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@aws-cdk/core

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AWS Cloud Development Kit Core Library

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"use strict"; var _a; Object.defineProperty(exports, "__esModule", { value: true }); exports.ContextProvider = void 0; const jsiiDeprecationWarnings = require("../.warnings.jsii.js"); const JSII_RTTI_SYMBOL_1 = Symbol.for("jsii.rtti"); const cxapi = require("@aws-cdk/cx-api"); const constructs_1 = require("constructs"); const annotations_1 = require("./annotations"); const stack_1 = require("./stack"); const token_1 = require("./token"); /** * Base class for the model side of context providers * * Instances of this class communicate with context provider plugins in the 'cdk * toolkit' via context variables (input), outputting specialized queries for * more context variables (output). * * ContextProvider needs access to a Construct to hook into the context mechanism. * */ class ContextProvider { constructor() { } /** * @returns the context key or undefined if a key cannot be rendered (due to tokens used in any of the props) */ static getKey(scope, options) { try { jsiiDeprecationWarnings._aws_cdk_core_GetContextKeyOptions(options); } catch (error) { if (process.env.JSII_DEBUG !== "1" && error.name === "DeprecationError") { Error.captureStackTrace(error, this.getKey); } throw error; } const stack = stack_1.Stack.of(scope); const props = options.includeEnvironment ?? true ? { account: stack.account, region: stack.region, ...options.props } : (options.props ?? {}); if (Object.values(props).find(x => token_1.Token.isUnresolved(x))) { throw new Error(`Cannot determine scope for context provider ${options.provider}.\n` + 'This usually happens when one or more of the provider props have unresolved tokens'); } const propStrings = propsToArray(props); return { key: `${options.provider}:${propStrings.join(':')}`, props, }; } static getValue(scope, options) { try { jsiiDeprecationWarnings._aws_cdk_core_GetContextValueOptions(options); } catch (error) { if (process.env.JSII_DEBUG !== "1" && error.name === "DeprecationError") { Error.captureStackTrace(error, this.getValue); } throw error; } const stack = stack_1.Stack.of(scope); if (token_1.Token.isUnresolved(stack.account) || token_1.Token.isUnresolved(stack.region)) { throw new Error(`Cannot retrieve value from context provider ${options.provider} since account/region ` + 'are not specified at the stack level. Configure "env" with an account and region when ' + 'you define your stack.' + 'See https://docs.aws.amazon.com/cdk/latest/guide/environments.html for more details.'); } const { key, props } = this.getKey(scope, options); const value = constructs_1.Node.of(scope).tryGetContext(key); const providerError = extractProviderError(value); // if context is missing or an error occurred during context retrieval, // report and return a dummy value. if (value === undefined || providerError !== undefined) { stack.reportMissingContextKey({ key, provider: options.provider, props: props, }); if (providerError !== undefined) { annotations_1.Annotations.of(scope).addError(providerError); } return { value: options.dummyValue }; } return { value }; } } exports.ContextProvider = ContextProvider; _a = JSII_RTTI_SYMBOL_1; ContextProvider[_a] = { fqn: "@aws-cdk/core.ContextProvider", version: "1.204.0" }; /** * If the context value represents an error, return the error message */ function extractProviderError(value) { if (typeof value === 'object' && value !== null) { return value[cxapi.PROVIDER_ERROR_KEY]; 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This should be a dummy value that should preferably\n   * fail during deployment since it represents an invalid state.\n   */\n  readonly dummyValue: any;\n}\n\n/**\n */\nexport interface GetContextKeyResult {\n  readonly key: string;\n  readonly props: { [key: string]: any };\n}\n\n/**\n */\nexport interface GetContextValueResult {\n  readonly value?: any;\n}\n\n/**\n * Base class for the model side of context providers\n *\n * Instances of this class communicate with context provider plugins in the 'cdk\n * toolkit' via context variables (input), outputting specialized queries for\n * more context variables (output).\n *\n * ContextProvider needs access to a Construct to hook into the context mechanism.\n *\n */\nexport class ContextProvider {\n  /**\n   * @returns the context key or undefined if a key cannot be rendered (due to tokens used in any of the props)\n   */\n  public static getKey(scope: Construct, options: GetContextKeyOptions): GetContextKeyResult {\n    const stack = Stack.of(scope);\n\n    const props = options.includeEnvironment ?? true\n      ? { account: stack.account, region: stack.region, ...options.props }\n      : (options.props ?? {});\n\n    if (Object.values(props).find(x => Token.isUnresolved(x))) {\n      throw new Error(\n        `Cannot determine scope for context provider ${options.provider}.\\n` +\n        'This usually happens when one or more of the provider props have unresolved tokens');\n    }\n\n    const propStrings = propsToArray(props);\n    return {\n      key: `${options.provider}:${propStrings.join(':')}`,\n      props,\n    };\n  }\n\n  public static getValue(scope: Construct, options: GetContextValueOptions): GetContextValueResult {\n    const stack = Stack.of(scope);\n\n    if (Token.isUnresolved(stack.account) || Token.isUnresolved(stack.region)) {\n      throw new Error(`Cannot retrieve value from context provider ${options.provider} since account/region ` +\n                      'are not specified at the stack level. Configure \"env\" with an account and region when ' +\n                      'you define your stack.' +\n                      'See https://docs.aws.amazon.com/cdk/latest/guide/environments.html for more details.');\n    }\n\n    const { key, props } = this.getKey(scope, options);\n    const value = Node.of(scope).tryGetContext(key);\n    const providerError = extractProviderError(value);\n\n    // if context is missing or an error occurred during context retrieval,\n    // report and return a dummy value.\n    if (value === undefined || providerError !== undefined) {\n      stack.reportMissingContextKey({\n        key,\n        provider: options.provider as cxschema.ContextProvider,\n        props: props as cxschema.ContextQueryProperties,\n      });\n\n      if (providerError !== undefined) {\n        Annotations.of(scope).addError(providerError);\n      }\n\n      return { value: options.dummyValue };\n    }\n\n    return { value };\n  }\n\n  private constructor() { }\n}\n\n/**\n * If the context value represents an error, return the error message\n */\nfunction extractProviderError(value: any): string | undefined {\n  if (typeof value === 'object' && value !== null) {\n    return value[cxapi.PROVIDER_ERROR_KEY];\n  }\n  return undefined;\n}\n\n/**\n * Quote colons in all strings so that we can undo the quoting at a later point\n *\n * We'll use $ as a quoting character, for no particularly good reason other\n * than that \\ is going to lead to quoting hell when the keys are stored in JSON.\n */\nfunction colonQuote(xs: string): string {\n  return xs.replace('$', '$$').replace(':', '$:');\n}\n\nfunction propsToArray(props: {[key: string]: any}, keyPrefix = ''): string[] {\n  const ret: string[] = [];\n\n  for (const key of Object.keys(props)) {\n    // skip undefined values\n    if (props[key] === undefined) {\n      continue;\n    }\n\n    switch (typeof props[key]) {\n      case 'object': {\n        ret.push(...propsToArray(props[key], `${keyPrefix}${key}.`));\n        break;\n      }\n      case 'string': {\n        ret.push(`${keyPrefix}${key}=${colonQuote(props[key])}`);\n        break;\n      }\n      default: {\n        ret.push(`${keyPrefix}${key}=${JSON.stringify(props[key])}`);\n        break;\n      }\n    }\n  }\n\n  ret.sort();\n  return ret;\n}\n"]}