CI: Maintenance

- Rename .travis dir to .ci, since it isn't just for Travis
- Convert Linux build scripts to posix sh
- Clean up some scripts per shellcheck

.ci/build-linux.sh

@@ -0,0 +1,58 @@
+#!/bin/sh -ex
+
+# Setup Qt variables
+export QT_BASE_DIR=/opt/qt${QTVERMIN}
+export PATH=$QT_BASE_DIR/bin:$PATH
+export LD_LIBRARY_PATH=$QT_BASE_DIR/lib/x86_64-linux-gnu:$QT_BASE_DIR/lib
+
+cd rpcs3 || exit 1
+
+# Pull all the submodules except llvm, since it is built separately and we just download that build
+# Note: Tried to use git submodule status, but it takes over 20 seconds
+# shellcheck disable=SC2046
+git submodule -q update --init $(awk '/path/ && !/llvm/ { print $3 }' .gitmodules)
+
+# Download pre-compiled llvm libs
+curl -sLO https://github.com/RPCS3/llvm-mirror/releases/download/custom-build/llvmlibs-linux.tar.gz
+mkdir llvmlibs
+tar -xzf ./llvmlibs-linux.tar.gz -C llvmlibs
+
+mkdir build && cd build || exit 1
+
+if [ "$COMPILER" = "gcc" ]; then
+	# These are set in the dockerfile
+	export CC=${GCC_BINARY}
+	export CXX=${GXX_BINARY}
+	export LINKER=gold
+	# We need to set the following variables for LTO to link properly
+	export AR=/usr/bin/gcc-ar-9
+	export RANLIB=/usr/bin/gcc-ranlib-9
+	export CFLAGS="-fuse-linker-plugin"
+else
+	export CC=${CLANG_BINARY}
+	export CXX=${CLANGXX_BINARY}
+	export LINKER=lld
+	export AR=/usr/bin/llvm-ar-$LLVMVER
+	export RANLIB=/usr/bin/llvm-ranlib-$LLVMVER
+fi
+
+export CFLAGS="$CFLAGS -fuse-ld=${LINKER}"
+
+cmake .. -DCMAKE_INSTALL_PREFIX=/usr -DBUILD_LLVM_SUBMODULE=OFF -DUSE_COTIRE=OFF -DLLVM_DIR=llvmlibs/lib/cmake/llvm/ -DUSE_NATIVE_INSTRUCTIONS=OFF \
+  -DCMAKE_C_FLAGS="$CFLAGS" -DCMAKE_CXX_FLAGS="$CFLAGS" -DCMAKE_AR=$AR -DCMAKE_RANLIB=$RANLIB \
+  -G Ninja
+
+ninja; build_status=$?;
+
+cd ..
+
+# If it compiled succesfully let's deploy depending on the build pipeline (Travis, Azure Pipelines).
+# Travis only deploys on master, and it publishes to GitHub releases. Azure publishes PRs as artifacts
+# only.
+{   [ "$IS_AZURE" = "true" ] ||
+	{ [ "$TRAVIS_BRANCH" = "master" ] && [ "$TRAVIS_PULL_REQUEST" = "false" ]; };
+} && SHOULD_DEPLOY="true" || SHOULD_DEPLOY="false"
+
+if [ "$build_status" -eq 0 ] && [ "$SHOULD_DEPLOY" = "true" ]; then
+	.ci/deploy-linux.sh
+fi