M.V. Hutz
82e1570c2c
Added -f flag to allow reading lambda expressions from files. Changes: - Add FileSource type to read from file paths. - Add -f flag to command-line parser. - Implement validation to prevent conflicting -f and positional arguments.
42 lines
759 B
Go
42 lines
759 B
Go
package config
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import (
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"io"
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"os"
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)
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// A method of extracting input from the user.
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type Source interface {
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// Fetch data from this source.
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Extract() (string, error)
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}
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// A source defined by a string.
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type StringSource struct{ Data string }
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func (s StringSource) Extract() (string, error) { return s.Data, nil }
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// A source pulling from standard input.
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type StdinSource struct{}
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func (s StdinSource) Extract() (string, error) {
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data, err := io.ReadAll(os.Stdin)
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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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// A source reading from a file.
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type FileSource struct{ Path string }
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func (s FileSource) Extract() (string, error) {
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data, err := os.ReadFile(s.Path)
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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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