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refactor(ngcc): refactor how info is retrieved from entry-point `package.json` (#37040) 

This commit refactors the way info is retrieved from entry-point
`package.json` files to make it easier to extract more info (such as the
package's name) in the future. It also avoids reading and parsing the
`package.json` file multiple times (as was happening before).

PR Close #37040
This commit is contained in:
George Kalpakas 2020-06-08 22:04:30 +03:00 committed by Misko Hevery
parent 8197557fcf
commit fb10f62efc
1 changed files with 36 additions and 41 deletions
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75
packages/compiler-cli/ngcc/src/packages/entry_point.ts
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@ -69,6 +69,7 @@ export type PackageJsonFormatProperties = keyof PackageJsonFormatPropertiesMap;
*/
export interface EntryPointPackageJson extends JsonObject, PackageJsonFormatPropertiesMap {
name: string;
version?: string;
scripts?: Record<string, string>;
__processed_by_ivy_ngcc__?: Record<string, string>;
}
@ -125,30 +126,31 @@ export function getEntryPointInfo(
fs: FileSystem, config: NgccConfiguration, logger: Logger, packagePath: AbsoluteFsPath,
entryPointPath: AbsoluteFsPath): GetEntryPointResult {
const packageJsonPath = resolve(entryPointPath, 'package.json');
const packageVersion = getPackageVersion(fs, packageJsonPath);
const loadedEntryPointPackageJson = loadPackageJson(fs, packageJsonPath);
const packageVersion = getPackageVersion(loadedEntryPointPackageJson);
const entryPointConfig =
config.getPackageConfig(packagePath, packageVersion).entryPoints[entryPointPath];
const hasConfig = entryPointConfig !== undefined;
let entryPointPackageJson: EntryPointPackageJson;
if (!hasConfig && !fs.exists(packageJsonPath)) {
// No package.json and no config
if (entryPointConfig === undefined) {
if (!fs.exists(packageJsonPath)) {
// No `package.json` and no config.
return NO_ENTRY_POINT;
}
} else if (loadedEntryPointPackageJson === null) {
// `package.json` exists but could not be parsed and there is no redeeming config.
logger.warn(
`Failed to read entry point info from invalid 'package.json' file: ${packageJsonPath}`);
if (hasConfig && entryPointConfig.ignore === true) {
// Explicitly ignored
return IGNORED_ENTRY_POINT;
}
const loadedEntryPointPackageJson = loadEntryPointPackage(fs, logger, packageJsonPath, hasConfig);
const entryPointPackageJson = hasConfig ?
mergeConfigAndPackageJson(
loadedEntryPointPackageJson, entryPointConfig, packagePath, entryPointPath) :
loadedEntryPointPackageJson;
if (entryPointPackageJson === null) {
// package.json exists but could not be parsed and there was no redeeming config
return INCOMPATIBLE_ENTRY_POINT;
} else {
entryPointPackageJson = loadedEntryPointPackageJson;
}
} else if (entryPointConfig.ignore === true) {
// Explicitly ignored entry-point.
return IGNORED_ENTRY_POINT;
} else {
entryPointPackageJson = mergeConfigAndPackageJson(
loadedEntryPointPackageJson, entryPointConfig, packagePath, entryPointPath);
}
const typings = entryPointPackageJson.typings || entryPointPackageJson.types ||
@ -234,20 +236,15 @@ export function getEntryPointFormat(
}
/**
* Parses the JSON from a package.json file.
* @param packageJsonPath the absolute path to the package.json file.
* @returns JSON from the package.json file if it is valid, `null` otherwise.
* Parse the JSON from a `package.json` file.
* @param packageJsonPath the absolute path to the `package.json` file.
* @returns JSON from the `package.json` file if it is valid, `null` otherwise.
*/
function loadEntryPointPackage(
fs: FileSystem, logger: Logger, packageJsonPath: AbsoluteFsPath,
hasConfig: boolean): EntryPointPackageJson|null {
function loadPackageJson(fs: FileSystem, packageJsonPath: AbsoluteFsPath): EntryPointPackageJson|
null {
try {
return JSON.parse(fs.readFile(packageJsonPath));
} catch (e) {
if (!hasConfig) {
// We may have run into a package.json with unexpected symbols
logger.warn(`Failed to read entry point info from ${packageJsonPath} with error ${e}.`);
}
} catch {
return null;
}
}
@ -305,16 +302,14 @@ function guessTypingsFromPackageJson(
/**
* Find the version of the package at `packageJsonPath`.
*
* @returns the version string or `null` if the package.json does not exist or is invalid.
* The version is read off of the `version` property of `packageJson`. It is assumed that even if
* `packageJson` corresponds to a secondary entry-point (e.g. `@angular/common/http`) it will still
* contain the same version as the main package (e.g. `@angular/common`).
*
* @param packageJson the parsed `package.json` of the package or one of its entry-points (if
* available).
* @returns the version string or `null` if the `package.json` is not available.
*/
function getPackageVersion(fs: FileSystem, packageJsonPath: AbsoluteFsPath): string|null {
try {
if (fs.exists(packageJsonPath)) {
const packageJson = JSON.parse(fs.readFile(packageJsonPath));
return packageJson['version'] || null;
}
} catch {
// Do nothing
}
return null;
function getPackageVersion(packageJson: EntryPointPackageJson|null): string|null {
return packageJson?.version ?? null;
}