ekp/CONTRIBUTING.md
Kinneyzhang 83352c4571 feat!: add source-clean live buffer layout
Replace the physical ekp-region renderer with ekp-buffer text-property projection backed by shared semantic layout plans and stable live-edit transactions.

Optimize the C-backed resize hot path, and add deterministic performance, ERT, GUI, fuzz, release, and documentation coverage for task017 through task032.

BREAKING CHANGE: require ekp-buffer instead of ekp-region and rename module-owned ekp-region-* settings to ekp-buffer-*.
2026-07-30 01:07:25 +08:00

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# Contributing to emacs-kp
Thanks for your interest. This document covers the essentials for
making a change that will pass review and CI.
## Development setup
```bash
EMACS=emacs # or /path/to/Emacs
# Byte-compile with warnings as errors (CI does this)
$EMACS -Q --batch -L . \
--eval '(setq byte-compile-error-on-warn t)' \
-f batch-byte-compile ekp.el ekp-utils.el ekp-hyphen.el ekp-buffer.el
# Run the ERT suite (C-module tests auto-skip if not built)
tests/run-tests.sh $EMACS
# Build the C module (required for the parity tests and fuzz)
make -C ekp_c PROFILE=portable
# Property fuzz: 300 random cases, asserts C and Elisp agree byte-for-byte
$EMACS -Q --batch -L . -l tests/ekp-fuzz.el
# Check release/CI/version invariants
tests/check-release.sh
# Check dictionary inventory and pinned upstream bytes
tests/check-dictionaries.sh
dictionaries/update.sh check
```
## Ground rules
- **The two engines must produce byte-identical output.** Any change
to the demerits or line-metric formulas must touch both
`ekp--dp-run-1d` (Elisp) and `dp_process_position` (`ekp_c/ekp_kp.c`),
and the fuzz suite must stay at 300/300.
- **The two renderers have different rights.** The string renderer's
physical marker vocabulary (`ekp-glue`, `ekp-soft-break`,
`ekp-soft-hyphen`, `ekp-hidden`) stays lossless and compatible. The
buffer renderer must create no overlay or source character and may use
only EKP-owned text properties on existing characters.
- Any C-module API change bumps `EKP_VERSION_MINOR` and the matching
`ekp-c-module-required-version`, and rebuilds the module.
- New behavior needs an ERT test. Buffer-level behavior (save,
isearch, undo, kill/yank, mode interactions) goes in
`tests/ekp-buffer-tests.el`.
## Style
- `lexical-binding: t` everywhere; keep byte-compilation warning-free.
- `checkdoc` clean (CI enforces it): imperative docstring first lines,
arguments mentioned in uppercase, two spaces after a sentence.
- `package-lint` clean: the `ekp-` / `ekp-buffer-` namespaces, proper
autoload cookies on interactive entry points.
- Match the surrounding code; keep comments about *why*, not *what*.
## Commits
Conventional Commits (`feat:`, `fix:`, `perf:`, `refactor!:`,
`docs:`, `test:`, `chore:`). Explain the reasoning in the body, not
just the change.
## Releases
Follow [Docs/RELEASING.md](Docs/RELEASING.md). In particular, action
dependencies stay pinned to full commit SHAs, released artifacts are
immutable, and every artifact gets a SHA-256 checksum.
## License
By contributing you agree that your contributions are licensed under
GPL-3.0-or-later, matching the project (see `COPYING`).