forked from mystiq/dex
112 lines
2.8 KiB
Go
112 lines
2.8 KiB
Go
package gexec
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import (
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"errors"
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"fmt"
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"go/build"
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"io/ioutil"
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"os"
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"os/exec"
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"path"
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"path/filepath"
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"runtime"
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"strings"
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"sync"
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)
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var (
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mu sync.Mutex
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tmpDir string
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)
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/*
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Build uses go build to compile the package at packagePath. The resulting binary is saved off in a temporary directory.
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A path pointing to this binary is returned.
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Build uses the $GOPATH set in your environment. If $GOPATH is not set and you are using Go 1.8+,
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it will use the default GOPATH instead. It passes the variadic args on to `go build`.
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*/
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func Build(packagePath string, args ...string) (compiledPath string, err error) {
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return doBuild(build.Default.GOPATH, packagePath, nil, args...)
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}
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/*
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BuildWithEnvironment is identical to Build but allows you to specify env vars to be set at build time.
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*/
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func BuildWithEnvironment(packagePath string, env []string, args ...string) (compiledPath string, err error) {
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return doBuild(build.Default.GOPATH, packagePath, env, args...)
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}
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/*
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BuildIn is identical to Build but allows you to specify a custom $GOPATH (the first argument).
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*/
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func BuildIn(gopath string, packagePath string, args ...string) (compiledPath string, err error) {
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return doBuild(gopath, packagePath, nil, args...)
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}
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func replaceGoPath(environ []string, newGoPath string) []string {
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newEnviron := []string{}
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for _, v := range environ {
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if !strings.HasPrefix(v, "GOPATH=") {
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newEnviron = append(newEnviron, v)
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}
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}
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return append(newEnviron, "GOPATH="+newGoPath)
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}
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func doBuild(gopath, packagePath string, env []string, args ...string) (compiledPath string, err error) {
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tmpDir, err := temporaryDirectory()
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if err != nil {
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return "", err
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}
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if len(gopath) == 0 {
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return "", errors.New("$GOPATH not provided when building " + packagePath)
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}
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executable := filepath.Join(tmpDir, path.Base(packagePath))
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if runtime.GOOS == "windows" {
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executable = executable + ".exe"
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}
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cmdArgs := append([]string{"build"}, args...)
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cmdArgs = append(cmdArgs, "-o", executable, packagePath)
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build := exec.Command("go", cmdArgs...)
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build.Env = replaceGoPath(os.Environ(), gopath)
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build.Env = append(build.Env, env...)
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output, err := build.CombinedOutput()
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if err != nil {
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return "", fmt.Errorf("Failed to build %s:\n\nError:\n%s\n\nOutput:\n%s", packagePath, err, string(output))
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}
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return executable, nil
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}
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/*
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You should call CleanupBuildArtifacts before your test ends to clean up any temporary artifacts generated by
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gexec. In Ginkgo this is typically done in an AfterSuite callback.
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*/
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func CleanupBuildArtifacts() {
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mu.Lock()
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defer mu.Unlock()
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if tmpDir != "" {
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os.RemoveAll(tmpDir)
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tmpDir = ""
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}
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}
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func temporaryDirectory() (string, error) {
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var err error
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mu.Lock()
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defer mu.Unlock()
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if tmpDir == "" {
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tmpDir, err = ioutil.TempDir("", "gexec_artifacts")
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if err != nil {
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return "", err
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}
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}
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return ioutil.TempDir(tmpDir, "g")
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}
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