feat(spec2cdk): support for auto-generated grants in alpha modules by otaviomacedo · Pull Request #36206 · aws/aws-cdk

otaviomacedo · 2025-11-26T09:49:46Z

Grants classes are only generated in the aws-cdk-lib module (if a grants.json file is present). However, for alpha modules, we want the auto-generated files to be treated as alpha.

This PR adds support for generating Grants classes in alpha modules, if a grants.json file is present.

Also added a new grants.json in aws-elasticache-alpha to demonstrate that the change works.

Main changes:

generateAll() now takes an additional output directory: the root of the alpha modules.
A new GrantsProps struct is being passed around, that contains the config itself plus a flag indicating whether the module is stable.
The location where the module should be written now depends on whether the module is stable.
In the grants module, the import for the corresponding stable module is either
- import * as <service> from "./<service>.generated";, for stable modules, or
- import * as <service> from "aws-cdk-lib/aws-<service>";, for unstable modules.

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache-2.0 license

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packages/aws-cdk-lib/scripts/gen.ts

otaviomacedo · 2025-11-26T09:51:48Z

tools/@aws-cdk/spec2cdk/lib/util/ts-file-writer.ts

-  public write(module: Module, filePath: string): string {
-    log.debug(module.name, filePath, 'render');
-    const fullPath = path.join(this.rootDir, filePath);
+  public write(module: Module, fullPath: string): string {


The behavior here has changed: the second parameter is an absolute path, instead of relative to some root directory passed to the constructor.

# Conflicts: # packages/@aws-cdk/aws-elasticache-alpha/lib/serverless-cache-base.ts # tools/@aws-cdk/spec2cdk/lib/cdk/aws-cdk-lib.ts # tools/@aws-cdk/spec2cdk/lib/cdk/grants-module.ts # tools/@aws-cdk/spec2cdk/lib/cdk/library-builder.ts # tools/@aws-cdk/spec2cdk/test/grants.test.ts

github-actions · 2025-12-16T11:26:16Z

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# Conflicts: # tools/@aws-cdk/spec2cdk/test/expect-to-contain-code.ts

mergify · 2026-01-13T09:34:46Z

Thank you for contributing! Your pull request will be updated from main and then merged automatically (do not update manually, and be sure to allow changes to be pushed to your fork).

mergify · 2026-01-13T09:35:18Z

mergify · 2026-01-13T10:13:06Z

Thank you for contributing! Your pull request will be updated from main and then merged automatically (do not update manually, and be sure to allow changes to be pushed to your fork).

github-actions · 2026-01-13T10:13:20Z

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feat(spec2cdk): support for auto-generated grants in alpha modules

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PRs with Conflicts - 12 PR(s) pahud/aws-cdk#13

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otaviomacedo added the pr/do-not-merge This PR should not be merged at this time. label Dec 16, 2025

otaviomacedo marked this pull request as draft December 16, 2025 10:10

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Failed CodeBuild CI - 33 PR(s) pahud/aws-cdk#17

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otaviomacedo added 4 commits January 7, 2026 09:24

Merge branch 'main' into otaviom/alpha-grants

08ae124

gen-cdk as part of spec2cdk, that gets run individually for each package

3286f66

Merge branch 'main' into otaviom/alpha-grants

2fb64ca

# Conflicts: # tools/@aws-cdk/spec2cdk/test/expect-to-contain-code.ts

move gen-cdk.ts to bin

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otaviomacedo marked this pull request as ready for review January 8, 2026 10:33

otaviomacedo requested a review from rix0rrr January 8, 2026 10:33

rix0rrr approved these changes Jan 8, 2026

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otaviomacedo removed the pr/do-not-merge This PR should not be merged at this time. label Jan 13, 2026

Merge branch 'main' into otaviom/alpha-grants

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mergify bot merged commit 776f837 into main Jan 13, 2026
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mergify bot deleted the otaviom/alpha-grants branch January 13, 2026 10:13

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feat(spec2cdk): support for auto-generated grants in alpha modules#36206

feat(spec2cdk): support for auto-generated grants in alpha modules#36206
mergify[bot] merged 7 commits intomainfrom
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