v6

node_modules/braces/lib/compilers.js

@@ -0,0 +1,282 @@
+'use strict';
+
+var utils = require('./utils');
+
+module.exports = function(braces, options) {
+  braces.compiler
+
+    /**
+     * bos
+     */
+
+    .set('bos', function() {
+      if (this.output) return;
+      this.ast.queue = isEscaped(this.ast) ? [this.ast.val] : [];
+      this.ast.count = 1;
+    })
+
+    /**
+     * Square brackets
+     */
+
+    .set('bracket', function(node) {
+      var close = node.close;
+      var open = !node.escaped ? '[' : '\\[';
+      var negated = node.negated;
+      var inner = node.inner;
+
+      inner = inner.replace(/\\(?=[\\\w]|$)/g, '\\\\');
+      if (inner === ']-') {
+        inner = '\\]\\-';
+      }
+
+      if (negated && inner.indexOf('.') === -1) {
+        inner += '.';
+      }
+      if (negated && inner.indexOf('/') === -1) {
+        inner += '/';
+      }
+
+      var val = open + negated + inner + close;
+      var queue = node.parent.queue;
+      var last = utils.arrayify(queue.pop());
+
+      queue.push(utils.join(last, val));
+      queue.push.apply(queue, []);
+    })
+
+    /**
+     * Brace
+     */
+
+    .set('brace', function(node) {
+      node.queue = isEscaped(node) ? [node.val] : [];
+      node.count = 1;
+      return this.mapVisit(node.nodes);
+    })
+
+    /**
+     * Open
+     */
+
+    .set('brace.open', function(node) {
+      node.parent.open = node.val;
+    })
+
+    /**
+     * Inner
+     */
+
+    .set('text', function(node) {
+      var queue = node.parent.queue;
+      var escaped = node.escaped;
+      var segs = [node.val];
+
+      if (node.optimize === false) {
+        options = utils.extend({}, options, {optimize: false});
+      }
+
+      if (node.multiplier > 1) {
+        node.parent.count *= node.multiplier;
+      }
+
+      if (options.quantifiers === true && utils.isQuantifier(node.val)) {
+        escaped = true;
+
+      } else if (node.val.length > 1) {
+        if (isType(node.parent, 'brace') && !isEscaped(node)) {
+          var expanded = utils.expand(node.val, options);
+          segs = expanded.segs;
+
+          if (expanded.isOptimized) {
+            node.parent.isOptimized = true;
+          }
+
+          // if nothing was expanded, we probably have a literal brace
+          if (!segs.length) {
+            var val = (expanded.val || node.val);
+            if (options.unescape !== false) {
+              // unescape unexpanded brace sequence/set separators
+              val = val.replace(/\\([,.])/g, '$1');
+              // strip quotes
+              val = val.replace(/["'`]/g, '');
+            }
+
+            segs = [val];
+            escaped = true;
+          }
+        }
+
+      } else if (node.val === ',') {
+        if (options.expand) {
+          node.parent.queue.push(['']);
+          segs = [''];
+        } else {
+          segs = ['|'];
+        }
+      } else {
+        escaped = true;
+      }
+
+      if (escaped && isType(node.parent, 'brace')) {
+        if (node.parent.nodes.length <= 4 && node.parent.count === 1) {
+          node.parent.escaped = true;
+        } else if (node.parent.length <= 3) {
+          node.parent.escaped = true;
+        }
+      }
+
+      if (!hasQueue(node.parent)) {
+        node.parent.queue = segs;
+        return;
+      }
+
+      var last = utils.arrayify(queue.pop());
+      if (node.parent.count > 1 && options.expand) {
+        last = multiply(last, node.parent.count);
+        node.parent.count = 1;
+      }
+
+      queue.push(utils.join(utils.flatten(last), segs.shift()));
+      queue.push.apply(queue, segs);
+    })
+
+    /**
+     * Close
+     */
+
+    .set('brace.close', function(node) {
+      var queue = node.parent.queue;
+      var prev = node.parent.parent;
+      var last = prev.queue.pop();
+      var open = node.parent.open;
+      var close = node.val;
+
+      if (open && close && isOptimized(node, options)) {
+        open = '(';
+        close = ')';
+      }
+
+      // if a close brace exists, and the previous segment is one character
+      // don't wrap the result in braces or parens
+      var ele = utils.last(queue);
+      if (node.parent.count > 1 && options.expand) {
+        ele = multiply(queue.pop(), node.parent.count);
+        node.parent.count = 1;
+        queue.push(ele);
+      }
+
+      if (close && typeof ele === 'string' && ele.length === 1) {
+        open = '';
+        close = '';
+      }
+
+      if ((isLiteralBrace(node, options) || noInner(node)) && !node.parent.hasEmpty) {
+        queue.push(utils.join(open, queue.pop() || ''));
+        queue = utils.flatten(utils.join(queue, close));
+      }
+
+      if (typeof last === 'undefined') {
+        prev.queue = [queue];
+      } else {
+        prev.queue.push(utils.flatten(utils.join(last, queue)));
+      }
+    })
+
+    /**
+     * eos
+     */
+
+    .set('eos', function(node) {
+      if (this.input) return;
+
+      if (options.optimize !== false) {
+        this.output = utils.last(utils.flatten(this.ast.queue));
+      } else if (Array.isArray(utils.last(this.ast.queue))) {
+        this.output = utils.flatten(this.ast.queue.pop());
+      } else {
+        this.output = utils.flatten(this.ast.queue);
+      }
+
+      if (node.parent.count > 1 && options.expand) {
+        this.output = multiply(this.output, node.parent.count);
+      }
+
+      this.output = utils.arrayify(this.output);
+      this.ast.queue = [];
+    });
+
+};
+
+/**
+ * Multiply the segments in the current brace level
+ */
+
+function multiply(queue, n, options) {
+  return utils.flatten(utils.repeat(utils.arrayify(queue), n));
+}
+
+/**
+ * Return true if `node` is escaped
+ */
+
+function isEscaped(node) {
+  return node.escaped === true;
+}
+
+/**
+ * Returns true if regex parens should be used for sets. If the parent `type`
+ * is not `brace`, then we're on a root node, which means we should never
+ * expand segments and open/close braces should be `{}` (since this indicates
+ * a brace is missing from the set)
+ */
+
+function isOptimized(node, options) {
+  if (node.parent.isOptimized) return true;
+  return isType(node.parent, 'brace')
+    && !isEscaped(node.parent)
+    && options.expand !== true;
+}
+
+/**
+ * Returns true if the value in `node` should be wrapped in a literal brace.
+ * @return {Boolean}
+ */
+
+function isLiteralBrace(node, options) {
+  return isEscaped(node.parent) || options.optimize !== false;
+}
+
+/**
+ * Returns true if the given `node` does not have an inner value.
+ * @return {Boolean}
+ */
+
+function noInner(node, type) {
+  if (node.parent.queue.length === 1) {
+    return true;
+  }
+  var nodes = node.parent.nodes;
+  return nodes.length === 3
+    && isType(nodes[0], 'brace.open')
+    && !isType(nodes[1], 'text')
+    && isType(nodes[2], 'brace.close');
+}
+
+/**
+ * Returns true if the given `node` is the given `type`
+ * @return {Boolean}
+ */
+
+function isType(node, type) {
+  return typeof node !== 'undefined' && node.type === type;
+}
+
+/**
+ * Returns true if the given `node` has a non-empty queue.
+ * @return {Boolean}
+ */
+
+function hasQueue(node) {
+  return Array.isArray(node.queue) && node.queue.length;
+}