ci: Add Kitware ninja v1.11.1

This commit adds the Kitware ninja v1.11.1 to the CI Docker image.

The Kitware fork of ninja is required to enable the "jobserver" feature,
which is currently not available in the upstream ninja codebase.

The ninja jobserver client feature is used by the Zephyr CI workflow in
conjunction with the twister-side jobserver to globally limit the number
of parallel compilations, which is necessary to keep the runner RAM
usage under control.

Note that Kitware ninja is currently only included in the x86-64 image
because pre-compiled AArch64 binary is not available -- for AArch64, the
distro-provided vanilla ninja will be used.

Signed-off-by: Stephanos Ioannidis <[email protected]>

Dockerfile.ci

@@ -5,6 +5,8 @@ FROM ${BASE_IMAGE:-zephyrprojectrtos/ci-base:latest}
 
 ARG ZSDK_VERSION=0.16.5-1
 ENV ZSDK_VERSION=$ZSDK_VERSION
+ARG KITWARE_NINJA_VERSION=1.11.1.g95dee.kitware.jobserver-1
+ENV KITWARE_NINJA_VERSION=$KITWARE_NINJA_VERSION
 ARG DOXYGEN_VERSION=1.9.4
 ENV DOXYGEN_VERSION=$DOXYGEN_VERSION
 ARG RENODE_VERSION=1.14.0
@@ -27,6 +29,14 @@ ARG FVP_CORSTONE310_VERSION=11.24_13
 ENV FVP_CORSTONE310_VERSION=$FVP_CORSTONE310_VERSION
 ARG WGET_ARGS="-q --show-progress --progress=bar:force:noscroll"
 
+# Install Kitware ninja
+# NOTE: Pre-built Kitware ninja binaries are only available for x86_64 host.
+RUN if [ "${HOSTTYPE}" = "x86_64" ]; then \
+	wget ${WGET_ARGS} https://github.com/Kitware/ninja/releases/download/v${KITWARE_NINJA_VERSION}/ninja-${KITWARE_NINJA_VERSION}_x86_64-linux-gnu.tar.gz && \
+	tar xf ninja-${KITWARE_NINJA_VERSION}_x86_64-linux-gnu.tar.gz -C /opt && \
+	ln -s /opt/ninja-${KITWARE_NINJA_VERSION}_x86_64-linux-gnu/ninja /usr/local/bin && \
+	rm ninja-${KITWARE_NINJA_VERSION}_x86_64-linux-gnu.tar.gz \
+	; fi
 
 # Install Doxygen (x86 only)
 # NOTE: Pre-built Doxygen binaries are only available for x86_64 host.