loadRc.js
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//
'use strict';
const yaml = require('js-yaml');
const requireFromString = require('require-from-string');
const readFile = require('./readFile');
const parseJson = require('./parseJson');
const funcRunner = require('./funcRunner');
module.exports = function loadRc(
filepath ,
options
) {
if (!options.sync) {
return readFile(filepath)
.then(parseExtensionlessRcFile)
.then(checkExtensionlessRcResult);
} else {
return checkExtensionlessRcResult(
parseExtensionlessRcFile(readFile.sync(filepath))
);
}
function checkExtensionlessRcResult(result) {
if (result) return result;
if (options.rcExtensions) return loadRcWithExtensions();
return null;
}
function parseExtensionlessRcFile(content ) {
if (!content) return null;
const pasedConfig = options.rcStrictJson
? parseJson(content, filepath)
: yaml.safeLoad(content, { filename: filepath });
return {
config: pasedConfig,
filepath,
};
}
function loadRcWithExtensions() {
let foundConfig = null;
return funcRunner(readRcFile('json'), [
(jsonContent ) => {
// Since this is the first try, config cannot have been found, so don't
// check `if (foundConfig)`.
if (jsonContent) {
const successFilepath = `${filepath}.json`;
foundConfig = {
config: parseJson(jsonContent, successFilepath),
filepath: successFilepath,
};
} else {
return readRcFile('yaml');
}
},
(yamlContent ) => {
if (foundConfig) {
return;
} else if (yamlContent) {
const successFilepath = `${filepath}.yaml`;
foundConfig = {
config: yaml.safeLoad(yamlContent, { filename: successFilepath }),
filepath: successFilepath,
};
} else {
return readRcFile('yml');
}
},
(ymlContent ) => {
if (foundConfig) {
return;
} else if (ymlContent) {
const successFilepath = `${filepath}.yml`;
foundConfig = {
config: yaml.safeLoad(ymlContent, { filename: successFilepath }),
filepath: successFilepath,
};
} else {
return readRcFile('js');
}
},
(jsContent ) => {
if (foundConfig) {
return;
} else if (jsContent) {
const successFilepath = `${filepath}.js`;
foundConfig = {
config: requireFromString(jsContent, successFilepath),
filepath: successFilepath,
};
} else {
return;
}
},
() => foundConfig,
]);
}
function readRcFile(extension ) {
const filepathWithExtension = `${filepath}.${extension}`;
return !options.sync
? readFile(filepathWithExtension)
: readFile.sync(filepathWithExtension);
}
};