Add: [AzurePipeline] introducing a release pipeline

This release pipeline creates all the official release binaries,
and publishes them as artifacts. Currently it can only produce
nightlies and custom builds; stable/testing release binaries are
untested.

This commit also splits up the pipeline in small bits, to both
improve readability, and to share code with the CI pipeline where
possible.

azure-pipelines/manifest.sh

@@ -0,0 +1,60 @@
+#!/bin/sh
+
+set -ex
+
+if [ -z "$1" ]; then
+    echo "Usage: $0 <folder-with-bundles>"
+    exit 1
+fi
+
+FOLDER=$1
+
+if [ ! -e .version ] || [ ! -e .release_date ]; then
+    echo "This script should be executed in the root of an extracted source tarball"
+    exit 1
+fi
+
+# Find the name based on the version
+if [ "${ISSTABLERELEASE}" = "true" ]; then
+    isTesting=$(cat .version | grep "RC\|beta" || true)
+    if [ -z "${isTesting}" ]; then
+        NAME="stable"
+    else
+        NAME="testing"
+    fi
+else
+    NAME=$(cat .version | cut -d- -f2 | cut -d- -f-2)
+fi
+
+# Convert the date to a YAML date
+DATE=$(cat .release_date | tr ' ' T | sed 's/TUTC/:00-00:00/')
+VERSION=$(cat .version)
+BASE="openttd-${VERSION}"
+
+echo "name: ${NAME}" >> manifest.yaml
+echo "date: ${DATE}" >> manifest.yaml
+echo "base: ${BASE}-" >> manifest.yaml
+echo "files:" >> manifest.yaml
+
+error=""
+for i in $(ls ${FOLDER} | grep -v ".txt$\|.md$\|sum$" | sort); do
+    if [ -n "$(echo $i | grep pdb.xz)" ]; then continue; fi
+    if [ -n "$(echo $i | grep dbg.deb)" ]; then continue; fi
+
+    if [ ! -e ${FOLDER}/$i.md5sum ] || [ ! -e ${FOLDER}/$i.sha1sum ] || [ ! -e ${FOLDER}/$i.sha256sum ]; then
+        echo "ERROR: missing checksum file for ${i}" 1>&2
+        error="y"
+        continue
+    fi
+
+    echo "- id: $i" >> manifest.yaml
+    echo "  size: $(stat -c"%s" ${FOLDER}/$i)" >> manifest.yaml
+    echo "  md5sum: $(cat ${FOLDER}/$i.md5sum | cut -d\  -f1)" >> manifest.yaml
+    echo "  sha1sum: $(cat ${FOLDER}/$i.sha1sum | cut -d\  -f1)" >> manifest.yaml
+    echo "  sha256sum: $(cat ${FOLDER}/$i.sha256sum | cut -d\  -f1)" >> manifest.yaml
+done
+
+if [ -n "${error}" ]; then
+    echo "ERROR: exiting due to earlier errors" 1>&2
+    exit 1
+fi