Chef - use env variable with package resource what created with bash resource - ruby

Question

I would get the changed project from git commit and install the package based on this.
Here is my code
bash 'get_project' do
code <<-EOH
filelist=$(git diff-tree --no-commit-id --name-only -r $1)
for file in ${filelist[#]}; do
project=$(echo $file | cut -d "/" -f1)
projectList+=($project)
done
for changedProject in $(echo "${projectList[#]}" | sort | uniq); do
INSTALLABLE_RPM=application-$changedProject
done
EOH
environment 'INSTALLABLE_RPM' => '$INSTALLABLE_RPM'
end
zypper_package ENV['INSTALLABLE_RPM']
My idea is to generate the INSTALLABLE_RPM variable with bash and install the package with zypper. Unfortunately it doesn't work. The zypper_package resource cant recognize.
I ran out of ideas :-(

Answer 1

The environment property of the bash resource is to supply existing environment variables to execute the bash command(s).
(These variables must exist for a command to be run successfully.)
Specifying environment variables here will not set them in the shell. Also from within the code block you will not be able to access the Ruby's ENV hash.
There may not be a straight-forward way to do this. One of the options is to write this package (list?) to a file. Then we can read the file contents into variable, and use it with zypper_package resource.
Example:
Since you have used for loop in Shell, I believe you get a list of packages, so I am considering pkg_list as Array. I've set compile_time to true as the variable assignment below bash resource will only run during compile time.
bash 'get_project' do
code <<-EOH
# your code as-it-is
for changedProject in $(echo "${projectList[#]}" | sort | uniq); do
echo "application-$changedProject" >> /tmp/rpm_packages
done
EOH
compile_time true
end
pkg_list = File.read('/tmp/rpm_packages').split
zypper_package pkg_list
# remove the file for good measure :)
file '/tmp/rpm_packages' do
action :delete
end