feat: complete production backend integration

2026-06-02 20:51:57 +02:00
parent d3f2fd69db
commit 4b531a4c24
20 changed files with 853 additions and 40 deletions
@@ -3,6 +3,16 @@ set -eu

 BASE_DIR="/usr/local/hitme_plugins/global-autoresponders"
 STATE_FILE="$BASE_DIR/config/backend-state.json"
+PLUGIN_DIR="/usr/local/directadmin/plugins/global-autoresponder"
+CUSTOM_DIR="/usr/local/directadmin/custombuild/custom/exim"
+CUSTOM_CONF="$CUSTOM_DIR/exim.conf"
+SOURCE_CONF="/usr/local/directadmin/custombuild/configure/exim/exim.conf"
+ROUTER_SNIPPET="$PLUGIN_DIR/scripts/exim/global_autoresponder_router.conf"
+TRANSPORT_SNIPPET="$PLUGIN_DIR/scripts/exim/global_autoresponder_transport.conf"
+ROLLBACK_ACTIVE=0
+ROLLBACK_CREATED=0
+ROLLBACK_REBUILD=0
+ROLLBACK_FILE=

 usage() {
  echo "Usage: scripts/backend.sh da|exim" >&2
@@ -16,21 +26,161 @@ fi
 mkdir -p "$BASE_DIR/config" "$BASE_DIR/data" "$BASE_DIR/state" "$BASE_DIR/logs"
 chmod 700 "$BASE_DIR/config" "$BASE_DIR/logs"

+write_state() {
+  backend="$1"
+  printf '{"active_backend":"%s","migration_status":"complete"}\n' "$backend" > "$STATE_FILE"
+  chmod 600 "$STATE_FILE"
+}
+
+remove_marked_block() {
+  marker="$1"
+  file="$2"
+  tmp="${file}.global-autoresponder.$$"
+  awk -v marker="$marker" '
+    $0 == "# BEGIN global-autoresponder " marker { skip=1; next }
+    $0 == "# END global-autoresponder " marker { skip=0; next }
+    skip != 1 { print }
+  ' "$file" > "$tmp"
+  mv "$tmp" "$file"
+}
+
+insert_after_section() {
+  section="$1"
+  snippet="$2"
+  file="$3"
+  tmp="${file}.global-autoresponder.$$"
+  if ! awk -v section="$section" -v snippet="$snippet" '
+    BEGIN {
+      while ((getline line < snippet) > 0) {
+        block = block line "\n"
+      }
+      close(snippet)
+    }
+    { print }
+    $0 == section && inserted != 1 {
+      printf "\n%s\n", block
+      inserted = 1
+    }
+    END {
+      if (inserted != 1) {
+        exit 3
+      }
+    }
+  ' "$file" > "$tmp"; then
+    rm -f "$tmp"
+    echo "Cannot install exim backend: section $section not found in custom exim.conf." >&2
+    exit 1
+  fi
+  mv "$tmp" "$file"
+}
+
+backup_custom_conf() {
+  mkdir -p "$CUSTOM_DIR"
+  ROLLBACK_FILE="${CUSTOM_CONF}.global-autoresponder.backup.$$"
+  if [ -f "$CUSTOM_CONF" ]; then
+    cp "$CUSTOM_CONF" "$ROLLBACK_FILE"
+    ROLLBACK_CREATED=0
+  else
+    : > "$ROLLBACK_FILE"
+    ROLLBACK_CREATED=1
+  fi
+  ROLLBACK_ACTIVE=1
+}
+
+restore_custom_conf() {
+  if [ "$ROLLBACK_ACTIVE" != "1" ]; then
+    return
+  fi
+  set +e
+  if [ "$ROLLBACK_CREATED" = "1" ]; then
+    rm -f "$CUSTOM_CONF"
+  else
+    cp "$ROLLBACK_FILE" "$CUSTOM_CONF"
+  fi
+  rm -f "$ROLLBACK_FILE"
+  if [ "$ROLLBACK_REBUILD" = "1" ]; then
+    rebuild_and_reload_exim >/dev/null 2>&1
+  fi
+  ROLLBACK_ACTIVE=0
+}
+
+commit_custom_conf() {
+  rm -f "$ROLLBACK_FILE"
+  ROLLBACK_ACTIVE=0
+  ROLLBACK_CREATED=0
+  ROLLBACK_REBUILD=0
+}
+
+trap 'restore_custom_conf' EXIT
+trap 'restore_custom_conf; exit 1' HUP INT TERM
+
+validate_exim_conf() {
+  if command -v exim >/dev/null 2>&1; then
+    exim -C "$CUSTOM_CONF" -bV >/dev/null
+  elif command -v exim4 >/dev/null 2>&1; then
+    exim4 -C "$CUSTOM_CONF" -bV >/dev/null
+  else
+    echo "Cannot validate exim backend: exim binary not found." >&2
+    exit 1
+  fi
+}
+
+rebuild_and_reload_exim() {
+  if command -v da >/dev/null 2>&1; then
+    da build exim_conf
+  elif [ -x /usr/local/directadmin/custombuild/build ]; then
+    /usr/local/directadmin/custombuild/build exim_conf
+  else
+    echo "Cannot rebuild exim configuration: da/build command not found." >&2
+    exit 1
+  fi
+  if command -v systemctl >/dev/null 2>&1; then
+    systemctl reload exim 2>/dev/null || systemctl restart exim
+  else
+    service exim reload 2>/dev/null || service exim restart
+  fi
+}
+
 if [ "$1" = "da" ]; then
-  cat > "$STATE_FILE" <<'EOF'
-{"active_backend":"da","migration_status":"complete"}
-EOF
+  if [ -f "$CUSTOM_CONF" ]; then
+    backup_custom_conf
+    remove_marked_block "router" "$CUSTOM_CONF"
+    remove_marked_block "transport" "$CUSTOM_CONF"
+    if grep -Fq "global_autoresponder_" "$CUSTOM_CONF"; then
+      echo "Cannot switch to da: plugin Exim markers were not removed cleanly." >&2
+      exit 1
+    fi
+    validate_exim_conf
+    ROLLBACK_REBUILD=1
+    rebuild_and_reload_exim
+    commit_custom_conf
+  fi
+  write_state "da"
  echo "Backend set to da"
  exit 0
 fi

-CUSTOM_DIR="/usr/local/directadmin/custombuild/custom/exim"
-if [ ! -d "$CUSTOM_DIR" ]; then
-  echo "Cannot enable exim backend: safe CustomBuild exim customization directory not found." >&2
+if [ ! -d "$(dirname "$SOURCE_CONF")" ]; then
+  echo "Cannot enable exim backend: DirectAdmin CustomBuild exim source config not found." >&2
+  exit 1
+fi
+if [ ! -f "$ROUTER_SNIPPET" ] || [ ! -f "$TRANSPORT_SNIPPET" ]; then
+  echo "Cannot enable exim backend: plugin Exim snippets are missing." >&2
  exit 1
 fi

-cat > "$STATE_FILE" <<'EOF'
-{"active_backend":"exim","migration_status":"pending_exim_validation"}
-EOF
-echo "Backend prepared for exim; validate Exim customization before production use."
+backup_custom_conf
+if [ ! -f "$CUSTOM_CONF" ]; then
+  cp "$SOURCE_CONF" "$CUSTOM_CONF"
+fi
+
+remove_marked_block "router" "$CUSTOM_CONF"
+remove_marked_block "transport" "$CUSTOM_CONF"
+insert_after_section "begin routers" "$ROUTER_SNIPPET" "$CUSTOM_CONF"
+insert_after_section "begin transports" "$TRANSPORT_SNIPPET" "$CUSTOM_CONF"
+validate_exim_conf
+ROLLBACK_REBUILD=1
+rebuild_and_reload_exim
+commit_custom_conf
+write_state "exim"
+echo "Backend set to exim"