feat: Add make step to help finding the correct stable branch

[nickvergessen]

No description provided.

[max-nextcloud]

Snippet to test if branch supports nextcloud version

git show origin/stable1:appinfo/info.xml | xmllint --xpath '//dependencies/nextcloud[@min-version<=23][23<=@max-version]' -
  <nextcloud min-version="23" max-version="24"/>
git show origin/stable1:appinfo/info.xml | xmllint --xpath '//dependencies/nextcloud[@min-version<=26][26<=@max-version]' -
  XPath set is empty

[nickvergessen]

The problem is some apps do stableX, some stable-X some stable-A.B and it's impossible to guess/iterate in scripts over all branches, or even having to clone/download them all.

[max-nextcloud]

Would this do the trick?

export REPO='nextcloud/collectives'
export VERSION=23
git clone --depth=1 https://github.com/$REPO.git
cd collectives
for branch in `git ls-remote -q --heads  | grep -o 'refs\/heads\/stable.*' | grep -o stable.* | sort -nr`
  do
  curl -s https://raw.githubusercontent.com/$REPO/$branch/appinfo/info.xml \
  | xmllint --xpath '//dependencies/nextcloud[@min-version<=$VERSION][$VERSION<=@max-version]' - \
  && echo $branch
done

[nickvergessen]

Thanks for all the pointing. That contained some useful hints and I now have a universal thing that works with already locally cloned fork based on git show $REF_ID:appinfo/info.xml

#!/bin/bash
#
# Checkout the newest matching stable branch

VERSION=$1

DEFAULT_BRANCH=$(git symbolic-ref refs/remotes/origin/HEAD | sed 's@^refs/remotes/origin/@@')

# Check default (main/master) branch 
git fetch -q origin $DEFAULT_BRANCH
REF_ID=$(git ls-remote -q --heads | grep "refs\/heads\/$DEFAULT_BRANCH\$" | tail | awk '{ print $1 }')

MATCHES=$(git show $REF_ID:appinfo/info.xml | xmllint --nowarning --xpath "count(/info/dependencies/nextcloud[@min-version<=$VERSION][$VERSION<=@max-version])" -)

if [ "$MATCHES" == "1" ]; then
  echo $DEFAULT_BRANCH
  exit 0
fi

# Short cut to stableX when X is the version we are looking for
MATCHES=$(git ls-remote -q --heads | grep "refs\/heads\/stable$VERSION\$" | wc -l)
if [ "$MATCHES" == "1" ]; then
  echo "stable$VERSION"
  exit 0
fi

for branch in `git ls-remote -q --heads  | grep -o 'refs\/heads\/stable.*' | grep -o stable.* | sort -nr`
do
  git fetch -q origin $branch
  REF_ID=$(git ls-remote -q --heads | grep "refs\/heads\/$branch\$" | tail | awk '{ print $1 }')

  MATCHES=$(git show $REF_ID:appinfo/info.xml | xmllint --nowarning --xpath "count(/info/dependencies/nextcloud[@min-version<=$VERSION][$VERSION<=@max-version])" -)

  if [ "$MATCHES" == "1" ]; then
    echo $branch
    exit 0
  fi

done

exit 1