Go開発で実際にやった事一通り

(P։ൃͰ࣮ࡍʹ΍ͬͨࣄҰ௨Γ

ϞόΠϧΞϓϦαʔϏε෦ େࡕࣄ຿ॴ!̍ਓ 3BJMTɺ/PEFɺ(P࢖ͬͯ"1*࡞ͬͯ·͢ (Pྺ൒೥ 3VCZͷਓ ͨͿΜ

(PͰ࡞Δಈػ w 3VCZ͕޷͖͚ͩͲ࣮ߦ଎౓͕଎͍ݴޠ΋शಘ͓͖͔ͯͨͬ͠ ͨ w ྫ֎ɺܧঝͳͲͷѻ͍Ͳ͜Ζ͕೉͍͠ػೳΛ͍͋͑ͯΕͳ͍  γϯϓϧͳࢥ૝ w ެࣜͷϑΥʔϚολʔ͕͋Δ w
ฒߦॲཧΛαϙʔτ͍ͯ͠Δ w ͭͷόΠφϦʹͳΔ

(PΛ͔ͭͬͯΔՕॴ w '51Λ࢖ͬͨ֎෦࿈ܞ w ϞόΠϧΞϓϦͷϑϩϯτ"1* ϓϩμΫτͷҰ෦ʹ͔ͭΘΕ͍ͯ·͢

ࠓ೔࿩͢͜ͱ w Πϯετʔϧ w ։ൃ w ςετ w σϓϩΠ

Πϯετʔϧ

ʮHPͷόʔδϣϯ؅ཧπʔϧ ͳʹ͔ͭͬͯΔͷʁʯ

ʮ͔ͭͬͯ·ͤΜʯ

(PΛΠϯετʔϧ͢Δํ๏ w )PNFCSFX w HPFOW w όΠφϦΛμ΢ϯϩʔυ

~go ├── bin ├── gobin │ ├── go1.8.3 │ │
└── go │ └── go1.8.3.darwin-amd64.tar.gz ├── pkg │ └── darwin_amd64 │ ├── github.com │ └── golang.org └── src ├── github.com │ ├── cm-nishida-masayuki │ ├── codegangsta │ ├── daviddengcn │ ├── hiroshi-manabe │ ├── jteeuwen │ ├── mitchellh │ └── motemen └── golang.org σΟϨΫτϦߏ੒

~go ├── bin ├── gobin │ ├── go1.8.3 │ │
└── go │ └── go1.8.3.darwin-amd64.tar.gz ├── pkg │ └── darwin_amd64 │ ├── github.com │ └── golang.org └── src ├── github.com │ ├── cm-nishida-masayuki │ ├── codegangsta │ ├── daviddengcn │ ├── hiroshi-manabe │ ├── jteeuwen │ ├── mitchellh │ └── motemen └── golang.org (01"5)Λ ௨ͯ͠Δͱ͜Ζ

~go ├── bin ├── gobin │ ├── go1.8.3 │ │
└── go │ └── go1.8.3.darwin-amd64.tar.gz ├── pkg │ └── darwin_amd64 │ ├── github.com │ └── golang.org └── src ├── github.com │ ├── cm-nishida-masayuki │ ├── codegangsta │ ├── daviddengcn │ ├── hiroshi-manabe │ ├── jteeuwen │ ├── mitchellh │ └── motemen └── golang.org ௥Ճͨ͠σΟϨΫτϦ μ΢ϩʔυ͖ͯͨ͠όΠφϦΛ͓͘

export GOPATH=~/go export GOROOT=$GOPATH/gobin/go1.8.3/go/ export PATH=$PATH:$GOROOT/bin:$GOPATH/bin

export GOPATH=~/go export GOROOT=$GOPATH/gobin/go1.8.3/go/ export PATH=$PATH:$GOROOT/bin:$GOPATH/bin ੾Γସ͍͑ͨͱ͖͸ (03005Λมߋ͢Δ

ʮϓϩμΫτͷιʔεͬͯ Ͳ͜ʹ͓͘Μʁʯ

ʮ(01"5)ͷԼʹ ͓͍ͯ·͢ʯ

~go ├── bin ├── gobin │ ├── go1.8.3 │ │
└── go │ └── go1.8.3.darwin-amd64.tar.gz ├── pkg │ └── darwin_amd64 │ ├── github.com │ └── golang.org └── src ├── github.com │ ├── cm-nishida-masayuki │ ├── codegangsta │ ├── daviddengcn │ ├── hiroshi-manabe │ ├── jteeuwen │ ├── mitchellh │ └── motemen └── golang.org ࣗ෼ͷϓϩδΣΫτ΋ (01"5)TSDͷԼʹஔ͘

w ૬ର1"5)ࢦఆ w (01"5)TSD͔Βͷઈରύεࢦఆ import "../subpkg" (PͰ͸αϒύοέʔδ΋ ਖ਼͘͠औಘͰ͖ΔΑ͏ઈରύεͰࢦఆ͢ΔͷͰ  ϓϩδΣΫτ΋(01"5)ҎԼʹஔ͘ͷ͕ແ೉
(PͰαϒύοέʔδΛ Πϯϙʔτ͢Δํ๏ import "github.com/cm-nihsida-masayuki/myprj/subpkg"

ʮCVOEMFS΍OQN΍NBWFO Έ͍ͨͳύοέʔδϚωʔδϟʔ Ͳ͏ͯ͠Δͷʁʯ

ʮެࣜͰ͸·ͩ͋Γ·ͤΜɻ αʔυύʔςΟͷ HMJEFΛ࢖ͬͯ·͢ʯ

HMJEF w HMJEFZBNM w CVOEMFSͰ͍͏(FNpMF w ඞཁͳύοέʔδ͕ॻ͔Ε͍ͯΔ w HMJEFMPDL w
CVOEMFSͰ͍͏(FNpMFMPDL w ඞཁͳύοέʔδͷ͞Βʹґଘ͍ͯ͠Δύοέʔδ΍ɺ  Πϯετʔϧͨ͠ίϛοτϋογϡͳͲ͕ॻ͔Ε͍ͯΔ

ʮܧঝͳͯ͘େৎ෉ʁʯ

ʮ͍͚ͯ·͢ ࠓͷͱ͜Ζ ʯ

طଘͷϥΠϒϥϦͷΫϥεͷ ϝιουΛͪΐͬͱม͑ͨ ৽͍͠ΫϥεΛ࡞Γ͍ͨ ๻͕ܧঝ࢖͍͍ͨγʔϯ

਌Ϋϥεͷ͢΂ͯͷϝιουΛҾ͖ܧ͗ Ұ෦ͷϝιουΛॻ͖׵͍͑ͨ 8SJUF 3FBE $MPTF TFTTJPO TTI$POO .Z4'51$MJFOU 8SJUF 3FBE
$MPTF TFTTJPO 4'51$MJFOU $MPTF Ͱ  TFTTJPOͱTTI$POO ྆ํͱ͍ͨ͡

type Client struct { *sftp.Client SshConn ssh.Conn } func (c
*Client) Close() { c.Client.Close() c.SshConn.Close() } ߏ଄ମͷຒΊࠐΈͰͰ͖·͢

ςϯϓϨʔτϝιουΈ͍ͨʹ  ॲཧͷલޙʹڞ௨ॲཧΛೖΕ͍ͨ ๻͕ܧঝ࢖͍͍ͨγʔϯ

ྫ͑͹+BWBͰ͔͘ͳΒ͜͏͍͏ॲཧ public class Main { public static void main(String[]
args) { Super instance = new Concrete(); instance.execute(); } } public abstract class Super { public void execute() { pre(); doProcess(); after(); } protected abstract void doProcess(); private void pre() { System.out.println("pre"); } private void after() { System.out.println("after"); } } public class Concrete extends Super { @Override protected void doProcess() { System.out.println("process"); } }

package main import "fmt" func Around(f func()) { fmt.Println("pre") f()
fmt.Println("after") } func main() { Around(func() { fmt.Println("process") }) } ؔ਺͕ϑΝʔετΦϒδΣΫτͳͷͰҾ਺Ͱड͚औΔ͜ͱͰ ࣮ݱͰ͖·͢ *OUFSGBDFΛ࢖ͬͯ΋Ͱ͖·͢

ʮύοέʔδΘ͚Ͳ͏ͯ͠Δʯ

ʮେ͖Ίʹͬ͘͟Γͱ Θ͚ͯ·͢ʯ

├── awsutils ├── config ├── data ├── handler ├── logger
├── main.go ├── model ├── redisutils ├── utils ├── vendor └── version

QBDLBHFB QBDLBHFC (PͰ͸॥؀ࢀর͕ίϯύΠϧΤϥʔʹͳΔͷͰɺ ඞͣยํ޲ʹͳΔ୯ҐͰύοέʔδΛΘ͚ͯ·͢

ʮྫ֎ͳͯ͘େৎ෉ʁʯ

ʮ΄͍ͬ͢͠ʯ

func main() { err := func1() if err != nil
{ panic(err) } } func func1() error { if err := func2(); err != nil { return err } return errors.New("crush in func1") } func func2() error { return errors.New("crush in func2") } ωοτϫʔΫӽ͠ʹ˓˓ %#ɺ֎෦"1*౳ Έ͍ͨͳॲཧ͕ ଟ͍ͱͲ͏ͯ͠΋Τϥʔ͕ଟ͘ͳΔͷͰ൥ࡶͳॲཧʹͳΓ·͢ Ͳ͏ͯ͠΋ࣅͨॲཧΛ ෳ਺ॻ͘ඞཁ͕͋Δ

ʮQBOJDɺSFDPWFS͸ʁʯ

ʮ૝ఆ͞ΕΔΤϥʔͰ ར༻͢Δͷ͸ඇਪ঑Ͱ͢ʯ

HPͷQBOJD w SFDPWFS͠ͳ͍ͱଞͷHPSPVUJOFΛר͖ࠐΈϓϩά ϥϜΛΫϥογϡͤ͞Δ w ෮چޙͦͷؔ਺Λݺͼग़ͨ͠ޙͷޙଓॲཧ͕૸Βͳ͍ w 0VUCPVOE*OEFYͱ͔4FHNFOUBUJPO'BVMUͷΑ ͏ͳຊ౰ͷྫ֎ͷͱ͖ʹ࢖͏૝ఆͳͷͰɺଞύοέʔδ ͷQBOJDΛSFDPWFSͯ͠͠·͏ͱϝϞϦ͕ਖ਼͍͠ঢ়ଶ
ͳͷ͔อূͰ͖ͳ͍

ͦͷҝωοτϫʔΫΤϥʔ΍ɺͦͷଞͷ࿦ཧతͳΤϥʔͰ ଞͷݴޠͷྫ֎ͷΑ͏ʹQBOJDSFDPWFSΛ࢖͏ͷ͸ޡΓͰ ໭Γ஋ͷFSSPSΛར༻ͯ͠ݺͼग़͠ݩʹ఻͑Δ

ʮMPH'BUBMͰϩά͸͍ͨΒ ͓ͪͨΜͰ͚͢Ͳɻɻʯ

ʮམͪ·͢ʯ

// Fatal is equivalent to Print() followed by a call
to os.Exit(1). func Fatal(v ...interface{}) { std.Output(2, fmt.Sprint(v...)) os.Exit(1) } ඪ४ͷMPHύοέʔδͷ'BUBMؔ਺͸ தͰPT&YJU ΛಡΜͰΔͷͰऴྃ͠·͢

ʮ(PͩͱґଘϥΠϒϥϦͷ ιʔε΋ϦϙδτϦʹؚΊΔͱ ͖͍͚ͨͲʁʯ

ʮΒ͍͠ΜͰ͕͢ɺ ͖͋ΒΊ·ͨ͠ʯ

7FOEPSJOH w HPͰ͸WFOEPSσΟϨΫτϦҎԼʹύε͕ͱ͓Δ Ҏ ্ w WFOEPSҎԼʹ͢΂ͯͷϥΠϒϥϦͷιʔεΛஔ͍؅ཧ͠ ͦͷ··ϦϙδτϦʹϓογϡͯ͠͠·͏ w
ΞοϓετϦʔϜͷӨڹΛड͚ͳ͍ͷͰ҆ఆͯ͠ίϯύΠϧ Ͱ͖Δ w ϥΠϒϥϦͷιʔεΛॻ͖׵͑ΕΔ

7FOEPSJOHఘΊͨཧ༝ w ΞοϓετϦʔϜͷมߋΛऔΓࠐΊͳ͍ औ ΓࠐΈʹ͍͘ w HMJEF౳Ͱ͋Δఔ౓όʔδϣϯ؅ཧͰ͖Δ w (JUIVCͷEJGGϖʔδ͕രൃͨ͠

ςετ

ʮϑϨʔϜϫʔΫ͸ʁʯ

ʮͱ͘ʹϑϨʔϜϫʔΫ͸ͭ ͔ͬͯͳ͍Ͱ͢ʯ

func TestFunc(t *testing.T) { if Func1() == "" { t.Error("abc")
} } ඪ४ͷUFTUJOHϞδϡʔϧͷ୯७ͳػೳͱ BTTFSUJPOͱͯ͠UFTUJGZΛ͔ͭͬͯ͘Β͍Ͱ͕͢ ࠓͷͱ͜ΖͳΜͱ͔ͳͬͯ·͢ &SSPSʹԿ͔Λ ॻ͖ࠐΊ͹ςετ͕ࣦഊ͢Δ

ʮNPDLͲ͏ͯ͠Δͷʁʯ

ʮNPDL͍ͨؔ͠਺Λ௚લʹ ஔ͖׵͑ͯ΍ͬͯ·͢ʯ

package mock var f1 = func() string { return
"not mocking" } func Func1() string { return f1() } package mock import ( "fmt" "testing" ) func TestFunc1(t *testing.T) { fmt.Println(Func1()) } func TestFunc1WithMock(t *testing.T) { f1 = func() string { return "mocking" } fmt.Println(Func1()) } NPDL͍ͨؔ͠਺Λ ม਺ʹ͓ͯ͘͠ NPDL͍ͨؔ͠਺Λ ม਺ʹ͓ͯ͘͠ not mocking mocking

σϓϩΠ

ʮઃఆϑΝΠϧ͸Ͳ͏͢ΔΜʁ ͍ͬ͜όΠφϦஔ͚ͩ͘  ͡Όͳ͘ͳΒͳ͍ʁʯ

ʮόΠφϦͷதʹؚΊͯ·͢ʯ

HPCJOEBUB var _configYaml = []byte("\x1f\x8b\x08\x00\x00\x00\x00\x00\x00\xff go-bindata data/ cBytes, err
:= Asset("config.yaml") HPCJOEBUBίϚϯυΛ࣮ߦ͢Δͱ ϑΝΠϧͷόΠτ഑ྻ͕ຒΊࠐ·ΕͨCJOEBUBHP͕Ͱ͖ "TTFSUؔ਺ʹϑΝΠϧ໊Λ౉͢ͱऔΓग़ͤΔ

ʮͲ͏΍ͬͯ σϓϩΠͯ͠Δͷʁʯ

ʮ&$4Λ࢖͍ͬͯ·͢ʯ

σϓϩΠϑϩʔ &$3 &$4 %PDLFS git push origin v0.0.0 λάΛ1VTI
docker build go test .  GOOS=linux GOARCH=amd64 go build docker push ίϯςφ্ͰHPΛϏϧυͯ͠ςετ 0,ͳΒ&$3ʹ1VTI $MPVE'PSNBUJPO UBTLEFpOJUJPOT࡞੒ ίϯςφͷೖΕସ͑

FROM alpine RUN apk add --no-cache ca-certificates RUN mkdir
/lib64 && ln -s /lib/libc.musl-x86_64.so.1 /lib64/ld-linux-x86-64.so.2 COPY ./app /app ENTRYPOINT ["/app"] ϦϦʔε༻ͷ%PDLFSpMF ࣮ߦϑΝΠϧΛΠϝʔδʹؚΊ ΤϯτϦϙΠϯτʹࢦఆ͢Δ͚ͩ ΠϝʔδͷαΠζ͸.΄Ͳ  ಉϓϩδΣΫτͷ3BJMTͩͱ.

͝ਗ਼ௌ͋Γ͕ͱ͏͍͟͝·ͨ͠ʂ (Pಋೖͷॿ͚ʹͳΕ͹޾͍Ͱ͢

͏͍͋ʔ͸͍͋ΓΜ͙ େࡕࣄ຿ॴͰҰॹʹಇ͍ͯ͘ΕΔਓʂ

Go開発で実際にやった事一通り

Go開発で実際にやった事一通り

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