From 5041bab9f8731b72e3e65789a0d6165c59d64a2f Mon Sep 17 00:00:00 2001
From: momo5502 <mauriceheumann@gmail.com>
Date: Thu, 29 May 2025 09:44:04 +0200
Subject: [PATCH] Setup sccache

---
 .github/workflows/build.yml                      | 16 ++++++++++++++++
 CMakeLists.txt                                   |  3 +++
 cmake/sccache.cmake                              | 15 +++++++++++++++
 .../icicle-emulator/icicle-bridge/CMakeLists.txt |  7 ++++++-
 4 files changed, 40 insertions(+), 1 deletion(-)
 create mode 100644 cmake/sccache.cmake

diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 27fe8104..61a10823 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -86,6 +86,14 @@ jobs:
       - name: Enable Developer Command Prompt
         uses: ilammy/msvc-dev-cmd@v1.13.0
 
+      - name: Run sccache-cache
+        uses: mozilla-actions/sccache-action@v0.0.8
+
+      - name: Setup Environment Variables
+        shell: bash
+        run: |
+          echo "SCCACHE_GHA_ENABLED=true" >> $GITHUB_ENV
+
       - name: CMake Build
         run: cmake --preset=release && cmake --build --preset=release -t dump-apiset
 
@@ -255,7 +263,15 @@ jobs:
           ndk-version: r26d
           add-to-path: false
 
+      - name: Run sccache-cache
+        uses: mozilla-actions/sccache-action@v0.0.8
+
       - name: Setup Environment Variables
+        shell: bash
+        run: |
+          echo "SCCACHE_GHA_ENABLED=true" >> $GITHUB_ENV
+
+      - name: Setup Android Environment Variables
         shell: bash
         if: ${{ startsWith(matrix.platform, 'Android') }}
         run: |
diff --git a/CMakeLists.txt b/CMakeLists.txt
index ec3e355d..3ddb0b99 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -29,6 +29,9 @@ endif()
 # It doesn't support it, even if it thinks it does...
 set(ENV{ARCHFLAGS} "nope")
 
+##########################################
+
+include(cmake/sccache.cmake)
 
 ##########################################
 
diff --git a/cmake/sccache.cmake b/cmake/sccache.cmake
new file mode 100644
index 00000000..4c442585
--- /dev/null
+++ b/cmake/sccache.cmake
@@ -0,0 +1,15 @@
+include_guard()
+
+if(CMAKE_GENERATOR STREQUAL "Ninja")
+    find_program(SCCACHE sccache REQUIRED)
+
+    if (SCCACHE)
+        set(CMAKE_C_COMPILER_LAUNCHER ${SCCACHE})
+        set(CMAKE_CXX_COMPILER_LAUNCHER ${SCCACHE})
+        set(CMAKE_MSVC_DEBUG_INFORMATION_FORMAT Embedded)
+
+        if(POLICY CMP0141)
+            cmake_policy(SET CMP0141 NEW)
+        endif()
+    endif()
+endif()
diff --git a/src/backends/icicle-emulator/icicle-bridge/CMakeLists.txt b/src/backends/icicle-emulator/icicle-bridge/CMakeLists.txt
index d64c0d21..8399c7bc 100644
--- a/src/backends/icicle-emulator/icicle-bridge/CMakeLists.txt
+++ b/src/backends/icicle-emulator/icicle-bridge/CMakeLists.txt
@@ -35,13 +35,18 @@ endif()
 
 set(ICICLE_RUST_LIB ${ICICLE_ARTIFACT_DIR}/${ICICLE_RUST_LIBNAME})
 
+set(SCCACHE_ENV "MOMO_DUMMY_ENV=1")
+if (SCCACHE)
+  set(SCCACHE_ENV "RUSTC_WRAPPER=${SCCACHE}")
+endif()
+
 ExternalProject_Add(
     icicle-rust-project
     PREFIX ${CMAKE_CURRENT_BINARY_DIR}
     SOURCE_DIR ${CMAKE_CURRENT_LIST_DIR}
     BINARY_DIR ${CMAKE_CURRENT_LIST_DIR}
     CONFIGURE_COMMAND ""
-    BUILD_COMMAND ${CMAKE_COMMAND} -E env "CARGO_TARGET_DIR=${ICICLE_BUILD_DIR}" cargo build ${CARGO_OPTIONS} --lib --profile $<IF:$<CONFIG:Debug>,dev,release>
+    BUILD_COMMAND ${CMAKE_COMMAND} -E env "CARGO_TARGET_DIR=${ICICLE_BUILD_DIR}" "${SCCACHE_ENV}" -- cargo build ${CARGO_OPTIONS} --lib --profile $<IF:$<CONFIG:Debug>,dev,release>
     INSTALL_COMMAND ""
     USES_TERMINAL_CONFIGURE 1
     USES_TERMINAL_BUILD 1