[codex] stamp generated marker with project identity and version

[tinovyatkin]

Summary

• Include the antlr-rust-runtime package name and version in the generated Rust module marker.
• Include the project repository URL from Cargo package metadata in generated files.
• Extend the generated-header unit test so the project/version marker and repository URL are covered, using compile-time concat! for the expected marker.

Why

Generated parsers previously only carried // @generated by antlr4-rust-gen - do not edit, which tied the marker to an internal helper binary name. Stamping the stable crate/project identity, version, and repository URL makes GitHub-search based outreach practical for very old generated parser versions after major releases.

Validation

• cargo test --quiet --bin antlr4-rust-gen generated_modules_start_with_file_level_header
• cargo test --quiet --test antlr4_rust_gen_cli
• git diff --check -- src/bin/antlr4-rust-gen.rs

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: ASSERTIVE

Plan: Pro

Run ID: 986e8871-25fc-4623-a682-6d235f0df3bf

📥 Commits

Reviewing files that changed from the base of the PR and between f8341cd and 0334b06.

📒 Files selected for processing (1)

• src/bin/antlr4-rust-gen.rs

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Walkthrough

The generated module header now uses Cargo package name, version, and repository metadata through a concat! expression and env!. Existing attributes and wrapper lines remain unchanged. The related test now validates the package metadata fragment and repository value in the generated header.

Poem

I’m a rabbit with a header to write,
Package and version now shine bright.
The repository joins the tune,
While wrapper lines remain in bloom.
Tests hop after, precise and clear—
Metadata carrots for every ear!

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	It clearly describes updating the generated marker with project identity and version, which matches the main change.
Description check	✅ Passed	The description accurately summarizes the header metadata update and the added tests.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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[github-actions]

Copy/Paste Detection

No duplications found in 1 changed Rust file(s) (threshold: 100 tokens).

[gemini-code-assist]

Code Review

This pull request updates the generated module header in antlr4-rust-gen.rs to dynamically include the generator's version and repository URL at compile time, and adds unit tests to verify this header. The feedback suggests optimizing the test assertion by using concat! instead of format! to avoid runtime string allocation.

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[gemini-code-assist]

Since env!("CARGO_PKG_VERSION") is a compile-time constant, we can construct the expected string at compile time using concat! instead of allocating a new String at runtime with format!.

Suggested change

	assert!(GENERATED_MODULE_HEADER.contains(&format!(
	"@generated by antlr4-rust-gen v{}",
	env!("CARGO_PKG_VERSION")
	)));
	assert!(GENERATED_MODULE_HEADER.contains(concat!(
	"@generated by antlr4-rust-gen v",
	env!("CARGO_PKG_VERSION")
	)));