Go Language Server 使うべし

by Toshikazu Ohashi

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(P -BOHVBHF 4FSWFS ࢖͏΂͠ (P 6O $POGFSFODFʢ(P͋Μ͜ʣ-5େձLH !MJHIUUJHFS

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-BOHVBHF4FSWFS 1SPUPDPM ͳʹʁͳͥ

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-BOHVBHF4FSWFS ݴޠ։ൃπʔϧΛ౷߹ͨ͠αʔό w ࣗಈิ׬ w ఆٛδϟϯϓ w ࢀরݕࡧFUD -BOHVBHF4FSWFS1SPUPDPM -41 -BOHVBHF4FSWFSͱΫϥΠΞϯτؒͰ࢖༻͢Δϓϩτίϧ w .JDSPTPGU͕࢓༷ࡦఆ 74$PEFͷͨΊʁ w +40/31$ϕʔε -BOHVBHF4FSWFSͱ͸ͳʹ͔

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͜Ε·Ͱ͸ΤσΟλຖʹݴޠπʔϧΛར༻͢ΔϓϥάΠϯ͕ඞཁͩͬͨ w 74$PEFͷ1ZUIPOϓϥάΠϯ w "UPNͷ1ZUIPOϓϥάΠϯ w 7JNͷ1ZUIPOϓϥάΠϯ w 4VCMJNF5FYU &NBDT 4PVSDFHSBQIFUD ݴޠίϛϡχςΟͷ։ൃϦιʔεΛ-BOHVBHF 4FSWFSʹूதͯ͠ߴ඼࣭ͳݴޠ։ൃπʔϧΛ࡞Δ Ϣʔβ͸-41ΛαϙʔτΫϥΠΞϯτΛಋೖͯ͠ ͙͢ʹߴ඼࣭ͳݴޠͷαϙʔτΛڗडͰ͖Δ ͋ͱͰৄ͘͠࿩͠·͢ -BOHVBHF4FSWFS͸ͳͥඞཁ͔

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(Pͷ-BOHVBHF4FSWFS

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ݱঢ়ɺൃల͕ظ଴͞Ε͍ͯΔ(Pͷ-BOHVBHF4FSWFS͸ҎԼͷͭ HPQMT w (Pެࣜͷ-BOVHBHF4FSWFS CJOHP w TPVSDFHSBQIHPMBOHTFSWFSΠϯεύΠϠͷ αʔυύʔςΟ-BOHVBHF4FSWFS

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.FUIPE ػೳ (P5PPMT textDocument/completion ࣗಈิ׬ gocode* textDocument/deﬁnition ఆٛδϟϯϓ godef* textDocument/formatting ϑΥʔϚοτ gofmt textDocument/hover ώϯτදࣔ gogetdoc* textDocument/implementation ܧঝؔ܎ impl textDocument/rename ໊લมߋ gorename* textDocument/references γϯϘϧࢀরݕࡧ guru textDocument/documentSymbol υΩϡϝϯτγϯϘϧݕࡧ guru workspace/symbol ϫʔΫεϖʔεγϯϘϧݕࡧ guru -41ͱ(Pݴޠ։ൃπʔϧ * αʔυύʔςΟ੡πʔϧ

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.FUIPE HPQMT CJOHP textDocument/completion ○ ○ textDocument/deﬁnition ○ ○ textDocument/formatting ○ ○ textDocument/hover ○ ○ textDocument/implementation - ○ textDocument/rename - ○ textDocument/references - ○ textDocument/documentSymbol - ○ workspace/symbol - ○ HPQMTͱCJOHPͷൺֱ 2019/01/28࣌఺Ͱ֤ServerͷCapabilitiesΛऔಘͨ݁͠Ռ

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ͳ͍ͥ· -BOHVBHF4FSWFSͳͷ͔

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ಡΜͰ͍ͩ͘͞ (P"EWFOU$BMFOEBS೔໨ ʰHPDPEF΍Ί·͢ ͦͯ͠-BOHVBHF4FSWFS΁ ʱ IUUQTNBUUOLBPSJZBOFUTPGUXBSFMBOHHPIUN

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࢖ͬͯΘ͔ͬͨ -BOHVBHF4FSWFSͷԸܙ

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͔͜͜Β൒෼ ͘Β͍7JNͷ࿩ 8BSOJOH

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-BOHVBHF4FSWFSಋೖ #FGPSF"GUFS

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#FGPSF"GUFS

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KFEJ HPDPEF BVUPQFQ qBLF JTPSU ZBSQ CMBDL HPEFG JNQM JNQM HVSV HPMJOU 7JN ϦϯλʔϑΥʔϚολ ϓϥάΠϯ "-& ࣗಈิ׬ EFPQMFUF (PݴޠπʔϧϓϥάΠϯ WJNHP 1ZUIPOݴޠπʔϧϓϥάΠϯ KFEJWJN 1ZUIPOิ׬ EFPQMFUFKFEJ (Pิ׬ EFPQMFUFHP

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#FGPSF"GUFS

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ࣗಈิ׬ (deoplete) LSPิ׬ (deoplete- vim-lsp) QZMT HPQMTCJOHP Language Server Client (vim-lsp) 7JN -41

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ࣗಈิ׬ (deoplete) LSPิ׬ (deoplete- vim-lsp) QZMT HPQMTCJOHP 7JN Language Server Client (vim-lsp) -41 -BOHVBHF4FSWFS$MJFOU

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ࣗಈิ׬ (deoplete) LSPิ׬ (deoplete- vim-lsp) 7JN Language Server Client (vim-lsp) QZMT HPQMTCJOHP -41 -BOHVBHF4FSWFS

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ͲΜͳਓʹͲΜͳԸܙ͕ ͋Δ͔ ໝ૝

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-41͸ίϛϡχςΟͷ։ൃϦιʔεΛΑΓޮ཰తʹ ӡ༻͢ΔͨΊͷϑϨʔϜϫʔΫ ͍ΖΜͳཱ৔ͷਓʹԸܙ͕͋Δ w ΤσΟλϓϥάΠϯ։ൃऀ w ݴޠπʔϧ։ൃऀ w ΤσΟλϢʔβ

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ΤσΟλϓϥάΠϯ։ൃऀ

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#FGPSF"GUFS

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KFEJ HPDPEF BVUPQFQ qBLF JTPSU ZBSQ CMBDL HPEFG JNQM JNQM HVSV HPMJOU ϦϯλʔϑΥʔϚολ ϓϥάΠϯ "-& ࣗಈิ׬ EFPQMFUF (PݴޠπʔϧϓϥάΠϯ WJNHP 1ZUIPOݴޠπʔϧϓϥάΠϯ KFEJWJN 1ZUIPOิ׬ EFPQMFUFKFEJ (Pิ׬ EFPQMFUFHP 7JN ຊདྷ΍Γ͍ͨ͜ͱ ड͚औͬͨ݁ՌΛͲ͏දࣔ͢Ε͹ΑΓ Ϣʔβ͕ศརʹͳΔ͔

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KFEJ HPDPEF BVUPQFQ qBLF JTPSU ZBSQ CMBDL HPEFG JNQM JNQM HVSV HPMJOU ϦϯλʔϑΥʔϚολ ϓϥάΠϯ "-& ࣗಈิ׬ EFPQMFUF (PݴޠπʔϧϓϥάΠϯ WJNHP 1ZUIPOݴޠπʔϧϓϥάΠϯ KFEJWJN 1ZUIPOิ׬ EFPQMFUFKFEJ (Pิ׬ EFPQMFUFHP ࢓ํ͕ͳ͘΍Δ͜ͱ ݴޠ։ൃπʔϧ͝ͱʹ࣮૷͕ඞཁ w ݺͼग़͠ํ๏ Φϓγϣϯͷҧ͍ w ݁Ռͷύʔε ग़ྗϑΥʔϚοτҧ͍ πʔϧ͕ҧ͑͹࢖͍ํ΋ҧ͏

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#FGPSF"GUFS

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ࣗಈิ׬ (deoplete) LSPิ׬ (deoplete- vim-lsp) QZMT HPQMTCJOHP 7JN Language Server Client (vim-lsp) -41 ͪ͜ΒʹूதͰ͖Δ มΘͬͨ͜ͱ -41Ͱ࢓༷͕౷Ұ͞Ε͍ͯΔ͔Β -BOHVBHF4FSWFSΛม͑ͯ΋ݸผରԠඞཁφγ

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Ϧιʔεͷूத (PݴޠπʔϧϓϥάΠϯ WJNHP 1ZUIPOݴޠπʔϧϓϥάΠϯ KFEJWJN Language Server Client (vim-lsp) 7JNTDSJQU(P 7JNTDSJQU1ZUIPO

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(PݴޠπʔϧϓϥάΠϯ WJNHP 1ZUIPOݴޠπʔϧϓϥάΠϯ KFEJWJN Language Server Client (vim-lsp) 7JNTDSJQU0OMZ Ϧιʔεͷूத

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ݴޠπʔϧ։ൃऀ

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#FGPSF"GUFS

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7JN ϦϯλʔϑΥʔϚολ ϓϥάΠϯ "-& ࣗಈิ׬ EFPQMFUF (PݴޠπʔϧϓϥάΠϯ WJNHP 1ZUIPOݴޠπʔϧϓϥάΠϯ KFEJWJN 1ZUIPOิ׬ EFPQMFUFKFEJ (Pิ׬ EFPQMFUFHP KFEJ HPDPEF BVUPQFQ qBLF JTPSU ZBSQ CMBDL HPEFG JNQM JNQM HVSV HPMJOU ຊདྷ΍Γ͍ͨ͜ͱ ਖ਼֬Ͱߴ଎ͳϨεϙϯεͨΊʹ ΧϦΧϦͷνϡʔχϯά

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7JN ϦϯλʔϑΥʔϚολ ϓϥάΠϯ "-& ࣗಈิ׬ EFPQMFUF (PݴޠπʔϧϓϥάΠϯ WJNHP 1ZUIPOݴޠπʔϧϓϥάΠϯ KFEJWJN 1ZUIPOิ׬ EFPQMFUFKFEJ (Pิ׬ EFPQMFUFHP KFEJ HPDPEF BVUPQFQ qBLF JTPSU ZBSQ CMBDL HPEFG JNQM JNQM HVSV HPMJOU ࢓ํ͕ͳ͘΍Δ͜ͱ ΤσΟλຖͷݸผରԠ w ΤσΟλ͕ड͚औΓՄೳͳग़ྗ w ड͚औΓқ͍ܗࣜ΁ͷύʔε

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#FGPSF"GUFS

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ࣗಈิ׬ (deoplete) LSPิ׬ (deoplete- vim-lsp) 7JN Language Server Client (vim-lsp) QZMT HPQMTCJOHP -41 ΤσΟλຖͷࠩ෼Λؾʹ͢Δඞཁ͸ͳ͍ ͦͯ͠-41ʹ͸ੑೳʹد༩͢Δ ϢʔςΟϦςΟతͳ.FUIPE΋ଘࡏ͠ɺ ੑೳ޲্ʹΑΓྗΛׂ͚Δ มΘͬͨ͜ͱ

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ΤσΟλϢʔβ

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#FGPSF"GUFS

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7JN ຊདྷ΍Γ͍ͨ͜ͱ ίʔυΛॻ͘͜ͱ WJNSD͸ؚ·ͳ͍ $PEF

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KFEJ HPDPEF BVUPQFQ qBLF JTPSU ZBSQ CMBDL HPEFG JNQM JNQM HVSV HPMJOU ϦϯλʔϑΥʔϚολ ϓϥάΠϯ "-& ࣗಈิ׬ EFPQMFUF (PݴޠπʔϧϓϥάΠϯ WJNHP 1ZUIPOݴޠπʔϧϓϥάΠϯ KFEJWJN 1ZUIPOิ׬ EFPQMFUFKFEJ (Pิ׬ EFPQMFUFHP ࢓ํ͕ͳ͘΍Δ͜ͱ ָ͍͠ ݴޠϓϥάΠϯຖͷઃఆ w දࣔಈ࡞Φϓγϣϯ w ίϚϯυͷΩʔόΠϯυ

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7JN ϦϯλʔϑΥʔϚολ ϓϥάΠϯ "-& ࣗಈิ׬ EFPQMFUF (PݴޠπʔϧϓϥάΠϯ WJNHP 1ZUIPOݴޠπʔϧϓϥάΠϯ KFEJWJN 1ZUIPOิ׬ EFPQMFUFKFEJ (Pิ׬ EFPQMFUFHP KFEJ HPDPEF BVUPQFQ qBLF JTPSU ZBSQ CMBDL HPEFG JNQM JNQM HVSV HPMJOU ࢓ํ͕ͳ͘΍Δ͜ͱ ָ͍͠ ݸผͷίϚϯυͷΠϯετʔϧ w Ϧϯλʔ w ϑΥʔϚολʔ w ࣗಈิ׬ w ͦͷଞ੩తղੳ

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#FGPSF"GUFS

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ࣗಈิ׬ (deoplete) LSPิ׬ (deoplete- vim-lsp) QZMT HPQMTCJOHP 7JN Language Server Client (vim-lsp) -41 มΘͬͨ͜ͱ ͲͷݴޠͰ΋-BOHVBHF4FSWFS$MJFOUͰର ԠͰ͖Δ w ΠϯετʔϧηοτΞοϓͷলྗԽ w ݴޠຖͷݸผઃఆͷ౷Ұ

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ࣗಈิ׬ (deoplete) LSPิ׬ (deoplete- vim-lsp) 7JN Language Server Client (vim-lsp) QZMT HPQMTCJOHP -41 มΘͬͨ͜ͱ ݴޠ։ൃπʔϧͷ౷߹ w ΠϯετʔϧηοτΞοϓͷলྗԽ ݴޠίϛϡχςΟ։ൃϦιʔεूதʹΑΔ ੑೳ޲্ w ߴ඼࣭ͳݴޠ։ൃػೳͷڗड

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7JN ॻ͚Δʜίʔυ͕ॻ͚Δͧ $PEF มΘͬͨ͜ͱ

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એ఻

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ࣗಈิ׬ (deoplete) LSPิ׬ (deoplete- vim-lsp) QZMT HPQMTCJOHP Language Server Client (vim-lsp) 7JN -41

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ࣗಈิ׬ (deoplete) QZMT HPQMTCJOHP Language Server Client (vim-lsp) 7JN -41 LSPิ׬ (deoplete- vim-lsp)