add.js
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'use strict';
var utils = require('../utils');
// internal
var reEscComments = /\\#/g;
// note that '^^' is used in place of escaped comments
var reUnescapeComments = /\^\^/g;
var reComments = /#.*$/;
var reEscapeChars = /[.|\-[\]()\\]/g;
var reAsterisk = /\*/g;
module.exports = add;
/**
* Converts file patterns or regular expressions to nodemon
* compatible RegExp matching rules. Note: the `rules` argument
* object is modified to include the new rule and new RegExp
*
* ### Example:
*
* var rules = { watch: [], ignore: [] };
* add(rules, 'watch', '*.js');
* add(rules, 'ignore', '/public/');
* add(rules, 'watch', ':(\d)*\.js'); // note: string based regexp
* add(rules, 'watch', /\d*\.js/);
*
* @param {Object} rules containing `watch` and `ignore`. Also updated during
* execution
* @param {String} which must be either "watch" or "ignore"
* @param {String|RegExp} the actual rule.
*/
function add(rules, which, rule) {
if (!{ ignore: 1, watch: 1}[which]) {
throw new Error('rules/index.js#add requires "ignore" or "watch" as the ' +
'first argument');
}
if (Array.isArray(rule)) {
rule.forEach(function (rule) {
add(rules, which, rule);
});
return;
}
// support the rule being a RegExp, but reformat it to
// the custom :<regexp> format that we're working with.
if (rule instanceof RegExp) {
// rule = ':' + rule.toString().replace(/^\/(.*?)\/$/g, '$1');
utils.log.error('RegExp format no longer supported, but globs are.');
return;
}
// remove comments and trim lines
// this mess of replace methods is escaping "\#" to allow for emacs temp files
// first up strip comments and remove blank head or tails
rule = (rule || '').replace(reEscComments, '^^')
.replace(reComments, '')
.replace(reUnescapeComments, '#').trim();
var regexp = false;
if (typeof rule === 'string' && rule.substring(0, 1) === ':') {
rule = rule.substring(1);
utils.log.error('RegExp no longer supported: ' + rule);
regexp = true;
} else if (rule.length === 0) {
// blank line (or it was a comment)
return;
}
if (regexp) {
// rules[which].push(rule);
} else {
// rule = rule.replace(reEscapeChars, '\\$&')
// .replace(reAsterisk, '.*');
rules[which].push(rule);
// compile a regexp of all the rules for this ignore or watch
var re = rules[which].map(function (rule) {
return rule.replace(reEscapeChars, '\\$&')
.replace(reAsterisk, '.*');
}).join('|');
// used for the directory matching
rules[which].re = new RegExp(re);
}
}