spring-tools/idea-extensions/idea-boot-java/README.md

Spring Boot Java Support for IntelliJ IDEA (Experimental)

The support is based on IntelliJ LSP client plugin https://github.com/gtache/intellij-lsp

Dev Instructions

1. Clone and import the project into IntelliJ. ()Project is Scala based hence accept whatever IntelliJ suggests about having Scala)
2. Build boot-java-language-server maven project from STS4 (https://github.com/spring-projects/sts4/tree/master/headless-services/boot-java-language-server)
3. Copy the built jar file into this project /resources/server folder and name it language-server.jar
4. Install LSP Support plugin into IntelliJ as explained here: https://www.jetbrains.com/help/idea/installing-updating-and-uninstalling-repository-plugins.html
5. For some reason it's not enough for the dev env, hence also download the same plugin from https://www.jetbrains.com/help/idea/installing-updating-and-uninstalling-repository-plugins.html
6. Unzip the downloaded file and copy the folder into IntelliJ pligins folder
7. Select idea-boot-java project in IntelliJ go to File -> Project Structure... and then Platform Settings -> SDKs
8. Select IntelliJ IDEA in the middle pane. Find + in the bottom left corner of the right-most pane and click on it (list of jars within IntelliJ SDK)
9. Find all Jars under the IntelliJ/plugins/LSP folder, select all of them and press Open in the dialog. This will ensure that your target platform has necessary LSP jars
10. Click on Run -> Run..., create new Plugin launch config. Select Use classpath of module to be idea-boot-java, select JRE to the IntelliJ IDEA SDK from step 8
11. Run the configuration. This should start IntelliJ runtime workbench where idea-boot-java LS plugin is available