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|
package main
import (
"bytes"
"io/ioutil"
"log"
"os"
"path/filepath"
"strings"
"text/template"
"golang.org/x/tools/imports"
)
var (
tmpl = template.Must(template.New("var").Parse(`
// CODE GENERATED. DO NOT EDIT
package {{.PkgName }}
var (
{{ .Name }} = ` + "`" + `{{.Value}}` + "`" + `
)
`))
)
type vars struct {
PkgName string
Name string
Value string
}
func main() {
log.SetFlags(log.LstdFlags | log.Lshortfile)
if len(os.Args) < 3 {
log.Fatalf("Usage: %s file varname [output]", os.Args[0])
}
fname := os.Args[1]
targetVar := os.Args[2]
pkg := os.Getenv("GOPACKAGE")
absFilePath, err := filepath.Abs(fname)
targetFName := strings.ToLower(targetVar) + ".go"
if len(os.Args) > 3 {
targetFName = os.Args[3]
}
log.Println(absFilePath, "=>", targetFName)
if err != nil {
log.Fatal(err)
}
b, err := ioutil.ReadFile(fname)
if err != nil {
log.Fatal(err)
}
if _, err := os.Stat(absFilePath); err != nil {
os.Remove(absFilePath)
}
buff := bytes.Buffer{}
err = tmpl.Execute(&buff, vars{
Name: targetVar,
Value: string(b),
PkgName: pkg,
})
if err != nil {
log.Fatal(err)
}
data, err := imports.Process(targetFName, buff.Bytes(), nil)
if err != nil {
log.Fatal(err)
}
f, err := os.Create(targetFName)
if err != nil {
log.Fatal(err)
}
_, err = f.Write(data)
if err != nil {
log.Fatal(err)
}
}
|
