Publish portable nextcloud-whiteboard chart

scripts/chart-version.sh

@@ -0,0 +1,35 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+repo_dir=$(cd -- "$(dirname -- "${BASH_SOURCE[0]}")/.." && pwd)
+description=$(git -C "$repo_dir" describe --tags --long --dirty)
+case "$description" in
+  *-dirty) echo 'Refusing to package a dirty tree.' >&2; exit 1 ;;
+esac
+if [[ "$description" =~ ^(.+)-([0-9]+)-g([0-9a-f]+)$ ]]; then
+  release_tag=${BASH_REMATCH[1]}
+  count=${BASH_REMATCH[2]}
+  hash=${BASH_REMATCH[3]}
+else
+  echo "Unexpected git describe result: $description" >&2
+  exit 1
+fi
+
+case "$release_tag" in
+  v[0-9]*)
+    version=${release_tag#v}
+    ;;
+  [0-9]*_[0-9]*)
+    date=${release_tag%%_*}
+    time=${release_tag#*_}
+    version="${date}.0.0-r${time}"
+    ;;
+  *)
+    echo "Unsupported application release tag: $release_tag" >&2
+    exit 1
+    ;;
+esac
+if [ "$count" -ne 0 ]; then
+  version="$version-$count-g$hash"
+fi
+printf '%s\n' "$version"