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