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refactor(ivy): ngcc - implement abstract FileSystem (#29643)

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This commit introduces a new interface, which abstracts access
to the underlying `FileSystem`. There is initially one concrete
implementation, `NodeJsFileSystem`, which is simply wrapping the
`fs` library of NodeJs.

Going forward, we can provide a `MockFileSystem` for test, which
should allow us to stop using `mock-fs` for most of the unit tests.
We could also implement a `CachedFileSystem` that may improve the
performance of ngcc.

PR Close #29643
This commit is contained in:
Pete Bacon Darwin
2019-04-28 20:47:57 +01:00
committed by Andrew Kushnir
parent 1fd2cc6340
commit 16d7dde2ad
36 changed files with 590 additions and 353 deletions
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11
packages/compiler-cli/ngcc/test/helpers/utils.ts
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@ -15,6 +15,7 @@ import {EntryPointBundle} from '../../src/packages/entry_point_bundle';
export {getDeclaration} from '../../../src/ngtsc/testing/in_memory_typescript';
const _ = AbsoluteFsPath.fromUnchecked;
/**
*
* @param format The format of the bundle.
@ -28,11 +29,7 @@ export function makeTestEntryPointBundle(
const src = makeTestBundleProgram(files);
const dts = dtsFiles ? makeTestBundleProgram(dtsFiles) : null;
const isFlatCore = isCore && src.r3SymbolsFile === null;
return {
formatProperty,
format,
rootDirs: [AbsoluteFsPath.fromUnchecked('/')], src, dts, isCore, isFlatCore
};
return {formatProperty, format, rootDirs: [_('/')], src, dts, isCore, isFlatCore};
}
/**
@ -41,10 +38,10 @@ export function makeTestEntryPointBundle(
*/
export function makeTestBundleProgram(files: {name: string, contents: string}[]): BundleProgram {
const {program, options, host} = makeTestProgramInternal(...files);
const path = files[0].name;
const path = _(files[0].name);
const file = program.getSourceFile(path) !;
const r3SymbolsInfo = files.find(file => file.name.indexOf('r3_symbols') !== -1) || null;
const r3SymbolsPath = r3SymbolsInfo && r3SymbolsInfo.name;
const r3SymbolsPath = r3SymbolsInfo && _(r3SymbolsInfo.name);
const r3SymbolsFile = r3SymbolsPath && program.getSourceFile(r3SymbolsPath) || null;
return {program, options, host, path, file, r3SymbolsPath, r3SymbolsFile};
}