tests/docker: add docs FEATURE flag and use for test-misc

The test-misc docker test fails on a number of images which don't have
the prerequisites to build the docs. Use the FEATURES flag so we can
skip those tests.

As the sphinx test fails to detect whatever feature we need to get
hxtool to work we drop them from debian9 so the windows build doesn't
attempt to build the docs.

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20200414200631.12799-7-alex.bennee@linaro.org>

tests/docker/dockerfiles/debian10.docker

@@ -34,3 +34,5 @@ RUN apt update && \
         python3-sphinx \
         texinfo \
         $(apt-get -s build-dep qemu | egrep ^Inst | fgrep '[all]' | cut -d\  -f2)
+
+ENV FEATURES docs

tests/docker/dockerfiles/debian9.docker

@@ -30,6 +30,4 @@ RUN apt update && \
         pkg-config \
         psmisc \
         python3 \
-        python3-sphinx \
-        texinfo \
         $(apt-get -s build-dep qemu | egrep ^Inst | fgrep '[all]' | cut -d\  -f2)

tests/docker/dockerfiles/fedora.docker

@@ -103,4 +103,4 @@ ENV QEMU_CONFIGURE_OPTS --python=/usr/bin/python3
 RUN dnf install -y $PACKAGES
 RUN rpm -q $PACKAGES | sort > /packages.txt
 ENV PATH $PATH:/usr/libexec/python3-sphinx/
-ENV FEATURES mingw clang pyyaml asan
+ENV FEATURES mingw clang pyyaml asan docs

tests/docker/dockerfiles/travis.docker

@@ -13,5 +13,5 @@ RUN apt-get -y install device-tree-compiler python3 python3-yaml dh-autoreconf g
 # Travis tools require PhantomJS / Neo4j / Maven accessible
 # in their PATH (QEMU build won't access them).
 ENV PATH /usr/local/phantomjs/bin:/usr/local/phantomjs:/usr/local/neo4j-3.2.7/bin:/usr/local/maven-3.5.2/bin:/usr/local/cmake-3.9.2/bin:/usr/local/clang-5.0.0/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
-ENV FEATURES clang pyyaml
+ENV FEATURES clang pyyaml docs
 USER travis

tests/docker/dockerfiles/ubuntu.docker

@@ -68,4 +68,4 @@ ENV PACKAGES flex bison \
 RUN apt-get update && \
     DEBIAN_FRONTEND=noninteractive apt-get -y install $PACKAGES
 RUN dpkg -l $PACKAGES | sort > /packages.txt
-ENV FEATURES clang pyyaml sdl2
+ENV FEATURES clang pyyaml sdl2 docs

tests/docker/dockerfiles/ubuntu1804.docker

@@ -54,7 +54,7 @@ ENV PACKAGES flex bison \
 RUN apt-get update && \
     DEBIAN_FRONTEND=noninteractive apt-get -y install $PACKAGES
 RUN dpkg -l $PACKAGES | sort > /packages.txt
-ENV FEATURES clang pyyaml sdl2
+ENV FEATURES clang pyyaml sdl2 docs
 
 # https://bugs.launchpad.net/qemu/+bug/1838763
 ENV QEMU_CONFIGURE_OPTS --disable-libssh

tests/docker/test-misc

@@ -14,6 +14,8 @@
 
 . common.rc
 
+requires docs
+
 cd "$BUILD_DIR"
 
 # build everything else but QEMU