Replace Distributed with Malt soon! (#2240)

Co-authored-by: Fons van der Plas <fonsvdplas@gmail.com>
Co-authored-by: Panagiotis Georgakopoulos <panagiotis.georgakopoulos@juliacomputing.com>
Co-authored-by: Paul Berg <naydex.mc+github@gmail.com>

Project.toml

@@ -8,7 +8,6 @@ version = "0.19.27"
 Base64 = "2a0f44e3-6c83-55bd-87e4-b1978d98bd5f"
 Configurations = "5218b696-f38b-4ac9-8b61-a12ec717816d"
 Dates = "ade2ca70-3891-5945-98fb-dc099432e06a"
-Distributed = "8ba89e20-285c-5b6f-9357-94700520ee1b"
 FileWatching = "7b1f6079-737a-58dc-b8bc-7a2ca5c1b5ee"
 FuzzyCompletions = "fb4132e2-a121-4a70-b8a1-d5b831dcdcc2"
 HTTP = "cd3eb016-35fb-5094-929b-558a96fad6f3"
@@ -17,6 +16,7 @@ InteractiveUtils = "b77e0a4c-d291-57a0-90e8-8db25a27a240"
 Logging = "56ddb016-857b-54e1-b83d-db4d58db5568"
 LoggingExtras = "e6f89c97-d47a-5376-807f-9c37f3926c36"
 MIMEs = "6c6e2e6c-3030-632d-7369-2d6c69616d65"
+Malt = "36869731-bdee-424d-aa32-cab38c994e3b"
 Markdown = "d6f4376e-aef5-505a-96c1-9c027394607a"
 MsgPack = "99f44e22-a591-53d1-9472-aa23ef4bd671"
 Pkg = "44cfe95a-1eb2-52ea-b672-e2afdf69b78f"
@@ -39,6 +39,7 @@ HTTP = "^1.5.2"
 HypertextLiteral = "0.7, 0.8, 0.9"
 LoggingExtras = "0.4, 1"
 MIMEs = "0.1"
+Malt = "1.0.3"
 MsgPack = "1.1"
 PrecompileSignatures = "3"
 PrecompileTools = "1"

src/Configuration.jl

@@ -140,6 +140,7 @@ end
 
 const RUN_NOTEBOOK_ON_LOAD_DEFAULT = true
 const WORKSPACE_USE_DISTRIBUTED_DEFAULT = true
+const WORKSPACE_USE_DISTRIBUTED_STDLIB_DEFAULT = nothing
 const LAZY_WORKSPACE_CREATION_DEFAULT = false
 const CAPTURE_STDOUT_DEFAULT = true
 const WORKSPACE_CUSTOM_STARTUP_EXPR_DEFAULT = nothing
@@ -152,13 +153,15 @@ These options are not intended to be changed during normal use.
 
 - `run_notebook_on_load::Bool = $RUN_NOTEBOOK_ON_LOAD_DEFAULT` Whether to evaluate a notebook on load.
 - `workspace_use_distributed::Bool = $WORKSPACE_USE_DISTRIBUTED_DEFAULT` Whether to start notebooks in a separate process.
+- `workspace_use_distributed_stdlib::Bool? = $WORKSPACE_USE_DISTRIBUTED_STDLIB_DEFAULT` Should we use the Distributed stdlib to run processes? Distributed will be replaced by Malt.jl, you can use this option to already get the old behaviour. `nothing` means: determine automatically (which is currently the same as `true`).
 - `lazy_workspace_creation::Bool = $LAZY_WORKSPACE_CREATION_DEFAULT`
 - `capture_stdout::Bool = $CAPTURE_STDOUT_DEFAULT`
 - `workspace_custom_startup_expr::Union{Nothing,Expr} = $WORKSPACE_CUSTOM_STARTUP_EXPR_DEFAULT` An expression to be evaluated in the workspace process before running notebook code.
 """
 @option mutable struct EvaluationOptions
     run_notebook_on_load::Bool = RUN_NOTEBOOK_ON_LOAD_DEFAULT
     workspace_use_distributed::Bool = WORKSPACE_USE_DISTRIBUTED_DEFAULT
+    workspace_use_distributed_stdlib::Union{Bool,Nothing} = WORKSPACE_USE_DISTRIBUTED_STDLIB_DEFAULT
     lazy_workspace_creation::Bool = LAZY_WORKSPACE_CREATION_DEFAULT
     capture_stdout::Bool = CAPTURE_STDOUT_DEFAULT
     workspace_custom_startup_expr::Union{Nothing,Expr} = WORKSPACE_CUSTOM_STARTUP_EXPR_DEFAULT
@@ -292,6 +295,7 @@ function from_flat_kwargs(;
 
         run_notebook_on_load::Bool = RUN_NOTEBOOK_ON_LOAD_DEFAULT,
         workspace_use_distributed::Bool = WORKSPACE_USE_DISTRIBUTED_DEFAULT,
+        workspace_use_distributed_stdlib::Union{Bool,Nothing} = WORKSPACE_USE_DISTRIBUTED_STDLIB_DEFAULT,
         lazy_workspace_creation::Bool = LAZY_WORKSPACE_CREATION_DEFAULT,
         capture_stdout::Bool = CAPTURE_STDOUT_DEFAULT,
         workspace_custom_startup_expr::Union{Nothing,Expr} = WORKSPACE_CUSTOM_STARTUP_EXPR_DEFAULT,
@@ -340,6 +344,7 @@ function from_flat_kwargs(;
     evaluation = EvaluationOptions(;
         run_notebook_on_load,
         workspace_use_distributed,
+        workspace_use_distributed_stdlib,
         lazy_workspace_creation,
         capture_stdout,
         workspace_custom_startup_expr,