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'use strict';
const fs = require('fs');
const path = require('path');
const fastGlob = require('fast-glob');
const gitIgnore = require('ignore');
const pify = require('pify');
const slash = require('slash');
const DEFAULT_IGNORE = [
'**/node_modules/**',
'**/bower_components/**',
'**/flow-typed/**',
'**/coverage/**',
'**/.git'
];
const readFileP = pify(fs.readFile);
const mapGitIgnorePatternTo = base => ignore => {
if (ignore.startsWith('!')) {
return '!' + path.posix.join(base, ignore.substr(1));
}
return path.posix.join(base, ignore);
};
const parseGitIgnore = (content, opts) => {
const base = slash(path.relative(opts.cwd, path.dirname(opts.fileName)));
return content
.split(/\r?\n/)
.filter(Boolean)
.filter(l => l.charAt(0) !== '#')
.map(mapGitIgnorePatternTo(base));
};
const reduceIgnore = files => {
return files.reduce((ignores, file) => {
ignores.add(parseGitIgnore(file.content, {
cwd: file.cwd,
fileName: file.filePath
}));
return ignores;
}, gitIgnore());
};
const getIsIgnoredPredecate = (ignores, cwd) => {
return p => ignores.ignores(slash(path.relative(cwd, p)));
};
const getFile = (file, cwd) => {
const filePath = path.join(cwd, file);
return readFileP(filePath, 'utf8')
.then(content => ({
content,
cwd,
filePath
}));
};
const getFileSync = (file, cwd) => {
const filePath = path.join(cwd, file);
const content = fs.readFileSync(filePath, 'utf8');
return {
content,
cwd,
filePath
};
};
const normalizeOpts = opts => {
opts = opts || {};
const ignore = opts.ignore || [];
const cwd = opts.cwd || process.cwd();
return {ignore, cwd};
};
module.exports = o => {
const opts = normalizeOpts(o);
return fastGlob('**/.gitignore', {ignore: DEFAULT_IGNORE.concat(opts.ignore), cwd: opts.cwd})
.then(paths => Promise.all(paths.map(file => getFile(file, opts.cwd))))
.then(files => reduceIgnore(files))
.then(ignores => getIsIgnoredPredecate(ignores, opts.cwd));
};
module.exports.sync = o => {
const opts = normalizeOpts(o);
const paths = fastGlob.sync('**/.gitignore', {ignore: DEFAULT_IGNORE.concat(opts.ignore), cwd: opts.cwd});
const files = paths.map(file => getFileSync(file, opts.cwd));
const ignores = reduceIgnore(files);
return getIsIgnoredPredecate(ignores, opts.cwd);
};
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