How to add bc to bitbucket CI? - bitbucket

Question

I am adding pylint to Bitbucket CI. I decided to move with the custom scripts.
bitbucket-pipeline.yml is the following:
image: python:3.6.2
pipelines:
default:
- step:
caches:
- pip
script:
- set -e
- pip install -r requirements.txt
- pip install --upgrade urllib3
- nosetests project1/test
- nosetests project2/test
- pylint --rcfile=.pylintrc --output-format=text project1/report | tee pylint.txt
- score=$(sed -n 's/^Your code has been rated at \([-0-9.]*\)\/.*/\1/p' pylint.txt)
- apt-get install bc
- sh pylint_score.sh
The script for checking pylint score (pylint_score.sh) is below:
#!/usr/sh
score=$(sed -n 's/^Your code has been rated at \([-0-9.]*\)\/.*/\1/p' pylint.txt)
echo "Pylint score was $score"
threshhold=$(echo "$score>8.0" | bc)
echo "$threshhold"
if [ $threshhold -eq 0 ]
then
exit 1
fi
exit 0
The error I am getting:
E: Unable to locate package bc
How can I install bc into Bitbucket CI or there is any workaround to get it work without bc at all?
Initially, I looked on different solutions but it seems that there are neither out-of-the-box solution nor "best practice" guy that everyone implements. Therefore, I moved with my custom implementation.

Answer 1

To resolve my issue, I found Bitbucket ticket.
Inbitbucket-pipeline.yml:
apt-get install bc line should be modified to
apt-get update && apt-get install -y bc
or in some cases to
apt-get update && apt-get install -y --no-install-recommends bc