From a34fb4018cb90f3227bde008ff690f84b4602ed8 Mon Sep 17 00:00:00 2001
From: Christopher Hong <chrishong294@gmail.com>
Date: Wed, 17 Jan 2024 19:32:48 -0500
Subject: [PATCH 1/2] Add idempotency to external absl mod

---
 CMakeLists.txt | 18 +++++++++++-------
 1 file changed, 11 insertions(+), 7 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 3a989bf6..9fa37fa8 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -163,16 +163,20 @@ elseif (SPM_ABSL_PROVIDER STREQUAL "module")
         SOURCE_DIR ${CMAKE_CURRENT_SOURCE_DIR}/third_party/abseil-cpp
         GIT_PROGRESS TRUE)
   add_subdirectory(third_party/abseil-cpp)
-  file(RENAME ${CMAKE_CURRENT_SOURCE_DIR}/third_party/absl ${CMAKE_CURRENT_SOURCE_DIR}/third_party/absl.org)
-  execute_process(COMMAND ${CMAKE_COMMAND} -E create_symlink
-    ${CMAKE_CURRENT_SOURCE_DIR}/third_party/abseil-cpp/absl
-    ${CMAKE_CURRENT_SOURCE_DIR}/third_party/absl)
+  if (NOT EXISTS ${CMAKE_CURRENT_SOURCE_DIR}/third_party/absl.org)
+    file(RENAME ${CMAKE_CURRENT_SOURCE_DIR}/third_party/absl ${CMAKE_CURRENT_SOURCE_DIR}/third_party/absl.org)
+    execute_process(COMMAND ${CMAKE_COMMAND} -E create_symlink
+      ${CMAKE_CURRENT_SOURCE_DIR}/third_party/abseil-cpp/absl
+      ${CMAKE_CURRENT_SOURCE_DIR}/third_party/absl)
+  endif()
 elseif (SPM_ABSL_PROVIDER STREQUAL "package")
   find_package(absl REQUIRED)
   get_target_property(ABSL_INCLUDE_DIRS absl::base INTERFACE_INCLUDE_DIRECTORIES)
-  file(RENAME ${CMAKE_CURRENT_SOURCE_DIR}/third_party/absl ${CMAKE_CURRENT_SOURCE_DIR}/third_party/absl.org)
-  execute_process(COMMAND ${CMAKE_COMMAND} -E create_symlink
-      ${ABSL_INCLUDE_DIRS}/absl ${CMAKE_CURRENT_SOURCE_DIR}/third_party/absl)
+  if (NOT EXISTS ${CMAKE_CURRENT_SOURCE_DIR}/third_party/absl.org)
+    file(RENAME ${CMAKE_CURRENT_SOURCE_DIR}/third_party/absl ${CMAKE_CURRENT_SOURCE_DIR}/third_party/absl.org)
+    execute_process(COMMAND ${CMAKE_COMMAND} -E create_symlink
+        ${ABSL_INCLUDE_DIRS}/absl ${CMAKE_CURRENT_SOURCE_DIR}/third_party/absl)
+  endif()
   include_directories(${ABSL_INCLUDE_DIRS})
 endif()
 

From 0ea22c03e262a41de522c344f3abb08cc3e1452c Mon Sep 17 00:00:00 2001
From: Christopher Hong <chrishong294@gmail.com>
Date: Wed, 17 Jan 2024 19:33:51 -0500
Subject: [PATCH 2/2] Fix build for external absl

---
 src/CMakeLists.txt | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index beb7aa57..8d4a34f4 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -18,6 +18,8 @@ if (SPM_ABSL_PROVIDER STREQUAL "module" OR SPM_ABSL_PROVIDER STREQUAL "package")
   list(APPEND SPM_LIBS absl::strings)
   list(APPEND SPM_LIBS absl::flags)
   list(APPEND SPM_LIBS absl::flags_parse)
+  list(APPEND SPM_LIBS absl::log)
+  list(APPEND SPM_LIBS absl::check)
   if (MSVC)
    add_definitions("/D_USE_EXTERNAL_ABSL")
   else()