx, "textDocument/didOpen", openParams)
    if err != nil {
    panic(err)
    }
    

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24. textDocument/didOpen (log)
    24
    [Trace - 1:30:04 AM] Sending notification
    'textDocument/didOpen'.
    Params: {"textDocument":{"uri":"file:///Users/miyakey/
    src/github.com/monochromegane/lsc/cmd/lsc/
    main.g_","languageId":"go","version":1,"text":"package
    main\n\nfunc main() {\nlsc.Run()\n}\n"}}
    -PH
    

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25. 25
    textDocument/formatting request (cs)
    • gopls͸gofmt૬౰ͷ͜ͱ͔͠͠ͳ͍ (bingoͩͱ͜͜Ͱ࣮ߦ͢Δ)
    • ϑΥʔϚοτޙͷશςΩετͰ͸ͳ͘ɼमਖ਼ՕॴͷΈΛฦ͢ϓϩτίϧʹͳͬ
    ͍ͯΔ
    // Formatting
    formatParams := DocumentFormattingParams{
    TextDocument: TextDocumentIdentifier{
    URI: docUri,
    },
    }
    err = conn.Call(ctx, "textDocument/formatting", formatParams, &got)
    if err != nil {
    panic(err)
    }
    

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26. textDocument/formatting (log)
    26
    [Trace - 1:30:09 AM] Sending request 'textDocument/
    formatting - (1)'.
    Params: {"textDocument":{"uri":"file:///Users/miyakey/
    src/github.com/monochromegane/lsc/cmd/lsc/
    main.g_"},"options":{"tabSize":0,"insertSpaces":false}}
    [Trace - 1:30:09 AM] Received response 'textDocument/
    formatting - (1)' in 1ms.
    Params: [{"range":{"start":{"line":3,"character":
    0},"end":{"line":4,"character":0}},"newText":""},
    {"range":{"start":{"line":4,"character":0},"end":
    {"line":4,"character":0}},"newText":"\tlsc.Run()\n"}]
    -PH 3FTQPOTF
    [
    {
    "newText": "\tlsc.Run()\n",
    "range": {
    "end": {
    "character": 0,
    "line": 4
    },
    "start": {
    "character": 0,
    "line": 4
    }
    }
    }
    ]
    

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27. 27
    textDocument/codeAction request (cs)
    • goplsͷࣗಈimport͸͜ͷΞΫγϣϯʹϚοϐϯά͞Ε͍ͯΔ
    • LSPతʹ͸codeActionContext.onlyΛ࢖ͬͯΞΫγϣϯࢦఆ͕Մೳ͕ͩɼݱ࣌
    ఺Ͱ͸gopls͸ࣗಈimport(source.organizeImports)ΞΫγϣϯͷΈ࣮ߦ͢Δ
    ࣮૷
    // CodeAction
    actParams := CodeActionParams{
    TextDocument: TextDocumentIdentifier{
    URI: docUri,
    },
    }
    err = conn.Call(ctx, "textDocument/codeAction", actParams, &got)
    if err != nil {
    panic(err)
    }
    

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28. textDocument/codeAction (log)
    28
    [Trace - 1:30:09 AM] Sending request 'textDocument/
    codeAction - (2)'.
    Params: {"textDocument":{"uri":"file:///Users/miyakey/
    src/github.com/monochromegane/lsc/cmd/lsc/
    main.g_"},"range":{"start":{"line":0,"character":
    0},"end":{"line":0,"character":0}}}
    [Trace - 1:30:09 AM] Received response 'textDocument/
    codeAction - (2)' in 1ms.
    Params: [{"title":"Organize
    Imports","kind":"source.organizeImports","edit":
    {"changes":{"file:///Users/miyakey/src/github.com/
    monochromegane/lsc/cmd/lsc/main.g_":[{"range":{"start":
    {"line":2,"character":0},"end":{"line":2,"character":
    0}},"newText":"import \"github.com/monochromegane/
    lsc\"\n"},{"range":{"start":{"line":2,"character":
    0},"end":{"line":2,"character":0}},"newText":"\n"},
    {"range":{"start":{"line":3,"character":0},"end":
    {"line":4,"character":0}},"newText":""},{"range":
    {"start":{"line":4,"character":0},"end":{"line":
    4,"character":0}},"newText":"\tlsc.Run()
    \n"}]}},"command":{"title":"","command":""}}]
    -PH 3FTQPOTF
    [
    {
    "command": {
    "command": "",
    "title": ""
    },
    "edit": {
    "changes": {
    "file:///Users/miyakey/src/github.com/
    monochromegane/lsc/cmd/lsc/main.g_": [
    {
    "newText": "import \"github.com/
    monochromegane/lsc\"\n",
    "range": {
    "end": {
    "character": 0,
    "line": 2
    },
    "start": {
    "character": 0,
    "line": 2
    }
    }
    },
    ]
    }
    },
    "kind": "source.organizeImports",
    "title": "Organize Imports"
    }
    ]
    

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29. 29
    textDocument/definition request (cs)
    • definitionͱtypeDefinition͕͋Δ͕goplsͰ͸ಉͬ͡Ά͍
    // Definition
    uri, _ = pathToURI("cmd/lsc/main.go")
    docUri = DocumentURI(uri)
    posParams := TextDocumentPositionParams{
    TextDocument: TextDocumentIdentifier{
    URI: docUri,
    },
    Position: Position{
    Line: 5,
    Character: 5,
    },
    }
    err = conn.Call(ctx, "textDocument/definition", posParams, &got)
    if err != nil {
    panic(err)
    }
    

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30. textDocument/definition (log)
    30
    [Trace - 1:30:09 AM] Sending request 'textDocument/
    definition - (3)'.
    Params: {"textDocument":{"uri":"file:///Users/miyakey/
    src/github.com/monochromegane/lsc/cmd/lsc/
    main.go"},"position":{"line":5,"character":5}}
    [Trace - 1:30:09 AM] Received response 'textDocument/
    definition - (3)' in 0ms.
    Params: [{"uri":"file:///Users/miyakey/src/github.com/
    monochromegane/lsc/lsc.go","range":{"start":{"line":
    17,"character":5},"end":{"line":17,"character":8}}}]
    -PH 3FTQPOTF
    [
    {
    "range": {
    "end": {
    "character": 8,
    "line": 17
    },
    "start": {
    "character": 5,
    "line": 17
    }
    },
    "uri": "file:///Users/
    miyakey/src/github.com/
    monochromegane/lsc/lsc.go"
    }
    ]
    

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31. 31
    exit notification (c->s)
    • exitΞΫγϣϯΛݺͿͱgopls͕ऴྃ
    • `// Exit
    var dummy interface{}
    err = conn.Notify(ctx, "exit", dummy)
    if err != nil {
    panic(err)
    }
    

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32. exit (log)
    32
    [Trace - 1:30:09 AM] Sending notification 'exit'.
    Params: {}
    -PH
    

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33. • Goͷ“language features”͸ैདྷ͔Βఏڙ͞Ε͓ͯΓgopls͸ͦΕΒΛϥοϓ
    ͢Δ͜ͱͰجຊతͳػೳ࣮૷͸໰୊ͳ͘࢖͑ͦ͏ɽ
    • ҰํͰ։ൃπʔϧଆʹٻΊΒΕΔϫʔΫεϖʔε΍υΩϡϝϯτಉظɼγϯλο
    ΫεϋΠϥΠτͳͲ͸͜Ε͔Βɽ
    • ݴޠಠࣗͷ”language features”͕CodeActionʹԡ͠ࠐ·Ε͍͖ͯͦ͏ͳͷͰ
    ͜ͷ͋ͨΓ͸LSPͱLSͷࠓޙͷཱͪճΓΛݟ͍͖͍ͯͨɽ
    • LS͝ͱͷڍಈͷҧ͍΋ىಈΦϓγϣϯʹԡ͠ࠐ·Ε͍ͯ͘ͷͰɼࠩ͠ସ͑Մೳ
    ʹ͢ΔͨΊʹ΋͏Ұ೧Γඞཁͦ͏
    33
    ॴײ
    

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34. 3.
    Conclusion
    

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35. • Language Server ProtocolͷجຊΛֶΜͩ
    • Goͷఏڙ͢ΔLanguage Server - goplsͷݱঢ়Λ֓؍ͨ͠
    • goplsΛGo͔Β৮ͬͯݟͨ
    • LSPʹΑͬͯ։ൃ؀ڥվળ΁ͷߩݙ͕ΑΓଟ͘ͷ؀ڥͰ࢖ͬͯ΋Β͑ΔΑ͏ʹ
    ͳΔͨΊߩݙωλΛߟ͍͖͍͑ͯͨ
    • Go Please ͔Θ͍͍
    • Go
    35
    Conclusion
    

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36. View Slide