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prevent input source map mutation (#3781)

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fixes #3780
This commit is contained in:
Alex Lam S.L
2020-04-15 10:25:58 +01:00
committed by GitHub
parent c4d28e3b2a
commit 6e9afdc94f
2 changed files with 16 additions and 6 deletions
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16
lib/sourcemap.js
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@@ -103,12 +103,16 @@ function SourceMap(options) {
if (options.orig) Object.keys(options.orig).forEach(function(name) {
var map = options.orig[name];
var indices = [ 0, 0, 1, 0, 0 ];
map.mappings = map.mappings.split(/;/).map(function(line) {
indices[0] = 0;
return line.split(/,/).map(function(segment) {
return indices.slice(0, vlq_decode(indices, segment));
});
});
options.orig[name] = {
names: map.names,
mappings: map.mappings.split(/;/).map(function(line) {
indices[0] = 0;
return line.split(/,/).map(function(segment) {
return indices.slice(0, vlq_decode(indices, segment));
});
}),
sources: map.sources,
};
if (!sources_content || !map.sourcesContent) return;
for (var i = 0; i < map.sources.length; i++) {
var content = map.sourcesContent[i];

6
test/mocha/sourcemaps.js
View File

@@ -277,6 +277,12 @@ describe("sourcemaps", function() {
});
describe("input sourcemaps", function() {
it("Should not modify input source map", function() {
var orig = get_map();
var original = JSON.stringify(orig);
var map = prepare_map(orig);
assert.strictEqual(JSON.stringify(orig), original);
});
it("Should copy over original sourcesContent", function() {
var orig = get_map();
var map = prepare_map(orig);