45 lines
835 B
Go
45 lines
835 B
Go
package instruction
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import (
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"strings"
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)
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// Parse from a raw line
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func Parse(raw string) (T, error) {
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// 1. format (trim + split first space)
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split := strings.SplitN(raw, " ", 2)
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if len(split) < 2 { // at least 1 command + arguments
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return nil, ErrInvalidSyntax
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}
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split[0] = strings.Trim(split[0], " \t")
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// 2. fail if invalid base syntax 'cmd args...'
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split[1] = strings.Trim(split[1], " \t")
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// 3. Extract instruction type
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switch split[0] {
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case "install":
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i := &install{}
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err := i.Build(split[1])
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return i, err
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case "delete":
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i := &delete{}
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err := i.Build(split[1])
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return i, err
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case "service":
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i := &service{}
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err := i.Build(split[1])
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return i, err
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case "set":
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i := &set{}
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err := i.Build(split[1])
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return i, err
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default:
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return nil, ErrUnknownInstruction
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}
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// return nil, nil
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}
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