add CI job for local installations (#124)

.github/workflows/install.yml

@@ -128,3 +128,41 @@ jobs:
               actual = CPUBackend()
 
           sys.exit(actual != expected)
+
+  local:
+    strategy:
+      matrix:
+        local-project-stub:
+          - pep517-setuptools
+      fail-fast: false
+
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v3
+        with:
+          fetch-depth: 0
+
+      - name: Setup development environment
+        uses: ./.github/actions/setup-dev-env
+
+      - name: Collect environment information
+        run: python scripts/collect_env.py
+
+      - name: Install local project with PyTorch dependency
+        run: ltt install --editable local-project-stubs/${{ matrix.local-project-stub }}
+
+      - name: Check if CPU only
+        shell: python
+        run: |
+          import sys
+          import torch
+
+          cuda = torch.version.cuda
+          print(f"cuda = {cuda}")
+
+          hip = torch.version.hip
+          print(f"hip = {hip}")
+
+          sys.exit(cuda or hip)

light_the_torch/_patch.py

@@ -252,6 +252,12 @@ def get_extra_index_urls(computation_backends, channel):
 def patch_link_collection_with_supply_chain_attack_mitigation(
     computations_backends, channel
 ):
+    def is_pinned(requirement):
+        if requirement.req is None:
+            return False
+
+        return requirement.is_pinned
+
     @contextlib.contextmanager
     def context(input):
         with patch_link_collection(
@@ -261,7 +267,7 @@ def context(input):
                 requirement.name
                 for requirement in input.root_reqs
                 if requirement.user_supplied
-                and not requirement.is_pinned
+                and not is_pinned(requirement)
                 and requirement.name in THIRD_PARTY_PACKAGES
             },
         ):

local-project-stubs/pep517-setuptools/pyproject.toml

@@ -0,0 +1,7 @@
+[build-system]
+requires = [
+  "setuptools>=42",
+  "setuptools_scm[toml]>=3.4",
+  "wheel",
+]
+build-backend = "setuptools.build_meta"

local-project-stubs/pep517-setuptools/setup.cfg

@@ -0,0 +1,7 @@
+[metadata]
+name = light-the-torch-test-package
+version = 1.2.3
+
+[options]
+install_requires =
+    torch