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'use strict';
const path = require('path');
const Promise = require('bluebird');
const fs = Promise.promisifyAll(require('fs'));
const globby = require('globby');
const debug = require('debug')('purs-loader')
const srcModuleRegex = /(?:^|\n)module\s+([\w\.]+)/i
function match(str) {
const matches = str.match(srcModuleRegex);
return matches && matches[1];
}
module.exports.match = match;
function makeMapEntry(filePurs) {
const dirname = path.dirname(filePurs);
const basename = path.basename(filePurs, '.purs');
const fileJs = path.join(dirname, `${basename}.js`);
const result = Promise.props({
filePurs: fs.readFileAsync(filePurs, 'utf8'),
fileJs: fs.readFileAsync(fileJs, 'utf8').catch(() => undefined)
}).then(fileMap => {
const sourcePurs = fileMap.filePurs;
const sourceJs = fileMap.fileJs;
const moduleName = match(sourcePurs);
const map = {};
map[moduleName] = map[moduleName] || {};
map[moduleName].src = path.resolve(filePurs);
if (sourceJs) {
map[moduleName].ffi = path.resolve(fileJs);
}
return map;
});
return result;
}
module.exports.makeMapEntry = makeMapEntry;
function makeMap(src) {
debug('loading PureScript source and FFI files from %o', src);
const globs = [].concat(src);
return globby(globs).then(paths =>
Promise.all(paths.map(makeMapEntry)).then(result =>
result.reduce(Object.assign, {})
)
);
}
module.exports.makeMap = makeMap;
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