Add optional softscoping

Uses `SoftGlobalScope` to mimic IJulia behaviour for notebooks.
This eliminates the need of `global`  in loops at top level.
Optionally, this could be enabled for jmd files as well

Project.toml

@@ -15,6 +15,7 @@ REPL = "3fa0cd96-eef1-5676-8a61-b3b8758bbffb"
 RelocatableFolders = "05181044-ff0b-4ac5-8273-598c1e38db00"
 Requires = "ae029012-a4dd-5104-9daa-d747884805df"
 Serialization = "9e88b42a-f829-5b0c-bbe9-9e923198166b"
+SoftGlobalScope = "b85f4697-e234-5449-a836-ec8e2f98b302"
 YAML = "ddb6d928-2868-570f-bddf-ab3f9cf99eb6"
 
 [compat]

src/Weave.jl

@@ -1,6 +1,6 @@
 module Weave
 
-using Highlights, Mustache, Requires, Pkg, REPL, RelocatableFolders, Base64
+using Highlights, Mustache, Requires, Pkg, REPL, RelocatableFolders, Base64, SoftGlobalScope
 
 # directories
 const PKG_DIR = normpath(@__DIR__, "..")

src/config.jl

@@ -24,6 +24,7 @@ const _DEFAULT_PARAMS = Dict{Symbol,Any}(
     :fig_env => nothing,
     :out_width => nothing,
     :out_height => nothing,
+    :softscope => false,
 )
 const DEFAULT_PARAMS = deepcopy(_DEFAULT_PARAMS) # might be changed at runtime
 

src/reader/notebook.jl

@@ -7,7 +7,7 @@ function parse_notebook(document_body)
     doc_no = 0
 
     # TODO: handle some of options ?
-    options = Dict{Symbol,Any}()
+    options = Dict{Symbol,Any}(:softscope => true)
     opt_string = ""
 
     chunks = map(nb["cells"]) do cell

src/run.jl

@@ -189,8 +189,9 @@ function run_code(doc::WeaveDoc, chunk::CodeChunk, report::Report, mod::Module)
     code = chunk.content
     path = doc.path
     error = chunk.options[:error]
+    softscope = chunk.options[:softscope]
     codes = chunk.options[:term] ? split_code(code) : [code]
-    capture = code -> capture_output(code, mod, path, error, report)
+    capture = code -> capture_output(code, mod, path, error, report, softscope)
     return capture.(codes)
 end
 
@@ -207,7 +208,7 @@ function split_code(code)
     return res
 end
 
-function capture_output(code, mod, path, error, report)
+function capture_output(code, mod, path, error, report, softscope=false)
     reset_report!(report)
 
     old = stdout
@@ -217,7 +218,7 @@ function capture_output(code, mod, path, error, report)
     local out = nothing
     task_local_storage(:SOURCE_PATH, path) do
         try
-            obj = include_string(mod, code, path) # TODO: fix line number
+            obj = softscope ? softscope_include_string(mod, code, path) : include_string(mod, code, path) # TODO: fix line number
             !isnothing(obj) && !REPL.ends_with_semicolon(code) && display(obj)
         catch _err
             err = unwrap_load_err(_err)