Script for building VCV Rack 2.4.1 with my improved (low-latency) PulseAudio anti-glitching fix applied.

vcvbuild.sh

#!/bin/bash

Fail()
{
    echo "vcvbuild.sh: $1"
    exit 1
}

CloneVcv()
{
    git clone https://github.com/VCVRack/Rack.git $1 || Fail "Could not clone VCV Rack source into: $1"
    git clone https://github.com/VCVRack/Fundamental.git $1/plugins/Fundamental || Fail "Could not clone VCV Fundamental repo into: $1/plugins/Fundamental"
    pushd $1 > /dev/null || Fail "CloneVcv - error changing directory to: $1"
    git submodule update --init --recursive || Fail "Could not fetch submodules into: $1"
    git checkout --recurse-submodules -b donfix $2 || Fail "Could not check out tag: $2"

    if [[ -z "$3" ]]; then
        echo "vcvbuild.sh: Keeping latest version of Fundamental modules."
    else
        # Hack to work around "taylor5" function rename.
        cd plugins/Fundamental
        git checkout $3 || Fail "CloneVcv - error checking out Fundamental commit: $3"
    fi

    popd > /dev/null || Fail "CloneVcv - popd"
}

ApplyGlitchFix()
{
    pushd "$1/src" > /dev/null || Fail "ApplyGlitchFix cannot change to directory: $1/src"
    cat > fix.patch << EOF
diff --git a/src/rtaudio.cpp b/src/rtaudio.cpp
index 09686a3b..a937d445 100644
--- a/src/rtaudio.cpp
+++ b/src/rtaudio.cpp
@@ -94,7 +94,7 @@ struct RtAudioDevice : audio::Device {
 		options = RtAudio::StreamOptions();
 		// options.flags |= RTAUDIO_MINIMIZE_LATENCY;
 		options.flags |= RTAUDIO_SCHEDULE_REALTIME;
-		options.numberOfBuffers = 2;
+		options.numberOfBuffers = 4;
 		options.streamName = "VCV Rack";
 
 		int32_t closestSampleRate = deviceInfo.preferredSampleRate;
EOF
    git apply fix.patch || Fail "Error applying patch."
    rm -f fix.patch
    popd > /dev/null || Fail "ApplyGlitchFix - popd"
}

BuildVcv()
{
    pushd "$1" > /dev/null || Fail "BuildVcv - error changing directory to: $1"
    make dep || Fail "BuildVcv - error making dependencies"
    make || Fail "BuildVcv - error making Rack"
    cd plugins/Fundamental || "BuildVcv - error changing directory to: $1/plugins/Fundamental"
    make || Fail "BuildVcv - error making Fundamental"
    make dist || Fail "BuildVcv error making Fundamental dist"
    cd ../.. || "BuildVcv - error changing back to ../.."
    make dist || Fail "BuildVcv - error making Rack dist"
    popd > /dev/null || Fail "BuildVcv - popd"
}

#-------------------------------------------------------------------------------

VCVBUILDDIR=${PWD}/build
VCVTAG=v2.4.1
FUNDAMENTALTAG=""

# Nuke and re-create directory for building Rack from source.
rm -rf "${VCVBUILDDIR}"
[[ -e "${VCVBUILDDIR}" ]] && Fail "Cannot delete existing build directory"
mkdir -pv "${VCVBUILDDIR}" || Fail "Could not create build directory"

CloneVcv "${VCVBUILDDIR}" "${VCVTAG}" "${FUNDAMENTALTAG}"
ApplyGlitchFix "${VCVBUILDDIR}"
BuildVcv "${VCVBUILDDIR}"

echo "vcvbuild.sh: Unzipping final build..."
unzip -q build/dist/RackFree-2.*-lin-x64.zip || exit 1
ls -l

echo "vcvbuild.sh: SUCCESS - you can move the Rack2Free directory manually and run from there."
exit 0