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fix(bazel): workaround problem reading summary files from node_modules (#29459) 

PR Close #29459
This commit is contained in:
Alex Eagle 2019-03-21 17:06:52 -07:00 committed by Miško Hevery
parent 21be0fb926
commit 769d960db1
1 changed files with 25 additions and 0 deletions
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25
packages/bazel/src/ngc-wrapped/index.ts
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@ -311,6 +311,31 @@ export function compile({allDepsCompiledWithBazel = true, compilerOpts, tsHost,
// File does not exist or parse error. Ignore this case and continue onto the
// other methods of resolving the module below.
}
// It can happen that the ViewEngine compiler needs to write an import in a factory file,
// and is using an ngsummary file to get the symbols.
// The ngsummary comes from an upstream ng_module rule.
// The upstream rule based its imports on ngsummary file which was generated from a
// metadata.json file that was published to npm in an Angular library.
// However, the ngsummary doesn't propagate the 'importAs' from the original metadata.json
// so we would normally not be able to supply the correct module name for it.
// For example, if the rootDir-relative filePath is
// node_modules/@angular/material/toolbar/typings/index
// we would supply a module name
// @angular/material/toolbar/typings/index
// but there is no JavaScript file to load at this path.
// This is a workaround for https://github.com/angular/angular/issues/29454
if (importedFilePath.indexOf('node_modules') >= 0) {
const maybeMetadataFile = importedFilePath.replace(EXT, '') + '.metadata.json';
if (fs.existsSync(maybeMetadataFile)) {
const moduleName =
JSON.parse(fs.readFileSync(maybeMetadataFile, {encoding: 'utf-8'})).importAs;
if (moduleName) {
return moduleName;
}
}
}
if ((compilerOpts.module === ts.ModuleKind.UMD || compilerOpts.module === ts.ModuleKind.AMD) &&
ngHost.amdModuleName) {
return ngHost.amdModuleName({ fileName: importedFilePath } as ts.SourceFile);