/
main.go
88 lines (77 loc) · 1.58 KB
/
main.go
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package main
import (
"bytes"
"flag"
"go/build"
"io/ioutil"
"log"
"os"
"os/exec"
"path/filepath"
)
const filename = "/tmp/fperf_main.go"
type option struct {
output string
verbose bool
}
func gobuild(o *option, imports []string) error {
buf := bytes.NewBuffer(nil)
buf.WriteString("package main\n")
buf.WriteString(`import "github.com/fperf/fperf"` + "\n")
for _, imp := range imports {
buf.WriteString(`import _ "` + imp + `"` + "\n")
}
buf.WriteString(`
func main() {
fperf.Main()
}
`)
if err := ioutil.WriteFile(filename, buf.Bytes(), 0655); err != nil {
log.Fatalln(err)
}
defer os.Remove(filename)
args := []string{"build", "-o", o.output, filename}
if o.verbose {
args = append(args, "-v")
}
cmd := exec.Command("go", args...)
cmd.Stderr = os.Stderr
cmd.Stdout = os.Stdout
if err := cmd.Run(); err != nil {
return err
}
return nil
}
func main() {
o := &option{}
flag.StringVar(&o.output, "o", "fperf", "build output")
flag.BoolVar(&o.verbose, "v", false, "print the names of packages as they are compiled.")
flag.Parse()
paths := flag.Args()
cwd, err := os.Getwd()
if err != nil {
log.Fatalln(err)
}
if len(paths) == 0 {
paths = append(paths, cwd)
}
imports := make([]string, len(paths))
for i := range paths {
path := paths[i]
if filepath.IsAbs(path) {
var err error
path, err = filepath.Rel(cwd, path)
if err != nil {
log.Fatalln(err)
}
}
p, err := build.Import(path, cwd, 0)
if err != nil {
log.Fatalln(err)
}
imports[i] = p.ImportPath
}
if err := gobuild(o, imports); err != nil {
log.Fatalln(err)
}
}