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Show failed command and its output. #182

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Show failed command and its output. #182

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6 changes: 5 additions & 1 deletion internal/generate/generate.go
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Original file line number Diff line number Diff line change
Expand Up @@ -71,7 +71,11 @@ func common(directory string) ([]*goModDownload, map[string]string, error) {
cmd.Dir = directory
stdout, err := cmd.Output()
if err != nil {
return nil, nil, err
if exiterr, ok := err.(*exec.ExitError); ok {
return nil, nil, fmt.Errorf("Failed to run 'go mod download --json: %s\n%s", exiterr, exiterr.Stderr)
} else {
return nil, nil, fmt.Errorf("Failed to run 'go mod download --json': %s", err)
}
}

dec := json.NewDecoder(bytes.NewReader(stdout))
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