add dockerfile build for test tool

.gitignore

@@ -1 +1,2 @@
 /build
+jsmn

Dockerfile

@@ -0,0 +1,68 @@
+# syntax=docker/dockerfile:1.6.0
+FROM ubuntu:22.04 as build
+
+# github action workflow step: Install dependencies
+RUN <<EOF
+    apt-get update
+    # dependencies already installed in the github action ubuntu-latest base
+    # image - we need to install them here separately
+    apt-get install --no-install-recommends -y \
+        ca-certificates \
+        git \
+        build-essential \
+        cmake
+    # dependencies from github action workflow
+    apt-get install --no-install-recommends -y \
+        clang-tools \
+        libcmocka-dev \
+        libhttp-parser-dev \
+        libmbedtls-dev \
+        lcov
+    apt-get clean
+    rm -rf /var/lib/apt/lists/*
+EOF
+
+WORKDIR /cmender
+COPY CMakeLists.txt /cmender
+COPY cmake cmake/
+COPY include include/
+COPY src src/
+COPY platform platform/
+COPY tests tests/
+
+# github action workflow step: Install jsmn
+RUN <<EOF
+    git clone https://github.com/zserge/jsmn.git
+    make -C jsmn
+EOF
+ENV CFLAGS="$CFLAGS -isystem /cmender/jsmn"
+ENV LDFLAGS="$LDFLAGS -L/cmender/jsmn"
+
+# github action workflow step: Compile
+RUN <<EOF
+    mkdir build
+    cmake -S . -B build -DCMAKE_BUILD_TYPE=Debug -DENABLE_TESTING=ON -DCODE_COVERAGE=ON
+    make -C build
+EOF
+
+# github action workflow step: Test
+RUN <<EOF
+    make -C build test ARGS="-V"
+    make -C build test_coverage
+EOF
+
+# minimal image with test_tool
+FROM scratch
+WORKDIR /lib64
+COPY --from=build /lib64/ld-linux-x86-64.so.2 .
+WORKDIR /lib/x86_64-linux-gnu
+COPY --from=build /lib/x86_64-linux-gnu/libmbedtls.so.14 .
+COPY --from=build /lib/x86_64-linux-gnu/libmbedcrypto.so.7 .
+COPY --from=build /lib/x86_64-linux-gnu/libmbedx509.so.1 .
+COPY --from=build /lib/x86_64-linux-gnu/libhttp_parser.so.2.9 .
+COPY --from=build /lib/x86_64-linux-gnu/libcmocka.so.0 .
+COPY --from=build /lib/x86_64-linux-gnu/libc.so.6 .
+COPY --from=build /lib/x86_64-linux-gnu/librt.so.1 .
+WORKDIR /
+COPY --from=build /cmender/build/platform/linux/test_tool/test_tool .
+ENTRYPOINT ["/test_tool"]

README.md

@@ -75,7 +75,12 @@ make
 
 ### One-time setup
 
-* Build the client
+* Build the client, or build container image when running macOS (container image only tested on intel macs):
+
+```bash
+docker build -t cmender-test-tool .
+```
+
 * Create menderstore directory:
 
 ```bash
@@ -106,6 +111,12 @@ start the test client with the following command and display the help:
 ./platform/linux/test_tool/test_tool -h
 ```
 
+Or via docker:
+
+```bash
+docker run -v ./data:/data cmender-test-tool -h
+```
+
 After a deployment the test tool exits instead of a reboot a real device
 would do. Start the test tool again but set the artifact name to the deployed
 version. After that the server should indicate a successful deployment.