Validate user input from init command

[rbogart1990]

This PR introduces validation for user input values during the poetry init command. It uses the rules defined in the project-schema.json schema. These rules are already enforced when running the poetry add command, so this change extends the same validation rules to the poetry init command.

Previously, user inputs were not validated against these schema rules, allowing the creation of Poetry projects with invalid or disallowed names (e.g. "new+project").

This change ensures that inputs conform to the schema before proceeding, preventing invalid project configurations.

Pull Request Check List

Resolves: #10170

• [x] Added tests for changed code.
• [ ] Updated documentation for changed code.

Summary by Sourcery

Validate user inputs against the project schema in the 'poetry init' command and abort on validation errors.

New Features:

• Add schema-based validation of project metadata in the init command

Enhancements:

• Extend existing validation rules from 'poetry add' to the 'poetry init' command

Tests:

• Add parametrized tests for valid and invalid project names during initialization

[sourcery-ai[bot]]

Reviewer's Guide

A new validation step for user inputs in the poetry init command is implemented—reusing the existing project-schema rules via Factory.validate—and corresponding unit tests are added to cover valid and invalid project names.

Sequence diagram for user input validation in poetry init command

sequenceDiagram
    actor User
    participant InitCommand as poetry init
    participant Factory
    User->>InitCommand: Run poetry init and provide project info
    InitCommand->>Factory: validate(pyproject_data)
    Factory-->>InitCommand: Validation results
    alt Validation errors
        InitCommand-->>User: Show validation error and abort
    else Validation passes
        InitCommand->>InitCommand: Save pyproject.toml
        InitCommand-->>User: Project initialized
    end

File-Level Changes

Change	Details	Files
Extend InitCommand to validate pyproject data before saving	Insert pre-save validation call in _init_pyproject, aborts on errors Add staticmethod _validate using Factory.validate	src/poetry/console/commands/init.py
Add parameterized tests for project name validation	Create build_pyproject_data helper Add tests for valid project names Add tests for invalid project names	tests/console/commands/test_init.py

Possibly linked issues

• #10170: The PR adds validation to poetry init to prevent creating projects with invalid names, resolving the issue.

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