mirror of https://github.com/aptly-dev/aptly
56 lines
1.2 KiB
Go
56 lines
1.2 KiB
Go
package cmd
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import (
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"io"
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"os"
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"strings"
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"github.com/smira/flag"
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)
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// StringOrFileFlag is a custom flag type that can handle both string input and file input.
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// If the input starts with '@', it is treated as a filename and the contents are read from the file.
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// If the input is '@-', the contents are read from stdin.
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type StringOrFileFlag struct {
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value string
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}
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func (s *StringOrFileFlag) String() string {
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return s.value
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}
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func (s *StringOrFileFlag) Set(value string) error {
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var err error
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s.value, err = GetStringOrFileContent(value)
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return err
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}
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func (s *StringOrFileFlag) Get() any {
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return s.value
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}
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func AddStringOrFileFlag(flagSet *flag.FlagSet, name string, value string, usage string) *StringOrFileFlag {
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result := &StringOrFileFlag{value: value}
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flagSet.Var(result, name, usage)
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return result
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}
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func GetStringOrFileContent(value string) (string, error) {
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if !strings.HasPrefix(value, "@") {
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return value, nil
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}
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filename := strings.TrimPrefix(value, "@")
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var data []byte
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var err error
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if filename == "-" { // Read from stdin
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data, err = io.ReadAll(os.Stdin)
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} else {
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data, err = os.ReadFile(filename)
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}
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if err != nil {
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return "", err
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}
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return string(data), nil
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}
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