f8e2e52823
The cause: setting extendedState to maximized has the same effect as option-clicking the green button. Which, on Sequoia, actually un-maximizes the window if it's already maximized. Whether it's maximized or not is determined by its size alone. If there's no "normal" size to restore, then macOS just makes up one, slightly less than the screen size. This leads to a bug when the saved size happens to be the same as the maximum one, which happens quite often. Then the size is restored, and when extendedState is set, it makes the frame smaller than it should be. The fix: if the saved state is maximized, do not restore the saved size, but instead restore some size that's smaller than the current screen. For this we introduce an extra parameter to setDefaultSize(), so we can specify the exact screen (determined by the saved location). This way setting extendedState works as expected, maximizing the frame. To prevent setExtendedState() from saving this fake size as the "normal" one, swap restoring the state and restoring the normal bounds in create(): now we restore the state first, and then apply the normal bounds, overwriting whatever setExtendedState() could have saved there. (cherry picked from commit 4f190f6ce5b9d7c5dc52f11abbee4fde53a135b4) IJ-CR-149074 GitOrigin-RevId: d184fb0dff15f7b3f10e94fbddd476a4d3e03cfe
IntelliJ IDEA Community Edition 
These instructions will help you build IntelliJ IDEA Community Edition from source code, which is the basis for IntelliJ Platform development. The following conventions will be used to refer to directories on your machine:
<USER_HOME>is your home directory.<IDEA_HOME>is the root directory for the IntelliJ source code.
Getting IntelliJ IDEA Community Edition Source Code
IntelliJ IDEA Community Edition source code is available from github.com/JetBrains/intellij-community by either cloning or
downloading a zip file (based on a branch) into <IDEA_HOME>. The default is the master branch.
The master branch contains the source code which will be used to create the next major version of IntelliJ IDEA. The branch names and build numbers for older releases of IntelliJ IDEA can be found on the page of Build Number Ranges.
These Git operations can also be done through the IntelliJ IDEA user interface.
Speed Tip: If the complete repository history isn't needed, then using a shallow clone (git clone --depth 1) will save significant time.
On Windows: Two git options are required to check out sources on Windows. Since it's a common source of Git issues on Windows anyway, those options could be set globally (execute those commands before cloning any of intellij-community/android repositories):
git config --global core.longpaths truegit config --global core.autocrlf input
IntelliJ IDEA Community Edition requires additional Android modules from separate Git repositories. To clone these repositories,
run one of the getPlugins scripts located in the <IDEA_HOME> directory. Use the --shallow argument if the complete repository history isn't needed.
These scripts clone their respective master branches. Make sure you are inside the <IDEA_HOME> directory when running those scripts, so the modules get cloned inside the <IDEA_HOME> directory.
getPlugins.shfor Linux or macOS.getPlugins.batfor Windows.
Note: Always git checkout the intellij-community and android Git repositories to the same branches/tags.
Building IntelliJ Community Edition
Version 2023.2 or newer of IntelliJ IDEA Community Edition or IntelliJ IDEA Ultimate Edition is required to build and develop for the IntelliJ Platform.
Opening the IntelliJ Source Code for Build
Using IntelliJ IDEA File | Open, select the <IDEA_HOME> directory.
- If IntelliJ IDEA displays an error about a missing or out of date required plugin (e.g. Kotlin), enable, upgrade, or install that plugin and restart IntelliJ IDEA.
IntelliJ Build Configuration
- It's recommended to use JetBrains Runtime 17 to compile the project. When you invoke Build Project for the first time, IntelliJ IDEA should suggest downloading it automatically.
- If the Maven plugin is disabled, add the path variable
"MAVEN_REPOSITORY" pointing to
<USER_HOME>/.m2/repositorydirectory. - Make sure you have at least 8GB of RAM on your computer. With the bare minimum of RAM, disable "Compile independent modules in parallel" option in the compiler settings. With notably more memory available, increase "User-local build process heap size" to 3000 - that will greatly reduce compilation time.
Note that it is important to use the variant of JetBrains Runtime without JCEF.
So, if for some reason jbr-17 SDK points to an installation of JetBrains Runtime with JCEF, you need to change it:
ensure that IntelliJ IDEA is running in internal mode (by adding idea.is.internal=true to idea.properties file), navigate to jbr-17
item in Project Structure | SDKs, click on 'Browse' button, choose 'Download...' item and select version 17 and vendor 'JetBrains Runtime'.
Building the IntelliJ Application Source Code
To build IntelliJ IDEA Community Edition from source, choose Build | Build Project from the main menu.
To build installation packages, run the installers.cmd command in <IDEA_HOME> directory. installers.cmd will work on both Windows and Unix systems.
Options to build installers are passed as system properties to installers.cmd command.
You may find the list of available properties in BuildOptions.kt
Examples (./ should be added only for Linux/macOS):
- Build installers only for current operating system:
./installers.cmd -Dintellij.build.target.os=current - Build source code incrementally (do not build what was already built before):
./installers.cmd -Dintellij.build.incremental.compilation=true
installers.cmd is used just to run OpenSourceCommunityInstallersBuildTarget from the command line.
You may call it directly from IDEA, see run configuration Build IDEA Community Installers (current OS) for an example.
Dockerized Build Environment
To build installation packages inside a Docker container with preinstalled dependencies and tools, run the following command in <IDEA_HOME> directory (on Windows, use PowerShell):
docker run --rm -it -v ${PWD}:/community $(docker build -q . --target build_env)
Running IntelliJ IDEA
To run the IntelliJ IDEA built from source, choose Run | Run from the main menu. This will use the preconfigured run configuration "IDEA".
To run tests on the build, apply these setting to the Run | Edit Configurations... | Templates | JUnit configuration tab:
- Working dir:
<IDEA_HOME>/bin - VM options:
-ea
You can find other helpful information at https://www.jetbrains.com/opensource/idea. The "Contribute Code" section of that site describes how you can contribute to IntelliJ IDEA.
Running IntelliJ IDEA on CI/CD environment
To run tests outside of IntelliJ IDEA, run the tests.cmd command in <IDEA_HOME> directory. tests.cmd will work on both Windows and Unix systems.
Options to run tests are passed as system properties to tests.cmd command.
You may find the list of available properties in TestingOptions.kt
Examples (./ should be added only for Linux/macOS):
- Build source code incrementally (do not build what was already built before):
./tests.cmd -Dintellij.build.incremental.compilation=true - Run a specific test:
./tests.cmd -Dintellij.build.test.patterns=com.intellij.util.ArrayUtilTest
tests.cmd is used just to run CommunityRunTestsBuildTarget from the command line.
You may call it directly from IDEA, see run configuration tests in community for an example.