add workflow to test conda installs

.github/scripts/test_conda_install.sh

@@ -0,0 +1,33 @@
+#!/usr/bin/env bash
+
+set -eux -o pipefail
+
+case ${GPUARCH_PKG} in
+    cpuonly)
+        GPUARCH_IDENTIFIER="cpu"
+        ;;
+    cudatoolkit=11.3)
+        GPUARCH_IDENTIFIER='cu.*11\?.3'
+        ;;
+esac
+
+TMPFILE=$(mktemp)
+
+EXTRA_CONDA_CHANNEL_FLAGS=${EXTRA_CONDA_CHANNEL_FLAGS:-}
+EXTRA_CONDA_PKGS=${EXTRA_CONDA_PKGS:-}
+PYTORCH_CONDA_INSTALL_CHANNEL=${PYTORCH_CONDA_INSTALL_CHANNEL:-pytorch-test}
+
+conda create -y \
+    -n testenv \
+    --dry-run \
+    -c "${PYTORCH_CONDA_INSTALL_CHANNEL}" \
+    ${EXTRA_CONDA_CHANNEL_FLAGS} \
+    python=${PYTHON_VERSION} \
+    ${EXTRA_CONDA_PKGS} \
+    "pytorch=${PYTORCH_VERSION}" \
+    "torchvision=${TORCHVISION_VERSION}" \
+    "${GPUARCH_PKG}" | tee "${TMPFILE}"
+
+# If the pkg wasn't resolved correctly it'll fail out here
+grep "${PYTORCH_CONDA_INSTALL_CHANNEL}/linux-64::pytorch-${PYTORCH_VERSION}.*${GPUARCH_IDENTIFIER}" "${TMPFILE}"
+grep "${PYTORCH_CONDA_INSTALL_CHANNEL}/linux-64::torchvision-${TORCHVISION_VERSION}.*${GPUARCH_IDENTIFIER}" "${TMPFILE}"

.github/workflows/test_conda_installs.yml

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+name: Test Conda Installations
+
+on:
+  workflow_dispatch:
+  pull_request:
+    paths:
+      - .github/workflows/test_conda_installs.yml
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        gpuarch_pkg: [cpuonly, cudatoolkit=11.3]
+    container: continuumio/miniconda3
+    env:
+      GPUARCH_PKG: ${{ matrix.gpuarch_pkg }}
+      PYTHON_VERSION: 3.7 # TODO: Update this to include more versions
+    steps:
+      - uses: actions/checkout@v2
+      - name: Populate test versions into env
+        run:
+          cat TEST_VERSIONS >> "${GITHUB_ENV}"
+      - name: Test
+        run: |
+          .github/scripts/test_conda_install.sh
+      - name: Test with conda-forge
+        run: |
+          EXTRA_CONDA_CHANNEL_FLAGS="-c conda-forge" .github/scripts/test_conda_install.sh
+      - name: Test with conda-forge and extra pkgs (opencv, dlib)
+        run: |
+          EXTRA_CONDA_CHANNEL_FLAGS="-c conda-forge" EXTRA_CONDA_PKGS="opencv dlib" .github/scripts/test_conda_install.sh

TEST_VERSIONS

@@ -0,0 +1,2 @@
+PYTORCH_VERSION=1.10.0
+TORCHVISION_VERSION=0.11.0