@aws-cdk/core
Version:
AWS Cloud Development Kit Core Library
94 lines • 14.1 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
const cxapi = require("@aws-cdk/cx-api");
const construct_1 = require("./construct");
const runtime_info_1 = require("./private/runtime-info");
const tree_metadata_1 = require("./private/tree-metadata");
const APP_SYMBOL = Symbol.for('@aws-cdk/core.App');
/**
* A construct which represents an entire CDK app. This construct is normally
* the root of the construct tree.
*
* You would normally define an `App` instance in your program's entrypoint,
* then define constructs where the app is used as the parent scope.
*
* After all the child constructs are defined within the app, you should call
* `app.synth()` which will emit a "cloud assembly" from this app into the
* directory specified by `outdir`. Cloud assemblies includes artifacts such as
* CloudFormation templates and assets that are needed to deploy this app into
* the AWS cloud.
*
* @see https://docs.aws.amazon.com/cdk/latest/guide/apps_and_stacks.html
*/
class App extends construct_1.Construct {
/**
* Initializes a CDK application.
* @param props initialization properties
*/
constructor(props = {}) {
super(undefined, '');
Object.defineProperty(this, APP_SYMBOL, { value: true });
this.loadContext(props.context);
if (props.stackTraces === false) {
this.node.setContext(cxapi.DISABLE_METADATA_STACK_TRACE, true);
}
if (props.runtimeInfo === false) {
this.node.setContext(cxapi.DISABLE_VERSION_REPORTING, true);
}
// both are reverse logic
this.runtimeInfo = this.node.tryGetContext(cxapi.DISABLE_VERSION_REPORTING) ? false : true;
this.outdir = props.outdir || process.env[cxapi.OUTDIR_ENV];
const autoSynth = props.autoSynth !== undefined ? props.autoSynth : cxapi.OUTDIR_ENV in process.env;
if (autoSynth) {
// synth() guarantuees it will only execute once, so a default of 'true'
// doesn't bite manual calling of the function.
process.once('beforeExit', () => this.synth());
}
if (props.treeMetadata === undefined || props.treeMetadata) {
new tree_metadata_1.TreeMetadata(this);
}
}
/**
* Checks if an object is an instance of the `App` class.
* @returns `true` if `obj` is an `App`.
* @param obj The object to evaluate
*/
static isApp(obj) {
return APP_SYMBOL in obj;
}
/**
* Synthesizes a cloud assembly for this app. Emits it to the directory
* specified by `outdir`.
*
* @returns a `CloudAssembly` which can be used to inspect synthesized
* artifacts such as CloudFormation templates and assets.
*/
synth() {
// we already have a cloud assembly, no-op for you
if (this._assembly) {
return this._assembly;
}
const assembly = construct_1.ConstructNode.synth(this.node, {
outdir: this.outdir,
runtimeInfo: this.runtimeInfo ? runtime_info_1.collectRuntimeInformation() : undefined
});
this._assembly = assembly;
return assembly;
}
loadContext(defaults = {}) {
// prime with defaults passed through constructor
for (const [k, v] of Object.entries(defaults)) {
this.node.setContext(k, v);
}
// read from environment
const contextJson = process.env[cxapi.CONTEXT_ENV];
const contextFromEnvironment = contextJson
? JSON.parse(contextJson)
: {};
for (const [k, v] of Object.entries(contextFromEnvironment)) {
this.node.setContext(k, v);
}
}
}
exports.App = App;
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Note that\n   * this feature is only available for certain programming languages, and\n   * calling `synth()` is still recommended.\n   *\n   * @default true if running via CDK CLI (`CDK_OUTDIR` is set), `false`\n   * otherwise\n   */\n  readonly autoSynth?: boolean;\n\n  /**\n   * The output directory into which to emit synthesized artifacts.\n   *\n   * @default - If this value is _not_ set, considers the environment variable `CDK_OUTDIR`.\n   *            If `CDK_OUTDIR` is not defined, uses a temp directory.\n   */\n  readonly outdir?: string;\n\n  /**\n   * Include construct creation stack trace in the `aws:cdk:trace` metadata key of all constructs.\n   * @default true stack traces are included unless `aws:cdk:disable-stack-trace` is set in the context.\n   */\n  readonly stackTraces?: boolean;\n\n  /**\n   * Include runtime versioning information in cloud assembly manifest\n   * @default true runtime info is included unless `aws:cdk:disable-runtime-info` is set in the context.\n   */\n  readonly runtimeInfo?: boolean;\n\n  /**\n   * Additional context values for the application.\n   *\n   * Context can be read from any construct using `node.getContext(key)`.\n   *\n   * @default - no additional context\n   */\n  readonly context?: { [key: string]: string };\n\n  /**\n   * Include construct tree metadata as part of the Cloud Assembly.\n   *\n   * @default true\n   */\n  readonly treeMetadata?: boolean;\n}\n\n/**\n * A construct which represents an entire CDK app. This construct is normally\n * the root of the construct tree.\n *\n * You would normally define an `App` instance in your program's entrypoint,\n * then define constructs where the app is used as the parent scope.\n *\n * After all the child constructs are defined within the app, you should call\n * `app.synth()` which will emit a \"cloud assembly\" from this app into the\n * directory specified by `outdir`. Cloud assemblies includes artifacts such as\n * CloudFormation templates and assets that are needed to deploy this app into\n * the AWS cloud.\n *\n * @see https://docs.aws.amazon.com/cdk/latest/guide/apps_and_stacks.html\n */\nexport class App extends Construct {\n\n  /**\n   * Checks if an object is an instance of the `App` class.\n   * @returns `true` if `obj` is an `App`.\n   * @param obj The object to evaluate\n   */\n  public static isApp(obj: any): obj is App {\n    return APP_SYMBOL in obj;\n  }\n\n  private _assembly?: CloudAssembly;\n  private readonly runtimeInfo: boolean;\n  private readonly outdir?: string;\n\n  /**\n   * Initializes a CDK application.\n   * @param props initialization properties\n   */\n  constructor(props: AppProps = {}) {\n    super(undefined as any, '');\n\n    Object.defineProperty(this, APP_SYMBOL, { value: true });\n\n    this.loadContext(props.context);\n\n    if (props.stackTraces === false) {\n      this.node.setContext(cxapi.DISABLE_METADATA_STACK_TRACE, true);\n    }\n\n    if (props.runtimeInfo === false) {\n      this.node.setContext(cxapi.DISABLE_VERSION_REPORTING, true);\n    }\n\n    // both are reverse logic\n    this.runtimeInfo = this.node.tryGetContext(cxapi.DISABLE_VERSION_REPORTING) ? false : true;\n    this.outdir = props.outdir || process.env[cxapi.OUTDIR_ENV];\n\n    const autoSynth = props.autoSynth !== undefined ? props.autoSynth : cxapi.OUTDIR_ENV in process.env;\n    if (autoSynth) {\n      // synth() guarantuees it will only execute once, so a default of 'true'\n      // doesn't bite manual calling of the function.\n      process.once('beforeExit', () => this.synth());\n    }\n\n    if (props.treeMetadata === undefined || props.treeMetadata) {\n      new TreeMetadata(this);\n    }\n  }\n\n  /**\n   * Synthesizes a cloud assembly for this app. Emits it to the directory\n   * specified by `outdir`.\n   *\n   * @returns a `CloudAssembly` which can be used to inspect synthesized\n   * artifacts such as CloudFormation templates and assets.\n   */\n  public synth(): CloudAssembly {\n    // we already have a cloud assembly, no-op for you\n    if (this._assembly) {\n      return this._assembly;\n    }\n\n    const assembly = ConstructNode.synth(this.node, {\n      outdir: this.outdir,\n      runtimeInfo: this.runtimeInfo ? collectRuntimeInformation() : undefined\n    });\n\n    this._assembly = assembly;\n    return assembly;\n  }\n\n  private loadContext(defaults: { [key: string]: string } = { }) {\n    // prime with defaults passed through constructor\n    for (const [ k, v ] of Object.entries(defaults)) {\n      this.node.setContext(k, v);\n    }\n\n    // read from environment\n    const contextJson = process.env[cxapi.CONTEXT_ENV];\n    const contextFromEnvironment = contextJson\n      ? JSON.parse(contextJson)\n      : { };\n\n    for (const [ k, v ] of Object.entries(contextFromEnvironment)) {\n      this.node.setContext(k, v);\n    }\n  }\n}\n"]}