/
RulesetLoader.js
76 lines (71 loc) · 1.79 KB
/
RulesetLoader.js
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var _ = require('lodash')
var fs = require('fs')
var util = require('util')
var path = require('path')
var mkdirp = require('mkdirp')
var compiler = require('krl-compiler')
var versionKey = [
require('pico-engine-core/package.json').version,
require('krl-compiler/package.json').version
].join('-')
var fsExist = function (filePath, callback) {
fs.stat(filePath, function (err, stats) {
if (err) {
if (err.code === 'ENOENT') {
return callback(null, false)
} else {
return callback(err)
}
}
callback(null, true)
})
}
var storeFile = function (filePath, src, callback) {
mkdirp(path.dirname(filePath), function (err) {
if (err) return callback(err)
fs.writeFile(filePath, src, {
encoding: 'utf8'
}, callback)
})
}
module.exports = function (conf) {
var rulesetsDir = conf.rulesets_dir
var onWarning = conf.onWarning || _.noop
return util.promisify(function (rsInfo, callback) {
var hash = rsInfo.hash
var krlSrc = rsInfo.src
var file = path.resolve(
rulesetsDir,
versionKey,
hash.substr(0, 2),
hash.substr(2, 2),
hash + '.js'
)
fsExist(file, function (err, doesExist) {
if (err) return callback(err)
if (doesExist) {
callback(null, require(file))
return
}
var out
try {
out = compiler(krlSrc, {
parser_options: {
filename: rsInfo.filename
},
inline_source_map: true
})
} catch (err) {
return callback(err)
}
storeFile(file, out.code, function (err) {
if (err) return callback(err)
var rs = require(file)
_.each(out.warnings, function (warning) {
onWarning(rs.rid, warning)
})
callback(null, rs)
})
})
})
}