'use strict';
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const {promisify} = require('util');
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const fs = require('fs');
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const path = require('path');
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const fastGlob = require('fast-glob');
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const gitIgnore = require('ignore');
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const slash = require('slash');
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const DEFAULT_IGNORE = [
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'**/node_modules/**',
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'**/flow-typed/**',
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'**/coverage/**',
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'**/.git'
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];
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const readFileP = promisify(fs.readFile);
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const mapGitIgnorePatternTo = base => ignore => {
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if (ignore.startsWith('!')) {
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return '!' + path.posix.join(base, ignore.slice(1));
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}
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return path.posix.join(base, ignore);
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};
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const parseGitIgnore = (content, options) => {
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const base = slash(path.relative(options.cwd, path.dirname(options.fileName)));
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return content
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.split(/\r?\n/)
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.filter(Boolean)
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.filter(line => !line.startsWith('#'))
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.map(mapGitIgnorePatternTo(base));
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};
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const reduceIgnore = files => {
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const ignores = gitIgnore();
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for (const file of files) {
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ignores.add(parseGitIgnore(file.content, {
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cwd: file.cwd,
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fileName: file.filePath
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}));
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}
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return ignores;
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};
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const ensureAbsolutePathForCwd = (cwd, p) => {
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cwd = slash(cwd);
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if (path.isAbsolute(p)) {
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if (slash(p).startsWith(cwd)) {
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return p;
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}
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throw new Error(`Path ${p} is not in cwd ${cwd}`);
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}
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return path.join(cwd, p);
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};
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const getIsIgnoredPredecate = (ignores, cwd) => {
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return p => ignores.ignores(slash(path.relative(cwd, ensureAbsolutePathForCwd(cwd, p.path || p))));
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};
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const getFile = async (file, cwd) => {
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const filePath = path.join(cwd, file);
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const content = await readFileP(filePath, 'utf8');
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return {
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cwd,
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filePath,
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content
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};
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};
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const getFileSync = (file, cwd) => {
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const filePath = path.join(cwd, file);
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const content = fs.readFileSync(filePath, 'utf8');
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return {
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cwd,
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filePath,
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content
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};
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};
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const normalizeOptions = ({
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ignore = [],
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cwd = slash(process.cwd())
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} = {}) => {
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return {ignore, cwd};
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};
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module.exports = async options => {
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options = normalizeOptions(options);
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const paths = await fastGlob('**/.gitignore', {
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ignore: DEFAULT_IGNORE.concat(options.ignore),
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cwd: options.cwd
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});
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const files = await Promise.all(paths.map(file => getFile(file, options.cwd)));
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const ignores = reduceIgnore(files);
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return getIsIgnoredPredecate(ignores, options.cwd);
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};
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module.exports.sync = options => {
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options = normalizeOptions(options);
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const paths = fastGlob.sync('**/.gitignore', {
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ignore: DEFAULT_IGNORE.concat(options.ignore),
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cwd: options.cwd
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});
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const files = paths.map(file => getFileSync(file, options.cwd));
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const ignores = reduceIgnore(files);
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return getIsIgnoredPredecate(ignores, options.cwd);
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};
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