Use multiple Perforce depots with P4CONFIG
If your project contains directories that are stored in the different Perforce depots, you might need to switch between them. IntelliJ IDEA uses
P4CONFIG to automatically switch to the respective depot as you use a Perforce-versioned directory.
P4CONFIG is an environment variable that contains the name of the P4CONFIG file without the path. If a certain directory is associated with Perforce (see Enable version control), IntelliJ IDEA seeks for the P4CONFIG file in this directory and its parents; if the file is not found, IntelliJ IDEA looks for it in the bin directory of IntelliJ IDEA installation. When a P4CONFIG file is found, IntelliJ IDEA uses the settings contained in it to connect to the respective Perforce depot.
A sample P4CONFG file might consist of the following lines:
P4CLIENT=MyClient P4USER=MySelf P4PORT=ida:3456
Create a P4CONFIG file in each directory associated with Perforce.
P4CONFIGenvironment variable that contains the file name without the path.