use cached git config

pkg/commands/git_config/get_key.go

@@ -0,0 +1,56 @@
+package git_config
+
+import (
+	"bytes"
+	"fmt"
+	"io/ioutil"
+	"os/exec"
+	"strings"
+	"syscall"
+
+	"github.com/jesseduffield/lazygit/pkg/secureexec"
+)
+
+// including license from https://github.com/tcnksm/go-gitconfig because this file is an adaptation of that repo's code
+// Copyright (c) 2014 tcnksm
+
+// MIT License
+
+// Permission is hereby granted, free of charge, to any person obtaining
+// a copy of this software and associated documentation files (the
+// "Software"), to deal in the Software without restriction, including
+// without limitation the rights to use, copy, modify, merge, publish,
+// distribute, sublicense, and/or sell copies of the Software, and to
+// permit persons to whom the Software is furnished to do so, subject to
+// the following conditions:
+
+// The above copyright notice and this permission notice shall be
+// included in all copies or substantial portions of the Software.
+
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+func getGitConfigValue(key string) (string, error) {
+	gitArgs := []string{"config", "--get", "--null", key}
+	var stdout bytes.Buffer
+	cmd := secureexec.Command("git", gitArgs...)
+	cmd.Stdout = &stdout
+	cmd.Stderr = ioutil.Discard
+
+	err := cmd.Run()
+	if exitError, ok := err.(*exec.ExitError); ok {
+		if waitStatus, ok := exitError.Sys().(syscall.WaitStatus); ok {
+			if waitStatus.ExitStatus() == 1 {
+				return "", fmt.Errorf("the key `%s` is not found", key)
+			}
+		}
+		return "", err
+	}
+
+	return strings.TrimRight(stdout.String(), "\000"), nil
+}