Write Once, Compile Lots, Run Anywhere

Transcript

About ★ Simple To Package And Ship ★ No Extra Dependencies ★ Broadly Compatible

@jrbowes ★ Support For Platforms You Care About $> go

tool dist list | column aix/ppc64 dragonfly/amd64 linux/arm64 nacl/amd64p32 openbsd/arm64 android/386 freebsd/386 linux/mips nacl/arm plan9/386 android/amd64 freebsd/amd64 linux/mips64 netbsd/386 plan9/amd64 android/arm freebsd/arm linux/mips64le netbsd/amd64 plan9/arm android/arm64 illumos/amd64 linux/mipsle netbsd/arm solaris/amd64 darwin/386 js/wasm linux/ppc64 netbsd/arm64 windows/386 darwin/amd64 linux/386 linux/ppc64le openbsd/386 windows/amd64 darwin/arm linux/amd64 linux/s390x openbsd/amd64 windows/arm darwin/arm64 linux/arm nacl/386 openbsd/arm

@jrbowes ★ Support For Platforms You Care About $> go

@jrbowes Good Multi-Platform Distribution ★ Support For Platforms You Care

@jrbowes ★ Simple To Package And Ship

@jrbowes ★ Simple To Package And Ship $> go build

-o mybin .

@jrbowes ★ Simple To Package And Ship $> go build

-o mybin . $> file mybin mybin: Mach-O 64-bit executable x86_64

@jrbowes ★ Simple To Package And Ship $> go build

-o mybin . $> file mybin mybin: Mach-O 64-bit executable x86_64 $> go env | grep -e ARCH= -e OS=

@jrbowes ★ Simple To Package And Ship $> go build

-o mybin . $> file mybin mybin: Mach-O 64-bit executable x86_64 $> go env | grep -e ARCH= -e OS= GOARCH="amd64" GOHOSTARCH="amd64" GOHOSTOS="darwin" GOOS="darwin"

@jrbowes ★ Simple To Package And Ship

@jrbowes ★ Simple To Package And Ship $> GOOS=linux GOARCH=386

go build -o mybin .

@jrbowes ★ Simple To Package And Ship $> GOOS=linux GOARCH=386

go build -o mybin . $> file mybin mybin: ELF 32-bit LSB executable, Intel 80386, version 1 (SYSV), statically linked, Go BuildID=BsI7W6-gfNe589qm79AK/ HNGwNEScRjtQ48lwr1I_/gaYHO-EnYpDZEfeZfj5y/ mucU2QyPI7SKOAIiU0Ip, not stripped

@jrbowes Use GoReleaser

@jrbowes Use GoReleaser QR Codes: Created in 1994

@jrbowes

@jrbowes $> GOOS=linux GOARCH=amd64 go build -o mybin .

@jrbowes $> GOOS=linux GOARCH=amd64 go build -o mybin . $>

cat Dockerfile FROM ubuntu ENTRYPOINT ["/mybin"] COPY mybin /

@jrbowes $> GOOS=linux GOARCH=amd64 go build -o mybin . $>

cat Dockerfile FROM ubuntu ENTRYPOINT ["/mybin"] COPY mybin / $> docker build -t mybin .

@jrbowes Good Multi-Platform Distribution ★ Support For Platforms You Care

@jrbowes ★ No Extra Dependencies • Compiles to native code

— no interpreter or VM • Statically linked — everything in one binary

@jrbowes ★ No Extra Dependencies • Compiles to native code

— no interpreter or VM • Statically linked — everything in one binary

@jrbowes Asset Bundling

@jrbowes Try Pkger

@jrbowes Try Pkger Mark Bates: Also created in 1994

@jrbowes Static Compilation

@jrbowes Static Compilation $> GOOS=linux GOARCH=amd64 go build -o mybin

.

@jrbowes Static Compilation $> GOOS=linux GOARCH=amd64 go build -o mybin

. $> file mybin

@jrbowes Static Compilation $> GOOS=linux GOARCH=amd64 go build -o mybin

. $> file mybin mybin: ELF 64-bit LSB executable, x86-64, version 1 (SYSV), statically linked, Go BuildID=9o-4CdGfdGNZI6qjvI3f/ NQvS9hSCir0F4HyOUCfA/NPmlomWGgx9zKs2QPYAW/ dOg15syGcYsIpCSJeV6o, not stripped

@jrbowes Static Compilation $> GOOS=linux GOARCH=amd64 go build -o mybin

. $> file mybin mybin: ELF 64-bit LSB executable, x86-64, version 1 (SYSV), statically linked, Go BuildID=9o-4CdGfdGNZI6qjvI3f/ NQvS9hSCir0F4HyOUCfA/NPmlomWGgx9zKs2QPYAW/ dOg15syGcYsIpCSJeV6o, not stripped $> GOOS=linux GOARCH=amd64 go build -o mybin-native .

@jrbowes Static Compilation $> GOOS=linux GOARCH=amd64 go build -o mybin

. $> file mybin mybin: ELF 64-bit LSB executable, x86-64, version 1 (SYSV), statically linked, Go BuildID=9o-4CdGfdGNZI6qjvI3f/ NQvS9hSCir0F4HyOUCfA/NPmlomWGgx9zKs2QPYAW/ dOg15syGcYsIpCSJeV6o, not stripped $> GOOS=linux GOARCH=amd64 go build -o mybin-native . $> file mybin-native

@jrbowes Static Compilation $> GOOS=linux GOARCH=amd64 go build -o mybin

. $> file mybin mybin: ELF 64-bit LSB executable, x86-64, version 1 (SYSV), statically linked, Go BuildID=9o-4CdGfdGNZI6qjvI3f/ NQvS9hSCir0F4HyOUCfA/NPmlomWGgx9zKs2QPYAW/ dOg15syGcYsIpCSJeV6o, not stripped $> GOOS=linux GOARCH=amd64 go build -o mybin-native . $> file mybin-native mybin-native: ELF 64-bit LSB executable, x86-64, version 1 (SYSV), dynamically linked, interpreter /lib64/ld-linux- x86-64.so.2, Go BuildID=qUlaMGoOyhvXwZau-GGh/ ItQcRvmsh30mFD0AG_Ze/SDeNJVYSF_TOVHk-06Dt/ BTU4CSv7GAsNuZKMxoIq, not stripped

@jrbowes Static Compilation $> GOOS=linux GOARCH=amd64 go build -o mybin

@jrbowes (Not So) Static Compilation $> ldd mybin linux-vdso.so.1 (0x00007fff55fd1000)

libpthread.so.0 => /lib/x86_64-linux-gnu/libpthread.so.0 … libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 … /lib64/ld-linux-x86-64.so.2 (0x00007f9574ffe000)

@jrbowes (Not So) Static Compilation $> ldd mybin linux-vdso.so.1 (0x00007fff55fd1000)

@jrbowes (Not So) Static Compilation

@jrbowes (Not So) Static Compilation $> ./my-bin

@jrbowes (Not So) Static Compilation $> ./my-bin /bin/sh: ./mybin: not

found

@jrbowes (Not So) Static Compilation $> ./my-bin /bin/sh: ./mybin: not

found $> ./not-real

@jrbowes (Not So) Static Compilation $> ./my-bin /bin/sh: ./mybin: not

found $> ./not-real /bin/sh: ./not-real: not found

@jrbowes (Not So) Static Compilation

@jrbowes (Not So) Static Compilation $> file mybin

@jrbowes (Not So) Static Compilation $> file mybin mybin: ELF

64-bit LSB executable, x86-64, version 1 (SYSV), dynamically linked, interpreter /lib64/ld-linux-x86-64.so.2, Go BuildID=qUlaMGoOyhvXwZau-GGh/ItQcRvmsh30mFD0AG_Ze/ SDeNJVYSF_TOVHk-06Dt/BTU4CSv7GAsNuZKMxoIq, not stripped

@jrbowes (Not So) Static Compilation $> file mybin mybin: ELF

64-bit LSB executable, x86-64, version 1 (SYSV), dynamically linked, interpreter /lib64/ld-linux-x86-64.so.2, Go BuildID=qUlaMGoOyhvXwZau-GGh/ItQcRvmsh30mFD0AG_Ze/ SDeNJVYSF_TOVHk-06Dt/BTU4CSv7GAsNuZKMxoIq, not stripped

@jrbowes Static Compilation “The cgo tool is enabled by default

for native builds on systems where it is expected to work.”

@jrbowes Disable cgo for easier distribution $> CGO_ENABLED=0 GOOS=linux GOARCH=386

\ go build -o mybin .

@jrbowes Good Multi-Platform Distribution ★ Support For Platforms You Care

@jrbowes ★ Broadly Compatible • Consistent behaviour across platforms •

Consistent support for features and packages

@jrbowes ★ Broadly Compatible The bright side of Not Invented

Here syndrome

@jrbowes Platform Speciﬁc Logic

@jrbowes Platform Speciﬁc Logic func (c Certificate) Verify(opts VerifyOptions)(chains [][]Certificate,

err error)

@jrbowes Platform Speciﬁc Logic func (c Certificate) Verify(opts VerifyOptions)(chains [][]Certificate,

err error) type VerifyOptions struct { DNSName string Intermediates *CertPool Roots *CertPool // if nil, the system roots are used …

@jrbowes Platform Speciﬁc Logic // Use Windows's own verification and

chain building. if opts.Roots == nil && runtime.GOOS == "windows" { return c.systemVerify(&opts) }

@jrbowes Platform Speciﬁc Logic // root_unix.go func (c *Certificate) systemVerify(opts

*VerifyOptions) (chains [][]*Certificate, err error) { return nil, nil } // root_windows.go // systemVerify is like Verify, except that it uses CryptoAPI calls // to build certificate chains and verify them. func (c *Certificate) systemVerify(opts *VerifyOptions) (chains [][]*Certificate, err error) { hasDNSName := opts != nil && len(opts.DNSName) > 0 storeCtx, err := createStoreContext(c, opts) …

@jrbowes Build Tags • Implicit: GOOS, GOARCH, go version… •

Explicit: go build -tags 'mytag'

@jrbowes Build Tags // root_unix.go func (c Certificate) systemVerify(opts VerifyOptions)

(chains [][]*Certificate, err error) { return nil, nil } // root_windows.go // systemVerify is like Verify, except that it uses CryptoAPI calls // to build certificate chains and verify them. func (c *Certificate) systemVerify(opts *VerifyOptions) (chains [][]*Certificate, err error) { hasDNSName := opts != nil && len(opts.DNSName) > 0 storeCtx, err := createStoreContext(c, opts) …

Write Once, Compile Lots, Run Anywhere

Write Once, Compile Lots, Run Anywhere

More Decks by James Bowes

Other Decks in Programming

Featured

Transcript