From 3bd60acdfb1819e5f3bb85659d73fa5f892034f4 Mon Sep 17 00:00:00 2001
From: zmoon <zmoon92@gmail.com>
Date: Thu, 2 May 2024 12:38:02 -0600
Subject: [PATCH 1/4] MPI not required for NEXUS itself

ESMF has "mpiuni" build option for running without MPI
---
 src/CMakeLists.txt | 1 -
 1 file changed, 1 deletion(-)

diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index d0a8854..3f2580d 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -12,7 +12,6 @@ target_include_directories(NEXUS_Shared
 )
 
 # find external libraries
-find_package(MPI REQUIRED)
 find_package(ESMF REQUIRED)
 find_package(NetCDF REQUIRED COMPONENTS Fortran)
 

From 8e2d20dff7b41aff1bd58e1bf07e1b51e50a29cc Mon Sep 17 00:00:00 2001
From: zmoon <zmoon92@gmail.com>
Date: Wed, 29 May 2024 16:28:59 -0600
Subject: [PATCH 2/4] Build NEXUS in CI

using pre-built ESMF, which would otherwise add ~ 9 min to the
CI run time
---
 .github/workflows/ci.yml | 42 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 42 insertions(+)
 create mode 100644 .github/workflows/ci.yml

diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
new file mode 100644
index 0000000..eeebeaa
--- /dev/null
+++ b/.github/workflows/ci.yml
@@ -0,0 +1,42 @@
+name: CI
+
+on:
+  push:
+    branches: [develop]
+  pull_request:
+  workflow_dispatch:
+
+jobs:
+  build:
+    name: Build (APT, no MPI, pre-built ESMF)
+    runs-on: ubuntu-22.04
+    steps:
+      - name: Check out
+        uses: actions/checkout@v4
+        with:
+          submodules: true
+
+      - name: Install dependencies
+        run: sudo apt-get install -y libnetcdf-dev libnetcdff-dev
+          liblapack-dev libopenblas-dev
+
+      - name: Fetch pre-built ESMF
+        run: |
+          v="8.3.1"  # ESMF
+          gcc="12"
+          esmf_base=$HOME/esmf
+          esmf=${v}-gcc-${gcc}-mpiuni
+
+          export ESMF_DIR=${esmf_base}/${esmf}
+          mkdir -p $ESMF_DIR
+          cd $ESMF_DIR
+          wget https://github.com/zmoon/gha-esmf/releases/download/v0.0.5/${esmf}.tar.gz
+          tar xzvf ${esmf}.tar.gz
+
+          echo "ESMFMKFILE=${ESMF_DIR}/lib/libO/Linux.gfortran.64.mpiuni.default/esmf.mk" >> "$GITHUB_ENV"
+
+      - name: Configure
+        run: FC=gfortran-12 cmake -S . -B build
+
+      - name: Build
+        run: cmake --build build

From 05dfd499aeff5d3e6641ee4d9c89c08390119b9f Mon Sep 17 00:00:00 2001
From: zmoon <zmoon92@gmail.com>
Date: Wed, 29 May 2024 16:37:18 -0600
Subject: [PATCH 3/4] Fetch depth 2

getting

fatal: No tags can describe '4e818813da35bf76dbcee2da6ecc598b9c89b1a7'.

(HEMCO hash)
---
 .github/workflows/ci.yml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index eeebeaa..51f0472 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -15,6 +15,7 @@ jobs:
         uses: actions/checkout@v4
         with:
           submodules: true
+          fetch-depth: 2
 
       - name: Install dependencies
         run: sudo apt-get install -y libnetcdf-dev libnetcdff-dev

From 6ff9422dafb4af7776a71d5955210fe39f9b9bbd Mon Sep 17 00:00:00 2001
From: zmoon <zmoon92@gmail.com>
Date: Wed, 29 May 2024 16:41:07 -0600
Subject: [PATCH 4/4] Just get all history

---
 .github/workflows/ci.yml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 51f0472..f08155a 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -15,7 +15,7 @@ jobs:
         uses: actions/checkout@v4
         with:
           submodules: true
-          fetch-depth: 2
+          fetch-depth: 0
 
       - name: Install dependencies
         run: sudo apt-get install -y libnetcdf-dev libnetcdff-dev