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