/
main.go
126 lines (109 loc) · 2.41 KB
/
main.go
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//Use configo-build to build a conf generator
package main
import (
"flag"
"fmt"
"io/ioutil"
"log"
"os"
"os/exec"
"path"
"strings"
"golang.org/x/tools/go/packages"
)
var source = `package main
import(
"flag"
"fmt"
"io/ioutil"
"os"
"github.com/shafreeck/configo"
"%s" // the config package
)
func main() {
base := ""
test := ""
flag.StringVar(&base, "patch", "", "the base conf that to patch")
flag.StringVar(&test, "test", "", "try to load the configuration file")
flag.Parse()
config := %s{} //the struct
if base != "" {
baseData, err := ioutil.ReadFile(base)
if err != nil {
fmt.Println(err)
return
}
if data, err := configo.Patch(baseData, config); err != nil {
fmt.Println(err)
return
} else {
if err := ioutil.WriteFile(base, data, os.ModePerm&0644); err != nil {
fmt.Println(err)
}
}
return
}
if test != "" {
if err := configo.Load(test, &config); err != nil {
fmt.Println(err)
} else {
fmt.Println(config)
fmt.Println("Load successfully !")
}
return
}
if data, err := configo.Marshal(config); err != nil {
fmt.Println(err)
return
} else {
fmt.Println(string(data))
}
}
`
func main() {
genCode := false
flag.Usage = func() {
fmt.Println("Usage:")
fmt.Printf(" %s [option] <package>.<struct>\n", os.Args[0])
flag.PrintDefaults()
}
flag.BoolVar(&genCode, "gencode", false, "generate source code")
flag.Parse()
args := flag.Args()
if len(args) != 1 {
flag.Usage()
return
}
// Parse the package path and struct name
target := args[0]
idx := strings.LastIndex(target, ".")
if idx < 0 {
log.Fatalln("Invalid package format, expected <package>.<struct name>")
}
p := target[0:idx]
st := path.Base(p) + "." + target[idx+1:]
pkgs, err := packages.Load(nil, p)
if err != nil {
log.Fatalln(err)
}
if len(pkgs) != 1 {
log.Fatalln("Package is not found", p)
}
pkg := pkgs[0]
code := fmt.Sprintf(source, pkg, st)
if genCode {
fmt.Print(code)
return
}
tmpFile := fmt.Sprintf("/tmp/%s.pkg.go", st)
if err := ioutil.WriteFile(tmpFile, []byte(code), os.ModePerm&0660); err != nil {
log.Fatalln(err)
}
out := strings.ToLower(st) + ".cfg"
cmd := exec.Command("go", "build", "-o", out, tmpFile)
cmd.Stderr = os.Stderr
cmd.Stdout = os.Stdout
if err := cmd.Run(); err != nil {
log.Fatalln(err)
}
}