Include the full SDK in the Docker image

ncs/Dockerfile

@@ -27,3 +27,21 @@ RUN \
   && apt-get clean \
   && rm -rf /var/lib/apt/lists/* \
   && rm -rf ncs/downloads
+
+WORKDIR /workdir
+
+# Prepare image with a ready to use build environment
+SHELL ["nrfutil","toolchain-manager","launch","/bin/bash","--","-c"]
+RUN <<EOT
+    west init -m https://github.com/nrfconnect/sdk-nrf --mr ${NCS_SDK_VERSION} .
+    if [[ $NCS_VERSION =~ "^[a-fA-F0-9]{32}$" ]]; then
+        git checkout ${NCS_SDK_VERSION};
+    fi
+    west update --narrow -o=--depth=1
+EOT
+
+# Launch into build environment with the passed arguments
+# Currently this is not supported in GitHub Actions
+# See https://github.com/actions/runner/issues/1964
+ENTRYPOINT [ "nrfutil", "toolchain-manager", "launch", "/bin/bash", "--", "/root/entry.sh" ]
+COPY ./ncs/entry.sh /root/entry.sh

ncs/entry.sh

@@ -0,0 +1,3 @@
+#!/bin/bash
+
+exec $@