From 7f665ce83f1c194b84b7af843f00750debd924c3 Mon Sep 17 00:00:00 2001
From: Jeff Hammond <jehammond@nvidia.com>
Date: Mon, 21 Sep 2026 10:02:54 +0300
Subject: [PATCH] Port Travis CI matrix to GitHub Actions

Replace the minimal makefile.yml (single Linux/gcc job per target) with
a full matrix mirroring .travis.yml: os x compiler x PRK_TARGET, using
the same ci/install-deps.sh and ci/build-run-prk.sh scripts Travis
called, plus the same os/compiler exclusions for the currently-active
targets (allserial, allc1z, allcxx, allpython, alljulia, allfortran).
Targets Travis had disabled are kept as comments rather than ported to
working jobs. Also fixes the trigger branch (was "default", which does
not exist in this repo; now "main") so the workflow actually runs.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
---
 .github/workflows/ci.yml       | 99 ++++++++++++++++++++++++++++++++++
 .github/workflows/makefile.yml | 31 -----------
 2 files changed, 99 insertions(+), 31 deletions(-)
 create mode 100644 .github/workflows/ci.yml
 delete mode 100644 .github/workflows/makefile.yml

diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
new file mode 100644
index 000000000..f0b9a2b35
--- /dev/null
+++ b/.github/workflows/ci.yml
@@ -0,0 +1,99 @@
+name: CI
+
+# Port of the Travis CI matrix (.travis.yml) to GitHub Actions.
+# Reuses the same ci/install-deps.sh and ci/build-run-prk.sh scripts Travis called,
+# so behavior per PRK_TARGET/os/compiler combination is unchanged.
+
+on:
+  push:
+    branches: [ main ]
+  pull_request:
+    branches: [ main ]
+
+jobs:
+  build:
+    name: ${{ matrix.target }} (${{ matrix.os }}, ${{ matrix.compiler }})
+    runs-on: ${{ matrix.os }}
+
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ubuntu-latest, macos-latest]
+        compiler: [gcc, clang]
+        target:
+          - allserial
+          - allc1z
+          - allcxx
+          - allpython
+          - alljulia
+          - allfortran
+          # Disabled in the original Travis matrix; kept here as a record for future
+          # re-enabling rather than being ported to a working GitHub Actions job.
+          # - allrust
+          # - allopenmp
+          # - allmpi
+          # - allshmem
+          # - allampi
+          # - allfgmpi
+          # - allcharm++
+          # - allgrappa
+          # - allupc UPC_IMPL=gupc
+          # - allupc UPC_IMPL=bupc GASNET_CONDUIT=smp PRK_FLAGS="-Wc,-O3"
+          # - allupc UPC_IMPL=bupc GASNET_CONDUIT=udp PRK_FLAGS="-Wc,-O3"
+          # - allupc UPC_IMPL=bupc GASNET_CONDUIT=mpi PRK_FLAGS="-Wc,-O3"
+          # - allupc UPC_IMPL=bupc GASNET_CONDUIT=ofi PRK_FLAGS="-Wc,-O3"
+          # - alloctave
+          # - allchapel CHPL_COMM=none
+          # - allchapel CHPL_COMM=gasnet
+          # - allhpx3
+          # - allhpx5
+        exclude:
+          # There is nothing inherently wrong with GCC@macOS but macOS runner throughput
+          # is low, so focus on Clang@macOS (mirrors the Travis os/compiler exclusions).
+          - os: macos-latest
+            compiler: gcc
+            target: allserial
+          - os: macos-latest
+            compiler: gcc
+            target: allc1z
+          # LLVM Fortran is not ready.
+          - compiler: clang
+            target: allfortran
+          # Python/Julia do not use a compiler, so only test one toolchain per OS (clang).
+          - compiler: gcc
+            target: allpython
+          - compiler: gcc
+            target: alljulia
+
+    env:
+      CI_ROOT: ${{ github.workspace }}/PRK-deps
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Set up compiler environment
+        run: |
+          mkdir -p "${CI_ROOT}"
+          if [ "${{ matrix.compiler }}" = "gcc" ]; then
+            echo "CC=gcc" >> "$GITHUB_ENV"
+            echo "CXX=g++" >> "$GITHUB_ENV"
+          else
+            echo "CC=clang" >> "$GITHUB_ENV"
+            echo "CXX=clang++" >> "$GITHUB_ENV"
+          fi
+          echo "FC=gfortran" >> "$GITHUB_ENV"
+          echo "${CI_ROOT}/bin" >> "$GITHUB_PATH"
+          echo "${CI_ROOT}/gcc/bin" >> "$GITHUB_PATH"
+          echo "${CI_ROOT}/cmake/bin" >> "$GITHUB_PATH"
+
+      - name: Install dependencies
+        run: sh ./ci/install-deps.sh "${CI_ROOT}" ${{ matrix.target }}
+
+      - name: Build and run
+        run: sh ./ci/build-run-prk.sh "${CI_ROOT}" ${{ matrix.target }}
+
+      - name: Dump config.log on failure
+        if: failure()
+        run: |
+          echo "Sad panda"
+          find . -name config.log -exec grep -L "configure: exit 0" {} \; | xargs -r cat
diff --git a/.github/workflows/makefile.yml b/.github/workflows/makefile.yml
deleted file mode 100644
index 1fc02e80e..000000000
--- a/.github/workflows/makefile.yml
+++ /dev/null
@@ -1,31 +0,0 @@
-name: Makefile CI
-
-on:
-  push:
-    branches: [ default ]
-  pull_request:
-    branches: [ default ]
-
-jobs:
-  build:
-
-    runs-on: ubuntu-latest
-
-    steps:
-    - uses: actions/checkout@v2
-    
-    - name: Test Python
-      run: |
-        python -m pip install --upgrade pip
-        pip install numpy
-        if [ -f requirements.txt ]; then pip install -r requirements.txt; fi
-        bash ./ci/build-run-prk.sh /tmp allpython
-      
-    - name: Test C++
-      run: CXX=g++ bash ./ci/build-run-prk.sh /tmp allcxx
-      
-    - name: Test Fortran
-      run: FC=gfortran bash ./ci/build-run-prk.sh /tmp allfortran
-      
-    - name: Test C11
-      run: CC=gcc bash ./ci/build-run-prk.sh /tmp allc1z