[RFC PATCH] tests/docker: add a debian-native image and make available

["Alex Bennée" <alex.bennee@linaro.org>]

This image is intended for building whatever the native versions of
QEMU are for the host architecture. This will hopefully be an aid for
3rd parties who want to be able to build QEMU themselves without
redoing all the dependencies themselves.

We disable the registry because we currently don't have multi-arch
support there.

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Cc: Anders Roxell <anders.roxell@linaro.org>
---
 tests/docker/Makefile.include                 |  4 ++
 tests/docker/common.rc                        | 10 +++-
 tests/docker/dockerfiles/debian-native.docker | 49 +++++++++++++++++++
 3 files changed, 61 insertions(+), 2 deletions(-)
 create mode 100644 tests/docker/dockerfiles/debian-native.docker

diff --git a/tests/docker/Makefile.include b/tests/docker/Makefile.include
index 3b03763186..2f276cc4b2 100644
--- a/tests/docker/Makefile.include
+++ b/tests/docker/Makefile.include
@@ -145,6 +145,10 @@ docker-image-debian-s390x-cross: docker-image-debian10
 docker-image-debian-sh4-cross: docker-image-debian10
 docker-image-debian-sparc64-cross: docker-image-debian10
 
+# The native build should never use the registry
+docker-image-debian-native: DOCKER_REGISTRY=
+
+
 #
 # The build rule for hexagon-cross is special in so far for most of
 # the time we don't want to build it. While dockers caching does avoid
diff --git a/tests/docker/common.rc b/tests/docker/common.rc
index c5cc33d366..e6f8cee0d6 100755
--- a/tests/docker/common.rc
+++ b/tests/docker/common.rc
@@ -12,8 +12,14 @@
 # the top-level directory.
 
 # This might be set by ENV of a docker container... it is always
-# overriden by TARGET_LIST if the user sets it.
-DEF_TARGET_LIST=${DEF_TARGET_LIST:-"x86_64-softmmu,aarch64-softmmu"}
+# overriden by TARGET_LIST if the user sets it. We special case
+# "none" to allow for other options like --disable-tcg to restrict the
+# builds we eventually do.
+if test "$DEF_TARGET_LIST" = "none"; then
+    DEF_TARGET_LIST=""
+else
+    DEF_TARGET_LIST=${DEF_TARGET_LIST:-"x86_64-softmmu,aarch64-softmmu"}
+fi
 
 requires_binary()
 {
diff --git a/tests/docker/dockerfiles/debian-native.docker b/tests/docker/dockerfiles/debian-native.docker
new file mode 100644
index 0000000000..efd55cb6e0
--- /dev/null
+++ b/tests/docker/dockerfiles/debian-native.docker
@@ -0,0 +1,49 @@
+#
+# Docker Debian Native
+#
+# This this intended to build QEMU on native host systems. Debian is
+# chosen due to the broadest range on supported host systems for QEMU.
+#
+# This docker target is based on the docker.io Debian Bullseye base
+# image rather than QEMU's base because we would otherwise confuse the
+# build grabbing stuff from the registry built for other
+# architectures.
+#
+FROM docker.io/library/debian:bullseye-slim
+MAINTAINER Alex Bennée <alex.bennee@linaro.org>
+
+# Duplicate deb line as deb-src
+RUN cat /etc/apt/sources.list | sed "s/^deb\ /deb-src /" >> /etc/apt/sources.list
+
+# Install common build utilities
+RUN apt update && \
+    DEBIAN_FRONTEND=noninteractive apt install -yy eatmydata
+
+RUN apt update && \
+    DEBIAN_FRONTEND=noninteractive eatmydata \
+    apt build-dep -yy --arch-only qemu
+
+RUN apt update && \
+    DEBIAN_FRONTEND=noninteractive eatmydata \
+    apt install -y --no-install-recommends \
+        cscope \
+        genisoimage \
+        exuberant-ctags \
+        global \
+        libbz2-dev \
+        liblzo2-dev \
+        libgcrypt20-dev \
+        libfdt-dev \
+        librdmacm-dev \
+        libsasl2-dev \
+        libsnappy-dev \
+        libvte-dev \
+        netcat-openbsd \
+        ninja-build \
+        openssh-client \
+        python3-numpy \
+        python3-opencv \
+        python3-venv
+
+ENV QEMU_CONFIGURE_OPTS $QEMU_CONFIGURE_OPTS
+ENV DEF_TARGET_LIST "none"
-- 
2.30.2