30 lines
513 B
Go
30 lines
513 B
Go
package cmd
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import (
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"errors"
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"fmt"
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"os/exec"
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"strings"
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)
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var ErrNotFound = errors.New("which: command not found")
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func Which(cmd string) (string, error) {
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command := exec.Command("which", cmd)
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outputBytes, err := command.Output()
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if err != nil {
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var exitErr *exec.ExitError
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if errors.As(err, &exitErr) {
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if exitErr.ExitCode() == 1 {
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return "", ErrNotFound
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} else {
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return "", fmt.Errorf("command error: %w", err)
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}
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}
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}
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return strings.Trim(string(outputBytes), "\n"), nil
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}
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