new: [collabora,nextcloud] add ``upstream-versions`` hook

collabora/hooks/upstream-versions

@@ -0,0 +1,49 @@
+#!/bin/bash
+
+## List upstream available versions in reverse chronological order
+##
+## These versions information will be the input for the version information
+## usually used by the build process.
+## A external query of upstream sources will be done.
+##
+
+## This script is launched by ``charm upstream-versions`` and will receive these env variables
+##
+##
+##  VERSION_LIMIT   ## limit number of version to read
+##
+##
+## The script CWD will be the root of the charm directory
+##
+
+DOCKER_IMAGE_NAME=collabora/code
+
+semver:normalize() {
+    local upstream_version="$1"
+    local version="${upstream_version/./}"
+    read -r year_month major minor patch <<< ${version//./ }
+    if ! [ "${#patch}" == 1 ]; then
+        echo "Error: build number is not a single digit: '${patch}' (upstream: '${upstream_version}')" >&2
+        return 1
+    fi
+    if [ "${#major}" -gt 2 ]; then
+        echo "Error: major number is more than 2 digits: '${major}' (upstream: '${upstream_version}')" >&2 
+        return 1
+    fi
+    major=$(printf "%02d" ${major})
+    echo "${year_month}${major}.${minor}.${patch}"
+}
+
+
+upstream:list() {
+    local limit=${1:-5}
+    docker-tags-fetch "$DOCKER_IMAGE_NAME" -l "${limit}" -f "^[0-9]+\.[0-9]+\.[0-9]+\.[0-9]+\.[0-9]+" |
+        sort -rV |
+        cut -f 1 -d "-"
+}
+
+
+while read -r "upstream_version"; do
+    normalized_version=$(semver:normalize "${upstream_version}") || exit 1
+    printf "%s %s\n" "$(semver:normalize "${upstream_version}")" "$upstream_version"
+done < <(upstream:list "${VERSION_LIMIT}")

nextcloud/hooks/upstream-versions

@@ -0,0 +1,37 @@
+#!/bin/bash
+
+## List upstream available versions in reverse chronological order
+##
+## These versions information will be the input for the version information
+## usually used by the build process.
+## A external query of upstream sources will be done.
+##
+
+## This script is launched by ``charm upstream-versions`` and will receive these env variables
+##
+##
+##  VERSION_LIMIT   ## limit number of version to read
+##
+##
+## The script CWD will be the root of the charm directory
+##
+
+DOCKER_IMAGE_NAME=nextcloud
+
+semver:normalize() {
+    local upstream_version="$1"
+    echo "$upstream_version"
+}
+
+
+upstream:list() {
+    local limit=${1:-5}
+    docker-tags-fetch "$DOCKER_IMAGE_NAME" -l "${limit}" -f "^[0-9]+\.[0-9]+\.[0-9]+-apache" |
+        sort -rV |
+        cut -f 1 -d "-"
+}
+
+
+while read -r "upstream_version"; do
+    printf "%s %s\n" "$(semver:normalize "${upstream_version}")" "$upstream_version"
+done < <(upstream:list "${VERSION_LIMIT}")