load.js
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var debug = require('debug')('nodemon');
var fs = require('fs');
var path = require('path');
var exists = fs.exists || path.exists;
var utils = require('../utils');
var rules = require('../rules');
var parse = require('../rules/parse');
var exec = require('./exec');
var defaults = require('./defaults');
module.exports = load;
module.exports.mutateExecOptions = mutateExecOptions;
var existsSync = fs.existsSync || path.existsSync;
function findAppScript() {
// nodemon has been run alone, so try to read the package file
// or try to read the index.js file
if (existsSync('./index.js')) {
return 'index.js';
}
}
/**
* Load the nodemon config, first reading the global root/nodemon.json, then
* the local nodemon.json to the exec and then overwriting using any user
* specified settings (i.e. from the cli)
*
* @param {Object} settings user defined settings
* @param {Function} ready callback that receives complete config
*/
function load(settings, options, config, callback) {
config.loaded = [];
// first load the root nodemon.json
loadFile(options, config, utils.home, function (options) {
// then load the user's local configuration file
if (settings.configFile) {
options.configFile = path.resolve(settings.configFile);
}
loadFile(options, config, process.cwd(), function (options) {
// Then merge over with the user settings (parsed from the cli).
// Note that merge protects and favours existing values over new values,
// and thus command line arguments get priority
options = utils.merge(settings, options);
// legacy support
if (!Array.isArray(options.ignore)) {
options.ignore = [options.ignore];
}
if (!options.ignoreRoot) {
options.ignoreRoot = defaults.ignoreRoot;
}
// blend the user ignore and the default ignore together
if (options.ignoreRoot && options.ignore) {
if (!Array.isArray(options.ignoreRoot)) {
options.ignoreRoot = [options.ignoreRoot];
}
options.ignore = options.ignoreRoot.concat(options.ignore);
} else {
options.ignore = defaults.ignore.concat(options.ignore);
}
// add in any missing defaults
options = utils.merge(options, defaults);
if (!options.script && !options.exec) {
var found = findAppScript();
if (found) {
if (!options.args) {
options.args = [];
}
// if the script is found as a result of not being on the command
// line, then we move any of the pre double-dash args in execArgs
const n = options.scriptPosition || options.args.length;
options.execArgs = (options.execArgs || [])
.concat(options.args.splice(0, n));
options.scriptPosition = null;
options.script = found;
}
}
mutateExecOptions(options);
if (options.quiet) {
utils.quiet();
}
if (options.verbose) {
utils.debug = true;
}
// simplify the ready callback to be called after the rules are normalised
// from strings to regexp through the rules lib. Note that this gets
// created *after* options is overwritten twice in the lines above.
var ready = function (options) {
normaliseRules(options, callback);
};
// if we didn't pick up a nodemon.json file & there's no cli ignores
// then try loading an old style .nodemonignore file
if (config.loaded.length === 0) {
var legacy = loadLegacyIgnore.bind(null, options, config, ready);
// first try .nodemonignore, if that doesn't exist, try nodemon-ignore
return legacy('.nodemonignore', function () {
legacy('nodemon-ignore', function (options) {
ready(options);
});
});
}
ready(options);
});
});
}
/**
* Loads the old style nodemonignore files which is a list of patterns
* in a file to ignore
*
* @param {Object} options nodemon user options
* @param {Function} success
* @param {String} filename ignore file (.nodemonignore or nodemon-ignore)
* @param {Function} fail (optional) failure callback
*/
function loadLegacyIgnore(options, config, success, filename, fail) {
var ignoreFile = path.join(process.cwd(), filename);
exists(ignoreFile, function (exists) {
if (exists) {
config.loaded.push(ignoreFile);
return parse(ignoreFile, function (error, rules) {
options.ignore = rules.raw;
success(options);
});
}
if (fail) {
fail(options);
} else {
success(options);
}
});
}
function normaliseRules(options, ready) {
// convert ignore and watch options to rules/regexp
rules.watch.add(options.watch);
rules.ignore.add(options.ignore);
// normalise the watch and ignore arrays
options.watch = options.watch === false ? false : rules.rules.watch;
options.ignore = rules.rules.ignore;
ready(options);
}
/**
* Looks for a config in the current working directory, and a config in the
* user's home directory, merging the two together, giving priority to local
* config. This can then be overwritten later by command line arguments
*
* @param {Function} ready callback to pass loaded settings to
*/
function loadFile(options, config, dir, ready) {
if (!ready) {
ready = function () { };
}
var callback = function (settings) {
// prefer the local nodemon.json and fill in missing items using
// the global options
ready(utils.merge(settings, options));
};
if (!dir) {
return callback({});
}
var filename = options.configFile || path.join(dir, 'nodemon.json');
if (config.loaded.indexOf(filename) !== -1) {
// don't bother re-parsing the same config file
return callback({});
}
fs.readFile(filename, 'utf8', function (err, data) {
if (err) {
if (err.code === 'ENOENT') {
if (!options.configFile && dir !== utils.home) {
// if no specified local config file and local nodemon.json
// doesn't exist, try the package.json
return loadPackageJSON(config, callback);
}
}
return callback({});
}
var settings = {};
try {
settings = JSON.parse(data.toString('utf8').replace(/^\uFEFF/, ''));
if (!filename.endsWith('package.json') || settings.nodemonConfig) {
config.loaded.push(filename);
}
} catch (e) {
utils.log.fail('Failed to parse config ' + filename);
console.error(e);
process.exit(1);
}
// options values will overwrite settings
callback(settings);
});
}
function loadPackageJSON(config, ready) {
if (!ready) {
ready = () => { };
}
const dir = process.cwd();
const filename = path.join(dir, 'package.json');
const packageLoadOptions = { configFile: filename };
return loadFile(packageLoadOptions, config, dir, settings => {
ready(settings.nodemonConfig || {});
});
}
function mutateExecOptions(options) {
// work out the execOptions based on the final config we have
options.execOptions = exec({
script: options.script,
exec: options.exec,
args: options.args,
scriptPosition: options.scriptPosition,
nodeArgs: options.nodeArgs,
execArgs: options.execArgs,
ext: options.ext,
env: options.env,
}, options.execMap);
// clean up values that we don't need at the top level
delete options.scriptPosition;
delete options.script;
delete options.args;
delete options.ext;
return options;
}