/
helper.go
149 lines (129 loc) · 2.82 KB
/
helper.go
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package parser
import (
"fmt"
"go/build"
"io"
"io/ioutil"
"math/rand"
"os"
"path"
"path/filepath"
"text/template"
)
var goPath = getGopath()
func parseTemplate(tmpName, projectRoot, outUri string, data interface{}) error {
tplPath := path.Join(goPath, "src", "github.com/relato/gingogen", tmpName)
tmpl, err := template.ParseFiles(tplPath)
if err != nil {
return err
}
outPath := path.Join(goPath, "src", projectRoot, outUri)
file, err := os.Create(outPath)
if err != nil {
return err
}
defer file.Close()
return tmpl.Execute(file, data)
}
func getGopath() string {
gopath := os.Getenv("GOPATH")
if gopath == "" {
gopath = build.Default.GOPATH
}
return gopath
}
// CopyDir recursively copies a directory tree, attempting to preserve permissions.
// Source directory must exist, destination directory must *not* exist.
// Symlinks are ignored and skipped.
func CopyDir(src string, dst string) (err error) {
src = filepath.Clean(src)
dst = filepath.Clean(dst)
si, err := os.Stat(src)
if err != nil {
return err
}
if !si.IsDir() {
return fmt.Errorf("source is not a directory")
}
_, err = os.Stat(dst)
if err != nil && !os.IsNotExist(err) {
return
}
if err == nil {
return fmt.Errorf("destination already exists")
}
err = os.MkdirAll(dst, si.Mode())
if err != nil {
return
}
entries, err := ioutil.ReadDir(src)
if err != nil {
return
}
for _, entry := range entries {
srcPath := filepath.Join(src, entry.Name())
dstPath := filepath.Join(dst, entry.Name())
if entry.IsDir() {
err = CopyDir(srcPath, dstPath)
if err != nil {
return
}
} else {
// Skip symlinks.
if entry.Mode()&os.ModeSymlink != 0 {
continue
}
err = CopyFile(srcPath, dstPath)
if err != nil {
return
}
}
}
return
}
// CopyFile copies the contents of the file named src to the file named
// by dst. The file will be created if it does not already exist. If the
// destination file exists, all it's contents will be replaced by the contents
// of the source file. The file mode will be copied from the source and
// the copied data is synced/flushed to stable storage.
func CopyFile(src, dst string) (err error) {
in, err := os.Open(src)
if err != nil {
return
}
defer in.Close()
out, err := os.Create(dst)
if err != nil {
return
}
defer func() {
if e := out.Close(); e != nil {
err = e
}
}()
_, err = io.Copy(out, in)
if err != nil {
return
}
err = out.Sync()
if err != nil {
return
}
si, err := os.Stat(src)
if err != nil {
return
}
err = os.Chmod(dst, si.Mode())
if err != nil {
return
}
return
}
var letterRunes = []rune("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ123456789~!@#$%^&*()_+")
func randomString(n int) string {
b := make([]rune, n)
for i := range b {
b[i] = letterRunes[rand.Intn(len(letterRunes))]
}
return string(b)
}