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
|
var acorn = require("acorn"),
jsesc = require("jsesc"),
walk = require("estree-walker").walk,
MagicString = require("magic-string"),
createFilter = require("rollup-pluginutils").createFilter,
extname = require("path").extname;
module.exports = function(options) {
if (options == null) options = {};
var filter = createFilter(options.include, options.exclude),
map = options.sourceMap !== false;
return {
transform: function(code, id) {
if (!filter(id) || extname(id) !== ".js") return;
var ast, magic = new MagicString(code), modified;
try {
ast = acorn.parse(code, {ecmaVersion: 6, sourceType: "module"});
} catch (error) {
error.message += " in " + id;
throw error;
}
walk(ast, {
enter: function(node, parent) {
if (map) {
magic.addSourcemapLocation(node.start);
magic.addSourcemapLocation(node.end);
}
if (node.type === "Literal" && typeof node.value === "string") {
var raw0 = node.raw,
raw1 = jsesc(node.value, {wrap: true, quotes: raw0[0] === "'" ? "single" : "double"});
if (raw0 !== raw1) {
modified = true;
magic.overwrite(node.start, node.end, raw1);
}
}
}
});
return modified && {
code: magic.toString(),
map: map && magic.generateMap()
};
}
};
};
|
