1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298 | 1
1
1
1
1
1
1
1
1
50
50
18
18
18
18
1
6
1
9
9
1
12
12
1
11
10
12
12
11
12
1
6
4
3
2
1
28
294
294
294
28
28
28
1
70
70
70
88
88
79
9
5
10
4
4
8
70
1
8
8
8
8
8
8
1
10
10
1
1
1
1
1
28
28
12
16
28
28
1
27
1
14
14
16
16
16
27
27
27
16
14
1
206
206
205
205
184
2208
421
421
92
329
205
205
88
117
1
139
131
131
131
131
4
1
9
9
9
9
9
9
28
28
28
28
28
28
4
4
4
28
1
36
36
1
295
295
295
4
4
295
294
152
142
9
9
9
9
9
9
9
9
1
28
28
1
1
1
1
1
1
1
29
28
28
28
28
| var traverse = require("./traverse");
var astTypes = require("recast").types;
var recast = require("recast");
var path = require("path");
var fs = require("fs");
var _ = require("lodash");
var n = astTypes.namedTypes;
var b = astTypes.builders;
exports.ensureBlock = function (node) {
var block = node.body;
if (block.type === "BlockStatement") return;
Eif (!_.isArray(block)) {
Eif (!n.Statement.check(block)) block = b.returnStatement(block);
block = [block];
}
node.body = b.blockStatement(block);
};
exports.list = function (val) {
return val ? val.split(",") : [];
};
exports.ensureExpressionType = function (node) {
node.type = {
FunctionDeclaration: "FunctionExpression",
ClassDeclaration: "ClassExpression"
}[node.type] || node.type;
return node;
};
exports.getUid = function (parent, file) {
var node;
if (parent.type === "AssignmentExpression") {
node = parent.left;
} else if (parent.type === "VariableDeclarator") {
node = parent.id;
}
var id = "ref";
if (node && node.type === "Identifier") {
id = node.name;
}
return b.identifier(file.generateUid(id));
};
exports.isAbsolute = function (loc) {
if (!loc) return false;
if (loc[0] === "/") return true; // unix
if (loc[1] === ":" && loc[2] === "\\") return true; // windows
return false;
};
exports.removeProperties = function (tree) {
var clear = function (node) {
delete node.tokens;
delete node.range;
delete node.loc;
};
clear(tree);
traverse(tree, clear);
return tree;
};
exports.getIds = function (node) {
var search = [node];
var ids = [];
while (search.length) {
var id = search.shift();
if (id.type === "Identifier") {
ids.push(id.name);
} else if (id.type === "ArrayPattern") {
_.each(id.elements, function (elem) {
search.push(elem);
});
} else Eif (id.type === "ObjectPattern") {
_.each(id.properties, function (prop) {
search.push(prop.value);
});
} else {
throw new Error("unknown node " + id.type);
}
}
return ids;
};
exports.errorWithNode = function (node, msg) {
var line = node.loc.start.line;
var col = node.loc.start.column;
var err = new SyntaxError("Line " + line + ": " + msg);
err.lineNumber = line;
err.column = col;
return err;
};
exports.canCompile = function (filename) {
var ext = path.extname(filename);
return _.contains([".js", ".es6", ".jsx"], ext);
};
exports.sourceMapToComment = function (map) {
var json = JSON.stringify(map);
var base64 = new Buffer(json).toString("base64");
return "//# sourceMappingURL=data:application/json;base64," + base64;
};
exports.pushMutatorMap = function (mutatorMap, key, kind, method) {
var map;
if (_.has(mutatorMap, key)) {
map = mutatorMap[key];
} else {
map = {};
}
mutatorMap[key] = map;
if (map[kind]) {
throw new Error("a " + kind + " already exists for this property");
} else {
map[kind] = method;
}
};
exports.buildDefineProperties = function (mutatorMap, keyNode) {
var objExpr = b.objectExpression([]);
_.each(mutatorMap, function (map, key) {
var mapNode = b.objectExpression([]);
var propNode = b.property("init", b.identifier(key), mapNode);
_.each(map, function (node, key) {
node = _.clone(node);
if (node.type === "MethodDefinition") node = node.value;
mapNode.properties.push(b.property("init", b.identifier(key), node));
});
objExpr.properties.push(propNode);
});
return exports.template("object-define-properties", {
OBJECT: keyNode,
PROPS: objExpr
}, true);
};
exports.template = function (name, nodes, keepExpression) {
var template = exports.templates[name];
if (!template) throw new ReferenceError("unknown template " + name);
template = _.cloneDeep(template);
if (!_.isEmpty(nodes)) {
traverse(template, function (node) {
if (node.type === "Identifier" && _.has(nodes, node.name)) {
var newNode = nodes[node.name];
if (_.isString(newNode)) {
node.name = newNode;
} else {
return newNode;
}
}
});
}
var node = template.body[0];
if (!keepExpression && node.type === "ExpressionStatement") {
return node.expression;
} else {
return node;
}
};
exports.isReferenced = function (node, parent) {
// we're a property key
if (parent.type === "Property" && parent.key === node) return false;
var isMemberExpression = parent.type === "MemberExpression";
// we're in a member expression and we're the computed property so we're referenced
var isComputedProperty = isMemberExpression && parent.property === node && parent.computed;
// we're in a member expression and we're the object so we're referenced
var isObject = isMemberExpression && parent.object === node;
// we are referenced
if (!isMemberExpression || isComputedProperty || isObject) return true;
return false;
};
exports.codeFrame = function (lines, lineNumber, colNumber) {
colNumber = Math.max(colNumber, 0);
lines = lines.split("\n");
var start = Math.max(lineNumber - 3, 0);
var end = Math.min(lines.length, lineNumber + 3);
var width = (end + "").length;
return "\n" + lines.slice(start, end).map(function (line, i) {
var curr = i + start + 1;
var gutter = curr === lineNumber ? "> " : " ";
var sep = curr + exports.repeat(width + 1);
gutter += sep + "| ";
var str = gutter + line;
if (colNumber && curr === lineNumber) {
str += "\n";
str += exports.repeat(gutter.length - 2);
str += "|" + exports.repeat(colNumber) + "^";
}
return str;
}).join("\n");
};
exports.repeat = function (width, cha) {
cha = cha || " ";
return new Array(width + 1).join(cha);
};
exports.parse = function (opts, code, callback) {
try {
var recastOpts = {};
if (opts.sourceMap) {
recastOpts.sourceFileName = opts.sourceFileName;
recastOpts.sourceRoot = opts.sourceRoot;
}
var ast = recast.parse(code, recastOpts);
if (callback) {
return callback(ast);
} else {
return ast;
}
} catch (err) {
Eif (!err._6to5) {
err._6to5 = true;
err.message = opts.filename + ": " + err.message;
Eif (err.lineNumber) {
var frame = exports.codeFrame(code, err.lineNumber, err.column);
var err2 = new SyntaxError(err.message + frame);
err2._6to5 = true;
throw err2;
}
}
throw err;
}
};
exports.parseNoProperties = function (loc, code) {
var ast = exports.parse({ filename: loc }, code).program;
return exports.removeProperties(ast);
};
try {
exports.templates = require("../../templates.json");
} catch (err) {
Iif (err.code !== "MODULE_NOT_FOUND") throw err;
exports.templates = {};
var templatesLoc = __dirname + "/templates";
Iif (!fs.existsSync(templatesLoc)) {
throw new Error("no templates directory - this is most likely the result" +
" of a broken `npm publish`. Please report to " +
"https://github.com/sebmck/6to5/issues");
}
_.each(fs.readdirSync(templatesLoc), function (name) {
if (name[0] === ".") return;
var key = path.basename(name, path.extname(name));
var loc = templatesLoc + "/" + name;
var code = fs.readFileSync(loc, "utf8");
exports.templates[key] = exports.parseNoProperties(loc, code);
});
}
|