A Cargo subcommand that applies source-level patches and ast-grep rules to workspace crates before compilation.

It intercepts rustc invocations via RUSTC_WORKSPACE_WRAPPER, copies crate sources to target/cargo-stitch/<pkg>/, applies patches and ast-grep rules from stitches/<pkg>/, then compiles the patched sources.

cargo install --path .

Requires patch (usually preinstalled) and ast-grep (sg) if using ast-grep rules.

cargo stitch build
cargo stitch test
cargo stitch check
# any cargo subcommand works

Place stitch files in stitches/<crate-name>/ at the workspace root:

• .patch -- unified diff format, applied with patch -p1
• .yaml / .yml -- ast-grep rule files, applied with sg scan -r <rule> --update-all

All stitch files are applied in filename order regardless of type. Use numeric prefixes for ordering:

stitches/
  some-crate/
    001-fix-thing.patch
    002-rename-fn.yaml

If no stitches/<crate-name>/ directory exists for a crate, it compiles normally.

Inspired by cargo-fixup.

Licensed under either of Apache License, Version 2.0 or MIT license at your option.