feat(helm): Add optional apt-get install to superset_bootstrap.sh

[danielewood]

SUMMARY

Changes the helm template to make calling both pip and apt-get install conditional on packages/requirements being present.

Allows easy extension of Superset by an end user to include packages that may not be suitable for baseline superset. Also makes testing and iteration a bit faster.

TEST PLAN

In existing superset:master:

cd helm/superset
helm dependency update
helm template -s templates/secret-superset-config.yaml . \
  | ggrep -oP '\s+superset_bootstrap\.sh: \K.+' \
  | base64 -d

Expected output:

#!/bin/sh

pip install psycopg2==2.8.5 redis==3.2.1 

---

In PR branch:

cd helm/superset
helm dependency update
helm template -s templates/secret-superset-config.yaml . \
  | ggrep -oP '\s+superset_bootstrap\.sh: \K.+' \
  | base64 -d

Expected output:

#!/bin/sh

pip install psycopg2==2.8.5 redis==3.2.1 

---

Now, the changes:

Run:

helm template -s templates/secret-superset-config.yaml . -f - <<<\
"
additionalAptPackages:
  - socat
  - nano
additionalRequirements: 
  - Authlib
" \
  | ggrep -oP '\s+superset_bootstrap\.sh: \K.+' \
  | base64 -d

Expected output:

#!/bin/sh

apt-get update -y \
  && apt-get install -y --no-install-recommends \
     socat nano \
  && rm -rf /var/lib/apt/lists/*

pip install Authlib 

---

Finally, removing both lists:

helm template -s templates/secret-superset-config.yaml . -f - <<<\
"
additionalAptPackages: {}
additionalRequirements: {}
" \
  | ggrep -oP '\s+superset_bootstrap\.sh: \K.+' \
  | base64 -d

Expected output:

#!/bin/sh

ADDITIONAL INFORMATION

• Has associated issue:
• Changes UI
• Requires DB Migration.
• Confirm DB Migration upgrade and downgrade tested.
• Introduces new feature or API
• Removes existing feature or API