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Copyright 2018 Google LLC
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.

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This module's documentation can be found at https://developer.chrome.com/docs/workbox/modules/workbox-webpack-plugin/

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# Change Log
## 0.5.6
* Fix for regression when people were using numbers as names in source maps. See
#236.
## 0.5.5
* Fix "regression" of unsupported, implementation behavior that half the world
happens to have come to depend on. See #235.
* Fix regression involving function hoisting in SpiderMonkey. See #233.
## 0.5.4
* Large performance improvements to source-map serialization. See #228 and #229.
## 0.5.3
* Do not include unnecessary distribution files. See
commit ef7006f8d1647e0a83fdc60f04f5a7ca54886f86.
## 0.5.2
* Include browser distributions of the library in package.json's `files`. See
issue #212.
## 0.5.1
* Fix latent bugs in IndexedSourceMapConsumer.prototype._parseMappings. See
ff05274becc9e6e1295ed60f3ea090d31d843379.
## 0.5.0
* Node 0.8 is no longer supported.
* Use webpack instead of dryice for bundling.
* Big speedups serializing source maps. See pull request #203.
* Fix a bug with `SourceMapConsumer.prototype.sourceContentFor` and sources that
explicitly start with the source root. See issue #199.
## 0.4.4
* Fix an issue where using a `SourceMapGenerator` after having created a
`SourceMapConsumer` from it via `SourceMapConsumer.fromSourceMap` failed. See
issue #191.
* Fix an issue with where `SourceMapGenerator` would mistakenly consider
different mappings as duplicates of each other and avoid generating them. See
issue #192.
## 0.4.3
* A very large number of performance improvements, particularly when parsing
source maps. Collectively about 75% of time shaved off of the source map
parsing benchmark!
* Fix a bug in `SourceMapConsumer.prototype.allGeneratedPositionsFor` and fuzzy
searching in the presence of a column option. See issue #177.
* Fix a bug with joining a source and its source root when the source is above
the root. See issue #182.
* Add the `SourceMapConsumer.prototype.hasContentsOfAllSources` method to
determine when all sources' contents are inlined into the source map. See
issue #190.
## 0.4.2
* Add an `.npmignore` file so that the benchmarks aren't pulled down by
dependent projects. Issue #169.
* Add an optional `column` argument to
`SourceMapConsumer.prototype.allGeneratedPositionsFor` and better handle lines
with no mappings. Issues #172 and #173.
## 0.4.1
* Fix accidentally defining a global variable. #170.
## 0.4.0
* The default direction for fuzzy searching was changed back to its original
direction. See #164.
* There is now a `bias` option you can supply to `SourceMapConsumer` to control
the fuzzy searching direction. See #167.
* About an 8% speed up in parsing source maps. See #159.
* Added a benchmark for parsing and generating source maps.
## 0.3.0
* Change the default direction that searching for positions fuzzes when there is
not an exact match. See #154.
* Support for environments using json2.js for JSON serialization. See #156.
## 0.2.0
* Support for consuming "indexed" source maps which do not have any remote
sections. See pull request #127. This introduces a minor backwards
incompatibility if you are monkey patching `SourceMapConsumer.prototype`
methods.
## 0.1.43
* Performance improvements for `SourceMapGenerator` and `SourceNode`. See issue
#148 for some discussion and issues #150, #151, and #152 for implementations.
## 0.1.42
* Fix an issue where `SourceNode`s from different versions of the source-map
library couldn't be used in conjunction with each other. See issue #142.
## 0.1.41
* Fix a bug with getting the source content of relative sources with a "./"
prefix. See issue #145 and [Bug 1090768](bugzil.la/1090768).
* Add the `SourceMapConsumer.prototype.computeColumnSpans` method to compute the
column span of each mapping.
* Add the `SourceMapConsumer.prototype.allGeneratedPositionsFor` method to find
all generated positions associated with a given original source and line.
## 0.1.40
* Performance improvements for parsing source maps in SourceMapConsumer.
## 0.1.39
* Fix a bug where setting a source's contents to null before any source content
had been set before threw a TypeError. See issue #131.
## 0.1.38
* Fix a bug where finding relative paths from an empty path were creating
absolute paths. See issue #129.
## 0.1.37
* Fix a bug where if the source root was an empty string, relative source paths
would turn into absolute source paths. Issue #124.
## 0.1.36
* Allow the `names` mapping property to be an empty string. Issue #121.
## 0.1.35
* A third optional parameter was added to `SourceNode.fromStringWithSourceMap`
to specify a path that relative sources in the second parameter should be
relative to. Issue #105.
* If no file property is given to a `SourceMapGenerator`, then the resulting
source map will no longer have a `null` file property. The property will
simply not exist. Issue #104.
* Fixed a bug where consecutive newlines were ignored in `SourceNode`s.
Issue #116.
## 0.1.34
* Make `SourceNode` work with windows style ("\r\n") newlines. Issue #103.
* Fix bug involving source contents and the
`SourceMapGenerator.prototype.applySourceMap`. Issue #100.
## 0.1.33
* Fix some edge cases surrounding path joining and URL resolution.
* Add a third parameter for relative path to
`SourceMapGenerator.prototype.applySourceMap`.
* Fix issues with mappings and EOLs.
## 0.1.32
* Fixed a bug where SourceMapConsumer couldn't handle negative relative columns
(issue 92).
* Fixed test runner to actually report number of failed tests as its process
exit code.
* Fixed a typo when reporting bad mappings (issue 87).
## 0.1.31
* Delay parsing the mappings in SourceMapConsumer until queried for a source
location.
* Support Sass source maps (which at the time of writing deviate from the spec
in small ways) in SourceMapConsumer.
## 0.1.30
* Do not join source root with a source, when the source is a data URI.
* Extend the test runner to allow running single specific test files at a time.
* Performance improvements in `SourceNode.prototype.walk` and
`SourceMapConsumer.prototype.eachMapping`.
* Source map browser builds will now work inside Workers.
* Better error messages when attempting to add an invalid mapping to a
`SourceMapGenerator`.
## 0.1.29
* Allow duplicate entries in the `names` and `sources` arrays of source maps
(usually from TypeScript) we are parsing. Fixes github issue 72.
## 0.1.28
* Skip duplicate mappings when creating source maps from SourceNode; github
issue 75.
## 0.1.27
* Don't throw an error when the `file` property is missing in SourceMapConsumer,
we don't use it anyway.
## 0.1.26
* Fix SourceNode.fromStringWithSourceMap for empty maps. Fixes github issue 70.
## 0.1.25
* Make compatible with browserify
## 0.1.24
* Fix issue with absolute paths and `file://` URIs. See
https://bugzilla.mozilla.org/show_bug.cgi?id=885597
## 0.1.23
* Fix issue with absolute paths and sourcesContent, github issue 64.
## 0.1.22
* Ignore duplicate mappings in SourceMapGenerator. Fixes github issue 21.
## 0.1.21
* Fixed handling of sources that start with a slash so that they are relative to
the source root's host.
## 0.1.20
* Fixed github issue #43: absolute URLs aren't joined with the source root
anymore.
## 0.1.19
* Using Travis CI to run tests.
## 0.1.18
* Fixed a bug in the handling of sourceRoot.
## 0.1.17
* Added SourceNode.fromStringWithSourceMap.
## 0.1.16
* Added missing documentation.
* Fixed the generating of empty mappings in SourceNode.
## 0.1.15
* Added SourceMapGenerator.applySourceMap.
## 0.1.14
* The sourceRoot is now handled consistently.
## 0.1.13
* Added SourceMapGenerator.fromSourceMap.
## 0.1.12
* SourceNode now generates empty mappings too.
## 0.1.11
* Added name support to SourceNode.
## 0.1.10
* Added sourcesContent support to the customer and generator.

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Copyright (c) 2009-2011, Mozilla Foundation and contributors
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
* Redistributions of source code must retain the above copyright notice, this
list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above copyright notice,
this list of conditions and the following disclaimer in the documentation
and/or other materials provided with the distribution.
* Neither the names of the Mozilla Foundation nor the names of project
contributors may be used to endorse or promote products derived from this
software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

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# Source Map
[![Build Status](https://travis-ci.org/mozilla/source-map.png?branch=master)](https://travis-ci.org/mozilla/source-map)
[![NPM](https://nodei.co/npm/source-map.png?downloads=true&downloadRank=true)](https://www.npmjs.com/package/source-map)
This is a library to generate and consume the source map format
[described here][format].
[format]: https://docs.google.com/document/d/1U1RGAehQwRypUTovF1KRlpiOFze0b-_2gc6fAH0KY0k/edit
## Use with Node
$ npm install source-map
## Use on the Web
<script src="https://raw.githubusercontent.com/mozilla/source-map/master/dist/source-map.min.js" defer></script>
--------------------------------------------------------------------------------
<!-- `npm run toc` to regenerate the Table of Contents -->
<!-- START doctoc generated TOC please keep comment here to allow auto update -->
<!-- DON'T EDIT THIS SECTION, INSTEAD RE-RUN doctoc TO UPDATE -->
## Table of Contents
- [Examples](#examples)
- [Consuming a source map](#consuming-a-source-map)
- [Generating a source map](#generating-a-source-map)
- [With SourceNode (high level API)](#with-sourcenode-high-level-api)
- [With SourceMapGenerator (low level API)](#with-sourcemapgenerator-low-level-api)
- [API](#api)
- [SourceMapConsumer](#sourcemapconsumer)
- [new SourceMapConsumer(rawSourceMap)](#new-sourcemapconsumerrawsourcemap)
- [SourceMapConsumer.prototype.computeColumnSpans()](#sourcemapconsumerprototypecomputecolumnspans)
- [SourceMapConsumer.prototype.originalPositionFor(generatedPosition)](#sourcemapconsumerprototypeoriginalpositionforgeneratedposition)
- [SourceMapConsumer.prototype.generatedPositionFor(originalPosition)](#sourcemapconsumerprototypegeneratedpositionfororiginalposition)
- [SourceMapConsumer.prototype.allGeneratedPositionsFor(originalPosition)](#sourcemapconsumerprototypeallgeneratedpositionsfororiginalposition)
- [SourceMapConsumer.prototype.hasContentsOfAllSources()](#sourcemapconsumerprototypehascontentsofallsources)
- [SourceMapConsumer.prototype.sourceContentFor(source[, returnNullOnMissing])](#sourcemapconsumerprototypesourcecontentforsource-returnnullonmissing)
- [SourceMapConsumer.prototype.eachMapping(callback, context, order)](#sourcemapconsumerprototypeeachmappingcallback-context-order)
- [SourceMapGenerator](#sourcemapgenerator)
- [new SourceMapGenerator([startOfSourceMap])](#new-sourcemapgeneratorstartofsourcemap)
- [SourceMapGenerator.fromSourceMap(sourceMapConsumer)](#sourcemapgeneratorfromsourcemapsourcemapconsumer)
- [SourceMapGenerator.prototype.addMapping(mapping)](#sourcemapgeneratorprototypeaddmappingmapping)
- [SourceMapGenerator.prototype.setSourceContent(sourceFile, sourceContent)](#sourcemapgeneratorprototypesetsourcecontentsourcefile-sourcecontent)
- [SourceMapGenerator.prototype.applySourceMap(sourceMapConsumer[, sourceFile[, sourceMapPath]])](#sourcemapgeneratorprototypeapplysourcemapsourcemapconsumer-sourcefile-sourcemappath)
- [SourceMapGenerator.prototype.toString()](#sourcemapgeneratorprototypetostring)
- [SourceNode](#sourcenode)
- [new SourceNode([line, column, source[, chunk[, name]]])](#new-sourcenodeline-column-source-chunk-name)
- [SourceNode.fromStringWithSourceMap(code, sourceMapConsumer[, relativePath])](#sourcenodefromstringwithsourcemapcode-sourcemapconsumer-relativepath)
- [SourceNode.prototype.add(chunk)](#sourcenodeprototypeaddchunk)
- [SourceNode.prototype.prepend(chunk)](#sourcenodeprototypeprependchunk)
- [SourceNode.prototype.setSourceContent(sourceFile, sourceContent)](#sourcenodeprototypesetsourcecontentsourcefile-sourcecontent)
- [SourceNode.prototype.walk(fn)](#sourcenodeprototypewalkfn)
- [SourceNode.prototype.walkSourceContents(fn)](#sourcenodeprototypewalksourcecontentsfn)
- [SourceNode.prototype.join(sep)](#sourcenodeprototypejoinsep)
- [SourceNode.prototype.replaceRight(pattern, replacement)](#sourcenodeprototypereplacerightpattern-replacement)
- [SourceNode.prototype.toString()](#sourcenodeprototypetostring)
- [SourceNode.prototype.toStringWithSourceMap([startOfSourceMap])](#sourcenodeprototypetostringwithsourcemapstartofsourcemap)
<!-- END doctoc generated TOC please keep comment here to allow auto update -->
## Examples
### Consuming a source map
```js
var rawSourceMap = {
version: 3,
file: 'min.js',
names: ['bar', 'baz', 'n'],
sources: ['one.js', 'two.js'],
sourceRoot: 'http://example.com/www/js/',
mappings: 'CAAC,IAAI,IAAM,SAAUA,GAClB,OAAOC,IAAID;CCDb,IAAI,IAAM,SAAUE,GAClB,OAAOA'
};
var smc = new SourceMapConsumer(rawSourceMap);
console.log(smc.sources);
// [ 'http://example.com/www/js/one.js',
// 'http://example.com/www/js/two.js' ]
console.log(smc.originalPositionFor({
line: 2,
column: 28
}));
// { source: 'http://example.com/www/js/two.js',
// line: 2,
// column: 10,
// name: 'n' }
console.log(smc.generatedPositionFor({
source: 'http://example.com/www/js/two.js',
line: 2,
column: 10
}));
// { line: 2, column: 28 }
smc.eachMapping(function (m) {
// ...
});
```
### Generating a source map
In depth guide:
[**Compiling to JavaScript, and Debugging with Source Maps**](https://hacks.mozilla.org/2013/05/compiling-to-javascript-and-debugging-with-source-maps/)
#### With SourceNode (high level API)
```js
function compile(ast) {
switch (ast.type) {
case 'BinaryExpression':
return new SourceNode(
ast.location.line,
ast.location.column,
ast.location.source,
[compile(ast.left), " + ", compile(ast.right)]
);
case 'Literal':
return new SourceNode(
ast.location.line,
ast.location.column,
ast.location.source,
String(ast.value)
);
// ...
default:
throw new Error("Bad AST");
}
}
var ast = parse("40 + 2", "add.js");
console.log(compile(ast).toStringWithSourceMap({
file: 'add.js'
}));
// { code: '40 + 2',
// map: [object SourceMapGenerator] }
```
#### With SourceMapGenerator (low level API)
```js
var map = new SourceMapGenerator({
file: "source-mapped.js"
});
map.addMapping({
generated: {
line: 10,
column: 35
},
source: "foo.js",
original: {
line: 33,
column: 2
},
name: "christopher"
});
console.log(map.toString());
// '{"version":3,"file":"source-mapped.js","sources":["foo.js"],"names":["christopher"],"mappings":";;;;;;;;;mCAgCEA"}'
```
## API
Get a reference to the module:
```js
// Node.js
var sourceMap = require('source-map');
// Browser builds
var sourceMap = window.sourceMap;
// Inside Firefox
const sourceMap = require("devtools/toolkit/sourcemap/source-map.js");
```
### SourceMapConsumer
A SourceMapConsumer instance represents a parsed source map which we can query
for information about the original file positions by giving it a file position
in the generated source.
#### new SourceMapConsumer(rawSourceMap)
The only parameter is the raw source map (either as a string which can be
`JSON.parse`'d, or an object). According to the spec, source maps have the
following attributes:
* `version`: Which version of the source map spec this map is following.
* `sources`: An array of URLs to the original source files.
* `names`: An array of identifiers which can be referenced by individual
mappings.
* `sourceRoot`: Optional. The URL root from which all sources are relative.
* `sourcesContent`: Optional. An array of contents of the original source files.
* `mappings`: A string of base64 VLQs which contain the actual mappings.
* `file`: Optional. The generated filename this source map is associated with.
```js
var consumer = new sourceMap.SourceMapConsumer(rawSourceMapJsonData);
```
#### SourceMapConsumer.prototype.computeColumnSpans()
Compute the last column for each generated mapping. The last column is
inclusive.
```js
// Before:
consumer.allGeneratedPositionsFor({ line: 2, source: "foo.coffee" })
// [ { line: 2,
// column: 1 },
// { line: 2,
// column: 10 },
// { line: 2,
// column: 20 } ]
consumer.computeColumnSpans();
// After:
consumer.allGeneratedPositionsFor({ line: 2, source: "foo.coffee" })
// [ { line: 2,
// column: 1,
// lastColumn: 9 },
// { line: 2,
// column: 10,
// lastColumn: 19 },
// { line: 2,
// column: 20,
// lastColumn: Infinity } ]
```
#### SourceMapConsumer.prototype.originalPositionFor(generatedPosition)
Returns the original source, line, and column information for the generated
source's line and column positions provided. The only argument is an object with
the following properties:
* `line`: The line number in the generated source. Line numbers in
this library are 1-based (note that the underlying source map
specification uses 0-based line numbers -- this library handles the
translation).
* `column`: The column number in the generated source. Column numbers
in this library are 0-based.
* `bias`: Either `SourceMapConsumer.GREATEST_LOWER_BOUND` or
`SourceMapConsumer.LEAST_UPPER_BOUND`. Specifies whether to return the closest
element that is smaller than or greater than the one we are searching for,
respectively, if the exact element cannot be found. Defaults to
`SourceMapConsumer.GREATEST_LOWER_BOUND`.
and an object is returned with the following properties:
* `source`: The original source file, or null if this information is not
available.
* `line`: The line number in the original source, or null if this information is
not available. The line number is 1-based.
* `column`: The column number in the original source, or null if this
information is not available. The column number is 0-based.
* `name`: The original identifier, or null if this information is not available.
```js
consumer.originalPositionFor({ line: 2, column: 10 })
// { source: 'foo.coffee',
// line: 2,
// column: 2,
// name: null }
consumer.originalPositionFor({ line: 99999999999999999, column: 999999999999999 })
// { source: null,
// line: null,
// column: null,
// name: null }
```
#### SourceMapConsumer.prototype.generatedPositionFor(originalPosition)
Returns the generated line and column information for the original source,
line, and column positions provided. The only argument is an object with
the following properties:
* `source`: The filename of the original source.
* `line`: The line number in the original source. The line number is
1-based.
* `column`: The column number in the original source. The column
number is 0-based.
and an object is returned with the following properties:
* `line`: The line number in the generated source, or null. The line
number is 1-based.
* `column`: The column number in the generated source, or null. The
column number is 0-based.
```js
consumer.generatedPositionFor({ source: "example.js", line: 2, column: 10 })
// { line: 1,
// column: 56 }
```
#### SourceMapConsumer.prototype.allGeneratedPositionsFor(originalPosition)
Returns all generated line and column information for the original source, line,
and column provided. If no column is provided, returns all mappings
corresponding to a either the line we are searching for or the next closest line
that has any mappings. Otherwise, returns all mappings corresponding to the
given line and either the column we are searching for or the next closest column
that has any offsets.
The only argument is an object with the following properties:
* `source`: The filename of the original source.
* `line`: The line number in the original source. The line number is
1-based.
* `column`: Optional. The column number in the original source. The
column number is 0-based.
and an array of objects is returned, each with the following properties:
* `line`: The line number in the generated source, or null. The line
number is 1-based.
* `column`: The column number in the generated source, or null. The
column number is 0-based.
```js
consumer.allGeneratedpositionsfor({ line: 2, source: "foo.coffee" })
// [ { line: 2,
// column: 1 },
// { line: 2,
// column: 10 },
// { line: 2,
// column: 20 } ]
```
#### SourceMapConsumer.prototype.hasContentsOfAllSources()
Return true if we have the embedded source content for every source listed in
the source map, false otherwise.
In other words, if this method returns `true`, then
`consumer.sourceContentFor(s)` will succeed for every source `s` in
`consumer.sources`.
```js
// ...
if (consumer.hasContentsOfAllSources()) {
consumerReadyCallback(consumer);
} else {
fetchSources(consumer, consumerReadyCallback);
}
// ...
```
#### SourceMapConsumer.prototype.sourceContentFor(source[, returnNullOnMissing])
Returns the original source content for the source provided. The only
argument is the URL of the original source file.
If the source content for the given source is not found, then an error is
thrown. Optionally, pass `true` as the second param to have `null` returned
instead.
```js
consumer.sources
// [ "my-cool-lib.clj" ]
consumer.sourceContentFor("my-cool-lib.clj")
// "..."
consumer.sourceContentFor("this is not in the source map");
// Error: "this is not in the source map" is not in the source map
consumer.sourceContentFor("this is not in the source map", true);
// null
```
#### SourceMapConsumer.prototype.eachMapping(callback, context, order)
Iterate over each mapping between an original source/line/column and a
generated line/column in this source map.
* `callback`: The function that is called with each mapping. Mappings have the
form `{ source, generatedLine, generatedColumn, originalLine, originalColumn,
name }`
* `context`: Optional. If specified, this object will be the value of `this`
every time that `callback` is called.
* `order`: Either `SourceMapConsumer.GENERATED_ORDER` or
`SourceMapConsumer.ORIGINAL_ORDER`. Specifies whether you want to iterate over
the mappings sorted by the generated file's line/column order or the
original's source/line/column order, respectively. Defaults to
`SourceMapConsumer.GENERATED_ORDER`.
```js
consumer.eachMapping(function (m) { console.log(m); })
// ...
// { source: 'illmatic.js',
// generatedLine: 1,
// generatedColumn: 0,
// originalLine: 1,
// originalColumn: 0,
// name: null }
// { source: 'illmatic.js',
// generatedLine: 2,
// generatedColumn: 0,
// originalLine: 2,
// originalColumn: 0,
// name: null }
// ...
```
### SourceMapGenerator
An instance of the SourceMapGenerator represents a source map which is being
built incrementally.
#### new SourceMapGenerator([startOfSourceMap])
You may pass an object with the following properties:
* `file`: The filename of the generated source that this source map is
associated with.
* `sourceRoot`: A root for all relative URLs in this source map.
* `skipValidation`: Optional. When `true`, disables validation of mappings as
they are added. This can improve performance but should be used with
discretion, as a last resort. Even then, one should avoid using this flag when
running tests, if possible.
```js
var generator = new sourceMap.SourceMapGenerator({
file: "my-generated-javascript-file.js",
sourceRoot: "http://example.com/app/js/"
});
```
#### SourceMapGenerator.fromSourceMap(sourceMapConsumer)
Creates a new `SourceMapGenerator` from an existing `SourceMapConsumer` instance.
* `sourceMapConsumer` The SourceMap.
```js
var generator = sourceMap.SourceMapGenerator.fromSourceMap(consumer);
```
#### SourceMapGenerator.prototype.addMapping(mapping)
Add a single mapping from original source line and column to the generated
source's line and column for this source map being created. The mapping object
should have the following properties:
* `generated`: An object with the generated line and column positions.
* `original`: An object with the original line and column positions.
* `source`: The original source file (relative to the sourceRoot).
* `name`: An optional original token name for this mapping.
```js
generator.addMapping({
source: "module-one.scm",
original: { line: 128, column: 0 },
generated: { line: 3, column: 456 }
})
```
#### SourceMapGenerator.prototype.setSourceContent(sourceFile, sourceContent)
Set the source content for an original source file.
* `sourceFile` the URL of the original source file.
* `sourceContent` the content of the source file.
```js
generator.setSourceContent("module-one.scm",
fs.readFileSync("path/to/module-one.scm"))
```
#### SourceMapGenerator.prototype.applySourceMap(sourceMapConsumer[, sourceFile[, sourceMapPath]])
Applies a SourceMap for a source file to the SourceMap.
Each mapping to the supplied source file is rewritten using the
supplied SourceMap. Note: The resolution for the resulting mappings
is the minimum of this map and the supplied map.
* `sourceMapConsumer`: The SourceMap to be applied.
* `sourceFile`: Optional. The filename of the source file.
If omitted, sourceMapConsumer.file will be used, if it exists.
Otherwise an error will be thrown.
* `sourceMapPath`: Optional. The dirname of the path to the SourceMap
to be applied. If relative, it is relative to the SourceMap.
This parameter is needed when the two SourceMaps aren't in the same
directory, and the SourceMap to be applied contains relative source
paths. If so, those relative source paths need to be rewritten
relative to the SourceMap.
If omitted, it is assumed that both SourceMaps are in the same directory,
thus not needing any rewriting. (Supplying `'.'` has the same effect.)
#### SourceMapGenerator.prototype.toString()
Renders the source map being generated to a string.
```js
generator.toString()
// '{"version":3,"sources":["module-one.scm"],"names":[],"mappings":"...snip...","file":"my-generated-javascript-file.js","sourceRoot":"http://example.com/app/js/"}'
```
### SourceNode
SourceNodes provide a way to abstract over interpolating and/or concatenating
snippets of generated JavaScript source code, while maintaining the line and
column information associated between those snippets and the original source
code. This is useful as the final intermediate representation a compiler might
use before outputting the generated JS and source map.
#### new SourceNode([line, column, source[, chunk[, name]]])
* `line`: The original line number associated with this source node, or null if
it isn't associated with an original line. The line number is 1-based.
* `column`: The original column number associated with this source node, or null
if it isn't associated with an original column. The column number
is 0-based.
* `source`: The original source's filename; null if no filename is provided.
* `chunk`: Optional. Is immediately passed to `SourceNode.prototype.add`, see
below.
* `name`: Optional. The original identifier.
```js
var node = new SourceNode(1, 2, "a.cpp", [
new SourceNode(3, 4, "b.cpp", "extern int status;\n"),
new SourceNode(5, 6, "c.cpp", "std::string* make_string(size_t n);\n"),
new SourceNode(7, 8, "d.cpp", "int main(int argc, char** argv) {}\n"),
]);
```
#### SourceNode.fromStringWithSourceMap(code, sourceMapConsumer[, relativePath])
Creates a SourceNode from generated code and a SourceMapConsumer.
* `code`: The generated code
* `sourceMapConsumer` The SourceMap for the generated code
* `relativePath` The optional path that relative sources in `sourceMapConsumer`
should be relative to.
```js
var consumer = new SourceMapConsumer(fs.readFileSync("path/to/my-file.js.map", "utf8"));
var node = SourceNode.fromStringWithSourceMap(fs.readFileSync("path/to/my-file.js"),
consumer);
```
#### SourceNode.prototype.add(chunk)
Add a chunk of generated JS to this source node.
* `chunk`: A string snippet of generated JS code, another instance of
`SourceNode`, or an array where each member is one of those things.
```js
node.add(" + ");
node.add(otherNode);
node.add([leftHandOperandNode, " + ", rightHandOperandNode]);
```
#### SourceNode.prototype.prepend(chunk)
Prepend a chunk of generated JS to this source node.
* `chunk`: A string snippet of generated JS code, another instance of
`SourceNode`, or an array where each member is one of those things.
```js
node.prepend("/** Build Id: f783haef86324gf **/\n\n");
```
#### SourceNode.prototype.setSourceContent(sourceFile, sourceContent)
Set the source content for a source file. This will be added to the
`SourceMap` in the `sourcesContent` field.
* `sourceFile`: The filename of the source file
* `sourceContent`: The content of the source file
```js
node.setSourceContent("module-one.scm",
fs.readFileSync("path/to/module-one.scm"))
```
#### SourceNode.prototype.walk(fn)
Walk over the tree of JS snippets in this node and its children. The walking
function is called once for each snippet of JS and is passed that snippet and
the its original associated source's line/column location.
* `fn`: The traversal function.
```js
var node = new SourceNode(1, 2, "a.js", [
new SourceNode(3, 4, "b.js", "uno"),
"dos",
[
"tres",
new SourceNode(5, 6, "c.js", "quatro")
]
]);
node.walk(function (code, loc) { console.log("WALK:", code, loc); })
// WALK: uno { source: 'b.js', line: 3, column: 4, name: null }
// WALK: dos { source: 'a.js', line: 1, column: 2, name: null }
// WALK: tres { source: 'a.js', line: 1, column: 2, name: null }
// WALK: quatro { source: 'c.js', line: 5, column: 6, name: null }
```
#### SourceNode.prototype.walkSourceContents(fn)
Walk over the tree of SourceNodes. The walking function is called for each
source file content and is passed the filename and source content.
* `fn`: The traversal function.
```js
var a = new SourceNode(1, 2, "a.js", "generated from a");
a.setSourceContent("a.js", "original a");
var b = new SourceNode(1, 2, "b.js", "generated from b");
b.setSourceContent("b.js", "original b");
var c = new SourceNode(1, 2, "c.js", "generated from c");
c.setSourceContent("c.js", "original c");
var node = new SourceNode(null, null, null, [a, b, c]);
node.walkSourceContents(function (source, contents) { console.log("WALK:", source, ":", contents); })
// WALK: a.js : original a
// WALK: b.js : original b
// WALK: c.js : original c
```
#### SourceNode.prototype.join(sep)
Like `Array.prototype.join` except for SourceNodes. Inserts the separator
between each of this source node's children.
* `sep`: The separator.
```js
var lhs = new SourceNode(1, 2, "a.rs", "my_copy");
var operand = new SourceNode(3, 4, "a.rs", "=");
var rhs = new SourceNode(5, 6, "a.rs", "orig.clone()");
var node = new SourceNode(null, null, null, [ lhs, operand, rhs ]);
var joinedNode = node.join(" ");
```
#### SourceNode.prototype.replaceRight(pattern, replacement)
Call `String.prototype.replace` on the very right-most source snippet. Useful
for trimming white space from the end of a source node, etc.
* `pattern`: The pattern to replace.
* `replacement`: The thing to replace the pattern with.
```js
// Trim trailing white space.
node.replaceRight(/\s*$/, "");
```
#### SourceNode.prototype.toString()
Return the string representation of this source node. Walks over the tree and
concatenates all the various snippets together to one string.
```js
var node = new SourceNode(1, 2, "a.js", [
new SourceNode(3, 4, "b.js", "uno"),
"dos",
[
"tres",
new SourceNode(5, 6, "c.js", "quatro")
]
]);
node.toString()
// 'unodostresquatro'
```
#### SourceNode.prototype.toStringWithSourceMap([startOfSourceMap])
Returns the string representation of this tree of source nodes, plus a
SourceMapGenerator which contains all the mappings between the generated and
original sources.
The arguments are the same as those to `new SourceMapGenerator`.
```js
var node = new SourceNode(1, 2, "a.js", [
new SourceNode(3, 4, "b.js", "uno"),
"dos",
[
"tres",
new SourceNode(5, 6, "c.js", "quatro")
]
]);
node.toStringWithSourceMap({ file: "my-output-file.js" })
// { code: 'unodostresquatro',
// map: [object SourceMapGenerator] }
```

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{
"name": "source-map",
"description": "Generates and consumes source maps",
"version": "0.6.1",
"homepage": "https://github.com/mozilla/source-map",
"author": "Nick Fitzgerald <nfitzgerald@mozilla.com>",
"contributors": [
"Tobias Koppers <tobias.koppers@googlemail.com>",
"Duncan Beevers <duncan@dweebd.com>",
"Stephen Crane <scrane@mozilla.com>",
"Ryan Seddon <seddon.ryan@gmail.com>",
"Miles Elam <miles.elam@deem.com>",
"Mihai Bazon <mihai.bazon@gmail.com>",
"Michael Ficarra <github.public.email@michael.ficarra.me>",
"Todd Wolfson <todd@twolfson.com>",
"Alexander Solovyov <alexander@solovyov.net>",
"Felix Gnass <fgnass@gmail.com>",
"Conrad Irwin <conrad.irwin@gmail.com>",
"usrbincc <usrbincc@yahoo.com>",
"David Glasser <glasser@davidglasser.net>",
"Chase Douglas <chase@newrelic.com>",
"Evan Wallace <evan.exe@gmail.com>",
"Heather Arthur <fayearthur@gmail.com>",
"Hugh Kennedy <hughskennedy@gmail.com>",
"David Glasser <glasser@davidglasser.net>",
"Simon Lydell <simon.lydell@gmail.com>",
"Jmeas Smith <jellyes2@gmail.com>",
"Michael Z Goddard <mzgoddard@gmail.com>",
"azu <azu@users.noreply.github.com>",
"John Gozde <john@gozde.ca>",
"Adam Kirkton <akirkton@truefitinnovation.com>",
"Chris Montgomery <christopher.montgomery@dowjones.com>",
"J. Ryan Stinnett <jryans@gmail.com>",
"Jack Herrington <jherrington@walmartlabs.com>",
"Chris Truter <jeffpalentine@gmail.com>",
"Daniel Espeset <daniel@danielespeset.com>",
"Jamie Wong <jamie.lf.wong@gmail.com>",
"Eddy Bruël <ejpbruel@mozilla.com>",
"Hawken Rives <hawkrives@gmail.com>",
"Gilad Peleg <giladp007@gmail.com>",
"djchie <djchie.dev@gmail.com>",
"Gary Ye <garysye@gmail.com>",
"Nicolas Lalevée <nicolas.lalevee@hibnet.org>"
],
"repository": {
"type": "git",
"url": "http://github.com/mozilla/source-map.git"
},
"main": "./source-map.js",
"files": [
"source-map.js",
"source-map.d.ts",
"lib/",
"dist/source-map.debug.js",
"dist/source-map.js",
"dist/source-map.min.js",
"dist/source-map.min.js.map"
],
"engines": {
"node": ">=0.10.0"
},
"license": "BSD-3-Clause",
"scripts": {
"test": "npm run build && node test/run-tests.js",
"build": "webpack --color",
"toc": "doctoc --title '## Table of Contents' README.md && doctoc --title '## Table of Contents' CONTRIBUTING.md"
},
"devDependencies": {
"doctoc": "^0.15.0",
"webpack": "^1.12.0"
},
"typings": "source-map"
}

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export interface StartOfSourceMap {
file?: string;
sourceRoot?: string;
}
export interface RawSourceMap extends StartOfSourceMap {
version: string;
sources: string[];
names: string[];
sourcesContent?: string[];
mappings: string;
}
export interface Position {
line: number;
column: number;
}
export interface LineRange extends Position {
lastColumn: number;
}
export interface FindPosition extends Position {
// SourceMapConsumer.GREATEST_LOWER_BOUND or SourceMapConsumer.LEAST_UPPER_BOUND
bias?: number;
}
export interface SourceFindPosition extends FindPosition {
source: string;
}
export interface MappedPosition extends Position {
source: string;
name?: string;
}
export interface MappingItem {
source: string;
generatedLine: number;
generatedColumn: number;
originalLine: number;
originalColumn: number;
name: string;
}
export class SourceMapConsumer {
static GENERATED_ORDER: number;
static ORIGINAL_ORDER: number;
static GREATEST_LOWER_BOUND: number;
static LEAST_UPPER_BOUND: number;
constructor(rawSourceMap: RawSourceMap);
computeColumnSpans(): void;
originalPositionFor(generatedPosition: FindPosition): MappedPosition;
generatedPositionFor(originalPosition: SourceFindPosition): LineRange;
allGeneratedPositionsFor(originalPosition: MappedPosition): Position[];
hasContentsOfAllSources(): boolean;
sourceContentFor(source: string, returnNullOnMissing?: boolean): string;
eachMapping(callback: (mapping: MappingItem) => void, context?: any, order?: number): void;
}
export interface Mapping {
generated: Position;
original: Position;
source: string;
name?: string;
}
export class SourceMapGenerator {
constructor(startOfSourceMap?: StartOfSourceMap);
static fromSourceMap(sourceMapConsumer: SourceMapConsumer): SourceMapGenerator;
addMapping(mapping: Mapping): void;
setSourceContent(sourceFile: string, sourceContent: string): void;
applySourceMap(sourceMapConsumer: SourceMapConsumer, sourceFile?: string, sourceMapPath?: string): void;
toString(): string;
}
export interface CodeWithSourceMap {
code: string;
map: SourceMapGenerator;
}
export class SourceNode {
constructor();
constructor(line: number, column: number, source: string);
constructor(line: number, column: number, source: string, chunk?: string, name?: string);
static fromStringWithSourceMap(code: string, sourceMapConsumer: SourceMapConsumer, relativePath?: string): SourceNode;
add(chunk: string): void;
prepend(chunk: string): void;
setSourceContent(sourceFile: string, sourceContent: string): void;
walk(fn: (chunk: string, mapping: MappedPosition) => void): void;
walkSourceContents(fn: (file: string, content: string) => void): void;
join(sep: string): SourceNode;
replaceRight(pattern: string, replacement: string): SourceNode;
toString(): string;
toStringWithSourceMap(startOfSourceMap?: StartOfSourceMap): CodeWithSourceMap;
}

8
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/*
* Copyright 2009-2011 Mozilla Foundation and contributors
* Licensed under the New BSD license. See LICENSE.txt or:
* http://opensource.org/licenses/BSD-3-Clause
*/
exports.SourceMapGenerator = require('./lib/source-map-generator').SourceMapGenerator;
exports.SourceMapConsumer = require('./lib/source-map-consumer').SourceMapConsumer;
exports.SourceNode = require('./lib/source-node').SourceNode;

21
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MIT License
Copyright (c) 2017 JS Foundation and other contributors
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.

230
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# webpack-sources
Contains multiple classes which represent a `Source`. A `Source` can be asked for source code, size, source map and hash.
## `Source`
Base class for all sources.
### Public methods
All methods should be considered as expensive as they may need to do computations.
#### `source`
``` js
Source.prototype.source() -> String | ArrayBuffer
```
Returns the represented source code as string.
#### `size`
``` js
Source.prototype.size() -> Number
```
Returns the size in chars of the represented source code.
#### `map`
``` js
Source.prototype.map(options: Object) -> Object | null
```
Returns the SourceMap of the represented source code as JSON. May return `null` if no SourceMap is available.
The `options` object can contain the following keys:
* `columns: Boolean` (default `true`): If set to false the implementation may omit mappings for columns.
* `module: Boolean` (default `true`): If set to false the implementation may omit inner mappings for modules.
#### `sourceAndMap`
``` js
Source.prototype.sourceAndMap(options: Object) -> {
source: String,
map: Object
}
```
Returns both, source code (like `Source.prototype.source()` and SourceMap (like `Source.prototype.map()`). This method could have better performance than calling `source()` and `map()` separately.
See `map()` for `options`.
#### `updateHash`
``` js
Source.prototype.updateHash(hash: Hash) -> void
```
Updates the provided `Hash` object with the content of the represented source code. (`Hash` is an object with an `update` method, which is called with string values)
#### `node` (optional)
``` js
Source.prototype.node(options: Object) -> SourceNode
```
This is an optional method. It may be `null` if not implemented.
Returns a `SourceNode` (see source-map library) for the represented source code.
See `map()` for `options`.
#### `listNode` (optional)
``` js
Source.prototype.listNode(options: Object) -> SourceNode
```
This is an optional method. It may be `null` if not implemented.
Returns a `SourceListMap` (see source-list-map library) for the represented source code.
See `map()` for `options`.
## `RawSource`
Represents source code without SourceMap.
``` js
new RawSource(sourceCode: String)
```
## `OriginalSource`
Represents source code, which is a copy of the original file.
``` js
new OriginalSource(
sourceCode: String,
name: String
)
```
* `sourceCode`: The source code.
* `name`: The filename of the original source code.
OriginalSource tries to create column mappings if requested, by splitting the source code at typical statement borders (`;`, `{`, `}`).
## `SourceMapSource`
Represents source code with SourceMap, optionally having an additional SourceMap for the original source.
``` js
new SourceMapSource(
sourceCode: String,
name: String,
sourceMap: Object | String,
originalSource?: String,
innerSourceMap?: Object | String,
removeOriginalSource?: boolean
)
```
* `sourceCode`: The source code.
* `name`: The filename of the original source code.
* `sourceMap`: The SourceMap for the source code.
* `originalSource`: The source code of the original file. Can be omitted if the `sourceMap` already contains the original source code.
* `innerSourceMap`: The SourceMap for the `originalSource`/`name`.
* `removeOriginalSource`: Removes the source code for `name` from the final map, keeping only the deeper mappings for that file.
The `SourceMapSource` supports "identity" mappings for the `innerSourceMap`.
When original source matches generated source for a mapping it's assumed to be mapped char by char allowing to keep finer mappings from `sourceMap`.
## `LineToLineMappedSource`
Represents source code, which is mapped line by line to the original file.
``` js
new LineToLineMappedSource(
sourceCode: String,
name: String,
originalSource: String
)
```
* `sourceCode`: The source code.
* `name`: The filename of the original source code.
* `originalSource`: The original source code.
## `CachedSource`
Decorates a `Source` and caches returned results of `map`, `source`, `size` and `sourceAndMap` in memory. Every other operation is delegated to the wrapped `Source`.
``` js
new CachedSource(source: Source)
```
## `PrefixSource`
Prefix every line of the decorated `Source` with a provided string.
``` js
new PrefixSource(
prefix: String,
source: Source
)
```
## `ConcatSource`
Concatenate multiple `Source`s or strings to a single source.
``` js
new ConcatSource(
...items?: Source | String
)
```
### Public methods
#### `add`
``` js
ConcatSource.prototype.add(item: Source | String)
```
Adds an item to the source.
## `ReplaceSource`
Decorates a `Source` with replacements and insertions of source code.
The `ReplaceSource` supports "identity" mappings for child source.
When original source matches generated source for a mapping it's assumed to be mapped char by char allowing to split mappings at replacements/insertions.
### Public methods
#### `replace`
``` js
ReplaceSource.prototype.replace(
start: Number,
end: Number,
replacement: String
)
```
Replaces chars from `start` (0-indexed, inclusive) to `end` (0-indexed, inclusive) with `replacement`.
Locations represents locations in the original source and are not influenced by other replacements or insertions.
#### `insert`
``` js
ReplaceSource.prototype.insert(
pos: Number,
insertion: String
)
```
Inserts the `insertion` before char `pos` (0-indexed).
Location represents location in the original source and is not influenced by other replacements or insertions.
#### `original`
Get decorated `Source`.

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{
"name": "webpack-sources",
"version": "1.4.3",
"description": "Source code handling classes for webpack",
"main": "./lib/index.js",
"scripts": {
"pretest": "npm run lint && npm run beautify-lint",
"test": "mocha --full-trace --check-leaks",
"travis": "npm run cover -- --report lcovonly",
"lint": "eslint lib test",
"beautify-lint": "beautify-lint lib/**.js test/**.js",
"beautify": "beautify-rewrite lib/**.js test/**.js",
"precover": "npm run lint && npm run beautify-lint",
"cover": "istanbul cover node_modules/mocha/bin/_mocha",
"publish-patch": "npm test && npm version patch && git push && git push --tags && npm publish"
},
"dependencies": {
"source-list-map": "^2.0.0",
"source-map": "~0.6.1"
},
"devDependencies": {
"beautify-lint": "^1.0.3",
"codecov.io": "^0.1.6",
"coveralls": "^2.11.6",
"eslint": "^4.18.2",
"eslint-plugin-nodeca": "^1.0.3",
"istanbul": "^0.4.1",
"js-beautify": "^1.5.10",
"mocha": "^3.4.2",
"should": "^11.2.1",
"sourcemap-validator": "^1.1.0"
},
"files": [
"lib/"
],
"repository": {
"type": "git",
"url": "git+https://github.com/webpack/webpack-sources.git"
},
"keywords": [
"webpack",
"source-map"
],
"author": "Tobias Koppers @sokra",
"license": "MIT",
"bugs": {
"url": "https://github.com/webpack/webpack-sources/issues"
},
"homepage": "https://github.com/webpack/webpack-sources#readme"
}

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{
"name": "workbox-webpack-plugin",
"version": "6.6.0",
"description": "A plugin for your Webpack build process, helping you generate a manifest of local files that workbox-sw should precache.",
"keywords": [
"workbox",
"workboxjs",
"webpack",
"service worker",
"caching",
"fetch requests",
"offline",
"file manifest"
],
"workbox": {
"packageType": "node_ts"
},
"main": "build/index.js",
"types": "build/index.d.ts",
"engines": {
"node": ">=10.0.0"
},
"dependencies": {
"fast-json-stable-stringify": "^2.1.0",
"pretty-bytes": "^5.4.1",
"upath": "^1.2.0",
"webpack-sources": "^1.4.3",
"workbox-build": "6.6.0"
},
"peerDependencies": {
"webpack": "^4.4.0 || ^5.9.0"
},
"devDependencies": {
"@types/node": "^18.15.11",
"@types/webpack": "^5.28.1"
},
"author": "Google's Web DevRel Team",
"license": "MIT",
"repository": "googlechrome/workbox",
"bugs": "https://github.com/GoogleChrome/workbox/issues",
"homepage": "https://github.com/GoogleChrome/workbox",
"gitHead": "252644491d9bb5a67518935ede6df530107c9475"
}

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/*
Copyright 2018 Google LLC
Use of this source code is governed by an MIT-style
license that can be found in the LICENSE file or at
https://opensource.org/licenses/MIT.
*/
import {validateWebpackGenerateSWOptions} from 'workbox-build/build/lib/validate-options';
import {bundle} from 'workbox-build/build/lib/bundle';
import {populateSWTemplate} from 'workbox-build/build/lib/populate-sw-template';
import prettyBytes from 'pretty-bytes';
import webpack from 'webpack';
import {ManifestEntry, WebpackGenerateSWOptions} from 'workbox-build';
import {getScriptFilesForChunks} from './lib/get-script-files-for-chunks';
import {getManifestEntriesFromCompilation} from './lib/get-manifest-entries-from-compilation';
import {relativeToOutputPath} from './lib/relative-to-output-path';
// webpack v4/v5 compatibility:
// https://github.com/webpack/webpack/issues/11425#issuecomment-686607633
const {RawSource} = webpack.sources || require('webpack-sources');
// Used to keep track of swDest files written by *any* instance of this plugin.
// See https://github.com/GoogleChrome/workbox/issues/2181
const _generatedAssetNames = new Set<string>();
export interface GenerateSWConfig extends WebpackGenerateSWOptions {
manifestEntries?: Array<ManifestEntry>;
}
/**
* This class supports creating a new, ready-to-use service worker file as
* part of the webpack compilation process.
*
* Use an instance of `GenerateSW` in the
* [`plugins` array](https://webpack.js.org/concepts/plugins/#usage) of a
* webpack config.
*
* ```
* // The following lists some common options; see the rest of the documentation
* // for the full set of options and defaults.
* new GenerateSW({
* exclude: [/.../, '...'],
* maximumFileSizeToCacheInBytes: ...,
* navigateFallback: '...',
* runtimeCaching: [{
* // Routing via a matchCallback function:
* urlPattern: ({request, url}) => ...,
* handler: '...',
* options: {
* cacheName: '...',
* expiration: {
* maxEntries: ...,
* },
* },
* }, {
* // Routing via a RegExp:
* urlPattern: new RegExp('...'),
* handler: '...',
* options: {
* cacheName: '...',
* plugins: [..., ...],
* },
* }],
* skipWaiting: ...,
* });
* ```
*
* @memberof module:workbox-webpack-plugin
*/
class GenerateSW {
protected config: GenerateSWConfig;
private alreadyCalled: boolean;
/**
* Creates an instance of GenerateSW.
*/
constructor(config: GenerateSWConfig = {}) {
this.config = config;
this.alreadyCalled = false;
}
/**
* @param {Object} [compiler] default compiler object passed from webpack
*
* @private
*/
propagateWebpackConfig(compiler: webpack.Compiler): void {
// Because this.config is listed last, properties that are already set
// there take precedence over derived properties from the compiler.
this.config = Object.assign(
{
mode: compiler.options.mode,
sourcemap: Boolean(compiler.options.devtool),
},
this.config,
);
}
/**
* @param {Object} [compiler] default compiler object passed from webpack
*
* @private
*/
apply(compiler: webpack.Compiler): void {
this.propagateWebpackConfig(compiler);
// webpack v4/v5 compatibility:
// https://github.com/webpack/webpack/issues/11425#issuecomment-690387207
if (webpack.version.startsWith('4.')) {
compiler.hooks.emit.tapPromise(this.constructor.name, (compilation) =>
this.addAssets(compilation).catch((error) => {
compilation.errors.push(error);
}),
);
} else {
const {PROCESS_ASSETS_STAGE_OPTIMIZE_TRANSFER} = webpack.Compilation;
// Specifically hook into thisCompilation, as per
// https://github.com/webpack/webpack/issues/11425#issuecomment-690547848
compiler.hooks.thisCompilation.tap(
this.constructor.name,
(compilation) => {
compilation.hooks.processAssets.tapPromise(
{
name: this.constructor.name,
// TODO(jeffposnick): This may need to change eventually.
// See https://github.com/webpack/webpack/issues/11822#issuecomment-726184972
stage: PROCESS_ASSETS_STAGE_OPTIMIZE_TRANSFER - 10,
},
() =>
this.addAssets(compilation).catch(
(error: webpack.WebpackError) => {
compilation.errors.push(error);
},
),
);
},
);
}
}
/**
* @param {Object} compilation The webpack compilation.
*
* @private
*/
async addAssets(compilation: webpack.Compilation): Promise<void> {
// See https://github.com/GoogleChrome/workbox/issues/1790
if (this.alreadyCalled) {
const warningMessage =
`${this.constructor.name} has been called ` +
`multiple times, perhaps due to running webpack in --watch mode. The ` +
`precache manifest generated after the first call may be inaccurate! ` +
`Please see https://github.com/GoogleChrome/workbox/issues/1790 for ` +
`more information.`;
if (
!compilation.warnings.some(
(warning) =>
warning instanceof Error && warning.message === warningMessage,
)
) {
compilation.warnings.push(
Error(warningMessage) as webpack.WebpackError,
);
}
} else {
this.alreadyCalled = true;
}
let config: GenerateSWConfig = {};
try {
// emit might be called multiple times; instead of modifying this.config,
// use a validated copy.
// See https://github.com/GoogleChrome/workbox/issues/2158
config = validateWebpackGenerateSWOptions(this.config);
} catch (error) {
if (error instanceof Error) {
throw new Error(
`Please check your ${this.constructor.name} plugin ` +
`configuration:\n${error.message}`,
);
}
}
// Ensure that we don't precache any of the assets generated by *any*
// instance of this plugin.
// eslint-disable-next-line @typescript-eslint/no-unsafe-member-access
config.exclude!.push(({asset}) => _generatedAssetNames.has(asset.name));
if (config.importScriptsViaChunks) {
// Anything loaded via importScripts() is implicitly cached by the service
// worker, and should not be added to the precache manifest.
config.excludeChunks = (config.excludeChunks || []).concat(
config.importScriptsViaChunks,
);
const scripts = getScriptFilesForChunks(
compilation,
config.importScriptsViaChunks,
);
config.importScripts = (config.importScripts || []).concat(scripts);
}
const {size, sortedEntries} = await getManifestEntriesFromCompilation(
compilation,
config,
);
config.manifestEntries = sortedEntries;
const unbundledCode = populateSWTemplate(config);
const files = await bundle({
babelPresetEnvTargets: config.babelPresetEnvTargets,
inlineWorkboxRuntime: config.inlineWorkboxRuntime,
mode: config.mode,
sourcemap: config.sourcemap,
swDest: relativeToOutputPath(compilation, config.swDest!),
unbundledCode,
});
for (const file of files) {
compilation.emitAsset(
file.name,
new RawSource(Buffer.from(file.contents)),
{
// See https://github.com/webpack-contrib/compression-webpack-plugin/issues/218#issuecomment-726196160
minimized: config.mode === 'production',
},
);
_generatedAssetNames.add(file.name);
}
if (compilation.getLogger) {
const logger = compilation.getLogger(this.constructor.name);
logger.info(`The service worker at ${config.swDest ?? ''} will precache
${config.manifestEntries.length} URLs, totaling ${prettyBytes(size)}.`);
}
}
}
export {GenerateSW};

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/*
Copyright 2018 Google LLC
Use of this source code is governed by an MIT-style
license that can be found in the LICENSE file or at
https://opensource.org/licenses/MIT.
*/
import {GenerateSW, GenerateSWConfig} from './generate-sw';
import {InjectManifest} from './inject-manifest';
/**
* @module workbox-webpack-plugin
*/
export {GenerateSW, GenerateSWConfig, InjectManifest};
// TODO: remove this in v7.
// See https://github.com/GoogleChrome/workbox/issues/3033
export default {GenerateSW, InjectManifest};

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/*
Copyright 2018 Google LLC
Use of this source code is governed by an MIT-style
license that can be found in the LICENSE file or at
https://opensource.org/licenses/MIT.
*/
import {escapeRegExp} from 'workbox-build/build/lib/escape-regexp';
import {replaceAndUpdateSourceMap} from 'workbox-build/build/lib/replace-and-update-source-map';
import {validateWebpackInjectManifestOptions} from 'workbox-build/build/lib/validate-options';
import prettyBytes from 'pretty-bytes';
import stringify from 'fast-json-stable-stringify';
import upath from 'upath';
import webpack from 'webpack';
import {getManifestEntriesFromCompilation} from './lib/get-manifest-entries-from-compilation';
import {getSourcemapAssetName} from './lib/get-sourcemap-asset-name';
import {relativeToOutputPath} from './lib/relative-to-output-path';
import {WebpackInjectManifestOptions} from 'workbox-build';
// Used to keep track of swDest files written by *any* instance of this plugin.
// See https://github.com/GoogleChrome/workbox/issues/2181
const _generatedAssetNames = new Set<string>();
// SingleEntryPlugin in v4 was renamed to EntryPlugin in v5.
const SingleEntryPlugin = webpack.EntryPlugin || webpack.SingleEntryPlugin;
// webpack v4/v5 compatibility:
// https://github.com/webpack/webpack/issues/11425#issuecomment-686607633
const {RawSource} = webpack.sources || require('webpack-sources');
/**
* This class supports compiling a service worker file provided via `swSrc`,
* and injecting into that service worker a list of URLs and revision
* information for precaching based on the webpack asset pipeline.
*
* Use an instance of `InjectManifest` in the
* [`plugins` array](https://webpack.js.org/concepts/plugins/#usage) of a
* webpack config.
*
* In addition to injecting the manifest, this plugin will perform a compilation
* of the `swSrc` file, using the options from the main webpack configuration.
*
* ```
* // The following lists some common options; see the rest of the documentation
* // for the full set of options and defaults.
* new InjectManifest({
* exclude: [/.../, '...'],
* maximumFileSizeToCacheInBytes: ...,
* swSrc: '...',
* });
* ```
*
* @memberof module:workbox-webpack-plugin
*/
class InjectManifest {
protected config: WebpackInjectManifestOptions;
private alreadyCalled: boolean;
/**
* Creates an instance of InjectManifest.
*/
constructor(config: WebpackInjectManifestOptions) {
this.config = config;
this.alreadyCalled = false;
}
/**
* @param {Object} [compiler] default compiler object passed from webpack
*
* @private
*/
propagateWebpackConfig(compiler: webpack.Compiler): void {
// Because this.config is listed last, properties that are already set
// there take precedence over derived properties from the compiler.
this.config = Object.assign(
{
mode: compiler.options.mode,
// Use swSrc with a hardcoded .js extension, in case swSrc is a .ts file.
swDest: upath.parse(this.config.swSrc).name + '.js',
},
this.config,
);
}
/**
* @param {Object} [compiler] default compiler object passed from webpack
*
* @private
*/
apply(compiler: webpack.Compiler): void {
this.propagateWebpackConfig(compiler);
compiler.hooks.make.tapPromise(this.constructor.name, (compilation) =>
this.handleMake(compilation, compiler).catch(
(error: webpack.WebpackError) => {
compilation.errors.push(error);
},
),
);
// webpack v4/v5 compatibility:
// https://github.com/webpack/webpack/issues/11425#issuecomment-690387207
if (webpack.version?.startsWith('4.')) {
compiler.hooks.emit.tapPromise(this.constructor.name, (compilation) =>
this.addAssets(compilation).catch((error: webpack.WebpackError) => {
compilation.errors.push(error);
}),
);
} else {
const {PROCESS_ASSETS_STAGE_OPTIMIZE_TRANSFER} = webpack.Compilation;
// Specifically hook into thisCompilation, as per
// https://github.com/webpack/webpack/issues/11425#issuecomment-690547848
compiler.hooks.thisCompilation.tap(
this.constructor.name,
(compilation) => {
compilation.hooks.processAssets.tapPromise(
{
name: this.constructor.name,
// TODO(jeffposnick): This may need to change eventually.
// See https://github.com/webpack/webpack/issues/11822#issuecomment-726184972
stage: PROCESS_ASSETS_STAGE_OPTIMIZE_TRANSFER - 10,
},
() =>
this.addAssets(compilation).catch(
(error: webpack.WebpackError) => {
compilation.errors.push(error);
},
),
);
},
);
}
}
/**
* @param {Object} compilation The webpack compilation.
* @param {Object} parentCompiler The webpack parent compiler.
*
* @private
*/
async performChildCompilation(
compilation: webpack.Compilation,
parentCompiler: webpack.Compiler,
): Promise<void> {
const outputOptions = {
path: parentCompiler.options.output.path,
filename: this.config.swDest,
};
const childCompiler = compilation.createChildCompiler(
this.constructor.name,
outputOptions,
[],
);
childCompiler.context = parentCompiler.context;
childCompiler.inputFileSystem = parentCompiler.inputFileSystem;
childCompiler.outputFileSystem = parentCompiler.outputFileSystem;
if (Array.isArray(this.config.webpackCompilationPlugins)) {
for (const plugin of this.config.webpackCompilationPlugins) {
// plugin has a generic type, eslint complains for an unsafe
// assign and unsafe use
// eslint-disable-next-line
plugin.apply(childCompiler);
}
}
new SingleEntryPlugin(
parentCompiler.context,
this.config.swSrc,
this.constructor.name,
).apply(childCompiler);
await new Promise<void>((resolve, reject) => {
childCompiler.runAsChild((error, _entries, childCompilation) => {
if (error) {
reject(error);
} else {
compilation.warnings = compilation.warnings.concat(
childCompilation?.warnings ?? [],
);
compilation.errors = compilation.errors.concat(
childCompilation?.errors ?? [],
);
resolve();
}
});
});
}
/**
* @param {Object} compilation The webpack compilation.
* @param {Object} parentCompiler The webpack parent compiler.
*
* @private
*/
addSrcToAssets(
compilation: webpack.Compilation,
parentCompiler: webpack.Compiler,
): void {
// eslint-disable-next-line
const source = (parentCompiler.inputFileSystem as any).readFileSync(
this.config.swSrc,
);
compilation.emitAsset(this.config.swDest!, new RawSource(source));
}
/**
* @param {Object} compilation The webpack compilation.
* @param {Object} parentCompiler The webpack parent compiler.
*
* @private
*/
async handleMake(
compilation: webpack.Compilation,
parentCompiler: webpack.Compiler,
): Promise<void> {
try {
this.config = validateWebpackInjectManifestOptions(this.config);
} catch (error) {
if (error instanceof Error) {
throw new Error(
`Please check your ${this.constructor.name} plugin ` +
`configuration:\n${error.message}`,
);
}
}
this.config.swDest = relativeToOutputPath(compilation, this.config.swDest!);
_generatedAssetNames.add(this.config.swDest);
if (this.config.compileSrc) {
await this.performChildCompilation(compilation, parentCompiler);
} else {
this.addSrcToAssets(compilation, parentCompiler);
// This used to be a fatal error, but just warn at runtime because we
// can't validate it easily.
if (
Array.isArray(this.config.webpackCompilationPlugins) &&
this.config.webpackCompilationPlugins.length > 0
) {
compilation.warnings.push(
new Error(
'compileSrc is false, so the ' +
'webpackCompilationPlugins option will be ignored.',
) as webpack.WebpackError,
);
}
}
}
/**
* @param {Object} compilation The webpack compilation.
*
* @private
*/
async addAssets(compilation: webpack.Compilation): Promise<void> {
// See https://github.com/GoogleChrome/workbox/issues/1790
if (this.alreadyCalled) {
const warningMessage =
`${this.constructor.name} has been called ` +
`multiple times, perhaps due to running webpack in --watch mode. The ` +
`precache manifest generated after the first call may be inaccurate! ` +
`Please see https://github.com/GoogleChrome/workbox/issues/1790 for ` +
`more information.`;
if (
!compilation.warnings.some(
(warning) =>
warning instanceof Error && warning.message === warningMessage,
)
) {
compilation.warnings.push(
new Error(warningMessage) as webpack.WebpackError,
);
}
} else {
this.alreadyCalled = true;
}
const config = Object.assign({}, this.config);
// Ensure that we don't precache any of the assets generated by *any*
// instance of this plugin.
// eslint-disable-next-line @typescript-eslint/no-unsafe-member-access
config.exclude!.push(({asset}) => _generatedAssetNames.has(asset.name));
// See https://webpack.js.org/contribute/plugin-patterns/#monitoring-the-watch-graph
const absoluteSwSrc = upath.resolve(this.config.swSrc);
compilation.fileDependencies.add(absoluteSwSrc);
const swAsset = compilation.getAsset(config.swDest!);
const swAssetString = swAsset!.source.source().toString();
const globalRegexp = new RegExp(escapeRegExp(config.injectionPoint!), 'g');
const injectionResults = swAssetString.match(globalRegexp);
if (!injectionResults) {
throw new Error(
`Can't find ${config.injectionPoint ?? ''} in your SW source.`,
);
}
if (injectionResults.length !== 1) {
throw new Error(
`Multiple instances of ${config.injectionPoint ?? ''} were ` +
`found in your SW source. Include it only once. For more info, see ` +
`https://github.com/GoogleChrome/workbox/issues/2681`,
);
}
const {size, sortedEntries} = await getManifestEntriesFromCompilation(
compilation,
config,
);
let manifestString = stringify(sortedEntries);
if (
this.config.compileSrc &&
// See https://github.com/GoogleChrome/workbox/issues/2729
!(
compilation.options?.devtool === 'eval-cheap-source-map' &&
compilation.options.optimization?.minimize
)
) {
// See https://github.com/GoogleChrome/workbox/issues/2263
manifestString = manifestString.replace(/"/g, `'`);
}
const sourcemapAssetName = getSourcemapAssetName(
compilation,
swAssetString,
config.swDest!,
);
if (sourcemapAssetName) {
_generatedAssetNames.add(sourcemapAssetName);
const sourcemapAsset = compilation.getAsset(sourcemapAssetName);
const {source, map} = await replaceAndUpdateSourceMap({
jsFilename: config.swDest!,
// eslint-disable-next-line @typescript-eslint/no-unsafe-assignment
originalMap: JSON.parse(sourcemapAsset!.source.source().toString()),
originalSource: swAssetString,
replaceString: manifestString,
searchString: config.injectionPoint!,
});
compilation.updateAsset(sourcemapAssetName, new RawSource(map));
compilation.updateAsset(config.swDest!, new RawSource(source));
} else {
// If there's no sourcemap associated with swDest, a simple string
// replacement will suffice.
compilation.updateAsset(
config.swDest!,
new RawSource(
swAssetString.replace(config.injectionPoint!, manifestString),
),
);
}
if (compilation.getLogger) {
const logger = compilation.getLogger(this.constructor.name);
logger.info(`The service worker at ${config.swDest ?? ''} will precache
${sortedEntries.length} URLs, totaling ${prettyBytes(size)}.`);
}
}
}
export {InjectManifest};

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{
"extends": "../../tsconfig",
"compilerOptions": {
"esModuleInterop": true,
"module": "CommonJS",
"outDir": "./build",
"resolveJsonModule": true,
"rootDir": "./src",
"target": "ES2018",
"tsBuildInfoFile": "./tsconfig.tsbuildinfo"
},
"include": ["src/**/*.ts"],
"references": [{"path": "../workbox-build/"}]
}

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