lib: import generic helpers from upgrades

lib/build.sh

@@ -0,0 +1,33 @@
+#!/bin/bash
+# Copyright 2024 The Forgejo Authors
+# SPDX-License-Identifier: MIT
+
+set -ex
+
+SELF_DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
+
+version=$1
+DIR=$2
+
+v=$(echo $version | sed -E -e 's/^([0-9]+\.[0-9]+).*/\1/')
+read url ref semver < $SELF_DIR/../forgejo/sources/$v
+
+if ! test -d $DIR/src ; then
+    mkdir -p $DIR/src
+    cd $DIR/src
+    git init
+    git remote add origin $url
+else
+    cd $DIR/src
+fi
+
+if ! [[ "$ref" =~ ^refs/ ]] ; then
+    ref=refs/heads/$ref
+fi
+git fetch --update-head-ok origin +$ref:$ref
+git switch --force-create $v $ref
+
+export TAGS="bindata sqlite sqlite_unlock_notify" FORGEJO_VERSION=$semver
+make deps-backend backend
+make generate forgejo
+cp -a forgejo $DIR/forgejo-$v-dev