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qwen/nodejs/node_modules/nodemon/lib/rules/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} rule 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);
+  }
+}