OpenShift 4.x Release Viewer Graph

ocr.sh

#!/bin/bash 

# Requires JQ installed. 
# curl -sH 'Accept: application/json'  https://api.openshift.com/api/upgrades_info/v1/graph?channel=stable-4.1&arch=amd64 | jq -S '.nodes | sort_by(.version)' 


PS3='Please enter your choice: '

# The names of the channels currently need to be hardcoded as there is no way to get a list of what current channels are avaiable. 
# https://github.com/openshift/cincinnati/issues/171#issuecomment-555626636
# Channels not listed prerelease-4.1 candidate-4.2

#version=( "4.1" "4.2" "4.3" "4.4" "4.5")

version=( "4.3" "4.4" "4.5" "4.6")
channel=( "candidate" "fast" "stable" )
mapfile -t options < <(for v in ${version[@]}; do for i in ${channel[@]}; do echo "$i-$v"; done; done)

# Now that there are channels fro archetures, might what to add an option for arch. 

_Command () {
  echo "Showing upgrade channel: ${channel}"
  curl -sH 'Accept: application/json'  "https://api.openshift.com/api/upgrades_info/v1/graph?channel=${channel}&arch=amd64" | jq -S '.nodes | sort_by(.version | gsub ("[a-z,A-Z,-]";"") | split(".") | map(tonumber)) | .[]'
}

if ! [ -x "$(command -v jq)" ]; then
  echo 'Error: jq is not installed.' >&2
  exit 1
fi


select opt in "${options[@]}"
do
  channel="${opt}"
  _Command
  break 
done