From b52137c71c948fb45825ec084e7bb51b99a5caee Mon Sep 17 00:00:00 2001
From: Shashi Gowda <shashigowda91@gmail.com>
Date: Tue, 16 Jul 2019 13:23:23 -0400
Subject: [PATCH] use Requires to suppress Cassette overwrite warnings. No idea
 how but it works

---
 Project.toml           |  1 +
 src/SparseDiffTools.jl | 21 +++++++++++++--------
 2 files changed, 14 insertions(+), 8 deletions(-)

diff --git a/Project.toml b/Project.toml
index 057d5355..cc65d1ca 100644
--- a/Project.toml
+++ b/Project.toml
@@ -11,6 +11,7 @@ DiffEqDiffTools = "01453d9d-ee7c-5054-8395-0335cb756afa"
 ForwardDiff = "f6369f11-7733-5829-9624-2563aa707210"
 LightGraphs = "093fc24a-ae57-5d10-9952-331d41423f4d"
 LinearAlgebra = "37e2e46d-f89d-539d-b4ee-838fcccc9c8e"
+Requires = "ae029012-a4dd-5104-9daa-d747884805df"
 Random = "9a3f8284-a2c9-5f02-9a11-845980a1fd5c"
 SparseArrays = "2f01184e-e22b-5df5-ae63-d93ebab69eaf"
 SpecialFunctions = "276daf66-3868-5448-9aa4-cd146d93841b"
diff --git a/src/SparseDiffTools.jl b/src/SparseDiffTools.jl
index 192f0065..b2b55c0a 100644
--- a/src/SparseDiffTools.jl
+++ b/src/SparseDiffTools.jl
@@ -6,6 +6,7 @@ using SparseArrays, LinearAlgebra, BandedMatrices, BlockBandedMatrices,
 using BlockBandedMatrices:blocksize,nblocks
 using ForwardDiff: Dual, jacobian, partials, DEFAULT_CHUNK_THRESHOLD
 
+using Requires
 using Cassette
 import Cassette: tag, untag, Tagged, metadata, hasmetadata, istagged, canrecurse
 import Cassette: tagged_new_tuple, ContextTagged, BindingMeta, DisableHooks, nametype
@@ -40,13 +41,17 @@ include("coloring/greedy_star2_coloring.jl")
 include("coloring/matrix2graph.jl")
 include("differentiation/compute_jacobian_ad.jl")
 include("differentiation/jaches_products.jl")
-include("program_sparsity/program_sparsity.jl")
-include("program_sparsity/sparsity_tracker.jl")
-include("program_sparsity/path.jl")
-include("program_sparsity/take_all_branches.jl")
-include("program_sparsity/terms.jl")
-include("program_sparsity/linearity.jl")
-include("program_sparsity/hessian.jl")
-include("program_sparsity/blas.jl")
+function __init__()
+    @require Cassette="7057c7e9-c182-5462-911a-8362d720325c" begin
+        include("program_sparsity/program_sparsity.jl")
+        include("program_sparsity/sparsity_tracker.jl")
+        include("program_sparsity/path.jl")
+        include("program_sparsity/take_all_branches.jl")
+        include("program_sparsity/terms.jl")
+        include("program_sparsity/linearity.jl")
+        include("program_sparsity/hessian.jl")
+        include("program_sparsity/blas.jl")
+    end
+end
 
 end # module