refactor(ngcc): move `sourcemaps` into `ngtsc` (#37114)

The `SourceFile` and associated code is general and reusable in
other projects (such as `@angular/localize`). Moving it to `ngtsc`
makes it more easily shared.

PR Close #37114

packages/compiler-cli/ngcc/BUILD.bazel

@@ -25,6 +25,7 @@ ts_library(
         "//packages/compiler-cli/src/ngtsc/perf",
         "//packages/compiler-cli/src/ngtsc/reflection",
         "//packages/compiler-cli/src/ngtsc/scope",
+        "//packages/compiler-cli/src/ngtsc/sourcemaps",
         "//packages/compiler-cli/src/ngtsc/transform",
         "//packages/compiler-cli/src/ngtsc/translator",
         "//packages/compiler-cli/src/ngtsc/util",
@@ -36,8 +37,6 @@ ts_library(
         "@npm//dependency-graph",
         "@npm//magic-string",
         "@npm//semver",
-        "@npm//source-map",
-        "@npm//sourcemap-codec",
         "@npm//typescript",
     ],
 )

packages/compiler-cli/ngcc/src/rendering/source_maps.ts

@@ -11,8 +11,7 @@ import * as ts from 'typescript';
 
 import {absoluteFrom, absoluteFromSourceFile, basename, FileSystem} from '../../../src/ngtsc/file_system';
 import {Logger} from '../../../src/ngtsc/logging';
-import {RawSourceMap} from '../sourcemaps/raw_source_map';
+import {RawSourceMap, SourceFileLoader} from '../../../src/ngtsc/sourcemaps';
-import {SourceFileLoader} from '../sourcemaps/source_file_loader';
 
 import {FileToWrite} from './utils';
 

packages/compiler-cli/src/ngtsc/sourcemaps/BUILD.bazel

@@ -0,0 +1,18 @@
+load("//tools:defaults.bzl", "ts_library")
+
+package(default_visibility = ["//visibility:public"])
+
+ts_library(
+    name = "sourcemaps",
+    srcs = ["index.ts"] + glob([
+        "src/**/*.ts",
+    ]),
+    deps = [
+        "//packages/compiler-cli/src/ngtsc/file_system",
+        "//packages/compiler-cli/src/ngtsc/logging",
+        "@npm//@types/convert-source-map",
+        "@npm//@types/node",
+        "@npm//source-map",
+        "@npm//sourcemap-codec",
+    ],
+)

packages/compiler-cli/src/ngtsc/sourcemaps/README.md

@@ -0,0 +1,3 @@
+# Source-map handling
+
+Here there are classes for loading and merging source-maps.

packages/compiler-cli/src/ngtsc/sourcemaps/index.ts

@@ -0,0 +1,10 @@
+/**
+ * @license
+ * Copyright Google LLC All Rights Reserved.
+ *
+ * Use of this source code is governed by an MIT-style license that can be
+ * found in the LICENSE file at https://angular.io/license
+ */
+export {RawSourceMap} from './src/raw_source_map';
+export {Mapping, SourceFile} from './src/source_file';
+export {SourceFileLoader} from './src/source_file_loader';

packages/compiler-cli/src/ngtsc/sourcemaps/src/source_file.ts

@@ -8,7 +8,7 @@
 import {removeComments, removeMapFileComments} from 'convert-source-map';
 import {decode, encode, SourceMapMappings, SourceMapSegment} from 'sourcemap-codec';
 
-import {AbsoluteFsPath, dirname, relative} from '../../../src/ngtsc/file_system';
+import {AbsoluteFsPath, dirname, relative} from '../../file_system';
 
 import {RawSourceMap} from './raw_source_map';
 import {compareSegments, offsetSegment, SegmentMarker} from './segment_marker';

packages/compiler-cli/src/ngtsc/sourcemaps/src/source_file_loader.ts

@@ -7,8 +7,8 @@
  */
 import {commentRegex, fromComment, mapFileCommentRegex} from 'convert-source-map';
 
-import {absoluteFrom, AbsoluteFsPath, FileSystem} from '../../../src/ngtsc/file_system';
+import {absoluteFrom, AbsoluteFsPath, FileSystem} from '../../file_system';
-import {Logger} from '../../../src/ngtsc/logging';
+import {Logger} from '../../logging';
 
 import {RawSourceMap} from './raw_source_map';
 import {SourceFile} from './source_file';

packages/compiler-cli/src/ngtsc/sourcemaps/test/BUILD.bazel

@@ -0,0 +1,28 @@
+load("//tools:defaults.bzl", "jasmine_node_test", "ts_library")
+
+package(default_visibility = ["//visibility:public"])
+
+ts_library(
+    name = "test_lib",
+    testonly = True,
+    srcs = glob([
+        "**/*.ts",
+    ]),
+    deps = [
+        "//packages/compiler-cli/src/ngtsc/file_system",
+        "//packages/compiler-cli/src/ngtsc/file_system/testing",
+        "//packages/compiler-cli/src/ngtsc/logging/testing",
+        "//packages/compiler-cli/src/ngtsc/sourcemaps",
+        "@npm//@types/convert-source-map",
+        "@npm//convert-source-map",
+        "@npm//sourcemap-codec",
+    ],
+)
+
+jasmine_node_test(
+    name = "test",
+    bootstrap = ["//tools/testing:node_no_angular_es5"],
+    deps = [
+        ":test_lib",
+    ],
+)

packages/compiler-cli/src/ngtsc/sourcemaps/test/segment_marker_spec.ts

@@ -5,8 +5,8 @@
  * Use of this source code is governed by an MIT-style license that can be
  * found in the LICENSE file at https://angular.io/license
  */
-import {compareSegments, offsetSegment} from '../../src/sourcemaps/segment_marker';
+import {compareSegments, offsetSegment} from '../src/segment_marker';
-import {computeStartOfLinePositions} from '../../src/sourcemaps/source_file';
+import {computeStartOfLinePositions} from '../src/source_file';
 
 describe('SegmentMarker utils', () => {
   describe('compareSegments()', () => {

packages/compiler-cli/src/ngtsc/sourcemaps/test/source_file_loader_spec.ts

@@ -5,13 +5,13 @@
  * Use of this source code is governed by an MIT-style license that can be
  * found in the LICENSE file at https://angular.io/license
  */
-import {absoluteFrom, FileSystem, getFileSystem} from '@angular/compiler-cli/src/ngtsc/file_system';
 import {fromObject} from 'convert-source-map';
 
-import {runInEachFileSystem} from '../../../src/ngtsc/file_system/testing';
+import {absoluteFrom, FileSystem, getFileSystem} from '../../file_system';
-import {MockLogger} from '../../../src/ngtsc/logging/testing';
+import {runInEachFileSystem} from '../../file_system/testing';
-import {RawSourceMap} from '../../src/sourcemaps/raw_source_map';
+import {MockLogger} from '../../logging/testing';
-import {SourceFileLoader as SourceFileLoader} from '../../src/sourcemaps/source_file_loader';
+import {RawSourceMap} from '../src/raw_source_map';
+import {SourceFileLoader as SourceFileLoader} from '../src/source_file_loader';
 
 runInEachFileSystem(() => {
   describe('SourceFileLoader', () => {

packages/compiler-cli/src/ngtsc/sourcemaps/test/source_file_spec.ts

@@ -7,11 +7,11 @@
  */
 import {encode} from 'sourcemap-codec';
 
-import {absoluteFrom} from '../../../src/ngtsc/file_system';
+import {absoluteFrom} from '../../file_system';
-import {runInEachFileSystem} from '../../../src/ngtsc/file_system/testing';
+import {runInEachFileSystem} from '../../file_system/testing';
-import {RawSourceMap} from '../../src/sourcemaps/raw_source_map';
+import {RawSourceMap} from '../src/raw_source_map';
-import {SegmentMarker} from '../../src/sourcemaps/segment_marker';
+import {SegmentMarker} from '../src/segment_marker';
-import {computeStartOfLinePositions, ensureOriginalSegmentLinks, extractOriginalSegments, findLastMappingIndexBefore, Mapping, parseMappings, SourceFile} from '../../src/sourcemaps/source_file';
+import {computeStartOfLinePositions, ensureOriginalSegmentLinks, extractOriginalSegments, findLastMappingIndexBefore, Mapping, parseMappings, SourceFile} from '../src/source_file';
 
 runInEachFileSystem(() => {
   describe('SourceFile and utilities', () => {