v2.0.0 - Rust Rewrite

pk 2.0.0

Complete rewrite in Rust, replacing the C codebase and autotools build system.

What's new

• Drop-in replacement — identical CLI interface and behavior
• 2–3x faster thanks to buffered I/O
• Simpler builds — just cargo build --release, no autotools/argp dependencies
• Includes all bug fixes from v1.1.0

Install

cargo install --git https://github.com/johnmorrow/pk

Or download a prebuilt binary below:

Platform	Binary
Linux x86_64	pk-linux-amd64
macOS arm64	pk-macos-arm64

pk 1.1.0 — Bug fixes and documentation updates

What's Changed

Bug Fixes

• Fix segfault when combining -e (empty fields) with -b, -T, or -E and trailing/leading delimiters (#9)
• Fix crash when field index 0 is used — now treated as a literal string (#10)
• Fix reversed ranges like 4..2 silently producing empty output — now normalized to 2..4 (#11)
• Fix memory leak when -d flag overrides default delimiters (#12)
• Fix memory leak when -E flag overrides PK_EXCLUDES environment variable (#13)
• Fix integer overflow in field number parsing — huge numbers no longer silently wrap (#14)

Documentation

• Fixed range syntax in manpage: was documenting - but code uses ..
• Added missing -q/--quotes flag to OPTIONS section in manpage
• Added CLAUDE.md with build instructions and architecture overview
• Added badges to README

Tests

• Added 7 new test cases covering all fixed bugs (48 total, up from 41)

Install

Download pk-1.1.0.tar.gz below, then:

tar xzf pk-1.1.0.tar.gz
cd pk-1.1.0
./configure && make && sudo make install

On macOS, install dependencies first: brew install argp-standalone and pass CFLAGS="-I/opt/homebrew/include" LDFLAGS="-L/opt/homebrew/lib" to configure.

Include tests in tarball

• Tests now included in dist tarball for "make test"
• Test script now runs on Mac OS X

Range bug fix and Mac OS X fix

• Fixed bugs parsing some ranges.
• Added getline implementation using fgetln to hopefully fix Mac OS X 10.6.8 compilation.

pk - Initial release

pk is a command line utility for easily extracting columns from text.

Initial version supports:

• variable delimiters
• fixed file formats
• CSV
• quoted fields
• escaped delimiters