syncthing/vendor/github.com/onsi/gomega/gexec/build.go
Jakob Borg 65aaa607ab Use Go 1.5 vendoring instead of Godeps
Change made by:

- running "gvt fetch" on each of the packages mentioned in
  Godeps/Godeps.json
- `rm -rf Godeps`
- tweaking the build scripts to not mention Godeps
- tweaking the build scripts to test `./lib/...`, `./cmd/...` explicitly
  (to avoid testing vendor)
- tweaking the build scripts to not juggle GOPATH for Godeps and instead
  set GO15VENDOREXPERIMENT.

This also results in some updated packages at the same time I bet.

Building with Go 1.3 and 1.4 still *works* but won't use our vendored
dependencies - the user needs to have the actual packages in their
GOPATH then, which they'll get with a normal "go get". Building with Go
1.6+ will get our vendored dependencies by default even when not using
our build script, which is nice.

By doing this we gain some freedom in that we can pick and choose
manually what to include in vendor, as it's not based on just dependency
analysis of our own code. This is also a risk as we might pick up
dependencies we are unaware of, as the build may work locally with those
packages present in GOPATH. On the other hand the build server will
detect this as it has no packages in it's GOPATH beyond what is included
in the repo.

Recommended tool to manage dependencies is github.com/FiloSottile/gvt.
2016-03-05 21:21:24 +01:00

79 lines
1.9 KiB
Go

package gexec
import (
"errors"
"fmt"
"io/ioutil"
"os"
"os/exec"
"path"
"path/filepath"
"runtime"
)
var tmpDir string
/*
Build uses go build to compile the package at packagePath. The resulting binary is saved off in a temporary directory.
A path pointing to this binary is returned.
Build uses the $GOPATH set in your environment. It passes the variadic args on to `go build`.
*/
func Build(packagePath string, args ...string) (compiledPath string, err error) {
return BuildIn(os.Getenv("GOPATH"), packagePath, args...)
}
/*
BuildIn is identical to Build but allows you to specify a custom $GOPATH (the first argument).
*/
func BuildIn(gopath string, packagePath string, args ...string) (compiledPath string, err error) {
tmpDir, err := temporaryDirectory()
if err != nil {
return "", err
}
if len(gopath) == 0 {
return "", errors.New("$GOPATH not provided when building " + packagePath)
}
executable := filepath.Join(tmpDir, path.Base(packagePath))
if runtime.GOOS == "windows" {
executable = executable + ".exe"
}
cmdArgs := append([]string{"build"}, args...)
cmdArgs = append(cmdArgs, "-o", executable, packagePath)
build := exec.Command("go", cmdArgs...)
build.Env = append([]string{"GOPATH=" + gopath}, os.Environ()...)
output, err := build.CombinedOutput()
if err != nil {
return "", fmt.Errorf("Failed to build %s:\n\nError:\n%s\n\nOutput:\n%s", packagePath, err, string(output))
}
return executable, nil
}
/*
You should call CleanupBuildArtifacts before your test ends to clean up any temporary artifacts generated by
gexec. In Ginkgo this is typically done in an AfterSuite callback.
*/
func CleanupBuildArtifacts() {
if tmpDir != "" {
os.RemoveAll(tmpDir)
}
}
func temporaryDirectory() (string, error) {
var err error
if tmpDir == "" {
tmpDir, err = ioutil.TempDir("", "gexec_artifacts")
if err != nil {
return "", err
}
}
return ioutil.TempDir(tmpDir, "g")
}