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326 lines
8.1 KiB
TypeScript
326 lines
8.1 KiB
TypeScript
// globToRegExp() is originall ported from globrex@0.1.2.
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// Copyright 2018 Terkel Gjervig Nielsen. All rights reserved. MIT license.
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// Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
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// This module is browser compatible.
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import { NATIVE_OS } from "./_constants.ts";
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import { join, normalize } from "./mod.ts";
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import { SEP, SEP_PATTERN } from "./separator.ts";
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export interface GlobOptions {
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/** Extended glob syntax.
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* See https://www.linuxjournal.com/content/bash-extended-globbing. Defaults
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* to true. */
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extended?: boolean;
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/** Globstar syntax.
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* See https://www.linuxjournal.com/content/globstar-new-bash-globbing-option.
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* If false, `**` is treated like `*`. Defaults to true. */
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globstar?: boolean;
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/** Operating system. Defaults to the native OS. */
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os?: typeof Deno.build.os;
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}
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export type GlobToRegExpOptions = GlobOptions;
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/** Convert a glob string to a regular expressions.
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*
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* // Looking for all the `ts` files:
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* walkSync(".", {
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* match: [globToRegExp("*.ts")]
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* });
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*
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* Looking for all the `.json` files in any subfolder:
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* walkSync(".", {
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* match: [globToRegExp(join("a", "**", "*.json"), {
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* extended: true,
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* globstar: true
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* })]
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* }); */
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export function globToRegExp(
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glob: string,
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{ extended = true, globstar: globstarOption = true, os = NATIVE_OS }:
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GlobToRegExpOptions = {},
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): RegExp {
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const sep = os == "windows" ? `(?:\\\\|\\/)+` : `\\/+`;
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const sepMaybe = os == "windows" ? `(?:\\\\|\\/)*` : `\\/*`;
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const seps = os == "windows" ? ["\\", "/"] : ["/"];
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const sepRaw = os == "windows" ? `\\` : `/`;
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const globstar = os == "windows"
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? `(?:[^\\\\/]*(?:\\\\|\\/|$)+)*`
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: `(?:[^/]*(?:\\/|$)+)*`;
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const wildcard = os == "windows" ? `[^\\\\/]*` : `[^/]*`;
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// Keep track of scope for extended syntaxes.
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const extStack = [];
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// If we are doing extended matching, this boolean is true when we are inside
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// a group (eg {*.html,*.js}), and false otherwise.
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let inGroup = false;
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let inRange = false;
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let regExpString = "";
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// Remove trailing separators.
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let newLength = glob.length;
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for (; newLength > 0 && seps.includes(glob[newLength - 1]); newLength--);
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glob = glob.slice(0, newLength);
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let c, n;
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for (let i = 0; i < glob.length; i++) {
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c = glob[i];
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n = glob[i + 1];
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if (seps.includes(c)) {
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regExpString += sep;
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while (seps.includes(glob[i + 1])) i++;
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continue;
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}
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if (c == "[") {
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if (inRange && n == ":") {
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i++; // skip [
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let value = "";
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while (glob[++i] !== ":") value += glob[i];
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if (value == "alnum") regExpString += "\\w\\d";
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else if (value == "space") regExpString += "\\s";
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else if (value == "digit") regExpString += "\\d";
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i++; // skip last ]
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continue;
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}
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inRange = true;
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regExpString += c;
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continue;
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}
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if (c == "]") {
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inRange = false;
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regExpString += c;
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continue;
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}
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if (c == "!") {
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if (inRange) {
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if (glob[i - 1] == "[") {
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regExpString += "^";
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continue;
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}
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} else if (extended) {
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if (n == "(") {
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extStack.push(c);
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regExpString += "(?!";
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i++;
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continue;
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}
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regExpString += `\\${c}`;
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continue;
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} else {
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regExpString += `\\${c}`;
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continue;
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}
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}
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if (inRange) {
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if (c == "\\" || c == "^" && glob[i - 1] == "[") regExpString += `\\${c}`;
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else regExpString += c;
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continue;
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}
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if (["\\", "$", "^", ".", "="].includes(c)) {
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regExpString += `\\${c}`;
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continue;
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}
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if (c == "(") {
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if (extStack.length) {
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regExpString += `${c}?:`;
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continue;
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}
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regExpString += `\\${c}`;
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continue;
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}
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if (c == ")") {
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if (extStack.length) {
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regExpString += c;
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const type = extStack.pop()!;
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if (type == "@") {
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regExpString += "{1}";
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} else if (type == "!") {
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regExpString += wildcard;
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} else {
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regExpString += type;
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}
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continue;
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}
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regExpString += `\\${c}`;
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continue;
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}
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if (c == "|") {
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if (extStack.length) {
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regExpString += c;
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continue;
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}
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regExpString += `\\${c}`;
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continue;
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}
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if (c == "+") {
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if (n == "(" && extended) {
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extStack.push(c);
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continue;
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}
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regExpString += `\\${c}`;
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continue;
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}
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if (c == "@" && extended) {
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if (n == "(") {
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extStack.push(c);
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continue;
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}
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}
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if (c == "?") {
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if (extended) {
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if (n == "(") {
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extStack.push(c);
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}
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continue;
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} else {
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regExpString += ".";
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continue;
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}
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}
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if (c == "{") {
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inGroup = true;
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regExpString += "(?:";
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continue;
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}
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if (c == "}") {
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inGroup = false;
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regExpString += ")";
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continue;
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}
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if (c == ",") {
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if (inGroup) {
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regExpString += "|";
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continue;
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}
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regExpString += `\\${c}`;
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continue;
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}
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if (c == "*") {
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if (n == "(" && extended) {
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extStack.push(c);
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continue;
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}
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// Move over all consecutive "*"'s.
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// Also store the previous and next characters
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const prevChar = glob[i - 1];
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let starCount = 1;
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while (glob[i + 1] == "*") {
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starCount++;
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i++;
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}
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const nextChar = glob[i + 1];
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const isGlobstar = globstarOption && starCount > 1 &&
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// from the start of the segment
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[sepRaw, "/", undefined].includes(prevChar) &&
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// to the end of the segment
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[sepRaw, "/", undefined].includes(nextChar);
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if (isGlobstar) {
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// it's a globstar, so match zero or more path segments
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regExpString += globstar;
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while (seps.includes(glob[i + 1])) i++;
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} else {
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// it's not a globstar, so only match one path segment
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regExpString += wildcard;
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}
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continue;
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}
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regExpString += c;
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}
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regExpString = `^${regExpString}${regExpString != "" ? sepMaybe : ""}$`;
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return new RegExp(regExpString);
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}
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/** Test whether the given string is a glob */
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export function isGlob(str: string): boolean {
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const chars: Record<string, string> = { "{": "}", "(": ")", "[": "]" };
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/* eslint-disable-next-line max-len */
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const regex =
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/\\(.)|(^!|\*|[\].+)]\?|\[[^\\\]]+\]|\{[^\\}]+\}|\(\?[:!=][^\\)]+\)|\([^|]+\|[^\\)]+\))/;
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if (str === "") {
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return false;
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}
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let match: RegExpExecArray | null;
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while ((match = regex.exec(str))) {
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if (match[2]) return true;
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let idx = match.index + match[0].length;
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// if an open bracket/brace/paren is escaped,
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// set the index to the next closing character
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const open = match[1];
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const close = open ? chars[open] : null;
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if (open && close) {
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const n = str.indexOf(close, idx);
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if (n !== -1) {
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idx = n + 1;
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}
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}
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str = str.slice(idx);
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}
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return false;
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}
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/** Like normalize(), but doesn't collapse "**\/.." when `globstar` is true. */
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export function normalizeGlob(
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glob: string,
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{ globstar = false }: GlobOptions = {},
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): string {
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if (glob.match(/\0/g)) {
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throw new Error(`Glob contains invalid characters: "${glob}"`);
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}
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if (!globstar) {
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return normalize(glob);
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}
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const s = SEP_PATTERN.source;
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const badParentPattern = new RegExp(
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`(?<=(${s}|^)\\*\\*${s})\\.\\.(?=${s}|$)`,
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"g",
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);
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return normalize(glob.replace(badParentPattern, "\0")).replace(/\0/g, "..");
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}
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/** Like join(), but doesn't collapse "**\/.." when `globstar` is true. */
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export function joinGlobs(
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globs: string[],
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{ extended = false, globstar = false }: GlobOptions = {},
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): string {
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if (!globstar || globs.length == 0) {
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return join(...globs);
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}
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if (globs.length === 0) return ".";
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let joined: string | undefined;
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for (const glob of globs) {
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const path = glob;
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if (path.length > 0) {
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if (!joined) joined = path;
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else joined += `${SEP}${path}`;
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}
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}
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if (!joined) return ".";
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return normalizeGlob(joined, { extended, globstar });
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}
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