fix(cli): cdk context header always claims the context was found in cdk.json

[go-to-k]

Fixes #1814

Problem

cdk context lists the merged context from cdk.json, cdk.context.json and ~/.cdk.json, but the listing header is hardcoded to Context found in cdk.json: (PROJECT_CONFIG). When cdk.json has no context key and all values come from cdk.context.json, the header points the user at the wrong file.

Fix

• Configuration (which builds the context from its sources) now exposes contextSourceFiles: the names of the context files that currently contain at least one value, in lookup precedence order.
• The context command renders the header from that list, e.g. Context found in cdk.context.json: or Context found in cdk.json, cdk.context.json:. When no file source is known (e.g. context passed only on the command line), it falls back to a generic Context found: header.

The change is contained in the aws-cdk package; the Context class in toolkit-lib (not part of its public API) is unchanged.

Testing

• New unit tests in test/cli/user-config.test.ts: contextSourceFiles lists all of cdk.json / cdk.context.json / ~/.cdk.json when each contains context, and omits files without context values (e.g. a cdk.json that has settings but no context key).
• New unit tests in test/commands/context-command.test.ts: the listing header names the provided source files, and falls back to the generic header when the sources are unknown.

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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

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 90.31%. Comparing base (785506e) to head (2b194dd).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1816      +/-   ##
==========================================
- Coverage   90.32%   90.31%   -0.02%     
==========================================
  Files          80       80              
  Lines       12124    12149      +25     
  Branches     1716     1723       +7     
==========================================
+ Hits        10951    10972      +21     
- Misses       1139     1143       +4     
  Partials       34       34              

Flag	Coverage Δ
suite.unit	90.31% <100.00%> (-0.02%)	⬇️

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