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Proof of Concept of Rust in CPython #11

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f1f7481
MVP Rust in CPython
emmatyping Nov 14, 2025
3234e73
Add vendored sources
emmatyping Nov 14, 2025
81d46e3
Remove wrapper.h, it should be generated
emmatyping Nov 14, 2025
3dc0283
Make Rust extensions work on macOS (#12)
Eclips4 Nov 15, 2025
b8d6ea3
Faster `_base.b64encode` with custom implementation (#13)
Eclips4 Nov 16, 2025
69f4d16
Remove vendored code
emmatyping Nov 16, 2025
35cdedb
Restore name to standard_b64encode (#14)
Eclips4 Nov 16, 2025
6f5bc87
Update Rust detection and binding generation (#15)
emmatyping Nov 17, 2025
c9deee6
Make Rust build work on more platforms (#16)
Eclips4 Nov 17, 2025
071b7f1
Fix cargo path and add CARGO_TARGET for cross compile (#19)
youknowone Nov 19, 2025
c66a76e
Split standard_b64encode_impl (#17)
youknowone Nov 24, 2025
c913bd2
Group unsafe BorrowedBuffer initialization (#22)
youknowone Nov 25, 2025
e7fe182
Run rustfmt (#21)
youknowone Nov 25, 2025
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3 changes: 3 additions & 0 deletions .gitignore
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Expand Up @@ -178,3 +178,6 @@ CLAUDE.local.md
#### main branch only stuff below this line, things to backport go above. ####
# main branch only: ABI files are not checked/maintained.
Doc/data/python*.abi

# Rust build artifacts
/target/
235 changes: 235 additions & 0 deletions Cargo.lock
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6 changes: 6 additions & 0 deletions Cargo.toml
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@@ -0,0 +1,6 @@
[workspace]
resolver = "3"
members = [
"Modules/_base64",
"Modules/cpython-sys"
]
16 changes: 15 additions & 1 deletion Makefile.pre.in
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Expand Up @@ -58,6 +58,10 @@ DTRACE_HEADERS= @DTRACE_HEADERS@
DTRACE_OBJS= @DTRACE_OBJS@
DSYMUTIL= @DSYMUTIL@
DSYMUTIL_PATH= @DSYMUTIL_PATH@
CARGO_HOME=@CARGO_HOME@
CARGO_TARGET_DIR=@CARGO_TARGET_DIR@
CARGO_PROFILE=@CARGO_PROFILE@
CARGO_TARGET=@CARGO_TARGET@

GNULD= @GNULD@

Expand Down Expand Up @@ -3254,8 +3258,15 @@ profile-removal:
rm -f profile-run-stamp
rm -f profile-bolt-stamp

.PHONY: clean-rust
clean-rust:
@if test @CARGO_HOME@ != ''; then \
echo Running cargo clean...; \
$(CARGO_HOME)/bin/cargo clean; \
fi

.PHONY: clean
clean: clean-retain-profile clean-bolt
clean: clean-retain-profile clean-bolt clean-rust
@if test @DEF_MAKE_ALL_RULE@ = profile-opt -o @DEF_MAKE_ALL_RULE@ = bolt-opt; then \
rm -f profile-gen-stamp profile-clean-stamp; \
$(MAKE) profile-removal; \
Expand Down Expand Up @@ -3362,6 +3373,9 @@ Python/thread.o: @THREADHEADERS@ $(srcdir)/Python/condvar.h
##########################################################################
# Module dependencies and platform-specific files

cpython-sys: Modules/cpython-sys/Cargo.toml Modules/cpython-sys/build.rs Modules/cpython-sys/wrapper.h Modules/cpython-sys/parser.h
CARGO_TARGET_DIR=$(abs_builddir)/target PYTHON_BUILD_DIR=$(abs_builddir) \$(CARGO_HOME)/bin/cargo build --lib --locked --package cpython-sys --profile $(CARGO_PROFILE) $(if $(CARGO_TARGET),--target=$(CARGO_TARGET)) --manifest-path $(srcdir)/Cargo.toml

# force rebuild when header file or module build flavor (static/shared) is changed
MODULE_DEPS_STATIC=Modules/config.c
MODULE_DEPS_SHARED=@MODULE_DEPS_SHARED@
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1 change: 1 addition & 0 deletions Modules/Setup
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Expand Up @@ -182,6 +182,7 @@ PYTHONPATH=$(COREPYTHONPATH)
#_codecs_tw cjkcodecs/_codecs_tw.c
#_multibytecodec cjkcodecs/multibytecodec.c
#unicodedata unicodedata.c
#_base64 _base64/Cargo.toml _base64/src/lib.rs lib_base64.a

# Modules with some UNIX dependencies

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5 changes: 5 additions & 0 deletions Modules/Setup.stdlib.in
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Expand Up @@ -117,6 +117,11 @@
@MODULE__MULTIBYTECODEC_TRUE@_multibytecodec cjkcodecs/multibytecodec.c
@MODULE_UNICODEDATA_TRUE@unicodedata unicodedata.c

############################################################################
# Rust modules
#
@MODULE__BASE64_TRUE@_base64 _base64/Cargo.toml _base64/src/lib.rs lib_base64.a

############################################################################
# Modules with some UNIX dependencies
#
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11 changes: 11 additions & 0 deletions Modules/_base64/Cargo.toml
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@@ -0,0 +1,11 @@
[package]
name = "_base64"
version = "0.1.0"
edition = "2024"

[dependencies]
cpython-sys ={ path = "../cpython-sys" }
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@alex alex Nov 26, 2025

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I think we should specify this as a workspace dep for simplicity.

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@emmatyping emmatyping Nov 26, 2025

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Agreed!


[lib]
name = "_base64"
crate-type = ["staticlib"]
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