Git and IntelliJ IDEA
External
- https://intellij-support.jetbrains.com/hc/en-us/articles/206544839-How-to-manage-projects-under-Version-Control-Systems
- https://github.com/github/gitignore/blob/master/Global/JetBrains.gitignore
Internal
Overview
The contents of the .idea directory can be generally shared, with the exceptions mentioned below.
The module .iml files located throughout the source directory tree should also be shared, unless you plan to import the project locally with Maven or Gradle import functionality. In that case, the .iml files will be created.
The .iml module files present across the source code tree may not be shared in case the project is locally imported with Gradle or Maven import functionality. Also, XML files under .idea/libraries may not be shared in case they are generated from Gradle or Maven project.
.idea/**/workspace.xml
.idea/**/tasks.xml
User dictionaries should not be shared, because they may conflict with other users'.
.idea/**/dictionaries
In IDEA 13 or earlier, don't share datasources.xml because they contain user passwords.
gradle.xml points to the specific local path where Gradle is installed, so it should shared.
Suggested .gitignore
# User-specific stuff
.idea/**/workspace.xml
.idea/**/tasks.xml
.idea/**/dictionaries
.idea/**/shelf
# Sensitive or high-churn files
.idea/**/dataSources/
.idea/**/dataSources.ids
.idea/**/dataSources.local.xml
.idea/**/sqlDataSources.xml
.idea/**/dynamic.xml
.idea/**/uiDesigner.xml
# Gradle
.idea/**/gradle.xml
.idea/**/libraries
# File-based project format
*.iws
# IntelliJ
out/