docs: add docs for .cpprc

Author: aminya

README.md

@@ -82,10 +82,11 @@ sudo ./setup_cpp_mac --compiler llvm --cmake true --ninja true --ccache true --v
 source ~/.cpprc # activate cpp enviroment variables
 ```
 
-NOTE: In the `compiler` entry, you can specify the version after `-` like `llvm-11.0.0`.
-For the tools, instead of `true` that chooses the default version, you can pass a specific version.
+NOTE: In the `compiler` entry, you can specify the version after `-` like `llvm-11.0.0`. For the tools, you can pass a specific version instead of `true` that chooses the default version
 
-NOTE: you will not need `sudo` if you are already a root user (e.g., in a GitLab runner).
+NOTE: On Unix systems, when `setup-cpp` is used locally or in other CI services like GitLab, the environment variables are added to `~/.cpprc`. You should run `source ~/.cpprc` to immediately activate the environment variables. This file is automatically sourced in the next shell restart from `~/.bashrc` or `~/.profile` if `SOURCE_CPPRC` is not set to `0`.
+
+NOTE: On Unix systems, you will not need `sudo` if you are already a root user (e.g., in a GitLab runner or Docker).
 
 ### With Nodejs
 

src/main.ts

@@ -227,12 +227,12 @@ export async function main(args: string[]): Promise<number> {
   if (!isGitHubCI()) {
     switch (process.platform) {
       case "win32": {
-        core.info("Run `RefreshEnv.cmd` or restart your shell to update the environment.")
+        warning("Run `RefreshEnv.cmd` or restart your shell to update the environment.")
         break
       }
       case "linux":
       case "darwin": {
-        core.info("Run `source ~/.cpprc` or restart your shell to update the environment.")
+        warning("Run `source ~/.cpprc` or restart your shell to update the environment.")
         break
       }
       default: {