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- import { balanced } from '@isaacs/balanced-match';
- const escSlash = '\0SLASH' + Math.random() + '\0';
- const escOpen = '\0OPEN' + Math.random() + '\0';
- const escClose = '\0CLOSE' + Math.random() + '\0';
- const escComma = '\0COMMA' + Math.random() + '\0';
- const escPeriod = '\0PERIOD' + Math.random() + '\0';
- const escSlashPattern = new RegExp(escSlash, 'g');
- const escOpenPattern = new RegExp(escOpen, 'g');
- const escClosePattern = new RegExp(escClose, 'g');
- const escCommaPattern = new RegExp(escComma, 'g');
- const escPeriodPattern = new RegExp(escPeriod, 'g');
- const slashPattern = /\\\\/g;
- const openPattern = /\\{/g;
- const closePattern = /\\}/g;
- const commaPattern = /\\,/g;
- const periodPattern = /\\./g;
- function numeric(str) {
- return !isNaN(str) ? parseInt(str, 10) : str.charCodeAt(0);
- }
- function escapeBraces(str) {
- return str
- .replace(slashPattern, escSlash)
- .replace(openPattern, escOpen)
- .replace(closePattern, escClose)
- .replace(commaPattern, escComma)
- .replace(periodPattern, escPeriod);
- }
- function unescapeBraces(str) {
- return str
- .replace(escSlashPattern, '\\')
- .replace(escOpenPattern, '{')
- .replace(escClosePattern, '}')
- .replace(escCommaPattern, ',')
- .replace(escPeriodPattern, '.');
- }
- /**
- * Basically just str.split(","), but handling cases
- * where we have nested braced sections, which should be
- * treated as individual members, like {a,{b,c},d}
- */
- function parseCommaParts(str) {
- if (!str) {
- return [''];
- }
- const parts = [];
- const m = balanced('{', '}', str);
- if (!m) {
- return str.split(',');
- }
- const { pre, body, post } = m;
- const p = pre.split(',');
- p[p.length - 1] += '{' + body + '}';
- const postParts = parseCommaParts(post);
- if (post.length) {
- ;
- p[p.length - 1] += postParts.shift();
- p.push.apply(p, postParts);
- }
- parts.push.apply(parts, p);
- return parts;
- }
- export function expand(str) {
- if (!str) {
- return [];
- }
- // I don't know why Bash 4.3 does this, but it does.
- // Anything starting with {} will have the first two bytes preserved
- // but *only* at the top level, so {},a}b will not expand to anything,
- // but a{},b}c will be expanded to [a}c,abc].
- // One could argue that this is a bug in Bash, but since the goal of
- // this module is to match Bash's rules, we escape a leading {}
- if (str.slice(0, 2) === '{}') {
- str = '\\{\\}' + str.slice(2);
- }
- return expand_(escapeBraces(str), true).map(unescapeBraces);
- }
- function embrace(str) {
- return '{' + str + '}';
- }
- function isPadded(el) {
- return /^-?0\d/.test(el);
- }
- function lte(i, y) {
- return i <= y;
- }
- function gte(i, y) {
- return i >= y;
- }
- function expand_(str, isTop) {
- /** @type {string[]} */
- const expansions = [];
- const m = balanced('{', '}', str);
- if (!m)
- return [str];
- // no need to expand pre, since it is guaranteed to be free of brace-sets
- const pre = m.pre;
- const post = m.post.length ? expand_(m.post, false) : [''];
- if (/\$$/.test(m.pre)) {
- for (let k = 0; k < post.length; k++) {
- const expansion = pre + '{' + m.body + '}' + post[k];
- expansions.push(expansion);
- }
- }
- else {
- const isNumericSequence = /^-?\d+\.\.-?\d+(?:\.\.-?\d+)?$/.test(m.body);
- const isAlphaSequence = /^[a-zA-Z]\.\.[a-zA-Z](?:\.\.-?\d+)?$/.test(m.body);
- const isSequence = isNumericSequence || isAlphaSequence;
- const isOptions = m.body.indexOf(',') >= 0;
- if (!isSequence && !isOptions) {
- // {a},b}
- if (m.post.match(/,(?!,).*\}/)) {
- str = m.pre + '{' + m.body + escClose + m.post;
- return expand_(str);
- }
- return [str];
- }
- let n;
- if (isSequence) {
- n = m.body.split(/\.\./);
- }
- else {
- n = parseCommaParts(m.body);
- if (n.length === 1 && n[0] !== undefined) {
- // x{{a,b}}y ==> x{a}y x{b}y
- n = expand_(n[0], false).map(embrace);
- //XXX is this necessary? Can't seem to hit it in tests.
- /* c8 ignore start */
- if (n.length === 1) {
- return post.map(p => m.pre + n[0] + p);
- }
- /* c8 ignore stop */
- }
- }
- // at this point, n is the parts, and we know it's not a comma set
- // with a single entry.
- let N;
- if (isSequence && n[0] !== undefined && n[1] !== undefined) {
- const x = numeric(n[0]);
- const y = numeric(n[1]);
- const width = Math.max(n[0].length, n[1].length);
- let incr = n.length === 3 && n[2] !== undefined ? Math.abs(numeric(n[2])) : 1;
- let test = lte;
- const reverse = y < x;
- if (reverse) {
- incr *= -1;
- test = gte;
- }
- const pad = n.some(isPadded);
- N = [];
- for (let i = x; test(i, y); i += incr) {
- let c;
- if (isAlphaSequence) {
- c = String.fromCharCode(i);
- if (c === '\\') {
- c = '';
- }
- }
- else {
- c = String(i);
- if (pad) {
- const need = width - c.length;
- if (need > 0) {
- const z = new Array(need + 1).join('0');
- if (i < 0) {
- c = '-' + z + c.slice(1);
- }
- else {
- c = z + c;
- }
- }
- }
- }
- N.push(c);
- }
- }
- else {
- N = [];
- for (let j = 0; j < n.length; j++) {
- N.push.apply(N, expand_(n[j], false));
- }
- }
- for (let j = 0; j < N.length; j++) {
- for (let k = 0; k < post.length; k++) {
- const expansion = pre + N[j] + post[k];
- if (!isTop || isSequence || expansion) {
- expansions.push(expansion);
- }
- }
- }
- }
- return expansions;
- }
- //# sourceMappingURL=index.js.map
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