Hilbish/readline/editor.go

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1.6 KiB
Go
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//go:build !windows
// +build !windows
package readline
import (
"crypto/md5"
"encoding/hex"
"io/ioutil"
"os"
"path/filepath"
"strconv"
"time"
)
// writeTempFile - This function optionally accepts a filename (generally specified with an extension).
func (rl *Instance) writeTempFile(content []byte, filename string) (string, error) {
// The final path to the buffer on disk
var path string
// If the user has not provided any filename (including an extension)
// we generate a random filename with no extension.
if filename == "" {
fileID := strconv.Itoa(time.Now().Nanosecond()) + ":" + string(rl.line)
h := md5.New()
_, err := h.Write([]byte(fileID))
if err != nil {
return "", err
}
name := "readline-" + hex.EncodeToString(h.Sum(nil)) + "-" + strconv.Itoa(os.Getpid())
path = filepath.Join(rl.TempDirectory, name)
} else {
// Else, still use the temp/ dir, but with the provided filename
path = filepath.Join(rl.TempDirectory, filename)
}
file, err := os.Create(path)
if err != nil {
return "", err
}
defer file.Close()
_, err = file.Write(content)
return path, err
}
func readTempFile(name string) ([]byte, error) {
file, err := os.Open(name)
if err != nil {
return nil, err
}
b, err := ioutil.ReadAll(file)
if err != nil {
return nil, err
}
if len(b) > 0 && b[len(b)-1] == '\n' {
b = b[:len(b)-1]
}
if len(b) > 0 && b[len(b)-1] == '\r' {
b = b[:len(b)-1]
}
if len(b) > 0 && b[len(b)-1] == '\n' {
b = b[:len(b)-1]
}
if len(b) > 0 && b[len(b)-1] == '\r' {
b = b[:len(b)-1]
}
err = os.Remove(name)
return b, err
}