Follow the Compilation Database instructions below to create the appropriate project description file in the fuchsia root directory.
Then in CLion choose Import Project from Sources and select the fuchsia root directory.
To improve performance you can try some or all of the following. They are only suggestions, we recommend checking with directly with JetBrains at https://intellij-support.jetbrains.com/hc to be sure what works best for your environment.
To speed up indexing time you can exclude directories you are not working with. You can do that in the Project View by right-clicking each directory and choosing Mark directory as->Excluded. Note the affected configuration is stored in <project>/.idea/misc.xml
See Control Source, Library, and Exclude Directories - Help | CLion for more information.
The fuchsia source tree has a fair number of git repositories. Scanning them can use CPU cycles for CLion. You can unregister the git repositories you are not working on under File -> Settings -> Version Control. They will still be listed there so you can add them back later if needed.
See Tuning CLion - Help | CLion for general tips on tweaking CLion JVM Options and Platform Properties. As that link suggests, contact CLion support for instructions regarding the options and values that might help you with whatever issue you are trying to solve.
See Helpful Vim tools for Fuchsia development.
There are multiple VS Code setups known to work to different degrees. The sections below describe the different setups (pick one).
Install vscode-clangd. Disable the default C/C++ extension if you have it installed.
In settings, add:
"clangd.path": "<absolute path to fuchsia root directory>/prebuilt/third_party/clang/<platform>/bin/clangd",
Note: The path to clangd does need to be absolute.
Finally, follow the Compilation Database instructions below to generate the compile_commands.json in the fuchsia root directory. Then reload VS Code to enjoy the results.
You may also benefit from enabling background indexing and clang-tidy using the following settings:
"clangd.arguments": [
"--clang-tidy",
"--background-index"
]
Further details on clangd setup can be found here.
Install the default C/C++ extension suggested by VS Code.
You can use tasks to configure a compilation step.
A Compilation Database file, compile_commands.json, will be created automatically by fx within your current build directory as well as automatically symlinked to your source root.
Note that this file is only intended to help the IDE find and parse the source files. Building should still be done with fx build.
Note: There is an ongoing issue where CLion shows compiler errors for a few hundred files in the Fuchsia source code. Other files should work fine in CLion.