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dragon-importsで爆速goimports生活 - プロジェクト Go modules -/dragon-imports
monochromegane
February 12, 2019
Programming
1
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dragon-importsで爆速goimports生活 - プロジェクト Go modules -/dragon-imports
Fukuoka.go#13+Okayama.go #fukuokago
https://fukuokago.connpass.com/event/112073/
monochromegane
February 12, 2019
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Transcript
- ϓϩδΣΫτ Go modules - ࡾ༔հ / Pepabo R&D Institute,
GMO Pepabo, Inc. 2019.02.12 Fukuoka.go#13+Okayama.go dragon-importsͰ രgoimportsੜ׆
ϓϦϯγύϧΤϯδχΞ ࡾ༔հ!NPOPDISPNFHBOF (.0ϖύϘגࣜձࣾϖύϘݚڀॴ IUUQTCMPHNPOPDISPNFHBOFDPN
1. Motivation 2. Problem of goimports 3. Approach by dragon-imports
4. Evalution 5. Discussion about Go modules 3 ࣍
1. Motivation
͓·͑ ࠓ·ͰΠϯϙʔτͨ͠ ίʔυͷΛ ͓΅͍͑ͯΔͷ͔ʁ
• goimportsimportߦͷߋ৽ΛࣗಈͰߦͬͯ͘ΕΔͨΊඇৗʹศར • goimports։ൃதɼԿ࣮ߦ͞ΕΔ • ୳ࡧରͷύοέʔδ͕૿͑Δͱ࣮ߦ͕͘ͳΓੜ࢈ੑ͕Լ͕Δ • ಛʹghq+pecoͰϩʔΧϧϦϙδτϦΛ౷Ұཧ͍ͯ͠Δ߹ʹݦஶ • ͦ͜Ͱ୳ࡧରͷύοέʔδ͕૿࣮͑ͯߦ͕มΘΒͳ͍άϨʔτͳ
goimports͕ٻΊΒΕΔ 6 goimportsͷԽΛղܾ͍ͨ͠
2. Problem of goimports
• ରͷίʔυΛASTʹม͠importߦΛߋ৽ɼՃɼআɽͦͷޙɼϑΥʔ ϚοτࡁΈίʔυΛग़ྗ͢Δ • ୳ࡧରͷύοέʔδʹඪ४ϥΠϒϥϦͱ֎෦ύοέʔδ͕͋Δ • $GOPATH/src, $GOPATH/pkg/mod • ରͷೖྗதͷύοέʔδ໊ɼγϯϘϧ໊ͷΈ߹ΘͤΛશͯຬͨ͢Πϯϙʔ
τύεΛղܾ͢Δ • math/rand (import path), rand (package name), Int (symbol) 8 goimportsͷجຊ
9 goimportsͷ࣮ߦྫ $ cat imp.txt package imp func hoge() {
fmt.Println("hello.") kaburaya.Recorder } $ goimports imp.txt package imp import ( "fmt" "github.com/monochromegane/kaburaya" ) func hoge() { fmt.Println("hello.") kaburaya.Recorder }
• ΑΓਖ਼͘͠୳ࡧରͱͳΔʮ֎෦ʯύοέʔδ͕૿Ճͨ͠߹ʹ͘ͳΔ • ΫϥΠΞϯτڥ࣌ؒܦաʹΑͬͯ֎෦ύοέʔδҰཡมԽ͢Δ͜ͱ͔Βɼ୳ࡧ ରͷσΟϨΫτϦ୳ࡧɼߏจղੳɼϦϑΝϨϯεͷநग़Λߦ͏ඞཁ͕͋ΔͨΊɽ • ରʹɼύοέʔδҰཡ͕ڥʹΑͬͯมԽ͠ͳ͍ඪ४ύοέʔδΠϯϙʔ τύεɼύοέʔδ໊ɼγϯϘϧͷϦετΛࣄલʹղੳ͞Ε͍ͯΔ 10 ͳͥgoimports͕͘ͳΔͷ͔
goimportsඪ४ύοέʔδ 11 package imports var stdlib = map[string]map[string]bool{ "archive/tar": map[string]bool{
"ErrFieldTooLong": true, "ErrHeader": true, "ErrWriteAfterClose": true, "ErrWriteTooLong": true, $GOROOT/api/go1.*txt golang.org/x/tools/imports/mkstdlib.go golang.org/x/tools/imports/zstdlib.go golang.org/x/tools/cmd/goimports.go#main golang.org/x/tools/imports/imports.go#Process golang.org/x/tools/imports/fix.go#addStdlibCandidates pkg crypto/rsa, method (*PrivateKey) Size() int pkg crypto/rsa, method (*PublicKey) Size() int
• First pass (Πϯϙʔτ͕ඞཁ͔ௐΔ) • ରͷϦϑΝϨϯεҰཡͱimportߦ͕߹க͢Δ͔֬ೝ • Second pass (ඪ४ύοέʔδ·ͨطimportߦ͔Βղܾ)
• var stdlib·ͨଞϑΝΠϧͰimportࡁΈͷߦΛީิͱͯ͠߹க͢Δ͔֬ೝ • Third pass (֎෦ύοέʔδ͔Βղܾ) • $GOPATH/src͘͠$GOPATH/pkg/mod͔ΒϦϑΝϨϯεʹࣅͨσΟϨΫτϦΛߜΓࠐ ΈɼީิϑΝΠϧΛղੳͯ֬͠ೝ 12 goimportsͷߴԽͷ
13 ஈ֊͝ͱͷ࣮ߦ TUQBTT ЖT OEQBTT ЖT SEQBTT ЖT Πϯϙʔτෆཁ
ඪ४ϥΠϒϥϦͷΤΫεϙʔτΛࢀর ଞϑΝΠϧͷΠϯϙʔτΛࢀর ֎෦ύοέʔδͷΤΫεϙʔτΛࢀর $ tree !"" imp.txt !"" other.go #"" other2.go $ find . -type d | wc -l 120840 Original goimports
3. Approach by dragon-imports
• ΫϥΠΞϯτڥ͝ͱʹ୳ࡧରͷύοέʔδҰཡਓؒ࣌ؒͰ͔͠มԽ͠ ͳ͍ • ࣄલղੳͷ݁Ռ͕ݱঢ়ʹԊΘͳ͚Εશ୳ࡧΛߦ͏ϑΥʔϧόοΫ͕Մೳ • ͞ΒʹΠϯϙʔτߦʹޡΓ͕͋ͬͯϏϧυͰࣦഊ͢Δ • ͜ΕΒͷલఏ͔Β֤ΫϥΠΞϯτڥ͝ͱʹ୳ࡧରͷύοέʔδΛҙͷλ ΠϛϯάͰࣄલղੳ͓ͯ͘͜͠ͱͰgoimportsͷߴԽ͕Մೳ
15 ఏҊख๏ͷண؟
• monochromegane/dragon-imports • A tool for speedup go imports command
• https://github.com/monochromegane/dragon-imports • ඪ४ύοέʔδͱ$GOPATH/srcΛղੳ͠ɼzstdlib.goΛ࠶ੜɼgoimportsͷ ࠶Πϯετʔϧ·Ͱߦ͏ • zstdlib.go(=var stdlib)ͷͷߴ͞ʹΑΓैੑ൚༻ੑ͕ߴ·Δ 16 ఏҊख๏ͷ࣮ $ go get github.com/monochromegane/dragon-imports/... $ dragon-imports
dragon-imports 17 package imports var stdlib = map[string]map[string]bool{ "archive/tar": map[string]bool{
"ErrFieldTooLong": true, "ErrHeader": true, "ErrWriteAfterClose": true, "ErrWriteTooLong": true, $GOROOT/api/go1.*txt dragon-imports golang.org/x/tools/imports/zstdlib.go golang.org/x/tools/cmd/goimports.go#main golang.org/x/tools/imports/imports.go#Process golang.org/x/tools/imports/fix.go#addStdlibCandidates $GOPATH/**/*.go
4. Evalution
19 ࣮ߦ࣌ؒͷൺֱ TUQBTT ЖT OEQBTT ЖT SEQBTT ЖT Πϯϙʔτෆཁ
ඪ४ϥΠϒϥϦͷΤΫεϙʔτΛࢀর ଞϑΝΠϧͷΠϯϙʔτΛࢀর ֎෦ύοέʔδͷΤΫεϙʔτΛࢀর Original goimports TUQBTT ЖT OEQBTT ЖT SEQBTT ЖT Πϯϙʔτෆཁ ඪ४ϥΠϒϥϦͷΤΫεϙʔτΛࢀর ଞϑΝΠϧͷΠϯϙʔτΛࢀর ֎෦ύοέʔδͷΤΫεϙʔτΛࢀর Dragonize goimports
5. Discussion about Go modules
• Go modulesΛ༗ޮʹ͢Δͱ$GOPATH/srcͰͳ͘$GOPATH/pkg/modԼ ͷόʔδϣχϯάཧ͞Εͨύοέʔδ͕ར༻͞ΕΔ • goimportsͰ୳ࡧରΛಉ͡Α͏ʹΓସ͍͑ͯΔ • ֎෦ύοέʔδʹόʔδϣχϯάͷ֓೦͕ಋೖ͞ΕΔͨΊɼಉҰΠϯϙʔτύ εͰ͋ͬͯγϯϘϧϦετ͕ҟͳΔՄೳੑ͕͋Δʢͨͩ͠ϝδϟʔόʔδϣ ϯ͕ҟͳΔͱ/v2ͷΑ͏ʹผͱͯ͠ѻ͑Δʣ
• ඪ४ύοέʔδόʔδϣχϯάͷ֓೦͕·ͩͳ͍ͨΊzstdlib.goෳόʔ δϣϯͷγϯϘϧΛѻ͏ߏʹͳ͍ͬͯͳ͍ 21 Go modulesΛͲ͏ѻ͏͔
• Go modulesཧͷ֎෦ύοέʔδΛࣄલղੳ͢Δ • ΦϓγϣϯʹΑͬͯղੳରΛGOPATH/pkg/modʹมߋ͢ΔɽGO111MODULES=autoͷ ڍಈաظͰ͋Δ͜ͱɼzstdlib.goWorkingDirΛΕͳ͍͜ͱ͔ΒରԠ͠ͳ͍ • ֎෦ύοέʔδ֤ϝδϟʔόʔδϣϯͷ࠷৽ͷΈΛࣄલղੳ͢Δ • ϚΠφʔόʔδϣϯҎԼͷෳόʔδϣϯ͕ଘࡏ͢Δ߹ɼbreaking
changeͳ͍લఏͰ ඪ४ύοέʔδͱಉ༷ʹ࠷৽ͷΈରԠɽsemverະରԠͳ֎෦ύοέʔδʹ͓͍ͯຊํ ʹΑͬͯޡఆࢭɼ࠷৽Խͷಈػ͚ͱ͢Δ • vendoringࣄલղੳ͠ͳ͍ • ͦͦڞ௨Խ͞Εͨύοέʔδ܈͕૿େ͢Δ͜ͱͰҾ͖ى͜͞ΕΔԆͰ͋ΓɼϓϩδΣ Ϋτ͝ͱͷ࠷খͷύοέʔδ୳ࡧʹΑΔԆߟ͑ʹ͍ͨ͘Ί 22 Go modulesΛͲ͏ѻ͏͔
23 dragon-imports $ go get -u github.com/monochromegane/dragon-imports/... $ dragon-imports --gomodules
• gomodulesΦϓγϣϯΛ࣮ݧతʹఏڙ • Go1.12ͷਖ਼ࣜαϙʔτͷঢ়گΛݟͯΦϓγϣϯॳظΛtrueͱ͢Δ༧ఆ • ܅ࠓ͙͢go get -u !!!
• Go modulesͰv2Ҏ߱ͷϝδϟʔόʔδϣϯ͝ͱʹΠϯϙʔτύε͕ҟͳΔ • ͔͠͠ύοέʔδύεϝδϟʔόʔδϣϯΛؚ·ͳ͍ 24 v2ͱ͍͏٬ $ tree !""
hellomod $ #"" v2@v2.0.0 #"" hellomod@v1.0.1 package main import "github.com/donvito/hellomod/v2" func main() { hellomod.SayHello("Melvin") } • ඪ४ϥΠϒϥϦόʔδϣϯΛߟྀ͠ͳ͍ͨΊ “v2”ͱ“hellomod”Λൺֱ͞Ε ͯ͠·͍ɼ֎෦ύοέʔδ୳ࡧ͕࢝·ͬͯ͠·͏……………………………!!!
R.I.P.
• dragon-importsͷΈΛհͨ͠ • UsefulͳΕͲGo modules࣌ʹશରԠݫͦ͠͏ • ७ਮʹύοέʔδ͚ͩͷσΟϨΫτϦͱͳΔͷͰԆൃੜ͠ͳ͍ͱࢥΘΕ Δɽ͠Β͘ӡ༻ͯ͠ࠔͬͨΒdragon-import.v2Λߟ͑Δɽ • Go
modules࣌ͷศརπʔϧ࡞͍ͬͯ͜͏ • ͱΓ͋͑ͣGo modulesʹدͤΔʹͨͬͯҰཡΛऔಘ͢ΔͨΊͷ ’mole(ཽ)’Λ࡞ͬͯΔ https://github.com/monochromegane/mole 26 ·ͱΊ
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