From 71a3f3889a85e5044f87a886ddff0b6dfaaef094 Mon Sep 17 00:00:00 2001
From: Konrad Kleine <kkleine@redhat.com>
Date: Mon, 5 Feb 2024 18:12:14 +0100
Subject: [PATCH] tmt: automatically determine copr version matrix

Fixes #79
---
 .github/workflows/tmt.yml | 57 +++++++++++++++++++++++++++++++--------
 scripts/functions.sh      |  5 ++++
 2 files changed, 51 insertions(+), 11 deletions(-)

diff --git a/.github/workflows/tmt.yml b/.github/workflows/tmt.yml
index 1f996e53..306826d7 100644
--- a/.github/workflows/tmt.yml
+++ b/.github/workflows/tmt.yml
@@ -15,20 +15,55 @@ permissions:
   actions: write
 
 jobs:
+  osmatrix:
+    runs-on: ubuntu-latest
+    container:
+      image: "fedora:rawhide"
+    outputs:
+      matrix: ${{ steps.osmatrix.outputs.matrix }}
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Setup Copr config file
+        env:
+          # You need to have those secrets in your repo.
+          # See also: https://copr.fedorainfracloud.org/api/.
+          COPR_CONFIG_FILE: ${{ secrets.COPR_CONFIG }}
+        run: |
+          mkdir -p ~/.config
+          printf "$COPR_CONFIG_FILE" > ~/.config/copr
+
+      - name: Install Copr CLI and required tools
+        run: |
+          dnf install -y copr-cli
+
+      - id: osmatrix
+        shell: bash -e {0}
+        run: |
+          source scripts/functions.sh
+
+          # Get OS versions comma separated with properly quoted rawhide
+          os_versions=`get_os_versions | paste -sd "," - | sed 's/rawhide/"rawhide"/'`
+
+          cat <<EOF > /tmp/osmatrix
+          matrix={
+            "version": [$os_versions]
+            "strategy": [standalone, big-merge, bootstrap],
+            "include": [
+              {"strategy": "standalone", "copr_project_tpl": "llvm-snapshots-incubator-YYYYMMDD"},
+              {"strategy": "big-merge",  "copr_project_tpl": "llvm-snapshots-big-merge-YYYYMMDD"},
+              {"strategy": "bootstrap",  "copr_project_tpl": "llvm-snapshots-bootstrap-YYYYMMDD"}
+            ]
+          }
+          EOF
+
+          # Store the output
+          cat /tmp/osmatrix | tr '\n' ' ' >> $GITHUB_OUTPUT
   run-tmt:
+    needs: osmatrix
     strategy:
       fail-fast: false
-      matrix:
-        os: [fedora]
-        version: [38, 39, rawhide]
-        strategy: [standalone, big-merge, bootstrap]
-        include:
-          - strategy: standalone
-            copr_project_tpl: "llvm-snapshots-incubator-YYYYMMDD"
-          - strategy: big-merge
-            copr_project_tpl: "llvm-snapshots-big-merge-YYYYMMDD"
-          - strategy: bootstrap
-            copr_project_tpl: "llvm-snapshots-bootstrap-YYYYMMDD"
+      matrix: ${{ fromJSON(needs.osmatrix.outputs.matrix) }}
     runs-on: ubuntu-latest
     container:
       image: "${{ matrix.os }}:${{ matrix.version }}"
diff --git a/scripts/functions.sh b/scripts/functions.sh
index 6f2e3faf..802375f5 100644
--- a/scripts/functions.sh
+++ b/scripts/functions.sh
@@ -59,6 +59,11 @@ function get_chroots() {
   copr list-chroots | grep -P '^fedora-(rawhide|[0-9]+)' | sort | tr '\n' ' '
 }
 
+# Returns the Fedora OS versions (including rawhide) that are supported by copr
+function get_os_versions() {
+  get_chroots | grep -ioP 'fedora-\K[0-9,rawhide]+' | sort | uniq
+}
+
 # Prints the packages we care about
 function get_packages() {
   echo "python-lit llvm clang lld compiler-rt libomp"