From 123afad33a170da55f68a861f3212ebb412f02b4 Mon Sep 17 00:00:00 2001
From: Walter Boring <waboring@hemna.com>
Date: Thu, 3 Sep 2026 11:12:11 -0400
Subject: [PATCH 1/4] Add GitHub Actions CI for lint and tests

---
 .github/workflows/ci.yml | 50 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 50 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..f1fe2fd
--- /dev/null
+++ b/.github/workflows/ci.yml
@@ -0,0 +1,50 @@
+name: CI
+
+on:
+  pull_request:
+    branches:
+      - master
+  push:
+    branches:
+      - master
+
+permissions:
+  contents: read
+
+jobs:
+  lint:
+    name: Lint
+    runs-on: ubuntu-latest
+    steps:
+      - name: Check out repository
+        uses: actions/checkout@v4
+      - name: Set up Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: '3.12.13'
+      - name: Install dependencies
+        run: |
+          python -m pip install --upgrade pip
+          python -m pip install -r requirements.txt -r test-requirements.txt
+      - name: Run flake8
+        run: flake8 .
+
+  unit-tests:
+    name: Unit tests
+    runs-on: ubuntu-latest
+    steps:
+      - name: Check out repository
+        uses: actions/checkout@v4
+      - name: Set up Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: '3.12.13'
+      - name: Install dependencies
+        run: |
+          python -m pip install --upgrade pip
+          python -m pip install -r requirements.txt -r test-requirements.txt
+      - name: Run unit tests
+        run: stestr run
+      - name: Show slowest tests
+        if: always()
+        run: stestr slowest

From 0703f0aa211468fbbdf24436eae1cf30c8cf6abd Mon Sep 17 00:00:00 2001
From: Walter Boring <waboring@hemna.com>
Date: Thu, 3 Sep 2026 11:17:10 -0400
Subject: [PATCH 2/4] Fix CI tool compatibility and empty test discovery

---
 .github/workflows/ci.yml | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index f1fe2fd..c2b2320 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -26,6 +26,7 @@ jobs:
         run: |
           python -m pip install --upgrade pip
           python -m pip install -r requirements.txt -r test-requirements.txt
+          python -m pip install 'importlib-metadata<5'
       - name: Run flake8
         run: flake8 .
 
@@ -44,7 +45,9 @@ jobs:
           python -m pip install --upgrade pip
           python -m pip install -r requirements.txt -r test-requirements.txt
       - name: Run unit tests
-        run: stestr run
-      - name: Show slowest tests
-        if: always()
-        run: stestr slowest
+        run: |
+          if [ -d openstack_exporter/tests ]; then
+            stestr run
+          else
+            echo "No OpenStack exporter tests are present on this revision."
+          fi

From 38649259423f5b196243241dc3c0bab303701ded Mon Sep 17 00:00:00 2001
From: Walter Boring <waboring@hemna.com>
Date: Thu, 3 Sep 2026 11:19:22 -0400
Subject: [PATCH 3/4] Pin compatible importlib metadata version

---
 .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 c2b2320..cf57167 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -26,7 +26,7 @@ jobs:
         run: |
           python -m pip install --upgrade pip
           python -m pip install -r requirements.txt -r test-requirements.txt
-          python -m pip install 'importlib-metadata<5'
+          python -m pip install --force-reinstall 'importlib-metadata==4.13.0'
       - name: Run flake8
         run: flake8 .
 

From 05f4b29f936affca06c1c3e467fb0a29cf1ebeb7 Mon Sep 17 00:00:00 2001
From: Walter Boring <waboring@hemna.com>
Date: Thu, 3 Sep 2026 11:24:03 -0400
Subject: [PATCH 4/4] Use Python 3.12 compatible lint tooling

---
 .github/workflows/ci.yml | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index cf57167..5a1dc83 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -26,7 +26,12 @@ jobs:
         run: |
           python -m pip install --upgrade pip
           python -m pip install -r requirements.txt -r test-requirements.txt
-          python -m pip install --force-reinstall 'importlib-metadata==4.13.0'
+          # hacking 3.1 pins flake8 3.8, which cannot run on Python 3.12.
+          python -m pip install --no-deps \
+            'flake8==5.0.4' \
+            'pycodestyle==2.9.1' \
+            'pyflakes==2.5.0' \
+            'mccabe==0.7.0'
       - name: Run flake8
         run: flake8 .