[Qemu-devel] [PATCH 3/9] docker: Generate /packages.txt in ubuntu image

[Fam Zheng <famz@redhat.com>]

Put the list of package names in an environment, and output their
package names to the target file in the end.

Signed-off-by: Fam Zheng <famz@redhat.com>
---
 tests/docker/dockerfiles/ubuntu.docker | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/tests/docker/dockerfiles/ubuntu.docker b/tests/docker/dockerfiles/ubuntu.docker
index a8b88c3..a360a05 100644
--- a/tests/docker/dockerfiles/ubuntu.docker
+++ b/tests/docker/dockerfiles/ubuntu.docker
@@ -2,10 +2,12 @@ FROM ubuntu:14.04
 RUN echo "deb http://archive.ubuntu.com/ubuntu/ trusty universe multiverse" >> \
     /etc/apt/sources.list
 RUN apt-get update
-RUN apt-get -y install flex bison \
+ENV PACKAGES flex bison \
     libusb-1.0-0-dev libiscsi-dev librados-dev libncurses5-dev \
     libseccomp-dev libgnutls-dev libssh2-1-dev  libspice-server-dev \
     libspice-protocol-dev libnss3-dev libfdt-dev \
     libgtk-3-dev libvte-2.90-dev libsdl1.2-dev libpng12-dev libpixman-1-dev \
     git make ccache python-yaml gcc clang sparse
+RUN apt-get -y install $PACKAGES
+RUN dpkg -l $PACKAGES | sort > /packages.txt
 ENV FEATURES clang pyyaml
-- 
2.7.4