87 lines
2.2 KiB
Go
87 lines
2.2 KiB
Go
/*
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* Copyright (c) 2024 The GoPlus Authors (goplus.org). All rights reserved.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package shellparse
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import (
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"fmt"
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"strings"
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"unicode"
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)
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// Parse parses a shell command string into command and arguments,
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// properly handling quoted arguments with spaces
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func Parse(cmd string) ([]string, error) {
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args := make([]string, 0)
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var current strings.Builder
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var inQuotes bool
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var quoteChar rune
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var hasContent bool // Track if we've seen content (including empty quotes)
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runes := []rune(cmd)
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for i := 0; i < len(runes); i++ {
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r := runes[i]
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switch {
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case !inQuotes && (r == '"' || r == '\''):
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// Start of quoted string
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inQuotes = true
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quoteChar = r
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hasContent = true // Empty quotes still count as content
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case inQuotes && r == quoteChar:
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// End of quoted string
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inQuotes = false
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quoteChar = 0
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case !inQuotes && unicode.IsSpace(r):
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// Space outside quotes - end current argument
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if hasContent {
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args = append(args, current.String())
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current.Reset()
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hasContent = false
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}
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case inQuotes && r == '\\' && i+1 < len(runes):
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// Handle escape sequences in quotes
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if quoteChar == '"' {
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next := runes[i+1]
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if next == quoteChar || next == '\\' {
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current.WriteRune(next)
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i++ // Skip the next rune
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} else {
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current.WriteRune(r)
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}
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} else {
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// In single quotes, backslash is a literal character.
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current.WriteRune(r)
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}
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default:
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// Regular character
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current.WriteRune(r)
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hasContent = true
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}
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}
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// Handle unterminated quotes
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if inQuotes {
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return nil, fmt.Errorf("unterminated quote in command: %s", cmd)
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}
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// Add final argument if any
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if hasContent {
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args = append(args, current.String())
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}
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return args, nil
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}
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