chore: change auto-pr action to create proper PR body for renku pre-releases

[Panaetius]

Needs SwissDataScienceCenter/renku-python#3415 to properly work

closes SwissDataScienceCenter/renku-python#3402

allows setting something like extra-values=global.renku.cli_version=2.4.0rc2 in auto-prs to test with a specific version (this is automatically set by CI with the changes in this PR)

/deploy #persist

[RenkuBot]

You can access the deployment of this PR at https://ci-renku-3044.dev.renku.ch

[olevski]

One small change. Also did you have a chance to test the modified action?

[Panaetius]

I tested the modified action code locally, but haven't tested on Github (it has to be merged anyways before being able to run it, no?). Sometimes jq behaves a bit differently in GH Actions than locally, even using something like act, so I give it a ~70% chance of working out of the box...

I.e. I just tested it with a bash script like

#!/bin/bash
GITHUB_REF=$1
regex='renku-[a-z]+'
[[ ${GITHUB_REF} =~ $regex ]]
pr_repo=$BASH_REMATCH
pr_body="This is an automated pull request.\n\n/deploy"

# get current cli version for core PRs and set PR body for tests to pass
if [ "$pr_repo" == "renku-core" ]; then
   regex='renku-core-([[:digit:]]+\.[[:digit:]]+\.[[:digit:]]+)'
   [[ ${GITHUB_REF} =~ $regex ]]
   core_version=${BASH_REMATCH[1]}
   current_version_maybe_rc=$(curl -s https://pypi.org/pypi/renku/json | jq -r ".releases | keys_unsorted | map(select( . | startswith(\"$core_version\"))) | sort_by(. | split(\"[.]|rc\";\"\") | map(tonumber))[-1]")
   pr_body="$pr_body extra-values=global.renku.cli_version=$current_version_maybe_rc"
fi
echo "$pr_body"

$ ./test.sh "auto-update/renku-core-2.4.0"
This is an automated pull request.\n\n/deploy extra-values=global.renku.cli_version=2.4.0rc2

$ ./test.sh "auto-update/renku-core-2.3.2"
This is an automated pull request.\n\n/deploy extra-values=global.renku.cli_version=2.3.2

$ ./test.sh "auto-update/renku-core-1.11.2"
This is an automated pull request.\n\n/deploy extra-values=global.renku.cli_version=1.11.2

$ ./test.sh "auto-update/renku-gateway-0.19.2"
This is an automated pull request.\n\n/deploy

$ ./test.sh "auto-update/renku-graph-2.31.0"
This is an automated pull request.\n\n/deploy

[rokroskar]

@Panaetius you can change which branch it runs on temporarily to test