Support Purpur and Pufferfish config repos & optimize server.properties handling (#3914)

scripts/start-deployPufferfish

@@ -41,6 +41,11 @@ if [[ ! -f "$SERVER" ]] || isTrue "${FORCE_REDOWNLOAD:-false}"; then
       exit 3
     fi
 fi
+if [[ "${PUFFERFISH_CONFIG_REPO}" ]]; then
+  defaultTopLevelConfigs=(bukkit.yml spigot.yml pufferfish.yml)
+  DOWNLOAD_DEFAULTS=$(buildDownloadList "$PUFFERFISH_CONFIG_REPO" "$VERSION" "${defaultTopLevelConfigs[@]}")
+  export DOWNLOAD_DEFAULTS
+fi
 
 # Normalize on Spigot for later operations
 export FAMILY=SPIGOT

scripts/start-deployPurpur

@@ -4,6 +4,7 @@ IFS=$'\n\t'
 
 : "${PURPUR_BUILD:=LATEST}"
 : "${PURPUR_DOWNLOAD_URL:=}"
+: "${PURPUR_CONFIG_REPO:=}"
 
 # shellcheck source=start-utils
 . "$(dirname "$0")/start-utils"
@@ -36,6 +37,12 @@ fi
 
 applyResultsFile ${resultsFile}
 
+if [[ "${PURPUR_CONFIG_REPO}" ]]; then
+  defaultTopLevelConfigs=(bukkit.yml spigot.yml purpur.yml)
+  DOWNLOAD_DEFAULTS=$(buildDownloadList "$PURPUR_CONFIG_REPO" "$VERSION" "${defaultTopLevelConfigs[@]}")
+  export DOWNLOAD_DEFAULTS
+fi
+
 # Normalize on Spigot for later operations
 export FAMILY=SPIGOT
 

scripts/start-setupServerProperties

@@ -134,6 +134,22 @@ if [[ ${TYPE} == "CURSEFORGE" ]]; then
 fi
 
 if ! isTrue "${SKIP_SERVER_PROPERTIES}"; then
+  if [ ! -e "$SERVER_PROPERTIES" ] && [[ "${SERVER_PROPERTIES_REPO_URL:-}" ]]; then
+    # Helper to support base URLs (like the config repos)
+    # If the URL doesn't end in .properties, assume it is a base and append version/file
+    if [[ "${SERVER_PROPERTIES_REPO_URL}" != *".properties" ]]; then
+      SERVER_PROPERTIES_REPO_URL=$(buildDownloadList "$SERVER_PROPERTIES_REPO_URL" "$VERSION" server.properties)
+    fi
+
+    if ! mc-image-helper mcopy \
+      --to "$(dirname "$SERVER_PROPERTIES")" \
+      --skip-existing \
+      --ignore-missing-sources \
+      "$SERVER_PROPERTIES_REPO_URL"; then
+      logWarning "Failed to download server.properties from ${SERVER_PROPERTIES_REPO_URL}"
+    fi
+  fi
+
   if [ ! -e "$SERVER_PROPERTIES" ]; then
     log "Creating server properties in ${SERVER_PROPERTIES}"