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merge_with_preprocessor_map() — svelte Function Reference

Architecture documentation for the merge_with_preprocessor_map() function in mapped_code.js from the svelte codebase.

Function javascript Compiler Migrator calls 3 called by 2

Entity Profile

Dependency Diagram

graph TD
  cbb1ee69_356b_2015_1118_b75b5cb5088f["merge_with_preprocessor_map()"]
  d383a41d_5383_ee86_cab6_03bf1a2daf93["mapped_code.js"]
  cbb1ee69_356b_2015_1118_b75b5cb5088f -->|defined in| d383a41d_5383_ee86_cab6_03bf1a2daf93
  1129e6de_ad88_9249_cdc1_424cf9bba55e["render_stylesheet()"]
  1129e6de_ad88_9249_cdc1_424cf9bba55e -->|calls| cbb1ee69_356b_2015_1118_b75b5cb5088f
  0accce76_056a_b49e_69ca_069fe7e3e216["transform_component()"]
  0accce76_056a_b49e_69ca_069fe7e3e216 -->|calls| cbb1ee69_356b_2015_1118_b75b5cb5088f
  fee21348_d647_ae03_a75d_4957b319966c["get_basename()"]
  cbb1ee69_356b_2015_1118_b75b5cb5088f -->|calls| fee21348_d647_ae03_a75d_4957b319966c
  75dd917c_6b23_2b41_3ed7_e5aa56348c12["apply_preprocessor_sourcemap()"]
  cbb1ee69_356b_2015_1118_b75b5cb5088f -->|calls| 75dd917c_6b23_2b41_3ed7_e5aa56348c12
  83e8a17c_7a83_f4d3_1629_6a92427d44f2["get_relative_path()"]
  cbb1ee69_356b_2015_1118_b75b5cb5088f -->|calls| 83e8a17c_7a83_f4d3_1629_6a92427d44f2
  style cbb1ee69_356b_2015_1118_b75b5cb5088f fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

packages/svelte/src/compiler/utils/mapped_code.js lines 394–417

export function merge_with_preprocessor_map(result, options, source_name) {
	if (options.sourcemap) {
		const file_basename = get_basename(options.filename);
		// The preprocessor map is expected to contain `sources: [basename_of_filename]`, but our own
		// map may contain a different file name. Patch our map beforehand to align sources so merging
		// with the preprocessor map works correctly.
		result.map.sources = [file_basename];
		Object.assign(
			result.map,
			apply_preprocessor_sourcemap(
				file_basename,
				result.map,
				/** @type {any} */ (options.sourcemap)
			)
		);
		// After applying the preprocessor map, we need to do the inverse and make the sources
		// relative to the input file again in case the output code is in a different directory.
		if (file_basename !== source_name) {
			result.map.sources = result.map.sources.map(
				/** @param {string} source */ (source) => get_relative_path(source_name, source)
			);
		}
	}
}

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Frequently Asked Questions

What does merge_with_preprocessor_map() do?
merge_with_preprocessor_map() is a function in the svelte codebase, defined in packages/svelte/src/compiler/utils/mapped_code.js.
Where is merge_with_preprocessor_map() defined?
merge_with_preprocessor_map() is defined in packages/svelte/src/compiler/utils/mapped_code.js at line 394.
What does merge_with_preprocessor_map() call?
merge_with_preprocessor_map() calls 3 function(s): apply_preprocessor_sourcemap, get_basename, get_relative_path.
What calls merge_with_preprocessor_map()?
merge_with_preprocessor_map() is called by 2 function(s): render_stylesheet, transform_component.

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