.travis.yml: add tests for installing rpm packages on fuse-overlayfs

Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com>

.travis.yml

@@ -1,3 +1,5 @@
+services:
+  - docker
 language: c
 sudo: required
 dist: trusty
@@ -16,6 +18,7 @@ addons:
       - g++
       - python3-setuptools
 before_install:
+  - docker pull fedora &
   - sudo mkdir -p /lower /upper /mnt
   - (cd /; sudo git clone https://github.com/amir73il/unionmount-testsuite.git)
   - (git clone git://github.com/ninja-build/ninja.git && cd ninja && python3.5 ./bootstrap.py && sudo cp ninja /usr/bin)
@@ -28,3 +31,4 @@ script:
   - sudo make -j install; sudo cp fuse-overlayfs /sbin
   - (cd /unionmount-testsuite; sudo ./run --ov --fuse=fuse-overlayfs --xdev)
   - (cd /unionmount-testsuite; FUSE_OVERLAYFS_DISABLE_OVL_WHITEOUT=1 sudo -E ./run --ov --fuse=fuse-overlayfs --xdev)
+  - sudo tests/fedora-installs.sh

tests/fedora-installs.sh

@@ -0,0 +1,21 @@
+#!/bin/sh
+
+mkdir lower upper workdir merged
+
+fuse-overlayfs -o lowerdir=lower,upperdir=upper,workdir=workdir,suid,dev merged
+
+docker run --rm -ti -v merged:/merged fedora dnf --installroot /merged --releasever 29 install -y glibc-common
+
+umount merged
+
+# Make sure workdir is empty, and move the upper layer down
+rm -rf workdir lower
+mv upper lower
+mkdir upper workdir
+
+fuse-overlayfs -o lowerdir=lower,upperdir=upper,workdir=workdir,suid,dev merged
+
+# Install some big packages
+docker run --rm -ti -v merged:/merged fedora dnf --installroot /merged --releasever 29 install -y emacs texlive
+
+umount merged