use Scratch.jl

Project.toml

@@ -1,24 +1,26 @@
 name = "OpenML"
 uuid = "8b6db2d4-7670-4922-a472-f9537c81ab66"
 authors = ["Diego Arenas <darenasc@gmail.com>", "Anthony D. Blaom <anthony.blaom@gmail.com>"]
-version = "0.3.0"
+version = "0.3.1"
 
 [deps]
 ARFFFiles = "da404889-ca92-49ff-9e8b-0aa6b4d38dc8"
 HTTP = "cd3eb016-35fb-5094-929b-558a96fad6f3"
 JSON = "682c06a0-de6a-54ab-a142-c8b1cf79cde6"
 Markdown = "d6f4376e-aef5-505a-96c1-9c027394607a"
 Pkg = "44cfe95a-1eb2-52ea-b672-e2afdf69b78f"
+Scratch = "6c6a2e73-6563-6170-7368-637461726353"
 
 [compat]
 ARFFFiles = "1.4.1"
-HTTP = "0.8, 0.9,1"
+HTTP = "0.8, 0.9, 1"
 JSON = "0.21"
 julia = "1"
 
 [extras]
 Tables = "bd369af6-aec1-5ad0-b16a-f7cc5008161c"
 Test = "8dfed614-e22c-5e08-85e1-65c5234f0b40"
+Logging = "56ddb016-857b-54e1-b83d-db4d58db5568"
 
 [targets]
-test = ["Tables", "Test"]
+test = ["Tables", "Test", "Logging"]

src/OpenML.jl

@@ -4,12 +4,16 @@ using HTTP
 using JSON
 import ARFFFiles
 using Markdown
-if VERSION > v"1.3.0"
-    using Pkg.Artifacts
-end
+using Scratch
 
 export OpenML
 
+download_cache = ""
+
 include("data.jl")
 
+function __init__()
+    global download_cache = @get_scratch!("datasets")
+end
+
 end # module

src/data.jl

@@ -67,24 +67,12 @@ peek_table = OpenML.load(61, maxbytes = 1024) # load only the first 1024 bytes o
 ```
 """
 function load(id::Int; maxbytes = nothing)
-    if VERSION > v"1.3.0"
-        dir = first(Artifacts.artifacts_dirs())
-        toml = joinpath(dir, "OpenMLArtifacts.toml")
-        hash = artifact_hash(string(id), toml)
-        if hash === nothing || !artifact_exists(hash)
-            hash = Artifacts.create_artifact() do artifact_dir
-                url = load_Dataset_Description(id)["data_set_description"]["url"]
-                download(url, joinpath(artifact_dir, "$id.arff"))
-            end
-            bind_artifact!(toml, string(id), hash)
-        end
-        filename = joinpath(artifact_path(hash), "$id.arff")
-    else
-        url = load_Dataset_Description(id)["data_set_description"]["url"]
-        filename = tempname()
-        download(url, filename)
+    fname = joinpath(download_cache, "$id.arff")
+    if !isfile(fname)
+        @info "Downloading dataset $id."
+        download(load_Dataset_Description(id)["data_set_description"]["url"], fname)
     end
-    ARFFFiles.load(x -> ARFFFiles.readcolumns(x; maxbytes = maxbytes), filename)
+    ARFFFiles.load(x -> ARFFFiles.readcolumns(x; maxbytes = maxbytes), fname)
 end
 
 

test/data.jl

@@ -40,15 +40,22 @@ end
     @test length(filters_test["data"]["dataset"][1]) == offset
 end
 
-if VERSION > v"1.3.0"
-    using Pkg
-    @testset "artifacts" begin
-        dir = first(Pkg.Artifacts.artifacts_dirs())
-        toml = joinpath(dir, "OpenMLArtifacts.toml")
-        hash = Pkg.Artifacts.artifact_hash("61", toml)
-        @test Pkg.Artifacts.artifact_exists(hash)
+@testset "scratch" begin
+    OpenML.load(61)
+    fname = joinpath(OpenML.download_cache, "61.arff")
+    @test isfile(fname)
+    using Logging
+    io = IOBuffer()
+    logger = SimpleLogger(io)
+    with_logger(logger) do
+        OpenML.load(61)
     end
+    @test match(r"Downloading dataset 61", String(take!(io))) === nothing
+    rm(fname)
+    with_logger(logger) do
+        OpenML.load(61)
+    end
+    @test match(r"Downloading dataset 61", String(take!(io))) !== nothing
 end
 
 end
-true