From 38a7f7ada01a5aefb0b1683e008d325dc6675440 Mon Sep 17 00:00:00 2001
From: Mark Stemm <mark.stemm@gmail.com>
Date: Fri, 15 Oct 2021 16:33:12 -0700
Subject: [PATCH] cmake/build changes for plugins

Add a cmake module "plugins" that does the following:

 - Downloads/installs the plugins artifacts from a known tag
 - Copies the resulting cloudtrail/json shared libraries to
   CMAKE_CURRENT_BINARY_DIR/plugins
 - Installs them to FALCO_SHARE_DIR/plugins

The default config will define the plugins but they will be disabled
by default.

Co-authored-by: Leonardo Grasso <me@leonardograsso.com>
Co-authored-by: Loris Degioanni <loris@sysdig.com>
Signed-off-by: Mark Stemm <mark.stemm@gmail.com>
---
 CMakeLists.txt                    |  3 +++
 cmake/modules/plugins.cmake       | 36 +++++++++++++++++++++++++++++++
 tests/CMakeLists.txt              |  2 ++
 userspace/falco/config_falco.h.in |  1 +
 4 files changed, 42 insertions(+)
 create mode 100644 cmake/modules/plugins.cmake

diff --git a/CMakeLists.txt b/CMakeLists.txt
index a0e43e95..4eeaa103 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -212,6 +212,7 @@ include(static-analysis)
 # Shared build variables
 set(FALCO_SINSP_LIBRARY sinsp)
 set(FALCO_SHARE_DIR share/falco)
+set(FALCO_PLUGINS_DIR ${FALCO_SHARE_DIR}/plugins)
 set(FALCO_ABSOLUTE_SHARE_DIR "${CMAKE_INSTALL_PREFIX}/${FALCO_SHARE_DIR}")
 set(FALCO_BIN_DIR bin)
 
@@ -220,5 +221,7 @@ add_subdirectory(userspace/engine)
 add_subdirectory(userspace/falco)
 add_subdirectory(tests)
 
+include(plugins)
+
 # Packages configuration
 include(CPackConfig)
diff --git a/cmake/modules/plugins.cmake b/cmake/modules/plugins.cmake
new file mode 100644
index 00000000..e5479c1f
--- /dev/null
+++ b/cmake/modules/plugins.cmake
@@ -0,0 +1,36 @@
+#
+# Copyright (C) 2021 The Falco Authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with
+# the License. You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the
+# specific language governing permissions and limitations under the License.
+#
+
+include(ExternalProject)
+
+set(PLUGINS_VERSION "0.1.0-rc1-28-g019437e")
+
+ExternalProject_Add(
+  cloudtrail-plugin
+  URL "https://download.falco.org/plugins/dev/cloudtrail-${PLUGINS_VERSION}-${CMAKE_HOST_SYSTEM_PROCESSOR}.tar.gz"
+  URL_HASH "SHA256=ad9692957c5435238e07d1625e1b247eabe98b85f54de9218367fdd73a6f3f0b"
+  CONFIGURE_COMMAND ""
+  BUILD_COMMAND ""
+  INSTALL_COMMAND "")
+
+install(FILES "${PROJECT_BINARY_DIR}/cloudtrail-plugin-prefix/src/cloudtrail-plugin/libcloudtrail.so" DESTINATION "${FALCO_PLUGINS_DIR}")
+
+ExternalProject_Add(
+  json-plugin
+  URL "https://download.falco.org/plugins/dev/json-${PLUGINS_VERSION}-${CMAKE_HOST_SYSTEM_PROCESSOR}.tar.gz"
+  URL_HASH "SHA256=721ea5226b0f623915d0d5c34870589ad33a8ff795b0daa1af72f21a67430077"
+  CONFIGURE_COMMAND ""
+  BUILD_COMMAND ""
+  INSTALL_COMMAND "")
+
+install(FILES "${PROJECT_BINARY_DIR}/json-plugin-prefix/src/json-plugin/libjson.so" DESTINATION "${FALCO_PLUGINS_DIR}")
diff --git a/tests/CMakeLists.txt b/tests/CMakeLists.txt
index dfb87fb8..b0318095 100644
--- a/tests/CMakeLists.txt
+++ b/tests/CMakeLists.txt
@@ -46,6 +46,7 @@ if(FALCO_BUILD_TESTS)
       PUBLIC "${CATCH2_INCLUDE}"
             "${FAKEIT_INCLUDE}"
             "${PROJECT_SOURCE_DIR}/userspace/engine"
+            "${PROJECT_BINARY_DIR}/userspace/falco"
             "${YAMLCPP_INCLUDE_DIR}"
             "${PROJECT_SOURCE_DIR}/userspace/falco")
   else()
@@ -54,6 +55,7 @@ if(FALCO_BUILD_TESTS)
       PUBLIC "${CATCH2_INCLUDE}"
             "${FAKEIT_INCLUDE}"
             "${PROJECT_SOURCE_DIR}/userspace/engine"
+            "${PROJECT_BINARY_DIR}/userspace/falco"
             "${YAMLCPP_INCLUDE_DIR}"
             "${CIVETWEB_INCLUDE_DIR}"
             "${PROJECT_SOURCE_DIR}/userspace/falco")
diff --git a/userspace/falco/config_falco.h.in b/userspace/falco/config_falco.h.in
index 1b95dae6..cd74a83a 100644
--- a/userspace/falco/config_falco.h.in
+++ b/userspace/falco/config_falco.h.in
@@ -28,6 +28,7 @@ limitations under the License.
 #define FALCO_SOURCE_DIR "${PROJECT_SOURCE_DIR}"
 #define FALCO_SOURCE_CONF_FILE "${PROJECT_SOURCE_DIR}/falco.yaml"
 #define FALCO_INSTALL_CONF_FILE "/etc/falco/falco.yaml"
+#define FALCO_ENGINE_PLUGINS_DIR "${FALCO_ABSOLUTE_SHARE_DIR}/plugins/"
 
 #define PROBE_NAME "@PROBE_NAME@"
 #define DRIVER_VERSION "@PROBE_VERSION@"
\ No newline at end of file