I have two packages;

1. msgsrv_pkg - holds the custom messages and services
   
2. motordriverpkg - a driver package that interfaces with the drives in the robot
   

I'm trying to generate debian for both the packages. motordriverpkg depends on msgsrvpkg.
I ran bloom-generate rosdebian which generated the debian folders for both the packages. Then I executed dpkg-buildpackage -b -us on msgsrvpkg which generated debian for the package without any issue. I followed this question. I created a rosdep file and added to /etc/ros/rosdep/source.list.d/50-my-packages.list and ran rosdep update got the following output.

reading in sources list data from /etc/ros/rosdep/sources.list.d
Hit https://raw.githubusercontent.com/magazino/pylon_camera/indigo-devel/rosdep/pylon_sdk.yaml
Hit https://raw.githubusercontent.com/ros/rosdistro/master/rosdep/osx-homebrew.yaml
Hit https://raw.githubusercontent.com/ros/rosdistro/master/rosdep/base.yaml
Hit https://raw.githubusercontent.com/ros/rosdistro/master/rosdep/python.yaml
Hit https://raw.githubusercontent.com/ros/rosdistro/master/rosdep/ruby.yaml
Hit https://raw.githubusercontent.com/ros/rosdistro/master/releases/fuerte.yaml
Hit file:///home/user/my-ros-pkgs.yaml
Query rosdistro index https://raw.githubusercontent.com/ros/rosdistro/master/index-v4.yaml
Skip end-of-life distro "ardent"
Add distro "bouncy"
Add distro "crystal"
Skip end-of-life distro "groovy"
Skip end-of-life distro "hydro"
Add distro "indigo"
Skip end-of-life distro "jade"
Add distro "kinetic"
Add distro "lunar"
Add distro "melodic"
updated cache in /home/user/.ros/rosdep/sources.cache

Then I executed the dpkg-buildpackage -b -us on the motordriverpkg. It fails because the package is not installed in /opt/ros/melodic/

Also, I tried the two things to overcome this problem.

1) Researching more about the dpkg-build package help, I executed the following command in dpkg-buildpackage; dpkg-buildpackage -b -d -us and it failed.

2) Another option was to create an environment variable and add it with a sudo apt install -y $TEST_INSTALL where TEST_INSTALL looks like the following,

TEST_INSTALL=$(dpkg-checkbuilddeps 2>&1 | sed "s/dpkg-checkbuilddeps:\serror:\sUnmet build dependencies: //g" | sed "s/[\(][^)]*[\)] //g")

Should I use a docker container to do these builds just for the sake of generating a debian and tear it down ? Any help on this will be greatly appreciated.

Thanks !