From 2476d0851738b797dbb36c84f1ec881051831c24 Mon Sep 17 00:00:00 2001
From: Frej Drejhammar <frej.drejhammar@gmail.com>
Date: Wed, 27 Dec 2023 13:12:12 +0100
Subject: [PATCH] Run tests with multiple Python versions

Run the CI tests with both the earliest supported Python version and
the latest stable release.

The intent is to quickly notice when new features require adjusting
the oldest supported Python version and also detect when the latest
stable version breaks old code (as when 3.12 removed `imp` and we
witched to `importlib` in #311).
---
 .github/requirements-earliest.txt |  1 +
 .github/requirements-latest.txt   |  2 +
 .github/workflows/ci.yml          | 69 ++++++++++++++++++++++++++++---
 3 files changed, 67 insertions(+), 5 deletions(-)
 create mode 100644 .github/requirements-earliest.txt
 create mode 100644 .github/requirements-latest.txt

diff --git a/.github/requirements-earliest.txt b/.github/requirements-earliest.txt
new file mode 100644
index 0000000..cc72e71
--- /dev/null
+++ b/.github/requirements-earliest.txt
@@ -0,0 +1 @@
+mercurial==5.2
diff --git a/.github/requirements-latest.txt b/.github/requirements-latest.txt
new file mode 100644
index 0000000..3620838
--- /dev/null
+++ b/.github/requirements-latest.txt
@@ -0,0 +1,2 @@
+mercurial
+
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 57efee7..e511200 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -8,8 +8,70 @@ on:
     branches: [master]
 
 jobs:
-  test:
-    name: Run test suite
+  test-earliest:
+    name: Run test suite on the earliest supported Python version
+    runs-on: ubuntu-20.04
+
+    steps:
+      - uses: actions/checkout@v4
+        name: Checkout repository
+        with:
+          fetch-depth: 1
+          submodules: 'recursive'
+      - uses: actions/setup-python@v5
+        id: earliest
+        with:
+          python-version: '3.7.x'
+          check-latest: true
+          cache: 'pip'
+          cache-dependency-path: '**/requirements-earliest.txt'
+
+      - name: Install dependencies
+        run: |
+            python -m pip install --upgrade pip
+            pip install -r .github/requirements-earliest.txt
+
+      - name: Report selected versions
+        run: |
+          echo Selected '${{ steps.earliest.outputs.python-version }}'
+          ./hg-fast-export.sh --debug
+
+      - name: Run tests on earliest supported Python version
+        run: make -C t
+
+  test-latest:
+    name: Run test suite on the latest supported python version
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v4
+        name: Checkout repository
+        with:
+          fetch-depth: 1
+          submodules: 'recursive'
+      - uses: actions/setup-python@v5
+        id: latest
+        with:
+          python-version: '3.x'
+          check-latest: true
+          cache: 'pip'
+          cache-dependency-path: '**/requirements-latest.txt'
+
+      - name: Install dependencies
+        run: |
+            python -m pip install --upgrade pip
+            pip install -r .github/requirements-latest.txt
+
+      - name: Report selected version
+        run: |
+          echo Selected '${{ steps.latest.outputs.python-version }}'
+          ./hg-fast-export.sh --debug
+
+      - name: Run tests on 3.x
+        run: make -C t
+
+  code-quality:
+    name: Run code quality checks
     runs-on: ubuntu-latest
 
     steps:
@@ -19,9 +81,6 @@ jobs:
         fetch-depth: 1
         submodules: 'recursive'
 
-    - name: Run tests
-      run: make -C t
-
     - name: Initialize CodeQL
       uses: github/codeql-action/init@v2
       with: