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72 lines
1.8 KiB
72 lines
1.8 KiB
package main
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import (
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"bufio"
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"bytes"
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"errors"
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"fmt"
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"io"
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"io/ioutil"
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"os"
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"os/exec"
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"strings"
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)
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const defaultCommitFileMsgTpl = `%s
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# Please enter the description for your commit(s). Lines starting with '#' will
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# be ignored, and an empty message aborts the commit.`
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func tmpFileMsg(tpl string, args ...interface{}) (string, error) {
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editor := os.Getenv("EDITOR")
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if editor == "" {
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return "", errors.New("EDITOR not set, please set it or use -msg in order to create your commit message")
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} else if _, err := os.Stat(editor); err != nil {
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return "", fmt.Errorf("could not stat EDITOR %q: %w", editor, err)
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}
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tmpf, err := ioutil.TempFile("", "dehub.*.txt")
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if err != nil {
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return "", fmt.Errorf("could not open temp file: %w", err)
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}
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tmpfName := tmpf.Name()
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defer os.Remove(tmpfName)
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tmpBody := bytes.NewBufferString(fmt.Sprintf(tpl, args...))
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_, err = io.Copy(tmpf, tmpBody)
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tmpf.Close()
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if err != nil {
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return "", fmt.Errorf("could not write helper message to temp file %q: %w", tmpfName, err)
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}
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cmd := exec.Command(editor, tmpfName)
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cmd.Stdin = os.Stdin
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cmd.Stdout = os.Stdout
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cmd.Stderr = os.Stderr
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if err := cmd.Run(); err != nil {
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return "", fmt.Errorf("error running '%s %q': %w", editor, tmpfName, err)
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}
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body, err := ioutil.ReadFile(tmpfName)
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if err != nil {
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return "", fmt.Errorf("error retrieving message body from %q: %w", tmpfName, err)
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}
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bodyFiltered := new(bytes.Buffer)
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bodyBR := bufio.NewReader(bytes.NewBuffer(body))
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for {
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line, err := bodyBR.ReadString('\n')
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if errors.Is(err, io.EOF) {
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break
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} else if err != nil {
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return "", fmt.Errorf("error reading from buffered body: %w", err)
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}
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if !strings.HasPrefix(strings.TrimSpace(line), "#") {
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bodyFiltered.WriteString(line)
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}
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}
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return strings.TrimSpace(bodyFiltered.String()), nil
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}
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