Add proper bootstrapping for other repos in CI/CD

.github/build/bootstrap.bash

@@ -4,8 +4,52 @@
 # Copyright Ilia Ross <ilia@webmin.dev>
 # Bootstrap the build process
 
-# Source general build functions
-source "./functions.bash" || exit 1
+# Bootstrap URL
+BUILD_BOOTSTRAP_URL="https://raw.githubusercontent.com/webmin/webmin/master/.github/build"
 
-# Source build variables
-source ./environment.bash || exit 1
+# Bootstrap scripts
+BOOTSTRAP_SCRIPTS=(
+    "environment.bash"
+    "functions.bash"
+    "build-deb-module.bash"
+    "build-deb-package.bash"
+    "build-rpm-module.bash"
+    "build-rpm-package.bash"
+)
+
+bootstrap() {
+    local base_url="$BUILD_BOOTSTRAP_URL/"
+    local script_dir
+    script_dir="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+    download_script() {
+	local script_url="$1"
+	local script_path="$2"
+	for downloader in "curl -fsSL" "wget -qO-"; do
+	    if command -v "${downloader%% *}" >/dev/null 2>&1; then
+		if eval "$downloader \"$script_url\" > \"$script_path\""; then
+		    chmod +x "$script_path"
+		    return 0
+		fi
+	    fi
+	done
+	return 1
+    }
+    for script in "${BOOTSTRAP_SCRIPTS[@]}"; do
+	local script_path="$script_dir/$script"
+	if [ ! -f "$script_path" ]; then
+	    if ! download_script "${base_url}${script}" "$script_path"; then
+		echo "Error: Failed to download $script. Cannot continue."
+		exit 1
+	    fi
+	fi
+    done
+
+    # Source general build functions
+    source "$script_dir/functions.bash" || exit 1
+
+    # Source build variables
+    source "$script_dir/environment.bash" || exit 1
+}
+
+# Bootstrap build environment
+bootstrap || exit 1