Use Roslyn as a service to write powerful extensions and tools and use them in Visual Studio to improve code quality and maintain your source code more effectively.
About This Book
- Use Roslyn extensions and tools in Visual Studio to enforce "house rules" on code and fix security and performance vulnerabilities in your code.
- Write Roslyn extensions using the Roslyn service API to help developers enforce conventions and design idioms.
- Improve developer productivity by using Roslyn-based agile development features in Visual Studio, such as live unit testing, C# interactive and scripting.
- Contribute to the C# language and compiler tool chain to analyze and edit code.
Who This Book Is For
.NET Developers and architects, who are interested in taking full advantage of the Roslyn based extensions and tools to improve the development processes, will find this book useful. Roslyn contributors, i.e. the producers and C# community developers, will also find this book useful
What You Will Learn
- Write extensions to analyze source code and report warnings and errors.
- Edit C# source code to fix compiler/analyzer diagnostics or refactor source code.
- Improve code maintenance and readability by using analyzers and code fixes.
- Catch security and performance issues by using PUMA scan analyzers and FxCop analyzers.
- Perform Live Unit tests in Visual Studio.
- Use C# interactive and scripting in Visual Studio.
- Design a new C# language feature and implement various compiler phases for a new language feature.
- Write command line tools to analyze and edit C# code.
Open-sourcing the C# and Visual Basic compilers is one of the most appreciated things by the .NET community, especially as it exposes rich code analysis APIs to analyze and edit code. If you want to use Roslyn API to write powerful extensions and contribute to the C# developer tool chain, then this book is for you. Additionally, if you are just a .NET developer and want to use this rich Roslyn-based functionality in Visual Studio to improve the code quality and maintenance of your code base, then this book is also for you.
This book is divided into the following broad modules:
- Writing and consuming analyzers/fixers (Chapters 1 - 5): You will learn to write different categories of Roslyn analyzers and harness and configure analyzers in your C# projects to catch quality, security and performance issues. Moving ahead, you will learn how to improve code maintenance and readability by using code fixes and refactorings and also learn how to write them.
- Using Roslyn-based agile development features (Chapters 6 and 7): You will learn how to improve developer productivity in Visual Studio by using features such as live unit testing, C# interactive and scripting.
- Contributing to the C# language and compiler tool chain (Chapters 8 - 10): You will see the power of open-sourcing the Roslyn compiler via the simple steps this book provides; thus, you will contribute a completely new C# language feature and implement it in the Roslyn compiler codebase. Finally, you will write simple command line tools based on the Roslyn service API to analyze and edit C# code.
Style and approach
This book takes a recipe-based approach, teaching you how to perform various hacks with the Compiler API in your hands.
Table of contents
Writing Diagnostic Analyzers
- Creating, debugging, and executing an analyzer project in Visual Studio
- Creating a symbol analyzer to report issues about symbol declarations
- Creating a syntax node analyzer to report issues about language syntax
- Creating a syntax tree analyzer to analyze the source file and report syntax issues
- Creating a method body analyzer to analyze whole method and report issues
- Creating a compilation analyzer to analyze whole compilation and report issues
- Writing unit tests for an analyzer project
- Publishing NuGet package and VSIX for an analyzer project
Consuming Diagnostic Analyzers in .NET Projects
- Searching and installing analyzers through the NuGet package manager
- Searching and installing VSIX analyzers through the VS extension gallery
- Viewing and configuring analyzers in solution explorer in Visual Studio
- Using the ruleset file and Rule Set editor to configure analyzers
Writing IDE Code Fixes, Refactorings, and Intellisense Completion Providers
- Creating, debugging, and executing a CodeFixProvider to fix a compiler warning
- Applying batch code fixes (FixAll) across different scopes: document, project, and solution
- Creating a custom FixAllProvider to fix all occurrences of an issue across a scope
- Creating a CodeRefactoringProvider to refactor source code to recommend using C# 7.0 tuples
- Creating a CompletionProvider to provide additional intellisense items while editing code.
- Writing unit tests for a CodeFixProvider
Improving Code Maintenance of C# Code Base
- Configuring C# code style rules built into Visual Studio 2017
- Using the .editorconfig file for configuration of code style rules
- Using the public API analyzer for API surface maintenance
- Using third-party StyleCop analyzers for code style rules
Catch Security Vulnerabilities and Performance Issues in C# Code
- Identifying configuration-related security vulnerabilities in web applications
- Identifying cross-site scripting vulnerabilities in view markup files (.cshtml, .aspx files) in web applications
- Identifying insecure method calls that can lead to SQL and LDAP injection attacks
- Identifying weak password protection and management in web applications
- Identifying weak validation of data from external components to prevent attacks such as cross-site request forgery and path tampering
- Identifying performance improvements to source code using FxCop analyzers
Live Unit Testing in Visual Studio Enterprise
- Running live unit tests in Visual Studio for unit test projects based on NUnit, XUnit, and MSTest frameworks
- Viewing and navigating live unit test results
- Understanding incremental live unit test execution with code changes
- Understanding Start/Stop/Pause/Continue/Restart functionality for fine grain control of LUT
- Including and excluding subset of tests for live execution
- Configuring different options for live unit testing using the Tools Options dialog
C# Interactive and Scripting
- Writing a simple C# script and evaluating it within the Visual Studio interactive window
- Using script directives and REPL commands in the C# interactive window
- Using keyboard shortcuts for evaluating and navigating through script sessions in the C# interactive window
- Initializing the C# interactive session from the existing C# project
- Executing the C# script on a Visual Studio developer command prompt using csi.exe
- Using the Roslyn scripting API to execute C# code snippets
Contribute Simple Functionality to Roslyn C# Compiler Open Source Code
- Setting up Roslyn enlistment
- Implementing a new syntax error in the C# compiler code base
- Implementing a new semantic error in the C# compiler code base
- Writing unit tests for a new error in the C# compiler code base
- Using Roslyn Syntax Visualizer to view Roslyn syntax tokens and nodes for a source file
- Sending a Roslyn pull request to contribute to next version of C# compiler and VS IDE
Design and Implement a New C# Language Feature
- Designing syntax and grammar for a new C# language feature
- Implementing parser support for a new C# language feature
- Implementing binding/semantic analysis support for a new C# language feature
- Implementing lowering/code generation support for a new C# language feature
- Writing unit tests for C# parsing, binding, and codegen phases
Command-Line Tools Based on Roslyn API
- Writing an application based on the Compiler Syntax API to parse and transform source files
- Writing an application based on the Compiler Semantic API to display diagnostics and overload resolution results
- Writing an application based on the Compiler Analyzer API to execute diagnostic analyzers and display analyzer diagnostics
- Writing an application based on the Workspaces API to format and simplify all source files in the solution
- Writing an application based on the Workspaces API to edit projects in a solution and display project properties
- Title: Roslyn Cookbook
- Release date: July 2017
- Publisher(s): Packt Publishing
- ISBN: 9781787286832
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