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Merge pull request #4858 from proppy/cross-go2docker 

contrib/go2docker: always cross compile binary to linux_amd64
pull/6/head
Tim Hockin 2015-02-26 14:24:08 -08:00
parent d085cd21f4 1322421a8a
commit 672c55bdb3
3 changed files with 4531 additions and 3 deletions
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2
contrib/go2docker/README.md
View File

@ -6,7 +6,7 @@
`SCRATCH` for go packages.
It is based on the [Docker Image Specification v1.0.0](https://github.com/docker/docker/blob/master/image/spec/v1.md).
l
## Usage
```
go2docker [-image NAMESPACE/BASENAME] [PACKAGES]

4480
contrib/go2docker/cacerts.go Normal file
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52
contrib/go2docker/go2docker.go
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@ -27,6 +27,7 @@ import (
"encoding/hex"
"encoding/json"
"flag"
"fmt"
"io"
"io/ioutil"
"log"
@ -68,6 +69,27 @@ func main() {
args = flag.Args()
}
// check for go
goBin, err := exec.LookPath("go")
if err != nil {
log.Fatalf("`go` executable not found: %v, see %q ", err, "golang.org/doc/install")
}
toolPath := filepath.Dir(goBin)
// check for linux_amd64 toolchain
crossPath := filepath.Join(toolPath, "linux_amd64")
if _, crossErr := os.Stat(crossPath); os.IsNotExist(crossErr) {
// check for make.bash
makeBash, err := filepath.Abs(filepath.Join(toolPath, "..", "src", "make.bash"))
if err != nil {
log.Fatalf("failed to resolve make.bash path: %v", err)
}
if _, err := os.Stat(makeBash); os.IsNotExist(err) {
log.Fatalf("`make.bash` not found %q: %v", err)
}
makeBashCmd := fmt.Sprintf("(cd %s; GOOS=linux GOARCH=amd64 ./make.bash --no-clean)", filepath.Dir(makeBash))
log.Fatalf("`go %s` toolchain not found: %v, run: %q", "linux_amd64", crossErr, makeBashCmd)
}
fpath, err := filepath.Abs(args[0])
ext := filepath.Ext(fpath)
basename := filepath.Base(fpath[:len(fpath)-len(ext)])
@ -84,9 +106,25 @@ func main() {
}
aout := filepath.Join(tmpDir, basename)
command := append([]string{"go", "build", "-o", aout, "-a", "-tags", "netgo", "-installsuffix", "netgo"}, args...)
if _, err := exec.Command(command[0], command[1:]...).Output(); err != nil {
log.Fatalf("failed to run command %q: %v", strings.Join(command, " "), err)
cmd := exec.Command(command[0], command[1:]...)
gopath := os.Getenv("GOPATH")
cmd.Env = []string{
"GOOS=linux",
"GOARCH=amd64",
"GOPATH=" + gopath,
}
stderr, err := cmd.StderrPipe()
if err != nil {
log.Fatalf("failed to get process stderr: %v", err)
}
if err := cmd.Start(); err != nil {
log.Fatalf("failed to start command %q: %v", strings.Join(command, " "), err)
}
io.Copy(os.Stderr, stderr)
if err := cmd.Wait(); err != nil {
log.Fatalf("command %q failed: %v", strings.Join(command, " "), err)
}
imageIDBytes := make([]byte, 32)
if _, err := rand.Read(imageIDBytes); err != nil {
log.Fatalf("failed to generate ID: %v")
@ -160,6 +198,16 @@ func main() {
if _, err := io.Copy(ftw, file); err != nil {
log.Fatalf("failed to write /%s body: %v", aout, err)
}
certBytes := []byte(caCerts)
if err := ftw.WriteHeader(&tar.Header{
Name: "/etc/ssl/certs/ca-certificates.crt",
Size: int64(len(certBytes)),
}); err != nil {
log.Fatalf("failed to write ca-certificates.crt header: %v", err)
}
if _, err := ftw.Write(certBytes); err != nil {
log.Fatalf("failed to write ca-certificates.crt body: %v", err)
}
if err := ftw.Close(); err != nil {
log.Fatalf("failed to close layer.tar: %v", err)
}