feat(cli): add --version flag to command line interface

[Prakhar54-byte]

Resolves #72 the requested feature to add a --version / -V flag.

This exposes the package version via the CLI (e.g., databusclient --version). The __version__ was refactored in __init__.py to avoid circular imports when loaded by cli.py.

Summary by CodeRabbit

• New Features
  • The command-line interface now supports a --version option, which displays the program name and its version number. This makes it easier to check which version of the application is installed directly from the command line.

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📝 Walkthrough

Walkthrough

The package initializes its version value, and the CLI adds a Click --version option that displays the program name and package version.

Changes

CLI version option

Layer / File(s)	Summary
Package version and CLI option databusclient/__init__.py, databusclient/cli.py	The package initializes __version__ to "0.15" before importing it from databusclient.version. The CLI imports __version__ and registers Click’s version option with databusclient as the program name.

Priority: ⬇️ Low

Estimated code review effort: 2 (Simple) | ~5 minutes

Change: Feature · Severity of issue fixed: Low

Suggested reviewers: integer-ctrl

Merge Risk: 🟡 Moderate · up to f459a

The new --version flag reports the wrong version. Correct the initialization order before merging so the flag fulfills its purpose.

Architecture Summary

Architecture risk: 🔵 Low · up to f459a

The change affects 1 system.

Changed systems: databusclient

Architecture concerns
No architecture-level concerns identified.

Review details

Systems and components

• observed — databusclient (service) was modified; 2 changed files map to changed impact.

Before / after behavior

• observed — Modified behavior in databusclient/init.py: Adds a package-level __version__ assignment to "0.15"; the later import from databusclient.version rebinds that name.
• observed — Modified behavior in databusclient/cli.py: Imports the package’s __version__ for the CLI version option.
• observed — Modified behavior in databusclient/cli.py: Adds Click’s version option to the command group, using the package version and databusclient as the displayed program name.

🚥 Pre-merge checks | ✅ 3 | ❌ 2

❌ Failed checks (2 warnings)

Check name	Status	Explanation	Resolution
Description check	⚠️ Warning	The description explains the feature and references issue #72, but it omits the required Description, Type of change, and Checklist sections. It does not document testing or review status.	Add the required template sections. Select the applicable change type, complete the checklist, and state whether tests and lint checks passed.
Linked Issues check	⚠️ Warning	Issue #72 requires databusclient --version to display the installed package version. databusclient/cli.py registers Click's version option with the imported __version__. During package initializ…	Initialize the canonical version before importing cli, or otherwise pass the final metadata-derived version to click.version_option. Add an automated CLI test that verifies --version reports the installed package version.

✅ Passed checks (3 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly identifies the main change: adding a CLI --version flag. It is concise and specific.
Out of Scope Changes check	✅ Passed	The reviewed changes are limited to version initialization in databusclient/__init__.py and registration of the Click version option in databusclient/cli.py. Both changes directly support issue #7…
Docstring Coverage	✅ Passed	Docstring coverage is 100.00% which is sufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 1 functions across 2 files.

Full details: Linked Issues check

Explanation

Issue #72 requires databusclient --version to display the installed package version. databusclient/cli.py registers Click's version option with the imported __version__. During package initialization, databusclient/__init__.py first sets __version__ to "0.15", imports cli, and only then imports databusclient.version.__version__. Therefore, cli.app captures "0.15" even though databusclient/version.py reads 1.1.0 from pyproject.toml. The CLI reports a stale version.

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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create a new PR

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Actionable comments posted: 1

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• 🪄 Fix CodeRabbit comments on this PR

🤖 Prompt to fix review comments

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Inline comments:
In @databusclient/__init__.py:
- Line 8: Import __version__ from databusclient.version before importing
databusclient.cli in the package initializer, and remove the hard-coded version
so the CLI uses the metadata-derived value.

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ℹ️ Review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Advanced

Run ID: fe13a6cc-d160-4949-9329-2803514b6fc1

📥 Commits

Reviewing files that changed from the base of the PR and between 3701c23 and f459a6c.

📒 Files selected for processing (2)

• databusclient/__init__.py
• databusclient/cli.py

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