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fix(sourcemaps): Handle null mappings properly (#2149)
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@DeMoorJasper @wbinnssmith
DeMoorJasper authored and wbinnssmith committed Mar 13, 2019
1 parent adf5742 commit f97eb4a
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Showing 3 changed files with 235 additions and 33 deletions.
43 changes: 23 additions & 20 deletions packages/core/parcel-bundler/src/SourceMap.js
View file
Expand Up @@ -10,20 +10,20 @@ class SourceMap {

purifyMappings(mappings) {
if (Array.isArray(mappings)) {
return mappings.filter(mapping => {
return (
return mappings.filter(
mapping =>
mapping &&
mapping.source &&
mapping.original &&
typeof mapping.original.line === 'number' &&
mapping.original.line > 0 &&
typeof mapping.original.column === 'number' &&
(typeof mapping.original === 'object' &&
(mapping.original === null ||
(typeof mapping.original.line === 'number' &&
mapping.original.line > 0 &&
typeof mapping.original.column === 'number' &&
mapping.source))) &&
mapping.generated &&
typeof mapping.generated.line === 'number' &&
mapping.generated.line > 0 &&
typeof mapping.generated.column === 'number'
);
});
);
}

return [];
Expand All @@ -34,12 +34,14 @@ class SourceMap {
return map;
}
map = typeof map === 'string' ? JSON.parse(map) : map;
if (map.sourceRoot) delete map.sourceRoot;
return await new SourceMapConsumer(map);
}

async addMap(map, lineOffset = 0, columnOffset = 0) {
if (!(map instanceof SourceMap) && map.version) {
if (typeof map === 'string' || (typeof map === 'object' && map.version)) {
let consumer = await this.getConsumer(map);
if (!consumer) return this;

consumer.eachMapping(mapping => {
this.addConsumerMapping(mapping, lineOffset, columnOffset);
Expand All @@ -55,7 +57,7 @@ class SourceMap {
// Only needs to happen in source-map 0.7
consumer.destroy();
}
} else {
} else if (map.mappings && map.sources) {
if (!map.eachMapping) {
map = new SourceMap(map.mappings, map.sources);
}
Expand Down Expand Up @@ -91,21 +93,22 @@ class SourceMap {
}

addConsumerMapping(mapping, lineOffset = 0, columnOffset = 0) {
let original = null;
if (
!mapping.source ||
!mapping.originalLine ||
(!mapping.originalColumn && mapping.originalColumn !== 0)
typeof mapping.originalLine === 'number' &&
mapping.originalLine > 0 &&
typeof mapping.originalColumn === 'number'
) {
return;
original = {
line: mapping.originalLine,
column: mapping.originalColumn
};
}

this.mappings.push({
source: mapping.source,
source: original ? mapping.source : null,
name: mapping.name,
original: {
line: mapping.originalLine,
column: mapping.originalColumn
},
original,
generated: {
line: mapping.generatedLine + lineOffset,
column: mapping.generatedColumn + columnOffset
Expand Down
199 changes: 199 additions & 0 deletions packages/core/parcel-bundler/test/sourcemaps.js
View file
@@ -0,0 +1,199 @@
const assert = require('assert');
const fs = require('@parcel/fs');
const SourceMap = require('../src/SourceMap');

describe('sourcemaps', function() {
it('should purify mappings properly', async function() {
let mappings = [
{
source: 'index.js',
name: 'A',
original: {
line: 0,
column: 0
},
generated: {
line: 0,
column: 0
}
},
{
generated: {
line: 1,
column: 0
},
original: null,
source: null,
name: null
},
{
generated: {
line: 1,
column: 0
},
original: null,
source: null,
name: null
},
{
generated: {
line: 1,
column: 0
},
original: {
line: 0,
column: 0
},
source: null,
name: null
},
{
generated: {
line: 1,
column: 0
},
original: {
line: 1,
column: 0
},
source: null,
name: null
},
{
generated: {
line: 1,
column: 0
},
original: {
line: 1,
column: 0
},
source: 'index.js',
name: null
},
{
generated: {
line: 1,
column: 0
},
original: {
line: 0,
column: 0
},
source: 'index.js',
name: null
},
{
source: 'index.js',
name: 'A',
original: {
line: 1,
column: 18
},
generated: {
line: 4,
column: 187
}
}
];

let expectedResult = [
{
generated: {
line: 1,
column: 0
},
original: null,
source: null,
name: null
},
{
generated: {
line: 1,
column: 0
},
original: null,
source: null,
name: null
},
{
generated: {
line: 1,
column: 0
},
original: {
line: 1,
column: 0
},
source: 'index.js',
name: null
},
{
source: 'index.js',
name: 'A',
original: {
line: 1,
column: 18
},
generated: {
line: 4,
column: 187
}
}
];

let sourcemap = new SourceMap(mappings, {});
assert.deepEqual(sourcemap.mappings, expectedResult);
});

it('should be able to handle null mappings properly', async function() {
let mappings = [
{
generated: {
line: 1,
column: 0
},
original: {
line: 1,
column: 0
},
source: 'input.js',
name: 'console'
},
{
generated: {
line: 1,
column: 7
},
original: null,
source: null,
name: null
}
];

let sources = {
'input.js': 'console.log("hello world!");'
};

let sourcemap = new SourceMap(mappings, sources);
assert.equal(sourcemap.mappings.length, 2);
assert.deepEqual(sourcemap.mappings, mappings);

let mapString = sourcemap.stringify('index.map', '/');
let combinedSourcemap = new SourceMap(mappings, sources);
await combinedSourcemap.addMap(mapString);

let newMapString = combinedSourcemap.stringify('index.map', '/');
assert.equal(mapString, newMapString);

let newSourcemap = new SourceMap([], {});
await newSourcemap.addMap(sourcemap);

assert.deepEqual(newSourcemap.mappings, mappings);

newSourcemap = new SourceMap([], {});
await newSourcemap.addMap(mapString);

assert.deepEqual(newSourcemap.mappings, mappings);
});
});
26 changes: 13 additions & 13 deletions yarn.lock
View file
Expand Up @@ -1956,12 +1956,7 @@ acorn@^4.0.4, acorn@~4.0.2:
resolved "https://registry.yarnpkg.com/acorn/-/acorn-4.0.13.tgz#105495ae5361d697bd195c825192e1ad7f253787"
integrity sha1-EFSVrlNh1pe9GVyCUZLhrX8lN4c=

acorn@^5.0.0:
version "5.5.3"
resolved "https://registry.yarnpkg.com/acorn/-/acorn-5.5.3.tgz#f473dd47e0277a08e28e9bec5aeeb04751f0b8c9"
integrity sha512-jd5MkIUlbbmb07nXH0DT3y7rDVtkzDi4XZOUVWAer8ajmF/DTSSbl5oNFyDOl/OXA33Bl79+ypHhl2pN20VeOQ==

acorn@^5.5.0:
acorn@^5.0.0, acorn@^5.5.0:
version "5.7.3"
resolved "https://registry.yarnpkg.com/acorn/-/acorn-5.7.3.tgz#67aa231bf8812974b85235a96771eb6bd07ea279"
integrity sha512-T/zvzYRfbVojPWahDsE5evJdHb3oJoQfFbsrKM7w5Zcs++Tr257tia3BmMP8XYVjp1S9RZXQMh7gao96BlqZOw==
Expand Down Expand Up @@ -3222,9 +3217,9 @@ caniuse-api@^3.0.0:
lodash.uniq "^4.5.0"

caniuse-db@^1.0.30000529, caniuse-db@^1.0.30000634, caniuse-db@^1.0.30000639:
version "1.0.30000899"
resolved "https://registry.yarnpkg.com/caniuse-db/-/caniuse-db-1.0.30000899.tgz#f66d667d507c2aa19603a4a3763d71aa89cc360f"
integrity sha512-MSCUohyoLU4/PGapapw/PLQkmQ+sFgzX6e3tM6ue8HX9HW9rBD5gRiAYKhC8r0QkvUE0pWTA8Ze6f3jrzBizVg==
version "1.0.30000946"
resolved "https://registry.yarnpkg.com/caniuse-db/-/caniuse-db-1.0.30000946.tgz#c8fd9a53ccd23e26d87b6e22a4bdf257b7aff36c"
integrity sha512-qjpdekHW9uyy1U/VxuoR9ppn8HjoBxsR5dRTpumUeoYgL8IWUeos+QpJh9DaDdjaKitkNzgAFMXCZLDYKWWyEQ==

caniuse-lite@^1.0.0, caniuse-lite@^1.0.30000844, caniuse-lite@^1.0.30000898:
version "1.0.30000899"
Expand Down Expand Up @@ -4602,7 +4597,12 @@ ee-first@1.1.1:
resolved "https://registry.yarnpkg.com/ee-first/-/ee-first-1.1.1.tgz#590c61156b0ae2f4f0255732a158b266bc56b21d"
integrity sha1-WQxhFWsK4vTwJVcyoViyZrxWsh0=

electron-to-chromium@^1.2.7, electron-to-chromium@^1.3.47, electron-to-chromium@^1.3.81:
electron-to-chromium@^1.2.7:
version "1.3.115"
resolved "https://registry.yarnpkg.com/electron-to-chromium/-/electron-to-chromium-1.3.115.tgz#fdaa56c19b9f7386dbf29abc1cc632ff5468ff3b"
integrity sha512-mN2qeapQWdi2B9uddxTZ4nl80y46hbyKY5Wt9Yjih+QZFQLdaujEDK4qJky35WhyxMzHF3ZY41Lgjd2BPDuBhg==

electron-to-chromium@^1.3.47, electron-to-chromium@^1.3.81:
version "1.3.82"
resolved "https://registry.yarnpkg.com/electron-to-chromium/-/electron-to-chromium-1.3.82.tgz#7d13ae4437d2a783de3f4efba96b186c540b67b1"
integrity sha512-NI4nB2IWGcU4JVT1AE8kBb/dFor4zjLHMLsOROPahppeHrR0FG5uslxMmkp/thO1MvPjM2xhlKoY29/I60s0ew==
Expand Down Expand Up @@ -6655,9 +6655,9 @@ jest-validate@^23.5.0:
pretty-format "^23.6.0"

js-base64@^2.1.9:
version "2.4.9"
resolved "https://registry.yarnpkg.com/js-base64/-/js-base64-2.4.9.tgz#748911fb04f48a60c4771b375cac45a80df11c03"
integrity sha512-xcinL3AuDJk7VSzsHgb9DvvIXayBbadtMZ4HFPx8rUszbW1MuNMlwYVC4zzCZ6e1sqZpnNS5ZFYOhXqA39T7LQ==
version "2.5.1"
resolved "https://registry.yarnpkg.com/js-base64/-/js-base64-2.5.1.tgz#1efa39ef2c5f7980bb1784ade4a8af2de3291121"
integrity sha512-M7kLczedRMYX4L8Mdh4MzyAMM9O5osx+4FcOQuTvr3A9F2D9S5JXheN0ewNbrvK2UatkTRhL5ejGmGSjNMiZuw==

js-beautify@^1.7.5:
version "1.8.8"
Expand Down

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