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config-walker.js
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config-walker.js
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const { resolve, join, dirname, relative } = require('path');
const l_ = { transform: require('lodash.transform') };
const CONFIG_JSON = 'config.json';
const DEFAULT_CONFIG = {
vars: {},
questions: [],
partials: {},
templates: {},
};
module.exports = async (configFile, rootPath = __dirname) => {
rootPath = resolve(rootPath);
let path = join(rootPath, configFile);
const configFiles = [path];
do {
path = dirname(path);
configFiles.unshift(join(path, CONFIG_JSON));
} while (relative(rootPath, path) !== '');
return configFiles
.map((c) => {
try {
return require(c);
} catch (e) {
return {};
}
})
.reduce(
(merged, config, i) => {
const dir = dirname(configFiles[i]);
if (config.vars) {
Object.assign(merged.vars, config.vars);
}
if (config.questions) {
merged.questions = merged.questions.concat(config.questions);
}
if (config.partials) {
const partials = l_.transform(
config.partials,
(result, value, key) => { result[key] = join(dir, value); },
{},
);
Object.assign(merged.partials, partials);
}
if (config.templates) {
Object.assign(
merged.templates,
l_.transform(
config.templates,
(result, value, key) => { result[key] = join(dir, value); },
{},
),
);
}
return merged;
},
DEFAULT_CONFIG,
);
};