Simplify BLIS integration to use existing test framework

- Removed dedicated BLIS test files and test group
- Added BLISLUFactorization to existing test loops in basictests.jl
- Added conditional loading of BLIS dependencies in tests
- BLIS tests now run as part of standard "Concrete Factorizations" test suite
- Tests are automatically skipped if BLIS dependencies are not available

This follows the established pattern used by other factorization methods like MKL,
making the integration cleaner and more maintainable.

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <[email protected]>

Author: ChrisRackauckas

Project.toml

@@ -45,8 +45,8 @@ Pardiso = "46dd5b70-b6fb-5a00-ae2d-e8fea33afaf2"
 RecursiveArrayTools = "731186ca-8d62-57ce-b412-fbd966d074cd"
 
 [extensions]
-LinearSolveBandedMatricesExt = "BandedMatrices"
 LinearSolveBLISExt = ["blis_jll", "LAPACK_jll"]
+LinearSolveBandedMatricesExt = "BandedMatrices"
 LinearSolveBlockDiagonalsExt = "BlockDiagonals"
 LinearSolveCUDAExt = "CUDA"
 LinearSolveEnzymeExt = "Enzyme"
@@ -61,7 +61,6 @@ LinearSolveRecursiveArrayToolsExt = "RecursiveArrayTools"
 [compat]
 ArrayInterface = "7.4.11"
 BandedMatrices = "1"
-blis_jll = "0.9.0"
 BlockDiagonals = "0.1"
 ConcreteStructs = "0.2"
 DocStringExtensions = "0.9"
@@ -72,13 +71,13 @@ GPUArraysCore = "0.1"
 HYPRE = "1.4.0"
 InteractiveUtils = "1.6"
 IterativeSolvers = "0.9.3"
-Libdl = "1.6"
-LinearAlgebra = "1.9"
 KLU = "0.3.0, 0.4"
 KernelAbstractions = "0.9"
 Krylov = "0.9"
 KrylovKit = "0.6"
+Libdl = "1.6"
 LAPACK_jll = "3"
+LinearAlgebra = "1.9"
 PrecompileTools = "1"
 Preferences = "1"
 RecursiveArrayTools = "2"
@@ -91,6 +90,7 @@ Setfield = "1"
 SparseArrays = "1.9"
 Sparspak = "0.3.6"
 UnPack = "1"
+blis_jll = "0.9.0"
 julia = "1.9"
 
 [extras]

test/basictests.jl

@@ -4,6 +4,13 @@ using IterativeSolvers, KrylovKit, MKL_jll
 using Test
 import Random
 
+# Try to load BLIS extension
+try
+    using blis_jll, LAPACK_jll
+catch LoadError
+    # BLIS dependencies not available, tests will be skipped
+end
+
 const Dual64 = ForwardDiff.Dual{Nothing, Float64, 1}
 
 n = 8
@@ -230,6 +237,11 @@ end
     if VERSION >= v"1.9" && LinearSolve.usemkl
         push!(test_algs, MKLLUFactorization())
     end
+    
+    # Test BLIS if extension is available
+    if Base.get_extension(LinearSolve, :LinearSolveBLISExt) !== nothing
+        push!(test_algs, BLISLUFactorization())
+    end
 
     @testset "Concrete Factorizations" begin
         for alg in test_algs

test/blis/Project.toml

@@ -32,13 +32,6 @@ if GROUP == "LinearSolvePardiso"
     @time @safetestset "Pardiso" include("pardiso/pardiso.jl")
 end
 
-if GROUP == "LinearSolveBLIS"
-    Pkg.activate("blis")
-    Pkg.develop(PackageSpec(path = dirname(@__DIR__)))
-    Pkg.instantiate()
-    @time @safetestset "BLIS" include("blis/blis.jl")
-end
-
 if Base.Sys.islinux() && (GROUP == "All" || GROUP == "LinearSolveHYPRE") && HAS_EXTENSIONS
     @time @safetestset "LinearSolveHYPRE" include("hypretests.jl")
 end