LSP ͷྗΛ࢖ͬͯ Ruby ͢Δʂ @blue_1617

Who Am I ‣ ΤϜεϦʔגࣜձࣾ Ͱ Ϋϥ΢υిࢠΧϧς Λ։ൃ blue (@blue_1617) ‣ Ruby, JavaScript, Scala etc Λ׆༻ https://blue0513.github.io/show_room/ ‣ Emacs ޷͖ͷΤϯδχΞ 2 ࠷ۙͷ LT ͱ͔ ‣ Emacs Ͱ LSP Λ࢖ͬͯΈͨΑ ‣ Emacs Ͱ Web αʔϏεΛ։ൃͯ͠8ϲ݄͕ܦͪ·ͨ͠ ‣ 2018೥Ͱ΋ʢԶ͸ʣEmacs Λ࢖͍͍ͨ ‣ VTuber ͬͯ஌ͬͯ·͢ʁ ‣ VTuber Λࢧ͑Δٕज़ ۙگͱ͔ ‣ ౬ͨΜΆΛങͬͯշ຾ͯ͠Δ (´ɾωɾ`)

Who Am I ‣ ΤϜεϦʔגࣜձࣾ Ͱ Ϋϥ΢υిࢠΧϧς Λ։ൃ blue (@blue_1617) ‣ Ruby, JavaScript, Scala etc Λ׆༻ https://blue0513.github.io/show_room/ ‣ Emacs ޷͖ͷΤϯδχΞ 3 ࠷ۙͷ LT ͱ͔ ‣ Emacs Ͱ LSP Λ࢖ͬͯΈͨΑ ‣ Emacs Ͱ Web αʔϏεΛ։ൃͯ͠8ϲ݄͕ܦͪ·ͨ͠ ‣ 2018೥Ͱ΋ʢԶ͸ʣEmacs Λ࢖͍͍ͨ ‣ VTuber ͬͯ஌ͬͯ·͢ʁ ‣ VTuber Λࢧ͑Δٕज़ ۙگͱ͔ ‣ ౬ͨΜΆΛങͬͯշ຾ͯ͠Δ (´ɾωɾ`) We are Hiring !! M3, Inc.

ࣄͷൃ୺ ~ LSP ͕ੌ͍ͱฉ͍ͯ ~ Emacs Ͱ Ruby ॻ͍ͯΔͱ ิ׬ͱ͔ఆٛࢀরͭΒ͘ͳ͍....ʁ ʮRuby ͷؾ͕࣋ͪղΒͳ͍.....ʯ ʮิ׬Ͱ͖ͳ͍.....ʯ 4

LSP Λ࢖͏ͱิ׬͕ڧ͘ͳΔʂʁ LSP ʮRuby ͷؾ͕࣋ͪ෼͔Δʂʯ ʮิ׬͕Ͱ͖ΔɺͰ͖Δͧʂʯ ࣄͷൃ୺ ~ LSP ͕ੌ͍ͱฉ͍ͯ ~ 5

LSP Λ࢖͏ͱิ׬͕ڧ͘ͳΔʂʁ LSP ʮRuby ͷؾ͕࣋ͪ෼͔Δʂʯ ʮิ׬͕Ͱ͖ΔɺͰ͖Δͧʂʯ ࣄͷൃ୺ ~ LSP ͕ੌ͍ͱฉ͍ͯ ~ LSP Ͱ Ruby ͷิ׬ΛڧԽ͍ͨ͠ʂ 6

LSPͱ͸ʁ Language Server Protocol (JSON-RPC) Development Tool Notification: textDocument/didChange; Params: {documentURI, changes} Notification: textDocument/publishDiagnostics; Params: Diagnostic[] Language Server Request: textDocument/definition; Params: {documentURI, position} Notification: textDocument/didOpen; Params: document Open document Edit document Goto definition Publish Publish Response: textDocument/definition; Result: Location https://microsoft.github.io/language-server-protocol/overview 7

LSPͱ͸ʁ Language Server Protocol (JSON-RPC) Notification: textDocument/didChange; Params: {documentURI, changes} Notification: textDocument/publishDiagnostics; Params: Diagnostic[] Language Server Request: textDocument/definition; Params: {documentURI, position} Notification: textDocument/didOpen; Params: document Open document Edit document Goto definition Publish Publish Response: textDocument/definition; Result: Location https://microsoft.github.io/language-server-protocol/overview Development Tool ΤσΟλͱ͔ 8

LSPͱ͸ʁ Language Server Protocol (JSON-RPC) Development Tool Notification: textDocument/didChange; Params: {documentURI, changes} Notification: textDocument/publishDiagnostics; Params: Diagnostic[] Request: textDocument/definition; Params: {documentURI, position} Notification: textDocument/didOpen; Params: document Open document Edit document Goto definition Publish Publish Response: textDocument/definition; Result: Location https://microsoft.github.io/language-server-protocol/overview Language Server ιʔείʔυͷղੳΛͯ͘͠ΕΔαʔό ʢϩʔΧϧʹཱͯΒΕΔʣ 9

LSPͱ͸ʁ https://microsoft.github.io/language-server-protocol/implementors/servers/ ݴޠ͝ͱͷ Language Server ʢ܈༤ׂڌͳঢ়ଶʣ 10

LSPͱ͸ʁ Development Tool Notification: textDocument/didChange; Params: {documentURI, changes} Notification: textDocument/publishDiagnostics; Params: Diagnostic[] Request: textDocument/definition; Params: {documentURI, position} Notification: textDocument/didOpen; Params: document Open document Edit document Goto definition Publish Publish Response: textDocument/definition; Result: Location https://microsoft.github.io/language-server-protocol/overview Language Server ͜Ε͕ LSP ΤσΟλͱαʔόؒͷ௨৴ϓϩτίϧ Language Server Protocol (JSON-RPC) 11

LSPͱ͸ʁ Language Server Protocol (JSON-RPC) Development Tool Notification: textDocument/didChange; Params: {documentURI, changes} Notification: textDocument/publishDiagnostics; Params: Diagnostic[] Language Server Request: textDocument/definition; Params: {documentURI, position} Notification: textDocument/didOpen; Params: document Open document Edit document Goto definition Publish Publish Response: textDocument/definition; Result: Location https://microsoft.github.io/language-server-protocol/overview 12

LSPͱ͸ʁ Language Server Protocol (LSP) ͱ͸..... ݴޠͷղੳͳͲΛߦ͏ Language Server ͱ֤πʔϧʢClientʣ͕ ௨৴ɾ࿈ܞ͢ΔࡍͷϓϩτίϧΛنఆ͢Δ΋ͷ ‣ ֤πʔϧ͸ Language Server ͕ͲͷݴޠΛѻ͍ͬͯΔ͔Λҙࣝ͢ Δ͜ͱͳ͘ɺิ׬΍ఆٛࢀরΛߦ͑Δ ϝϦοτ͸..... https://microsoft.github.io/language-server-protocol/ ‣ Emacs ౳ͷΤσΟλͷ ิ׬ɾఆٛࢀরೳྗ౳͕޲্ ͢Δ 13

LSPͱ͸ʁ Language Server Protocol (LSP) ͱ͸..... ݴޠͷղੳͳͲΛߦ͏ Language Server ͱ֤πʔϧʢClientʣ͕ ௨৴ɾ࿈ܞ͢ΔࡍͷϓϩτίϧΛنఆ͢Δ΋ͷ ‣ ֤πʔϧ͸ Language Server ͕ͲͷݴޠΛѻ͍ͬͯΔ͔Λҙࣝ͢ Δ͜ͱͳ͘ɺิ׬΍ఆٛࢀরΛߦ͑Δ ϝϦοτ͸..... https://microsoft.github.io/language-server-protocol/ ‣ Emacs ౳ͷΤσΟλͷ ิ׬ɾఆٛࢀরೳྗ౳͕޲্ ͢Δ LSP Ͱ Ruby ͷิ׬͕ڧ͘ͳΔʂ 14

Emacs Ͱ LSP Λ׆༻ͯ͠ΈΔ Developer Tool Language Server Language Server Protocol (JSON-RPC) (Host) Development Tool Ruby JavaScript Java Request: textDocument/definition Response: Location https://microsoft.github.io/language-server-protocol/overview 15

Demo (Emacs & LSP) 16

ઃఆ Language Server : solargraph Client Package : eglot EmacsͰLSPΛ׆༻ͯ͠ΈΔ (https://qiita.com/blue0513/items/acc962738c7f4da26656) https://github.com/joaotavora/eglot https://github.com/castwide/solargraph Step1. Install Language Server Step2. Edit init.el $ gem install solargraph (add-hook 'ruby-mode-hook 'eglot-ensure) 17

ิ׬ ‣ String.class ͳΒɺto_i ͕αδΣετ͞ΕΔ ‣ Array.class ͳΒɺto_h ͕αδΣετ͞ΕΔ 18

ิ׬ ‣ String.class ͳΒɺto_i ͕αδΣετ͞ΕΔ ‣ Array.class ͳΒɺto_h ͕αδΣετ͞ΕΔ ಈը 19

ิ׬ ‣ Πϯελϯεϝιου ΋αδΣετ͞ΕΔ ‣ `Subscription#to_param` ΛαδΣετ 20

ิ׬ ‣ Πϯελϯεϝιου ΋αδΣετ͞ΕΔ ‣ `Subscription#to_param` ΛαδΣετ ಈը 21

ఆٛࢀর 22

ఆٛࢀর `Subscription.confirm` ʹఆٛδϟϯϓ͢Δʂ ಈը 23

ࢀরݕࡧ 'Subscription.confirm' ͷࢀরՕॴΛݕࡧ͢Δʂ 24

ࢀরݕࡧ ಈը 25

͓·͚ ~ Rails ͷิ׬ ~ $ yard gems $ solargraph config 3. `.solargraph.yml` Λฤू 2. `.solargraph.yml` Λੜ੒ 1. Installed gem ʹ document ੜ੒ https://github.com/castwide/solargraph/issues/87 26

͓·͚ ~ Rails ͷิ׬ ~ `ActiveRecord` ͳͲ͕ީิͱͯ͠αδΣετ͞ΕΔʂ 27

͓·͚ ~ Rails ͷิ׬ ~ `ActiveRecord` ͳͲ͕ީิͱͯ͠αδΣετ͞ΕΔʂ LSP Ͱշదͳ Ruby ίʔσΟϯά 28

Ruby Ͱ LSP Λࢼͨ͠ײ૝ ‣ ิ׬ɾఆٛࢀরɾࢀরݕࡧ͸͔ͳΓߴϨϕϧ ‣ Good Point ‣ Problematic Point ‣ ಋೖ͕ͱͯ΋खܰ ‣ େن໛ϓϩδΣΫτͩͱগ͠ಈ࡞͕ॏ͍ ‣ খن໛ϓϩδΣΫτͳΒߴ଎ಈ࡞ ‣ Language Server & Client ͕܈༤ׂڌ 29

࠷ޙʹ ‣ LSP ͸ੌ͍ ‣ Ruby Project Ͱ΋ิ׬΍ఆٛࢀরΛ࣮ߦ ‣ εϐʔυײ͋;ΕΔ։ൃʢLanguage Server & Clientʣ LSP Ͱ Ruby ָ͕ʹʂ ‣ ֎෦ gem ͷఆٛࢀর΋ OKʂ ‣ ඪ४ϝιουҎ֎ͷิ׬΋ OKʂ ‣ Rails ͷαϙʔτ΋ॆ࣮ ‣ Emacs ΍ Vim ౳ͷΤσΟλͰ΋շదʹ Ruby ͕ॻ͚Δ 30