Set up github regression

.github/CODEOWNERS

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+# These owners will be the default owners for everything in
+# the repo. Unless a later match takes precedence,
+# @global-owner1 and @global-owner2 will be requested for
+# review when someone opens a pull request.
+*       @kathlenemagnus

.github/actions/build/entrypoint.sh

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+#!/usr/bin/env bash
+
+set -x
+
+source "/usr/share/miniconda/etc/profile.d/conda.sh"
+conda activate riscv_func_model
+
+echo "Starting Build Entry"
+echo "HOME:" $HOME
+echo "GITHUB_WORKSPACE:" $GITHUB_WORKSPACE
+echo "GITHUB_EVENT_PATH:" $GITHUB_EVENT_PATH
+echo "CONDA_PREFIX:" $CONDA_PREFIX
+echo "PWD:" `pwd`
+
+CXX_COMPILER=${COMPILER/clang/clang++}
+
+#
+# Compile Sparta Infra (always build with release)
+#   Have other build types point to release
+#
+echo "Building Sparta Infra"
+cd ${GITHUB_WORKSPACE}/map/sparta
+mkdir -p release
+cd release
+CC=$COMPILER CXX=$CXX_COMPILER cmake .. -DCMAKE_BUILD_TYPE=Release -DGEN_DEBUG_INFO=OFF -DCMAKE_INSTALL_PREFIX=${CONDA_PREFIX}
+if [ $? -ne 0 ]; then
+    echo "ERROR: CMake for Sparta framework failed"
+    exit 0
+fi
+make -j$(nproc --all) install > install.log
+BUILD_SPARTA=$?
+if [ ${BUILD_SPARTA} -ne 0 ]; then
+    echo "ERROR: build sparta FAILED!!!"
+    echo "$(<install.log)"
+    exit 1
+fi
+rm install.log
+
+cd ${GITHUB_WORKSPACE}
+mkdir $ATLAS_BUILD_TYPE
+cd $ATLAS_BUILD_TYPE
+CC=$COMPILER CXX=$CXX_COMPILER cmake .. -DCMAKE_BUILD_TYPE=$ATLAS_BUILD_TYPE -DGEN_DEBUG_INFO=OFF
+if [ $? -ne 0 ]; then
+    echo "ERROR: CMake for atlas failed"
+    exit 1
+fi
+make -j$(nproc --all) regress > regress.log
+BUILD_ATLAS=$?
+if [ ${BUILD_ATLAS} -ne 0 ]; then
+    echo "ERROR: build/regress of Atlas FAILED!!!"
+    echo "$(<regress.log)"
+    exit 1
+fi
+rm regress.log

.github/workflows/ubuntu-build.yml

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+on:
+  pull_request:
+    branches:
+      - master
+
+env:
+  CACHE_VERSION: v1
+
+name: Regress Atlas on Ubuntu
+jobs:
+  build_test_job:
+    strategy:
+      # Strategy is a matrix of debug and release builds/regression
+      matrix:
+        os: [ubuntu-latest]
+        BUILD_TYPE: [Debug,Release]
+        COMPILER: [gcc,clang]
+
+    name: Ubuntu-${{ matrix.BUILD_TYPE }}-${{matrix.COMPILER}}
+    runs-on: ${{ matrix.os }}
+
+    # Set up a global environment variable for build scripts
+    env:
+      ATLAS_BUILD_TYPE:   ${{ matrix.BUILD_TYPE }}
+      COMPILER:           ${{ matrix.COMPILER }}
+
+    steps:
+      - name: Setup Keys
+        uses: webfactory/[email protected]
+        with:
+          ssh-private-key: ${{ secrets.SSH_PRIVATE_KEY }}
+
+      # Get Atlas
+      - name: Clone Atlas
+        uses: actions/checkout@v4
+        with:
+          submodules: recursive
+
+      # Get Sparta
+      - name: Checkout Sparta
+        uses: actions/checkout@v4
+        with:
+          repository: sparcians/map
+          path: map
+          ref: map_v2.0.14
+
+      # Setup Conda and build environment
+      - name: Grab Python v3.8
+        uses: actions/setup-python@v3
+        with:
+          python-version: 3.8
+
+      # Cache the conda dependencies to
+      - name: Cache conda deps
+        uses: actions/cache@v3
+        with:
+          key: ${{ matrix.os }}-${{ matrix.BUILD_TYPE }}-${{ matrix.COMPILER }}-conda-${{ hashFiles('conda/environment.yml') }}
+          path: /usr/share/miniconda/envs/riscv_func_model # Default path for conda
+
+      # Setup CCache to cache builds
+      - name: ccache
+        uses: hendrikmuhs/[email protected]
+        with:
+          key: ${{ matrix.os }}-${{ matrix.BUILD_TYPE }}-${{ matrix.COMPILER }}-ccache-${{ github.ref_name }}
+          restore-keys: |
+            ${{ matrix.os }}-${{ matrix.BUILD_TYPE }}-${{ matrix.COMPILER }}-ccache-master
+            ${{ matrix.os }}-${{ matrix.BUILD_TYPE }}-${{ matrix.COMPILER }}-ccache
+
+      - name: Setup Conda Environment
+        run: |
+          # $CONDA is an environment variable pointing to the root of the miniconda directory
+          $CONDA/bin/conda config --set channel_priority strict
+          $CONDA/bin/conda env update --file  ${{ github.workspace }}/conda/environment.yml
+          $CONDA/bin/conda init bash
+
+      # Build
+      - name: Build & Regress
+        run: ./.github/actions/build/entrypoint.sh
+
+      # Save error logs, etc
+      - name: Save artifacts
+        if: failure()
+        uses: actions/upload-artifact@main
+        with:
+          name: ErrorLogs-${{matrix.BUILD_TYPE}}-${{matrix.COMPILER}}
+          path: ${{matrix.BUILD_TYPE}}/test/
+
+      #- name: CTest
+      #  # Run CTests without Valgrind tests otherwise the runtime will be TOO long
+      #  if: ${{ env.DABBLE_BUILD_TYPE == 'release' }} && ${{ env.VALGRIND == 'false' }}
+      #  uses: ./.github/actions/ctest  # Uses an action.yml in directory