From 431dfd9b25674c7e77e4452d82a6527f8274d10a Mon Sep 17 00:00:00 2001
From: Hendrik Ranocha <ranocha@users.noreply.github.com>
Date: Tue, 9 Jul 2024 13:25:06 +0200
Subject: [PATCH] Create Downgrade.yml (#92)

* Create Downgrade.yml

* bump minimum version of MuladdMacro for compatibility with OrdinaryDiffEq

* bump minimum compat of OrdinaryDiffEq.jl

* bump minimum version of LinearSolve for compat with SciMLBase

* Cancel redundant CI tests automatically

* bump version of FastBroadcast for ArrayInterface compat

* adapt test compat settings

* bump compat for LinearSolve to include StaticArrays bugfixes

* same for tests

* update LinearSolve again to fix StaticArray issues
---
 .github/workflows/CI.yml        |  5 ++++
 .github/workflows/Downgrade.yml | 49 +++++++++++++++++++++++++++++++++
 Project.toml                    |  8 +++---
 test/Project.toml               |  4 +--
 4 files changed, 60 insertions(+), 6 deletions(-)
 create mode 100644 .github/workflows/Downgrade.yml

diff --git a/.github/workflows/CI.yml b/.github/workflows/CI.yml
index 5710757a..381337f5 100644
--- a/.github/workflows/CI.yml
+++ b/.github/workflows/CI.yml
@@ -8,6 +8,11 @@ on:
     branches:
       - main
 
+# Cancel redundant CI tests automatically
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
 jobs:
   test:
     runs-on: ${{ matrix.os }}
diff --git a/.github/workflows/Downgrade.yml b/.github/workflows/Downgrade.yml
new file mode 100644
index 00000000..928abf06
--- /dev/null
+++ b/.github/workflows/Downgrade.yml
@@ -0,0 +1,49 @@
+name: Downgrade
+
+on:
+  pull_request:
+  workflow_dispatch:
+
+# Cancel redundant CI tests automatically
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  downgrade_test:
+    if: "!contains(github.event.head_commit.message, 'skip ci')"
+    name: Downgrade ${{ matrix.os }} - Julia ${{ matrix.version }} - ${{ github.event_name }}
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        version:
+          - '1'
+          - '1.9'
+        os:
+          - ubuntu-latest
+        arch:
+          - x64
+    steps:
+      - uses: actions/checkout@v4
+      - uses: julia-actions/setup-julia@v2
+        with:
+          version: ${{ matrix.version }}
+          arch: ${{ matrix.arch }}
+      - run: julia -e 'using InteractiveUtils; versioninfo(verbose=true)'
+      - uses: julia-actions/cache@v2
+      - uses: julia-actions/julia-downgrade-compat@v1
+        with:
+          skip: LinearAlgebra,SparseArrays
+          projects: ., test
+      - uses: julia-actions/julia-buildpkg@v1
+        env:
+          PYTHON: ""
+          GKSwstype: "100" # for Plots/GR
+      - name: Run tests without coverage
+        uses: julia-actions/julia-runtest@v1
+        with:
+          coverage: false
+        env:
+          PYTHON: ""
+          GKSwstype: "100" # for Plots/GR
diff --git a/Project.toml b/Project.toml
index d1ca22a4..5bb53446 100644
--- a/Project.toml
+++ b/Project.toml
@@ -17,11 +17,11 @@ StaticArrays = "90137ffa-7385-5640-81b9-e52037218182"
 SymbolicIndexingInterface = "2efcf032-c050-4f8e-a9bb-153293bab1f5"
 
 [compat]
-FastBroadcast = "0.2, 0.3"
+FastBroadcast = "0.2.5, 0.3"
 LinearAlgebra = "1.7"
-LinearSolve = "2"
-MuladdMacro = "0.2"
-OrdinaryDiffEq = "6"
+LinearSolve = "2.21"
+MuladdMacro = "0.2.1"
+OrdinaryDiffEq = "6.59"
 Reexport = "1"
 SciMLBase = "2"
 SimpleUnPack = "1"
diff --git a/test/Project.toml b/test/Project.toml
index 34f0cfb5..47c99d38 100644
--- a/test/Project.toml
+++ b/test/Project.toml
@@ -10,7 +10,7 @@ Test = "8dfed614-e22c-5e08-85e1-65c5234f0b40"
 
 [compat]
 Aqua = "0.7, 0.8"
-LinearSolve = "2"
-OrdinaryDiffEq = "6"
+LinearSolve = "2.21"
+OrdinaryDiffEq = "6.59"
 StaticArrays = "1.5"
 Statistics = "1"