The custom target used to invoke Gradle from Meson should always
be built, otherwise, the server would not be rebuilt on source changes.
However, when enabling "build_always", gradle is invoked as root on
"sudo ninja install" after "ninja", so it downloads the whole Gradle
world into /root/.gradle.
To avoid the problem, just do not call gradle if the effective user id
is 0.
The client was built with Meson, the server with Gradle, and were run by
a Makefile.
Add a Meson script for the server (which delegates to Gradle), and a
parent script to build and install both the client and the server to the
system, typically with:
meson --buildtype release build
cd build
ninja
sudo ninja install
In addition, use a separate Makefile to build a "portable" version of
the application (where the client expects the server to be in the
current directory). Typically:
make release-portable
cd dist/scrcpy
./scrcpy
This is especially useful for Windows builds, which are not "installed".
