From 62fdd69d856e8eafa6526dd60107d8240d65e0e3 Mon Sep 17 00:00:00 2001
From: jiayuehua <3423893+jiayuehua@users.noreply.github.com>
Date: Mon, 17 Jan 2022 17:13:15 +0800
Subject: [PATCH] Support more compiler launchers: distcc sccache

---
 CMakeLists.txt                      |  2 +-
 cmake/nebula/CcacheConfig.cmake     | 16 ----------------
 cmake/nebula/CompilerLauncher.cmake | 29 +++++++++++++++++++++++++++++
 3 files changed, 30 insertions(+), 17 deletions(-)
 delete mode 100644 cmake/nebula/CcacheConfig.cmake
 create mode 100644 cmake/nebula/CompilerLauncher.cmake

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 2e6729faa47..8198e11d418 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -44,7 +44,7 @@ include(GeneralCMakeOptions)
 include(GeneralCMakeConfig)
 include(GeneralCompilerConfig)
 include(LinkerConfig)
-include(CcacheConfig)
+include(CompilerLauncher)
 include(ThirdPartyConfig)
 include(SanitizerConfig)
 include(GitHooksConfig)
diff --git a/cmake/nebula/CcacheConfig.cmake b/cmake/nebula/CcacheConfig.cmake
deleted file mode 100644
index ad0816bdb77..00000000000
--- a/cmake/nebula/CcacheConfig.cmake
+++ /dev/null
@@ -1,16 +0,0 @@
-# To detect if ccache is available
-find_program(ccache_program_found "ccache")
-if (ENABLE_CCACHE AND ccache_program_found)
-    if (NOT $ENV{CCACHE_DIR} STREQUAL "")
-        message(STATUS "CCACHE_DIR                      : $ENV{CCACHE_DIR}")
-    else()
-        message(STATUS "CCACHE_DIR                      : $ENV{HOME}/.ccache")
-    endif()
-    set(CMAKE_CXX_COMPILER_LAUNCHER "ccache")
-elseif (ENABLE_CCACHE)
-    message(STATUS "CCACHE                              : Enabled but not found")
-    set(CMAKE_CXX_COMPILER_LAUNCHER)
-else ()
-    message(STATUS "CCACHE                              : OFF")
-    set(CMAKE_CXX_COMPILER_LAUNCHER)
-endif()
diff --git a/cmake/nebula/CompilerLauncher.cmake b/cmake/nebula/CompilerLauncher.cmake
new file mode 100644
index 00000000000..2295e857934
--- /dev/null
+++ b/cmake/nebula/CompilerLauncher.cmake
@@ -0,0 +1,29 @@
+option(ENABLE_COMPILER_LAUNCHER "Using compiler launcher if available" ON)
+if(NOT ENABLE_COMPILER_LAUNCHER)
+  return()
+endif()
+
+set(COMPILER_LAUNCHER_OPTION
+    "ccache"
+    CACHE STRING "Compiler cache to be used")
+set(COMPILER_LAUNCHER_OPTION_VALUES "ccache" "sccache" "distcc")
+set_property(CACHE COMPILER_LAUNCHER_OPTION PROPERTY STRINGS ${COMPILER_LAUNCHER_OPTION_VALUES})
+list(
+  FIND
+  COMPILER_LAUNCHER_OPTION_VALUES
+  ${COMPILER_LAUNCHER_OPTION}
+  COMPILER_LAUNCHER_OPTION_INDEX)
+
+if(${COMPILER_LAUNCHER_OPTION_INDEX} EQUAL -1)
+  message(
+    STATUS
+      "Using custom compiler launcher system: '${COMPILER_LAUNCHER_OPTION}', explicitly supported entries are ${COMPILER_LAUNCHER_OPTION_VALUES}")
+endif()
+
+find_program(COMPILER_LAUNCHER_BINARY ${COMPILER_LAUNCHER_OPTION})
+if(COMPILER_LAUNCHER_BINARY)
+  message(STATUS "${COMPILER_LAUNCHER_OPTION} found and enabled")
+  set(CMAKE_CXX_COMPILER_LAUNCHER ${COMPILER_LAUNCHER_BINARY})
+else()
+  message(WARNING "${COMPILER_LAUNCHER_OPTION} is enabled but was not found. Not using it")
+endif()