From 1a4a4b49b4545c9f3ccd864cb2f3b2908efe90cb Mon Sep 17 00:00:00 2001
From: Mason Tran <mason.tran@silabs.com>
Date: Tue, 28 May 2024 14:47:57 -0400
Subject: [PATCH] [script] add `ccache` to build script to speed up builds when
 possible

---
 .github/workflows/build.yml | 11 +++++++++++
 script/bootstrap            |  2 ++
 script/build                |  4 +++-
 3 files changed, 16 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 5a428645..4222ed7f 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -63,6 +63,14 @@ jobs:
       with:
         submodules: true
 
+    - name: ccache
+      uses: hendrikmuhs/ccache-action@v1.2
+      with:
+        key: ${{ matrix.gcc_ver }}
+
+    - name: Zero ccache stats
+      run: ccache -z
+
     - name: Create LFS file hash list
       run: git -C third_party/silabs/gecko_sdk lfs ls-files -l | cut -d' ' -f1 | sort > .lfs-assets-id
 
@@ -85,6 +93,9 @@ jobs:
         export PATH=${HOME}/.local/${{ matrix.gcc_extract_dir }}/bin:$PATH
         script/test
 
+    - name: Print ccache stats
+      run: ccache -s
+
     - name: Gather SLC generated files
       if: failure()
       run: |
diff --git a/script/bootstrap b/script/bootstrap
index e2694c2c..9b64de4a 100755
--- a/script/bootstrap
+++ b/script/bootstrap
@@ -48,6 +48,7 @@ install_packages_apt()
     # Install dependencies
     sudo apt-get update
     apt_packages=(
+        ccache
         coreutils
         git
         git-lfs
@@ -77,6 +78,7 @@ install_packages_brew()
     echo 'Installing script dependencies...'
 
     brew_packages=(
+        ccache
         coreutils
         git
         git-lfs
diff --git a/script/build b/script/build
index 7793bc41..488f225d 100755
--- a/script/build
+++ b/script/build
@@ -220,7 +220,9 @@ build_soc()
         -DOT_APP_RCP=OFF \
         -DOT_COMPILE_WARNING_AS_ERROR=ON \
         "$@" "${repo_dir}" \
-        --graphviz=graph.dot
+        --graphviz=graph.dot \
+        -DCMAKE_CXX_COMPILER_LAUNCHER=ccache \
+        -DCMAKE_C_COMPILER_LAUNCHER=ccache
 
     ninja "${soc_targets[@]}"