From 161069bd619d0c1ac4f200214163ff7d5191ccc8 Mon Sep 17 00:00:00 2001
From: Aiden Woodruff <woodra@rpi.edu>
Date: Mon, 23 Jun 2025 13:21:50 -0400
Subject: [PATCH 01/24] add ccache to Github CI

- add ccache config in jobs.build.env.
    - limit cache size to 200mb for now.
    - compression can also be recomputed at the end with -X
- add ccache setup and ccache action (not sure if I will need to change
  to explicit restore/save).
- add CMake ccache argument to config for normal build and examples.
- remove --config from the build step because ninja is a single config
  builder.
- reflow strings for the example projects
- for mpi-nompi example set c_compiler to be safe.

Signed-off-by: Aiden Woodruff <woodra@rpi.edu>
---
 .github/workflows/cmake.yml | 55 ++++++++++++++++++++++++++++++++-----
 1 file changed, 48 insertions(+), 7 deletions(-)

diff --git a/.github/workflows/cmake.yml b/.github/workflows/cmake.yml
index 6580569e7..a36afdf97 100644
--- a/.github/workflows/cmake.yml
+++ b/.github/workflows/cmake.yml
@@ -18,6 +18,11 @@ jobs:
         no_mpi: [OFF, ON]
         cxx_standard: [11, 20]
         metis: [OFF, ON]
+    env:
+      CCACHE_DIR: ${{github.workspace}}
+      CCACHE_BASEDIR: ${{github.workspace}}/.ccache
+      CCACHE_COMPRESS: true
+      CCACHE_MAXSIZE: 200M
 
     steps:
     - uses: actions/checkout@v4
@@ -32,6 +37,21 @@ jobs:
       if: matrix.metis == 'ON'
       run: sudo apt install libmetis-dev
 
+    - name: setup ccache
+      id: setup-ccache
+      run: |
+        sudo apt install ccache
+        ccache -p # Print ccache config
+        ccache -z # Zero ccache statistics
+        echo ::set-output name=key::$(date -u '+%Y-%m-%dT%T')
+
+    - name: ccache
+      uses: actions/cache@v4
+      with:
+        path: ${{github.workspace}}/.ccache
+        key: ${{matrix.compiler.name}}-ccache-${{steps.setup-ccache.outputs.timestamp}}
+        restore-keys: ${{matrix.compiler.name}}-ccache-
+
     - name: Configure CMake
       env:
         MPICH_CXX: ${{matrix.compiler.CXX}}
@@ -41,6 +61,8 @@ jobs:
         -DCMAKE_INSTALL_PREFIX=${{github.workspace}}/build/install
         -GNinja -DCMAKE_VERBOSE_MAKEFILE=ON
         -DCMAKE_BUILD_TYPE=${{matrix.build_type}}
+        -DCMAKE_C_COMPILER_LAUNCHER=ccache
+        -DCMAKE_CXX_COMPILER_LAUNCHER=ccache
         -DCMAKE_CXX_COMPILER=mpicxx -DCMAKE_C_COMPILER=mpicc
         -DCMAKE_CXX_STANDARD=${{matrix.cxx_standard}}
         -DSCOREC_CXX_WARNINGS=ON
@@ -53,7 +75,10 @@ jobs:
       env:
         MPICH_CXX: ${{matrix.compiler.CXX}}
         MPICH_CC: ${{matrix.compiler.CC}}
-      run: cmake --build ${{github.workspace}}/build --config ${{matrix.build_type}} -j --target install
+      run: |
+        cmake
+          --build ${{github.workspace}}/build
+          --target install
 
     - name: Test
       env:
@@ -68,8 +93,16 @@ jobs:
       env:
         MPICH_CXX: ${{matrix.compiler.CXX}}
         MPICH_CC: ${{matrix.compiler.CC}}
-      run: |
-        cmake -S ${{github.workspace}}/doc -B ${{github.workspace}}/buildExample -DCMAKE_CXX_COMPILER=mpicxx -DSCOREC_PREFIX=${{github.workspace}}/build/install
+      run: >
+        cmake
+          -S ${{github.workspace}}/doc
+          -B ${{github.workspace}}/buildExample
+          -DCMAKE_C_COMPILER_LAUNCHER=ccache
+          -DCMAKE_CXX_COMPILER_LAUNCHER=ccache
+          -DCMAKE_C_COMPILER=mpicc
+          -DCMAKE_CXX_COMPILER=mpicxx
+          -DSCOREC_PREFIX=${{github.workspace}}/build/install
+        ;
         cmake --build ${{github.workspace}}/buildExample
 
     - name: Build MPI-NoMPI Example
@@ -81,10 +114,18 @@ jobs:
         MPICH_CXX: ${{matrix.compiler.CXX}}
         MPICH_CC: ${{matrix.compiler.CC}}
       run: >
-        cmake -S ${{github.workspace}}/example/mpi-nompi
-        -B ${{github.workspace}}/example/mpi-nompi/build
-        -DCMAKE_CXX_COMPILER=mpicxx
-        -DSCOREC_PREFIX=${{github.workspace}}/build/install ;
+        cmake
+          -S ${{github.workspace}}/example/mpi-nompi
+          -B ${{github.workspace}}/example/mpi-nompi/build
+          -DCMAKE_C_COMPILER_LAUNCHER=ccache
+          -DCMAKE_CXX_COMPILER_LAUNCHER=ccache
+          -DCMAKE_C_COMPILER=mpicxx
+          -DCMAKE_CXX_COMPILER=mpicxx
+          -DSCOREC_PREFIX=${{github.workspace}}/build/install
+        ;
         cmake --build ${{github.workspace}}/example/mpi-nompi/build ;
         ctest --test-dir ${{github.workspace}}/example/mpi-nompi/build
         --output-on-failure
+
+    - name: CCache statistics
+      run: cmake -sv

From aca94faead5f7a153af61b5c7e15c5c74867d096 Mon Sep 17 00:00:00 2001
From: Aiden Woodruff <woodra@rpi.edu>
Date: Mon, 23 Jun 2025 13:29:49 -0400
Subject: [PATCH 02/24] use $GITHUB_OUTPUT and fix yaml flow

- new $GITHUB_OUTPUT is preferred and ::set-output is deprecated
- reflow jobs.build.steps.build.run to one line now that extra options
  are removed.

Signed-off-by: Aiden Woodruff <woodra@rpi.edu>
---
 .github/workflows/cmake.yml | 7 ++-----
 1 file changed, 2 insertions(+), 5 deletions(-)

diff --git a/.github/workflows/cmake.yml b/.github/workflows/cmake.yml
index a36afdf97..ce73491d4 100644
--- a/.github/workflows/cmake.yml
+++ b/.github/workflows/cmake.yml
@@ -43,7 +43,7 @@ jobs:
         sudo apt install ccache
         ccache -p # Print ccache config
         ccache -z # Zero ccache statistics
-        echo ::set-output name=key::$(date -u '+%Y-%m-%dT%T')
+        echo timestamp=$(date -u '+%Y-%m-%dT%T') >> "$GITHUB_OUTPUT"
 
     - name: ccache
       uses: actions/cache@v4
@@ -75,10 +75,7 @@ jobs:
       env:
         MPICH_CXX: ${{matrix.compiler.CXX}}
         MPICH_CC: ${{matrix.compiler.CC}}
-      run: |
-        cmake
-          --build ${{github.workspace}}/build
-          --target install
+      run: cmake --build ${{github.workspace}}/build --target install
 
     - name: Test
       env:

From d476ff63057299847d1241475c1eb1aff40049b7 Mon Sep 17 00:00:00 2001
From: Aiden Woodruff <woodra@rpi.edu>
Date: Mon, 23 Jun 2025 13:46:26 -0400
Subject: [PATCH 03/24] fix ccache statistics command typo

Signed-off-by: Aiden Woodruff <woodra@rpi.edu>
---
 .github/workflows/cmake.yml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.github/workflows/cmake.yml b/.github/workflows/cmake.yml
index ce73491d4..ae1b6f85a 100644
--- a/.github/workflows/cmake.yml
+++ b/.github/workflows/cmake.yml
@@ -125,4 +125,4 @@ jobs:
         --output-on-failure
 
     - name: CCache statistics
-      run: cmake -sv
+      run: ccache -sv

From 6ca097db0ce556a0d9ecb9914d69dd3aae3da4a1 Mon Sep 17 00:00:00 2001
From: Aiden Woodruff <woodra@rpi.edu>
Date: Mon, 23 Jun 2025 14:07:30 -0400
Subject: [PATCH 04/24] fix ccache config flags and try to fix strings

- ccache_dir should be the actual location of the cache, while basedir
  should be the root path for all files.
- Not sure if the github actions yaml parser is non-standard, but extra
  indentation seemed to be screwing up the multiline strings. try to fix
  and join some related lines

Signed-off-by: Aiden Woodruff <woodra@rpi.edu>
---
 .github/workflows/cmake.yml | 29 +++++++++++------------------
 1 file changed, 11 insertions(+), 18 deletions(-)

diff --git a/.github/workflows/cmake.yml b/.github/workflows/cmake.yml
index ae1b6f85a..2ffa2fd88 100644
--- a/.github/workflows/cmake.yml
+++ b/.github/workflows/cmake.yml
@@ -19,8 +19,8 @@ jobs:
         cxx_standard: [11, 20]
         metis: [OFF, ON]
     env:
-      CCACHE_DIR: ${{github.workspace}}
-      CCACHE_BASEDIR: ${{github.workspace}}/.ccache
+      CCACHE_DIR: ${{github.workspace}}/.ccache
+      CCACHE_BASEDIR: ${{github.workspace}}
       CCACHE_COMPRESS: true
       CCACHE_MAXSIZE: 200M
 
@@ -92,14 +92,10 @@ jobs:
         MPICH_CC: ${{matrix.compiler.CC}}
       run: >
         cmake
-          -S ${{github.workspace}}/doc
-          -B ${{github.workspace}}/buildExample
-          -DCMAKE_C_COMPILER_LAUNCHER=ccache
-          -DCMAKE_CXX_COMPILER_LAUNCHER=ccache
-          -DCMAKE_C_COMPILER=mpicc
-          -DCMAKE_CXX_COMPILER=mpicxx
-          -DSCOREC_PREFIX=${{github.workspace}}/build/install
-        ;
+        -S ${{github.workspace}}/doc -B ${{github.workspace}}/buildExample
+        -DCMAKE_C_COMPILER_LAUNCHER=ccache -DCMAKE_CXX_COMPILER_LAUNCHER=ccache
+        -DCMAKE_C_COMPILER=mpicc -DCMAKE_CXX_COMPILER=mpicxx
+        -DSCOREC_PREFIX=${{github.workspace}}/build/install ;
         cmake --build ${{github.workspace}}/buildExample
 
     - name: Build MPI-NoMPI Example
@@ -112,14 +108,11 @@ jobs:
         MPICH_CC: ${{matrix.compiler.CC}}
       run: >
         cmake
-          -S ${{github.workspace}}/example/mpi-nompi
-          -B ${{github.workspace}}/example/mpi-nompi/build
-          -DCMAKE_C_COMPILER_LAUNCHER=ccache
-          -DCMAKE_CXX_COMPILER_LAUNCHER=ccache
-          -DCMAKE_C_COMPILER=mpicxx
-          -DCMAKE_CXX_COMPILER=mpicxx
-          -DSCOREC_PREFIX=${{github.workspace}}/build/install
-        ;
+        -S ${{github.workspace}}/example/mpi-nompi
+        -B ${{github.workspace}}/example/mpi-nompi/build
+        -DCMAKE_C_COMPILER_LAUNCHER=ccache -DCMAKE_CXX_COMPILER_LAUNCHER=ccache
+        -DCMAKE_C_COMPILER=mpicxx -DCMAKE_CXX_COMPILER=mpicxx
+        -DSCOREC_PREFIX=${{github.workspace}}/build/install ;
         cmake --build ${{github.workspace}}/example/mpi-nompi/build ;
         ctest --test-dir ${{github.workspace}}/example/mpi-nompi/build
         --output-on-failure

From 8d26de6ebe53c0ca95d1708b85b71910c4fb16db Mon Sep 17 00:00:00 2001
From: Aiden Woodruff <woodra@rpi.edu>
Date: Mon, 23 Jun 2025 14:18:43 -0400
Subject: [PATCH 05/24] commit to test cache restore

- use apt-get (which has a more stable CLI interface) instead of apt.

Signed-off-by: Aiden Woodruff <woodra@rpi.edu>
---
 .github/workflows/cmake.yml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.github/workflows/cmake.yml b/.github/workflows/cmake.yml
index 2ffa2fd88..4f2d222f2 100644
--- a/.github/workflows/cmake.yml
+++ b/.github/workflows/cmake.yml
@@ -40,7 +40,7 @@ jobs:
     - name: setup ccache
       id: setup-ccache
       run: |
-        sudo apt install ccache
+        sudo apt-get install ccache
         ccache -p # Print ccache config
         ccache -z # Zero ccache statistics
         echo timestamp=$(date -u '+%Y-%m-%dT%T') >> "$GITHUB_OUTPUT"

From 1e36ab9899fd72cb7f98dcf048fca3bd6b5e5b5b Mon Sep 17 00:00:00 2001
From: Aiden Woodruff <woodra@rpi.edu>
Date: Mon, 23 Jun 2025 14:34:21 -0400
Subject: [PATCH 06/24] refine ccache key

- add c++ version and build type to cache key parameters.
    - higher cache hits decreases build time significantly, so always
      try to get the most relevant one.
- reduce cache maxsize since the number of caches will increase

Signed-off-by: Aiden Woodruff <woodra@rpi.edu>
---
 .github/workflows/cmake.yml | 12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)

diff --git a/.github/workflows/cmake.yml b/.github/workflows/cmake.yml
index 4f2d222f2..11a34ba2e 100644
--- a/.github/workflows/cmake.yml
+++ b/.github/workflows/cmake.yml
@@ -22,7 +22,7 @@ jobs:
       CCACHE_DIR: ${{github.workspace}}/.ccache
       CCACHE_BASEDIR: ${{github.workspace}}
       CCACHE_COMPRESS: true
-      CCACHE_MAXSIZE: 200M
+      CCACHE_MAXSIZE: 100M
 
     steps:
     - uses: actions/checkout@v4
@@ -49,8 +49,14 @@ jobs:
       uses: actions/cache@v4
       with:
         path: ${{github.workspace}}/.ccache
-        key: ${{matrix.compiler.name}}-ccache-${{steps.setup-ccache.outputs.timestamp}}
-        restore-keys: ${{matrix.compiler.name}}-ccache-
+        key: "${{matrix.compiler.name}}-\
+          ${{matrix.cxx_standard}}-\
+          ${{matrix.build_type}}-\
+          ccache-${{steps.setup-ccache.outputs.timestamp}}"
+        restore-keys: "${{matrix.compiler.name}}-\
+          ${{matrix.cxx_standard}}-\
+          ${{matrix.build_type}}-\
+          ccache-"
 
     - name: Configure CMake
       env:

From 5f217380d7055bcf3fffa288e8c5b28f6e7f7a82 Mon Sep 17 00:00:00 2001
From: Aiden Woodruff <woodra@rpi.edu>
Date: Mon, 23 Jun 2025 14:51:38 -0400
Subject: [PATCH 07/24] empty commit to test cache hits

Signed-off-by: Aiden Woodruff <woodra@rpi.edu>

From 3e5cc593e735da7449cc31d6679e657e237ea8f4 Mon Sep 17 00:00:00 2001
From: Aiden Woodruff <woodra@rpi.edu>
Date: Mon, 23 Jun 2025 15:03:17 -0400
Subject: [PATCH 08/24] add nompi to ccache key

- whether or not nompi is enabled significantly affects compilation,
  since it's exposed in SCOREC_config.h as well as changing what happens
  in pcu/pcu_defines.h
- add cxx: prefix to the cxx_standard to make the key more readable.
- add new key as a second option to ensure that old caches can be used.
    - next commit will remove old form.

Signed-off-by: Aiden Woodruff <woodra@rpi.edu>
---
 .github/workflows/cmake.yml | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/cmake.yml b/.github/workflows/cmake.yml
index 11a34ba2e..51331de34 100644
--- a/.github/workflows/cmake.yml
+++ b/.github/workflows/cmake.yml
@@ -50,12 +50,18 @@ jobs:
       with:
         path: ${{github.workspace}}/.ccache
         key: "${{matrix.compiler.name}}-\
-          ${{matrix.cxx_standard}}-\
+          cxx:${{matrix.cxx_standard}}-\
           ${{matrix.build_type}}-\
+          nompi:${{matrix.no_mpi}}-\
           ccache-${{steps.setup-ccache.outputs.timestamp}}"
         restore-keys: "${{matrix.compiler.name}}-\
           ${{matrix.cxx_standard}}-\
           ${{matrix.build_type}}-\
+          ccache-\n\
+          cxx:${{matrix.compiler.name}}-\
+          ${{matrix.cxx_standard}}-\
+          ${{matrix.build_type}}-\
+          nompi:${{matrix.no_mpi}}-\
           ccache-"
 
     - name: Configure CMake

From 1c1b23c4953fb661f0db71ed35a24ca1467caccf Mon Sep 17 00:00:00 2001
From: Aiden Woodruff <woodra@rpi.edu>
Date: Mon, 23 Jun 2025 15:16:16 -0400
Subject: [PATCH 09/24] remove old cache key and parallel ctest

- remove old cache key and only use new one.
- make ctest run in parallel. the nprocs script should be available as
  it is included with coreutils.

Signed-off-by: Aiden Woodruff <woodra@rpi.edu>
---
 .github/workflows/cmake.yml | 8 ++------
 1 file changed, 2 insertions(+), 6 deletions(-)

diff --git a/.github/workflows/cmake.yml b/.github/workflows/cmake.yml
index 51331de34..a830a2c3e 100644
--- a/.github/workflows/cmake.yml
+++ b/.github/workflows/cmake.yml
@@ -55,11 +55,7 @@ jobs:
           nompi:${{matrix.no_mpi}}-\
           ccache-${{steps.setup-ccache.outputs.timestamp}}"
         restore-keys: "${{matrix.compiler.name}}-\
-          ${{matrix.cxx_standard}}-\
-          ${{matrix.build_type}}-\
-          ccache-\n\
-          cxx:${{matrix.compiler.name}}-\
-          ${{matrix.cxx_standard}}-\
+          cxx:${{matrix.cxx_standard}}-\
           ${{matrix.build_type}}-\
           nompi:${{matrix.no_mpi}}-\
           ccache-"
@@ -94,7 +90,7 @@ jobs:
         MPICH_CXX: ${{matrix.compiler.CXX}}
         MPICH_CC: ${{matrix.compiler.CC}}
       working-directory: ${{github.workspace}}/build
-      run: ctest --output-on-failure -C ${{matrix.build_type}}
+      run: ctest --output-on-failure -j $(nprocs)
 
     - name: Build User Project
       # only need to test with a single build config if the installed cmake config files work

From 65052ba84b98767a676e3c9fc6fe919add7d9cf1 Mon Sep 17 00:00:00 2001
From: Aiden Woodruff <woodra@rpi.edu>
Date: Mon, 23 Jun 2025 15:25:37 -0400
Subject: [PATCH 10/24] revert parallel CTest

- not only is nprocs missing, but the DEPENDS property isn't good
  enough.

Signed-off-by: Aiden Woodruff <woodra@rpi.edu>
---
 .github/workflows/cmake.yml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.github/workflows/cmake.yml b/.github/workflows/cmake.yml
index a830a2c3e..a567adc2d 100644
--- a/.github/workflows/cmake.yml
+++ b/.github/workflows/cmake.yml
@@ -90,7 +90,7 @@ jobs:
         MPICH_CXX: ${{matrix.compiler.CXX}}
         MPICH_CC: ${{matrix.compiler.CC}}
       working-directory: ${{github.workspace}}/build
-      run: ctest --output-on-failure -j $(nprocs)
+      run: ctest --output-on-failure
 
     - name: Build User Project
       # only need to test with a single build config if the installed cmake config files work

From 7d973c6ce8a924f0a938d453f19eebce45d9e486 Mon Sep 17 00:00:00 2001
From: Aiden Woodruff <woodra@rpi.edu>
Date: Mon, 23 Jun 2025 15:45:07 -0400
Subject: [PATCH 11/24] add cache cleanup workflow and recompress

- .github/workflows/cmake.yml: recompress cache before sending.
    - this may or may not help since zstd is already used by the cache
      action.
- .github/workflows/cleanup-caches.yml: add from documentation to
  cleanup 100 caches on PR close.

Signed-off-by: Aiden Woodruff <woodra@rpi.edu>
---
 .github/workflows/cleanup-caches.yml | 28 ++++++++++++++++++++++++++++
 .github/workflows/cmake.yml          |  7 +++++--
 2 files changed, 33 insertions(+), 2 deletions(-)
 create mode 100644 .github/workflows/cleanup-caches.yml

diff --git a/.github/workflows/cleanup-caches.yml b/.github/workflows/cleanup-caches.yml
new file mode 100644
index 000000000..dc716023e
--- /dev/null
+++ b/.github/workflows/cleanup-caches.yml
@@ -0,0 +1,28 @@
+name: Cleanup caches on closed PRs
+# From https://docs.github.com/en/actions/writing-workflows/choosing-what-your-workflow-does/caching-dependencies-to-speed-up-workflows#matching-a-cache-key
+on:
+  pull_request:
+    types: [ closed ]
+jobs:
+  cleanup:
+    runs-on: ubuntu-latest
+    permissions:
+      actions: write
+		steps:
+      - name: Cleanup
+        run: |
+          echo "Fetching list of cache keys"
+          cacheKeysForPR=$(gh cache list --ref $BRANCH --limit 100 --json id --jq '.[].id')
+
+          ## Setting this to not fail the workflow while deleting cache keys.
+          set +e
+          echo "Deleting caches..."
+          for cacheKey in $cacheKeysForPR
+          do
+              gh cache delete $cacheKey
+          done
+          echo "Done"
+        env:
+          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          GH_REPO: ${{ github.repository }}
+          BRANCH: refs/pull/${{ github.event.pull_request.number }}/merge
diff --git a/.github/workflows/cmake.yml b/.github/workflows/cmake.yml
index a567adc2d..88b07c27c 100644
--- a/.github/workflows/cmake.yml
+++ b/.github/workflows/cmake.yml
@@ -125,5 +125,8 @@ jobs:
         ctest --test-dir ${{github.workspace}}/example/mpi-nompi/build
         --output-on-failure
 
-    - name: CCache statistics
-      run: ccache -sv
+    - name: CCache statistics and recompression
+      run: |
+        ccache -sv
+        CCACHE_COMPRESSLEVEL=5 ccache -X
+

From 870e92ae39a315e045e302096243f37421e276f8 Mon Sep 17 00:00:00 2001
From: Aiden Woodruff <woodra@rpi.edu>
Date: Mon, 23 Jun 2025 16:01:08 -0400
Subject: [PATCH 12/24] add paths: check and fix typos

- .github/workflows/cleanup-caches.yml: replace tabs with spaces.
- .github/workflows/cmake.yml: add paths that will trigger runs.
- fix ccache recompression arguments.

Signed-off-by: Aiden Woodruff <woodra@rpi.edu>
---
 .github/workflows/cleanup-caches.yml |  2 +-
 .github/workflows/cmake.yml          | 13 ++++++++++++-
 2 files changed, 13 insertions(+), 2 deletions(-)

diff --git a/.github/workflows/cleanup-caches.yml b/.github/workflows/cleanup-caches.yml
index dc716023e..2f666007a 100644
--- a/.github/workflows/cleanup-caches.yml
+++ b/.github/workflows/cleanup-caches.yml
@@ -8,7 +8,7 @@ jobs:
     runs-on: ubuntu-latest
     permissions:
       actions: write
-		steps:
+    steps:
       - name: Cleanup
         run: |
           echo "Fetching list of cache keys"
diff --git a/.github/workflows/cmake.yml b/.github/workflows/cmake.yml
index 88b07c27c..798d33956 100644
--- a/.github/workflows/cmake.yml
+++ b/.github/workflows/cmake.yml
@@ -4,6 +4,17 @@ on:
     branches: [ develop ]
   pull_request:
     branches: [ develop ]
+    paths:
+      - .github/workflows/cmake.yml
+      - .gitmodules
+      - '**/CMakeLists.txt'
+      - '**/*.cmake'
+      - '**/*.in'
+      - '**/*.h'
+      - '**/*.c'
+      - '**/*.cc'
+      - '**/*.cpp'
+      - '**/*.f'
 jobs:
   build:
     # See: https://docs.github.com/en/free-pro-team@latest/actions/learn-github-actions/managing-complex-workflows#using-a-build-matrix
@@ -128,5 +139,5 @@ jobs:
     - name: CCache statistics and recompression
       run: |
         ccache -sv
-        CCACHE_COMPRESSLEVEL=5 ccache -X
+        ccache -X 5
 

From 133892035fca02806e7581d72900fa96d8eb6611 Mon Sep 17 00:00:00 2001
From: Aiden Woodruff <woodra@rpi.edu>
Date: Mon, 23 Jun 2025 17:21:35 -0400
Subject: [PATCH 13/24] download latest ccache version

- could not find local differences to explain cache misses, but the
  version on ubuntu 22.04 is 4.5.1 and the latest is 4.11. 3 years might
  make a difference.

Signed-off-by: Aiden Woodruff <woodra@rpi.edu>
---
 .github/workflows/cmake.yml | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/cmake.yml b/.github/workflows/cmake.yml
index 798d33956..151c65ec9 100644
--- a/.github/workflows/cmake.yml
+++ b/.github/workflows/cmake.yml
@@ -50,8 +50,14 @@ jobs:
 
     - name: setup ccache
       id: setup-ccache
+      with:
+        ccache_version: 4.11.3
+      # Download latest version as of 2025-06-23
       run: |
-        sudo apt-get install ccache
+        wget https://github.com/ccache/ccache/releases/download/v${{ccache_version}}/ccache-${{ccache_version}}-linux-x86_64.tar.xz
+        tar xf ccache-${{ccache_version}}-linux-x86_64.tar.xz
+        cd ccache-${{ccache_version}}-linux-x86_64
+        sudo make install
         ccache -p # Print ccache config
         ccache -z # Zero ccache statistics
         echo timestamp=$(date -u '+%Y-%m-%dT%T') >> "$GITHUB_OUTPUT"

From 52988723fbed5fd9fcb317cd823c6664b2194867 Mon Sep 17 00:00:00 2001
From: Aiden Woodruff <woodra@rpi.edu>
Date: Mon, 23 Jun 2025 17:26:23 -0400
Subject: [PATCH 14/24] replace `with` with `env`

- with is only for reusable workflows.

Signed-off-by: Aiden Woodruff <woodra@rpi.edu>
---
 .github/workflows/cmake.yml | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/.github/workflows/cmake.yml b/.github/workflows/cmake.yml
index 151c65ec9..3933ba577 100644
--- a/.github/workflows/cmake.yml
+++ b/.github/workflows/cmake.yml
@@ -50,13 +50,13 @@ jobs:
 
     - name: setup ccache
       id: setup-ccache
-      with:
-        ccache_version: 4.11.3
+      env:
+        CCACHE_VERSION: 4.11.3
       # Download latest version as of 2025-06-23
       run: |
-        wget https://github.com/ccache/ccache/releases/download/v${{ccache_version}}/ccache-${{ccache_version}}-linux-x86_64.tar.xz
-        tar xf ccache-${{ccache_version}}-linux-x86_64.tar.xz
-        cd ccache-${{ccache_version}}-linux-x86_64
+        wget https://github.com/ccache/ccache/releases/download/v${CCACHE_VERSION}/ccache-${CCACHE_VERSION}-linux-x86_64.tar.xz
+        tar xf ccache-${CCACHE_VERSION}-linux-x86_64.tar.xz
+        cd ccache-${CCACHE_VERSION}-linux-x86_64
         sudo make install
         ccache -p # Print ccache config
         ccache -z # Zero ccache statistics

From 0e0c707e1dd4a1f14850c0adfdb5328cd825b4b2 Mon Sep 17 00:00:00 2001
From: Aiden Woodruff <woodra@rpi.edu>
Date: Mon, 23 Jun 2025 17:28:35 -0400
Subject: [PATCH 15/24] move clear cache statistics after cache restore

- ccache 4.7 changed the cache format so the old caches are
  incompatible.
- also, clear the statistics after loading. I think that maybe was
  causing incorrect statistics.

Signed-off-by: Aiden Woodruff <woodra@rpi.edu>
---
 .github/workflows/cmake.yml | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/cmake.yml b/.github/workflows/cmake.yml
index 3933ba577..0c27a7bfe 100644
--- a/.github/workflows/cmake.yml
+++ b/.github/workflows/cmake.yml
@@ -59,7 +59,6 @@ jobs:
         cd ccache-${CCACHE_VERSION}-linux-x86_64
         sudo make install
         ccache -p # Print ccache config
-        ccache -z # Zero ccache statistics
         echo timestamp=$(date -u '+%Y-%m-%dT%T') >> "$GITHUB_OUTPUT"
 
     - name: ccache
@@ -77,6 +76,9 @@ jobs:
           nompi:${{matrix.no_mpi}}-\
           ccache-"
 
+    - name: Clear ccache statistics
+      run: ccache -z
+
     - name: Configure CMake
       env:
         MPICH_CXX: ${{matrix.compiler.CXX}}

From 8a3eab998b84ccb25f6783b9f9a0476d2eb6261a Mon Sep 17 00:00:00 2001
From: Aiden Woodruff <woodra@rpi.edu>
Date: Mon, 23 Jun 2025 17:36:05 -0400
Subject: [PATCH 16/24] revert to default ccache version

Signed-off-by: Aiden Woodruff <woodra@rpi.edu>
---
 .github/workflows/cmake.yml | 8 +-------
 1 file changed, 1 insertion(+), 7 deletions(-)

diff --git a/.github/workflows/cmake.yml b/.github/workflows/cmake.yml
index 0c27a7bfe..afb2afa9c 100644
--- a/.github/workflows/cmake.yml
+++ b/.github/workflows/cmake.yml
@@ -50,14 +50,8 @@ jobs:
 
     - name: setup ccache
       id: setup-ccache
-      env:
-        CCACHE_VERSION: 4.11.3
-      # Download latest version as of 2025-06-23
       run: |
-        wget https://github.com/ccache/ccache/releases/download/v${CCACHE_VERSION}/ccache-${CCACHE_VERSION}-linux-x86_64.tar.xz
-        tar xf ccache-${CCACHE_VERSION}-linux-x86_64.tar.xz
-        cd ccache-${CCACHE_VERSION}-linux-x86_64
-        sudo make install
+        sudo apt-get install ccache
         ccache -p # Print ccache config
         echo timestamp=$(date -u '+%Y-%m-%dT%T') >> "$GITHUB_OUTPUT"
 

From 8013a7e3e3d5b470a5fbfa9263e9ce51572c57e3 Mon Sep 17 00:00:00 2001
From: Aiden Woodruff <woodra@rpi.edu>
Date: Mon, 23 Jun 2025 17:48:02 -0400
Subject: [PATCH 17/24] add ninja and ccache to python-api-test

- .github/workflows/python-api-test.yml: add ccache settings.
- add ccache to the Zoltan and PUMI builds (typically the longest
  steps).
- might need to use ccache-swig instead which is built by the swig
  library.

Signed-off-by: Aiden Woodruff <woodra@rpi.edu>
---
 .github/workflows/python-api-test.yml | 36 ++++++++++++++++++++++++---
 1 file changed, 32 insertions(+), 4 deletions(-)

diff --git a/.github/workflows/python-api-test.yml b/.github/workflows/python-api-test.yml
index 2d2d645b0..6eb1c0892 100644
--- a/.github/workflows/python-api-test.yml
+++ b/.github/workflows/python-api-test.yml
@@ -13,6 +13,10 @@ jobs:
     env:
       PYTHONPATH: ${{ github.workspace }}/build/python_wrappers
       LD_LIBRARY_PATH: ${{ github.workspace }}/libs/install/lib:${LD_LIBRARY_PATH}
+      CCACHE_DIR: ${{github.workspace}}/.ccache
+      CCACHE_BASEDIR: ${{github.workspace}}
+      CCACHE_COMPRESS: true
+      CCACHE_MAXSIZE: 100M
 
     steps:
       - name: Checkout repository
@@ -21,9 +25,23 @@ jobs:
       - name: Install dependencies
         run: |
           sudo apt-get update
-          sudo apt-get install -y cmake mpich build-essential libbz2-dev
+          sudo apt-get install -y cmake mpich build-essential libbz2-dev ccache
           pip3 install mpi4py
-      
+
+      - name: setup ccache
+        id: setup-ccache
+        run: |
+          ccache -p # Print ccache config
+          echo timestamp=$(date -u '+%Y-%m-%dT%T') >> "$GITHUB_OUTPUT"
+      - name: ccache
+        uses: actions/cache@v4
+        with:
+          path: ${{github.workspace}}/.ccache
+          key: "pyapi-ccache-${{steps.setup-ccache.outputs.timestamp}}"
+          restore-keys: "pyapi-ccache-"
+      - name: Clear ccache statistics
+        run: ccache -z
+
       - name: Build SWIG
         run: |
           git clone https://github.com/swig/swig.git
@@ -62,6 +80,8 @@ jobs:
           cmake ../Trilinos \
             -DCMAKE_INSTALL_PREFIX=${{ github.workspace }}/libs/install \
             -DTPL_ENABLE_MPI:BOOL=ON \
+            -DCMAKE_C_COMPILER_LAUNCHER=ccache \
+            -DCMAKE_CXX_COMPILER_LAUNCHER=ccache \
             -DCMAKE_C_FLAGS="-O3 -fPIC" \
             -DCMAKE_CXX_FLAGS="-O3 -fPIC" \
             -DTrilinos_ENABLE_ALL_PACKAGES:BOOL=OFF \
@@ -77,7 +97,10 @@ jobs:
       - name: Configure PUMI
         run: |
           cmake -S . -B build \
+            -GNinja \
             -DCMAKE_INSTALL_PREFIX=${{ github.workspace }}/build/install \
+            -DCMAKE_C_COMPILER_LAUNCHER=ccache \
+            -DCMAKE_CXX_COMPILER_LAUNCHER=ccache \
             -DCMAKE_C_COMPILER=mpicc \
             -DCMAKE_CXX_COMPILER=mpicxx \
             -DSCOREC_CXX_OPTIMIZE=ON \
@@ -93,11 +116,16 @@ jobs:
             -DPARMETIS_PREFIX=${{ github.workspace }}/libs/install \
             -DENABLE_SIMMETRIX=OFF
 
-      - name: Build and install
+      - name: Build and install PUMI
         run: |
-          cmake --build build -j 4 --target install
+          cmake --build build --target install
 
       - name: Run Python test
         working-directory: ${{github.workspace}}/python_wrappers
         run: |
           python3 test_pyCore.py -g input/cube.dmg -m input/cube.smb
+
+      - name: Ccache statistics and recompression
+        run: |
+          ccache -sv
+          ccache -X 5

From 194c7e893cdca34ba8e108e3717b0bcb0b71c7a6 Mon Sep 17 00:00:00 2001
From: Aiden Woodruff <woodra@rpi.edu>
Date: Mon, 23 Jun 2025 18:07:11 -0400
Subject: [PATCH 18/24] use ninja for python api trilinos build

- also do shallow clone

Signed-off-by: Aiden Woodruff <woodra@rpi.edu>
---
 .github/workflows/python-api-test.yml | 10 ++++------
 1 file changed, 4 insertions(+), 6 deletions(-)

diff --git a/.github/workflows/python-api-test.yml b/.github/workflows/python-api-test.yml
index 6eb1c0892..0f23c4957 100644
--- a/.github/workflows/python-api-test.yml
+++ b/.github/workflows/python-api-test.yml
@@ -74,10 +74,9 @@ jobs:
 
       - name: Build Zoltan from Trilinos (minimal)
         run: |
-          git clone https://github.com/trilinos/Trilinos.git
-          mkdir build-zoltan
-          cd build-zoltan
-          cmake ../Trilinos \
+          git clone --depth 1 https://github.com/trilinos/Trilinos.git
+          cmake -S Trilinos -b build-zoltan \
+            -GNinja \
             -DCMAKE_INSTALL_PREFIX=${{ github.workspace }}/libs/install \
             -DTPL_ENABLE_MPI:BOOL=ON \
             -DCMAKE_C_COMPILER_LAUNCHER=ccache \
@@ -91,8 +90,7 @@ jobs:
             -DZoltan_ENABLE_ParMETIS:BOOL=ON \
             -DParMETIS_INCLUDE_DIRS=${{ github.workspace }}/libs/install \
             -DParMETIS_LIBRARY_DIRS=${{ github.workspace }}/libs/install
-          make
-          make install
+          cmake --build build-zoltan -t install
 
       - name: Configure PUMI
         run: |

From fff578a2a2ba3eb50442425f1b06a86ebfbb752a Mon Sep 17 00:00:00 2001
From: Aiden Woodruff <woodra@rpi.edu>
Date: Mon, 23 Jun 2025 18:17:16 -0400
Subject: [PATCH 19/24] fix pyapi workflow typo

- remove build-essential from list. probably not causing any of the
  long install time problems (mpich and dependencies are at fault) but
  it should not be necessary as a meta-package since all it's
  depdendencies are installed by default.
- remove cmake from the install list as it's also available by default.
- fix cmake configure typo.

Signed-off-by: Aiden Woodruff <woodra@rpi.edu>
---
 .github/workflows/python-api-test.yml | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/.github/workflows/python-api-test.yml b/.github/workflows/python-api-test.yml
index 0f23c4957..6f4cf84f4 100644
--- a/.github/workflows/python-api-test.yml
+++ b/.github/workflows/python-api-test.yml
@@ -25,7 +25,7 @@ jobs:
       - name: Install dependencies
         run: |
           sudo apt-get update
-          sudo apt-get install -y cmake mpich build-essential libbz2-dev ccache
+          sudo apt-get install -y mpich libbz2-dev ccache
           pip3 install mpi4py
 
       - name: setup ccache
@@ -75,7 +75,7 @@ jobs:
       - name: Build Zoltan from Trilinos (minimal)
         run: |
           git clone --depth 1 https://github.com/trilinos/Trilinos.git
-          cmake -S Trilinos -b build-zoltan \
+          cmake -S Trilinos -B build-zoltan \
             -GNinja \
             -DCMAKE_INSTALL_PREFIX=${{ github.workspace }}/libs/install \
             -DTPL_ENABLE_MPI:BOOL=ON \

From 998d15cef9bee620ba9be2fa6dd7077ed8adca97 Mon Sep 17 00:00:00 2001
From: Aiden Woodruff <woodra@rpi.edu>
Date: Mon, 23 Jun 2025 18:24:32 -0400
Subject: [PATCH 20/24] add pip cache

- the install dependencies step took a long time because of pip!
- add cache for pip.
- add step to get single timestamp for both caches.

Signed-off-by: Aiden Woodruff <woodra@rpi.edu>
---
 .github/workflows/python-api-test.yml | 23 ++++++++++++++++-------
 1 file changed, 16 insertions(+), 7 deletions(-)

diff --git a/.github/workflows/python-api-test.yml b/.github/workflows/python-api-test.yml
index 6f4cf84f4..842a753df 100644
--- a/.github/workflows/python-api-test.yml
+++ b/.github/workflows/python-api-test.yml
@@ -22,25 +22,34 @@ jobs:
       - name: Checkout repository
         uses: actions/checkout@v3
 
+      - name: setup cache timestamp
+        id: setup-cache
+        run: |
+          echo timestamp=$(date -u '+%Y-%m-%dT%T') >> "$GITHUB_OUTPUT"
+
+      - name: Cache pip
+        uses: actions/cache@v4
+        with:
+          path: ~/.cache/pip
+          key: "pyapi-pip-${{steps.setup-cache.outputs.timestamp}}"
+          restore-keys: pyapi-pip-
+
       - name: Install dependencies
         run: |
           sudo apt-get update
           sudo apt-get install -y mpich libbz2-dev ccache
           pip3 install mpi4py
 
-      - name: setup ccache
-        id: setup-ccache
-        run: |
-          ccache -p # Print ccache config
-          echo timestamp=$(date -u '+%Y-%m-%dT%T') >> "$GITHUB_OUTPUT"
       - name: ccache
         uses: actions/cache@v4
         with:
           path: ${{github.workspace}}/.ccache
-          key: "pyapi-ccache-${{steps.setup-ccache.outputs.timestamp}}"
+          key: "pyapi-ccache-${{steps.setup-cache.outputs.timestamp}}"
           restore-keys: "pyapi-ccache-"
       - name: Clear ccache statistics
-        run: ccache -z
+        run: |
+          ccache -p # Print ccache config
+          ccache -z
 
       - name: Build SWIG
         run: |

From d62e739a8002b4b235e4a8893cba5f5c5d9da3f2 Mon Sep 17 00:00:00 2001
From: Aiden Woodruff <woodra@rpi.edu>
Date: Mon, 23 Jun 2025 18:41:11 -0400
Subject: [PATCH 21/24] add ccache for pyapi swig build

- allow ccache to masquerade as the compiler for swig build.
- same method used by the action hendrikmuhs/ccache-action in
  https://github.com/swig/swig/blob/1f8684eb540d5d7c63fe7d5c3853990dd2316999/.github/workflows/linux.yml

Signed-off-by: Aiden Woodruff <woodra@rpi.edu>
---
 .github/workflows/python-api-test.yml | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/.github/workflows/python-api-test.yml b/.github/workflows/python-api-test.yml
index 842a753df..c8b0c8481 100644
--- a/.github/workflows/python-api-test.yml
+++ b/.github/workflows/python-api-test.yml
@@ -38,6 +38,11 @@ jobs:
         run: |
           sudo apt-get update
           sudo apt-get install -y mpich libbz2-dev ccache
+          sudo mkdir -p /usr/local/opt/ccache/libexec
+          sudo ln -s $(which ccache) /usr/local/opt/ccache/libexec/gcc
+          sudo ln -s $(which ccache) /usr/local/opt/ccache/libexec/g++
+          sudo ln -s $(which ccache) /usr/local/opt/ccache/libexec/cc
+          sudo ln -s $(which ccache) /usr/local/opt/ccache/libexec/c++
           pip3 install mpi4py
 
       - name: ccache
@@ -46,6 +51,7 @@ jobs:
           path: ${{github.workspace}}/.ccache
           key: "pyapi-ccache-${{steps.setup-cache.outputs.timestamp}}"
           restore-keys: "pyapi-ccache-"
+
       - name: Clear ccache statistics
         run: |
           ccache -p # Print ccache config
@@ -55,6 +61,7 @@ jobs:
         run: |
           git clone https://github.com/swig/swig.git
           cd swig
+          export PATH=/usr/local/opt/ccache/libexec:$PATH
           ./autogen.sh
           ./configure --prefix=${{ github.workspace }}/libs/install
           make

From def4bcc782c3da42c6eab65639631439d298e577 Mon Sep 17 00:00:00 2001
From: Aiden Woodruff <woodra@rpi.edu>
Date: Mon, 23 Jun 2025 18:49:37 -0400
Subject: [PATCH 22/24] use ccache for gklib/metis/parmetis in pyapi ci

- use the top level env instead of adding to each config.
- gklib/metis/parmetis are secretly cmake but they have a make config.
  using the environmental variable should still reach cmake.

Signed-off-by: Aiden Woodruff <woodra@rpi.edu>
---
 .github/workflows/python-api-test.yml | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/.github/workflows/python-api-test.yml b/.github/workflows/python-api-test.yml
index c8b0c8481..832d51305 100644
--- a/.github/workflows/python-api-test.yml
+++ b/.github/workflows/python-api-test.yml
@@ -17,6 +17,8 @@ jobs:
       CCACHE_BASEDIR: ${{github.workspace}}
       CCACHE_COMPRESS: true
       CCACHE_MAXSIZE: 100M
+      CMAKE_C_COMPILER_LAUNCHER: ccache
+      CMAKE_CXX_COMPILER_LAUNCHER: ccache
 
     steps:
       - name: Checkout repository
@@ -95,8 +97,6 @@ jobs:
             -GNinja \
             -DCMAKE_INSTALL_PREFIX=${{ github.workspace }}/libs/install \
             -DTPL_ENABLE_MPI:BOOL=ON \
-            -DCMAKE_C_COMPILER_LAUNCHER=ccache \
-            -DCMAKE_CXX_COMPILER_LAUNCHER=ccache \
             -DCMAKE_C_FLAGS="-O3 -fPIC" \
             -DCMAKE_CXX_FLAGS="-O3 -fPIC" \
             -DTrilinos_ENABLE_ALL_PACKAGES:BOOL=OFF \
@@ -113,8 +113,6 @@ jobs:
           cmake -S . -B build \
             -GNinja \
             -DCMAKE_INSTALL_PREFIX=${{ github.workspace }}/build/install \
-            -DCMAKE_C_COMPILER_LAUNCHER=ccache \
-            -DCMAKE_CXX_COMPILER_LAUNCHER=ccache \
             -DCMAKE_C_COMPILER=mpicc \
             -DCMAKE_CXX_COMPILER=mpicxx \
             -DSCOREC_CXX_OPTIMIZE=ON \

From 41c88bced28fc3806ed06ef7137c04bf8e575bc4 Mon Sep 17 00:00:00 2001
From: Aiden Woodruff <woodra@rpi.edu>
Date: Tue, 24 Jun 2025 09:57:13 -0400
Subject: [PATCH 23/24] ci: prune matrix and use cmake env ccache

- .github/workflows/cmake.yml: exclude release llvm and c++20. we really
  only care about the extra warnings from llvm and release should have
  less code.
- set CMAKE_C_COMPILER_LAUNCHER=ccache in top-level workflow env instead
  of on each config.

Signed-off-by: Aiden Woodruff <woodra@rpi.edu>
---
 .github/workflows/cmake.yml | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/.github/workflows/cmake.yml b/.github/workflows/cmake.yml
index afb2afa9c..5129fd87d 100644
--- a/.github/workflows/cmake.yml
+++ b/.github/workflows/cmake.yml
@@ -29,11 +29,18 @@ jobs:
         no_mpi: [OFF, ON]
         cxx_standard: [11, 20]
         metis: [OFF, ON]
+        exclude:
+          - compiler: { name: LLVM }
+            build_type: Release
+          - cxx_standard: 20
+            build_type: Release
     env:
       CCACHE_DIR: ${{github.workspace}}/.ccache
       CCACHE_BASEDIR: ${{github.workspace}}
       CCACHE_COMPRESS: true
       CCACHE_MAXSIZE: 100M
+      CMAKE_C_COMPILER_LAUNCHER: ccache
+      CMAKE_CXX_COMPILER_LAUNCHER: ccache
 
     steps:
     - uses: actions/checkout@v4
@@ -82,8 +89,6 @@ jobs:
         -DCMAKE_INSTALL_PREFIX=${{github.workspace}}/build/install
         -GNinja -DCMAKE_VERBOSE_MAKEFILE=ON
         -DCMAKE_BUILD_TYPE=${{matrix.build_type}}
-        -DCMAKE_C_COMPILER_LAUNCHER=ccache
-        -DCMAKE_CXX_COMPILER_LAUNCHER=ccache
         -DCMAKE_CXX_COMPILER=mpicxx -DCMAKE_C_COMPILER=mpicc
         -DCMAKE_CXX_STANDARD=${{matrix.cxx_standard}}
         -DSCOREC_CXX_WARNINGS=ON
@@ -114,7 +119,6 @@ jobs:
       run: >
         cmake
         -S ${{github.workspace}}/doc -B ${{github.workspace}}/buildExample
-        -DCMAKE_C_COMPILER_LAUNCHER=ccache -DCMAKE_CXX_COMPILER_LAUNCHER=ccache
         -DCMAKE_C_COMPILER=mpicc -DCMAKE_CXX_COMPILER=mpicxx
         -DSCOREC_PREFIX=${{github.workspace}}/build/install ;
         cmake --build ${{github.workspace}}/buildExample
@@ -131,7 +135,6 @@ jobs:
         cmake
         -S ${{github.workspace}}/example/mpi-nompi
         -B ${{github.workspace}}/example/mpi-nompi/build
-        -DCMAKE_C_COMPILER_LAUNCHER=ccache -DCMAKE_CXX_COMPILER_LAUNCHER=ccache
         -DCMAKE_C_COMPILER=mpicxx -DCMAKE_CXX_COMPILER=mpicxx
         -DSCOREC_PREFIX=${{github.workspace}}/build/install ;
         cmake --build ${{github.workspace}}/example/mpi-nompi/build ;

From 03ef7cfe787c00eb99093c8ce1214ddb61d2df9f Mon Sep 17 00:00:00 2001
From: Aiden Woodruff <woodra@rpi.edu>
Date: Tue, 24 Jun 2025 12:04:26 -0400
Subject: [PATCH 24/24] ci: install ccache gcc masq in /opt/ccache

- .github/workflows/python-api-test.yml: avoid sudo when installing
  ccache compiler masquerades by installing into /opt instead of
  /usr/local/opt.

Signed-off-by: Aiden Woodruff <woodra@rpi.edu>
---
 .github/workflows/python-api-test.yml | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/.github/workflows/python-api-test.yml b/.github/workflows/python-api-test.yml
index 832d51305..423f3f458 100644
--- a/.github/workflows/python-api-test.yml
+++ b/.github/workflows/python-api-test.yml
@@ -40,11 +40,11 @@ jobs:
         run: |
           sudo apt-get update
           sudo apt-get install -y mpich libbz2-dev ccache
-          sudo mkdir -p /usr/local/opt/ccache/libexec
-          sudo ln -s $(which ccache) /usr/local/opt/ccache/libexec/gcc
-          sudo ln -s $(which ccache) /usr/local/opt/ccache/libexec/g++
-          sudo ln -s $(which ccache) /usr/local/opt/ccache/libexec/cc
-          sudo ln -s $(which ccache) /usr/local/opt/ccache/libexec/c++
+          mkdir -p /opt/ccache/libexec
+          ln -s $(which ccache) /opt/ccache/libexec/gcc
+          ln -s $(which ccache) /opt/ccache/libexec/g++
+          ln -s $(which ccache) /opt/ccache/libexec/cc
+          ln -s $(which ccache) /opt/ccache/libexec/c++
           pip3 install mpi4py
 
       - name: ccache
@@ -63,7 +63,7 @@ jobs:
         run: |
           git clone https://github.com/swig/swig.git
           cd swig
-          export PATH=/usr/local/opt/ccache/libexec:$PATH
+          export PATH=/opt/ccache/libexec:$PATH
           ./autogen.sh
           ./configure --prefix=${{ github.workspace }}/libs/install
           make