mirror of
https://github.com/cachix/install-nix-action.git
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104 lines
2.4 KiB
JavaScript
104 lines
2.4 KiB
JavaScript
'use strict';
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var extend = require('extend-shallow');
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var Snapdragon = require('snapdragon');
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var compilers = require('./compilers');
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var parsers = require('./parsers');
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var utils = require('./utils');
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/**
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* Customize Snapdragon parser and renderer
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*/
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function Braces(options) {
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this.options = extend({}, options);
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}
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/**
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* Initialize braces
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*/
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Braces.prototype.init = function(options) {
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if (this.isInitialized) return;
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this.isInitialized = true;
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var opts = utils.createOptions({}, this.options, options);
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this.snapdragon = this.options.snapdragon || new Snapdragon(opts);
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this.compiler = this.snapdragon.compiler;
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this.parser = this.snapdragon.parser;
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compilers(this.snapdragon, opts);
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parsers(this.snapdragon, opts);
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/**
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* Call Snapdragon `.parse` method. When AST is returned, we check to
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* see if any unclosed braces are left on the stack and, if so, we iterate
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* over the stack and correct the AST so that compilers are called in the correct
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* order and unbalance braces are properly escaped.
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*/
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utils.define(this.snapdragon, 'parse', function(pattern, options) {
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var parsed = Snapdragon.prototype.parse.apply(this, arguments);
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this.parser.ast.input = pattern;
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var stack = this.parser.stack;
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while (stack.length) {
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addParent({type: 'brace.close', val: ''}, stack.pop());
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}
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function addParent(node, parent) {
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utils.define(node, 'parent', parent);
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parent.nodes.push(node);
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}
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// add non-enumerable parser reference
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utils.define(parsed, 'parser', this.parser);
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return parsed;
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});
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};
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/**
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* Decorate `.parse` method
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*/
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Braces.prototype.parse = function(ast, options) {
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if (ast && typeof ast === 'object' && ast.nodes) return ast;
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this.init(options);
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return this.snapdragon.parse(ast, options);
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};
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/**
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* Decorate `.compile` method
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*/
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Braces.prototype.compile = function(ast, options) {
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if (typeof ast === 'string') {
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ast = this.parse(ast, options);
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} else {
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this.init(options);
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}
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return this.snapdragon.compile(ast, options);
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};
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/**
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* Expand
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*/
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Braces.prototype.expand = function(pattern) {
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var ast = this.parse(pattern, {expand: true});
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return this.compile(ast, {expand: true});
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};
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/**
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* Optimize
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*/
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Braces.prototype.optimize = function(pattern) {
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var ast = this.parse(pattern, {optimize: true});
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return this.compile(ast, {optimize: true});
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};
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/**
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* Expose `Braces`
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*/
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module.exports = Braces;
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