Replace Handlebars templating with direct string rendering

[DZakh]

Remove the Handlebars templating system and replace it with direct Rust string rendering for template generation. This simplifies the codebase by eliminating the need for .hbs template files and the handlebars dependency.

Changes

• Removed Handlebars infrastructure:

  • Delete hbs_dir_generator.rs which recursively processed .hbs template files
  • Remove handlebars dependency from Cargo.toml
  • Delete all .hbs template files from templates/dynamic/

• Implemented direct rendering methods:

  • Add env_template.rs module with render() function for .env file generation (used by both init and contract import)
  • Add render_package_json() method to InitTemplates struct with comprehensive test coverage for ReScript, TypeScript, and extra dependencies
  • Add render_schema_graphql() and render_env() methods to AutoSchemaHandlerTemplate struct
  • Add snapshot test for schema.graphql rendering

• Updated callers:

  • init.rs: Replace HandleBarsDirGenerator with direct fs::write() calls to .env and package.json
  • contract_import_templates.rs: Replace HandleBarsDirGenerator with direct fs::write() calls and inline rendering methods
  • Remove unused get_dynamic_dir() and related methods from TemplateDirs
  • Remove Serialize derive from InitTemplates (no longer needed for Handlebars)

• Cleanup:

  • Remove unused Handlebars test in system_config.rs
  • Remove tests for dynamic template directory access
  • Update module exports in hbs_templating/mod.rs

The new approach is more maintainable: template logic is now explicit Rust code with full type safety and IDE support, rather than scattered across template files and Handlebars helpers.

https://claude.ai/code/session_01Kt8L8CRc3wjfiSoyXaUFeZ

Summary by CodeRabbit

• New Features

  • envio init now creates tailored .env and package.json files for ReScript and TypeScript projects.
  • Contract imports now generate schema.graphql files with event and field definitions.
  • .env files include clearer API token setup guidance or the provided token.

• Refactor

  • Simplified project and contract-import template generation for more consistent output.
  • Removed support for dynamic template directories.

[coderabbitai]

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Review details

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

Run ID: cacd407c-cdf4-4221-8bca-0dbed9e17cad

📥 Commits

Reviewing files that changed from the base of the PR and between 9be0f58 and 7cf008a.

📒 Files selected for processing (1)

• packages/cli/src/config_parsing/system_config.rs

📝 Walkthrough

Walkthrough

The CLI removes dynamic Handlebars template generation and renders initialization and contract-import files directly. New helpers generate .env, package.json, and GraphQL schema content, while template-directory APIs and related tests are removed or updated.

Changes

Direct template rendering

Layer / File(s)	Summary
Remove dynamic Handlebars infrastructure packages/cli/Cargo.toml, packages/cli/src/hbs_templating/*, packages/cli/src/template_dirs.rs, packages/cli/src/config_parsing/system_config.rs, packages/cli/templates/dynamic/*	Removes the Handlebars dependency, directory generator, dynamic template lookup, dynamic template files, and related tests and exports.
Add direct rendering helpers packages/cli/src/hbs_templating/env_template.rs, packages/cli/src/hbs_templating/init_templates.rs	Adds .env and package.json rendering methods with snapshot tests.
Render initialization files directly packages/cli/src/executor/init.rs	The init command renders and writes .env and package.json directly with contextual filesystem errors.
Render contract-import outputs directly packages/cli/src/hbs_templating/contract_import_templates.rs, packages/cli/src/type_schema.rs	Contract import writes .env and computed GraphQL schema definitions directly; TypeIdent serializes as its stringified type, with EVM snapshot coverage.

Estimated code review effort: 4 (Complex) | ~45 minutes

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title accurately summarizes the main change: replacing Handlebars-based template generation with direct string rendering.
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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