Merge pull request #1145 from JuliaLang/kernel-struct

Giant refactor to move all state into a Kernel struct

Author: JamesWrigley

CondaPkg.toml

@@ -0,0 +1,3 @@
+[deps]
+jupyter_client = ""
+jupyter_kernel_test = ""

Project.toml

@@ -11,10 +11,12 @@ JSON = "682c06a0-de6a-54ab-a142-c8b1cf79cde6"
 Logging = "56ddb016-857b-54e1-b83d-db4d58db5568"
 Markdown = "d6f4376e-aef5-505a-96c1-9c027394607a"
 Pkg = "44cfe95a-1eb2-52ea-b672-e2afdf69b78f"
+PrecompileTools = "aea7be01-6a6a-4083-8856-8a6e6704d82a"
 Printf = "de0858da-6303-5e67-8744-51eddeeeb8d7"
 REPL = "3fa0cd96-eef1-5676-8a61-b3b8758bbffb"
 Random = "9a3f8284-a2c9-5f02-9a11-845980a1fd5c"
 SHA = "ea8e919c-243c-51af-8825-aaa63cd721ce"
+Sockets = "6462fe0b-24de-5631-8697-dd941f90decc"
 SoftGlobalScope = "b85f4697-e234-5449-a836-ec8e2f98b302"
 UUIDs = "cf7118a7-6976-5b1a-9a39-7adc72f591a4"
 ZMQ = "c2297ded-f4af-51ae-bb23-16f91089e4e1"
@@ -28,10 +30,12 @@ JSON = "0.18,0.19,0.20,0.21,1"
 Logging = "1"
 Markdown = "1"
 Pkg = "1"
+PrecompileTools = "1.2.1"
 Printf = "1"
 REPL = "1"
 Random = "1"
 SHA = "0.7, 1"
+Sockets = "1"
 SoftGlobalScope = "1"
 UUIDs = "1"
 ZMQ = "1.3"

deps/kspec.jl

@@ -3,7 +3,7 @@ import JSON
 #######################################################################
 # Install Jupyter kernel-spec files.
 
-copy_config(src, dest) = cp(src, joinpath(dest, basename(src)), force=true)
+copy_config(src::AbstractString, dest::AbstractString) = cp(src, joinpath(dest, basename(src)), force=true)
 
 # return the user kernelspec directory, according to
 #     https://jupyter-client.readthedocs.io/en/latest/kernels.html#kernelspecs

docs/src/_changelog.md

@@ -7,6 +7,20 @@ CurrentModule = IJulia
 This documents notable changes in IJulia.jl. The format is based on [Keep a
 Changelog](https://keepachangelog.com).
 
+## Unreleased
+
+### Added
+- Implemented [`reset_stdio_count()`](@ref) to provide a public API for
+  resetting the stdio count ([#1145]).
+
+### Changed
+- IJulia was completely refactored to minimize global state ([#1145]). This
+  allows for better testing (for the first time we can test kernel execution)
+  and for executing precompilation workloads. We've tried to avoid any breaking
+  changes but it's possible that some packages may be relying on internals that
+  have changed. If you have any problems with this release please open an issue
+  on Github so we can help.
+
 ## [v1.29.2] - 2025-07-29
 
 ### Fixed

docs/src/library/internals.md

@@ -59,8 +59,6 @@ IJulia.waitloop
 
 ```@docs
 IJulia.IJuliaStdio
-IJulia.capture_stdout
-IJulia.capture_stderr
 IJulia.watch_stream
 ```
 

docs/src/library/public.md

@@ -45,4 +45,5 @@ IJulia.load_string
 ```@docs
 IJulia.readprompt
 IJulia.set_max_stdio
+IJulia.reset_stdio_count
 ```