chore: Add sonar-scan analysis on pushes.

We can't run this on pull requests because it needs access to the
`SONAR_TOKEN` secret. Perhaps in the future we can make it a
`pull_request_target` workflow, but then we can't use cmake to initialise
the environment, meaning we need to specify the inputs manually.

.github/scripts/cmake-freebsd-stage2

@@ -26,8 +26,6 @@ scp -o UserKnownHostsFile=/dev/null -o StrictHostKeyChecking=no -P "$SSH_PORT" -
 RUN ls -lh
 
 cd /c-toxcore
-CACHEDIR=/opt/cache
-mkdir "$CACHEDIR"
 . ".github/scripts/flags-clang.sh"
 
 add_ld_flag -Wl,-z,defs

.github/scripts/cmake-linux

@@ -2,7 +2,6 @@
 
 set -eu
 
-CACHEDIR="$HOME/cache"
 NPROC=$(nproc)
 
 sudo apt-get install -y --no-install-recommends libopus-dev libsodium-dev libvpx-dev ninja-build

.github/scripts/cmake-osx

@@ -2,7 +2,6 @@
 
 set -eu
 
-CACHEDIR="$HOME/cache"
 NPROC=$(sysctl -n hw.physicalcpu)
 
 # Workaround for bug in Homebrew where it only finds an old Ruby version.

.github/scripts/cmake-windows.sh

@@ -4,7 +4,6 @@ ACTION="$1"
 
 set -eu
 
-CACHEDIR="$HOME/cache"
 NPROC=$(nproc)
 
 ci_install() {

.github/scripts/flags.sh

@@ -9,9 +9,6 @@ add_flag() {
   add_cxx_flag "$@"
 }
 
-export LD_LIBRARY_PATH="$CACHEDIR/lib"
-export PKG_CONFIG_PATH="$CACHEDIR/lib/pkgconfig"
-
 # Our own flags which we can insert in the correct place. We don't use CFLAGS
 # and friends here (we unset them below), because they influence config tests
 # such as ./configure and cmake tests. Our warning flags break those tests, so

.github/scripts/sonar-build

@@ -0,0 +1,7 @@
+#!/bin/bash
+
+set -eu
+
+. ".github/scripts/flags-gcc.sh"
+
+cmake --build _build --parallel "$(nproc)" --target install -- -k 0

.github/scripts/sonar-prepare

@@ -0,0 +1,27 @@
+#!/bin/bash
+
+set -eu
+
+sudo apt-get install -y --no-install-recommends libconfig-dev libopus-dev libsodium-dev libvpx-dev ninja-build
+
+. ".github/scripts/flags-gcc.sh"
+
+add_ld_flag -Wl,-z,defs
+
+# Make compilation error on a warning
+add_flag -Werror
+
+cmake -B_build -H. -GNinja \
+  -DCMAKE_C_FLAGS="$C_FLAGS" \
+  -DCMAKE_CXX_FLAGS="$CXX_FLAGS" \
+  -DCMAKE_EXE_LINKER_FLAGS="$LD_FLAGS" \
+  -DCMAKE_SHARED_LINKER_FLAGS="$LD_FLAGS" \
+  -DCMAKE_INSTALL_PREFIX:PATH="$PWD/_install" \
+  -DMIN_LOGGER_LEVEL=TRACE \
+  -DMUST_BUILD_TOXAV=ON \
+  -DNON_HERMETIC_TESTS=OFF \
+  -DSTRICT_ABI=ON \
+  -DTEST_TIMEOUT_SECONDS=120 \
+  -DUSE_IPV6=OFF \
+  -DAUTOTEST=ON \
+  -DENABLE_SHARED=OFF