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Simplify quoted string argument parsing

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RevanProdigalKnight 2022-05-13 21:39:20 -06:00 committed by GitHub
parent 286ab64d67
commit 7a6809f66c
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1 changed files with 13 additions and 28 deletions
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41
src/Terminal/Parser.ts
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@ -12,8 +12,7 @@ function parseArg(arg: string): string | number | boolean {
return arg === "true";
}
// Strip quotation marks from strings that begin/end with the same mark
return arg.replace(/^"(.*?)"$/g, "$1").replace(/^'(.*?)'$/g, "$1");
return arg;
}
export function ParseCommands(commands: string): string[] {
@ -45,8 +44,7 @@ export function ParseCommand(command: string): (string | number | boolean)[] {
let idx = 0;
const args = [];
// Track depth of quoted strings, e.g.: "the're 'going away' rather 'quickly \"and awkwardly\"'" should be parsed as a single string
const quotes: string[] = [];
let lastQuote = "";
let arg = "";
while (idx < command.length) {
@ -57,33 +55,20 @@ export function ParseCommand(command: string): (string | number | boolean)[] {
arg += command.charAt(++idx);
// If the current character is a single- or double-quote mark, add it to the current argument.
} else if (c === KEY.DOUBLE_QUOTE || c === KEY.QUOTE) {
arg += c;
const quote = quotes[quotes.length - 1];
const prev = command.charAt(idx - 1);
const next = command.charAt(idx + 1);
// If the previous character is a space or an equal sign this is a valid start to a new string.
// If we're already in a quoted string, push onto the stack of string starts to track depth.
if (
c !== quote &&
(prev === KEY.SPACE ||
prev === KEY.EQUAL ||
(c === KEY.DOUBLE_QUOTE && prev === KEY.QUOTE) ||
(c === KEY.QUOTE && prev === KEY.DOUBLE_QUOTE))
) {
quotes.push(c);
// If the next character is a space and the current character is the same as the previously used
// quotation mark, this is a valid end to a string. Pop off the depth tracker.
} else if (
c === quote &&
(next === KEY.SPACE ||
(c === KEY.DOUBLE_QUOTE && next === KEY.QUOTE) ||
(c === KEY.QUOTE && next === KEY.DOUBLE_QUOTE))
) {
quotes.pop();
// If we're currently in a quoted string argument and this quote mark is the same as the beginning,
// the string is done
if (lastQuote !== "" && c === lastQuote) {
lastQuote = "";
// Otherwise if we're not in a string argument, we've begun one
} else if (lastQuote === "") {
lastQuote = c;
// Otherwise if we're in a string argument, add the current character to it
} else {
arg += c;
}
// If the current character is a space and we are not inside a string, parse the current argument
// and start a new one
} else if (c === KEY.SPACE && quotes.length === 0) {
} else if (c === KEY.SPACE && lastQuote === "") {
args.push(parseArg(arg));
arg = "";