Standardized outputs: CLI summaries, log details

[JoshuaKGoldberg]

PR Checklist

• Addresses an existing issue: fixes Switch detailed rule differences to info (file) output #404
• That issue was marked as status: accepting prs

Overview

The new output is now like:

✨ 90 rules replaced with their ESLint equivalents. ✨

❗ 10 ESLint rules behave differently from their TSLint counterparts ❗
  Check ./tslint-to-eslint-config.log for details.

❌ 1 error thrown. ❌
  Check ./tslint-to-eslint-config.log for details.
️
❓ 1 rule is not known by tslint-to-eslint-config to have an ESLint equivalent. ❓
  The "@typescript-eslint/tslint/config" section of ./.eslintrc.js configures eslint-plugin-tslint to run it in TSLint within ESLint.
  Check ./tslint-to-eslint-config.log for details.

⚡ 6 packages are required for running with ESLint. ⚡
  npm install @typescript-eslint/eslint-plugin @typescript-eslint/parser eslint eslint-plugin-import eslint-plugin-jsdoc eslint-plugin-prefer-arrow --save-dev
️
❓ 1 editor setting is not known by tslint-to-eslint-config to have an ESLint equivalent. ❓
  Check ./tslint-to-eslint-config.log for details.

✅ All is well! ✅

...with the file:

10 ESLint rules behave differently from their TSLint counterparts:
  * camelcase:
    - Leading undescores in variable names will now be ignored.
    - ESLint's camel-case rule does not allow pascal or snake case variable names. Those cases are reserved for class names and static methods.
  * no-underscore-dangle:
    - Leading and trailing underscores (_) on identifiers will now be ignored.
  * space-before-function-paren:
    - Option "method" is not supported by ESLint.
    - Option "constructor" is not supported by ESLint.
  * no-console:
    - Custom console methods, if they exist, will no longer be allowed.
  * import/no-extraneous-dependencies:
    - ESLint does not support whitelisting modules
  * no-invalid-this:
    - Functions in methods will no longer be ignored.
  * no-unused-expressions:
    - The TSLint optional config "allow-new" is the default ESLint behavior and will no longer be ignored.
  * prefer-arrow/prefer-arrow-functions:
    - ESLint does not support allowing standalone function declarations.
    - ESLint does not support allowing named functions defined with the function keyword.
  * eqeqeq:
    - Option "smart" allows for comparing two literal values, evaluating the value of typeof and null comparisons.
  * no-redeclare:
    - ESLint does not support check-parameters.

Error: multiple output @typescript-eslint/triple-slash-reference ESLint rule options were generated, but tslint-to-eslint-config doesn't have "merger" logic to deal with this.
Please file an issue at https://github.com/typescript-eslint/tslint-to-eslint-config/issues/new?template=missing_merger.md. Thanks!

1 rule is not known by tslint-to-eslint-config to have an ESLint equivalent:
  * tslint-to-eslint-config does not know the ESLint equivalent for TSLint's "prefer-conditional-expression".

1 editor setting is not known by tslint-to-eslint-config to have an ESLint equivalent:
  * tslint-to-eslint-config does not know the ESLint equivalent for TSLint's "editor.tabSize".