WIP - add extractor, generate snippet_data

node_modules/webpack-sources/README.md

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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`.
+