feat: support source tracing for python#1674
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megha-narayanan merged 5 commits intoJun 29, 2026
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Parse jsii host-language (Python/Java) creation-stack frames in the source resolver and remove the TypeScript-only diagnostics gate, so go-to-definition and policy violations work for non-TypeScript CDK apps synthed with JSII_HOST_STACK_TRACES=1. Verified end to end against jsii 1.137.0 and aws-cdk-lib 2.260.0.
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Co-authored-by: Otavio Macedo <288203+otaviomacedo@users.noreply.github.com>
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Jun 29, 2026
normalizeHostFrame preserves a real host column and clamps the 0 'unavailable' sentinel to 1. Update the test to expect the column unchanged and refresh the stale 0-indexed comments.
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jsii's Java runtime sends only a bare source filename (getFileName()) with no path, so Java frames can't be located without source-root reconstruction. Ship Python source tracing only; track Java as a follow-up.
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Add utilities to source resolver to parse jsii host-language creation-stack frames for Python, and drop the TypeScript-only diagnostics gate. Go-to-definition (source → template, and reverse) and policy-violation diagnostics now work for Python apps, not just TypeScript.
Requires synthing with
JSII_HOST_STACK_TRACES=1(opt-in; jsii 1.137+ / aws-cdk-lib 2.260+). Auto-enabling it for LSP-triggered synth is a follow-up. Java support separated into new PR due to FQN path parsing complexities.Example:
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By submitting this pull request, I confirm that my contribution is made under the terms of the Apache-2.0 license