[llvm] workflows: Fix baseline version for llvm abi checks (PR #85166)

[Nikita Popov via llvm-commits]

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@@ -58,15 +59,27 @@ jobs:
       - name: Setup Variables
         id: vars
         run: |
-          if [ ${{ steps.version.outputs.LLVM_VERSION_MINOR }} -ne 0 ] || [ ${{ steps.version.outputs.LLVM_VERSION_PATCH }} -eq 0 ]; then
+          # libLLVM:
+          # 18.1.0 we aren't doing ABI checks.
+          # 18.1.1 We want to check 18.1.0.
+          # libclang:
+          # 18.1.0 We want to check 17.0.x
+          # 18.1.1 We want to check 18.1.0
+          if [ ${{ steps.version.outputs.LLVM_VERSION_PATCH }} -eq 0 ]; then
             {
               echo "BASELINE_VERSION_MAJOR=$(( ${{ steps.version.outputs.LLVM_VERSION_MAJOR }} - 1))"
               echo "ABI_HEADERS=llvm-c"
+              if [ "${{ steps.version.outputs.LLVM_VERSION_MAJOR }}" -le 18 ]; then
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nikic wrote:

Do we need this, given that we're not going to make changes to older versions anymore?

https://github.com/llvm/llvm-project/pull/85166