kapt migration ksp tutorial

This article provides a comprehensive guide on migrating from Kapt to KSP, a more advanced annotation processing tool. The migration process involves adding the KSP plugin, annotating Kotlin classes with KSP annotations, creating a Kotlin Symbol Proc

Kapt Migrating to KSP Tutorial

What is the difference between Kapt and KSP?

Kapt (Kotlin Annotation Processing Tool) is an annotation processor that runs during compilation and generates Java source code based on Kotlin annotations. KSP (Kotlin Symbol Processing), on the other hand, is a symbol processor that operates on the Kotlin abstract syntax tree (AST) during compilation, allowing for more flexibility and control over code generation.

How to migrate from Kapt to KSP?

Migrating from Kapt to KSP involves the following steps:

1. Add the KSP plugin to your project: In your build.gradle file, add the following plugin:build.gradle file, add the following plugin:

<code>plugins {
    ...
    id 'com.google.devtools.ksp' version '1.7.21-1.0.7'
}</code>

2. Annotate your Kotlin classes with KSP annotations: KSP uses annotations to identify classes or methods that require processing. Migrate your existing Kapt annotations to their KSP equivalents.
3. Create a Kotlin Symbol Processor: Implement a Kotlin Symbol Processor that defines the processing logic. This can be done by creating a class that extends AbstractSymbolProcessor.
4. Register your Symbol Processor: In your build.gradle

<code>ksp {
    arg("verbose", "true") // Optional: Enables verbose logging for debugging
    include "com.example.myprocessor" // Package containing your Symbol Processor
}</code>

Annotate your Kotlin classes with KSP annotations:
5. KSP uses annotations to identify classes or methods that require processing. Migrate your existing Kapt annotations to their KSP equivalents.
Create a Kotlin Symbol Processor:
Implement a Kotlin Symbol Processor that defines the processing logic. This can be done by creating a class that extends AbstractSymbolProcessor.

Register your Symbol Processor:

In your build.gradle file, register your Symbol Processor by adding the following lines:
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1. Clean and rebuild your project: To apply the KSP changes, clean and rebuild your project.
2. What are the advantages of KSP over Kapt?
3. KSP offers several advantages over Kapt, including:
4. Improved performance: KSP is faster than Kapt as it operates directly on the Kotlin AST, eliminating the need for intermediate Java source code generation.
🎜More flexibility:🎜 KSP allows for greater control and flexibility over code generation, as it provides a more granular API for processing symbols.🎜🎜🎜Enhanced debugging:🎜 KSP generates error messages that are more specific and easier to understand, facilitating debugging.🎜🎜🎜Kotlin-native support:🎜 KSP supports both Kotlin JVM and Kotlin-native, enabling code generation for both platforms.🎜🎜

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