Jacinda is a functional pattern filtering language, inspired by AWK.
There are binaries for some platforms on the releases page.
If you are on Mac, you will need to install *-librure.dylib as well.
Jacinda is available as a Nix package (thanks to Lukas Epple, who is the maintainer).
First, install Rust's regex library. You'll need to put librure.so or librure.dylib etc. in the appropriate place.
If you have cabal and GHC installed (perhaps via ghcup):
cabal install jacinda
There is a vim plugin and a VSCode extension.
Unix uses record separators in many places; we can display one entry in the
PATH variable with:
echo $PATH | ja -F: "{|[x+'\n'+y]|>\`$}"
Many Unix tools output information separated with spaces. We use regular expressions to match relevant lines and then select the field with the data itself, viz.
otool -l $(locate libpng.dylib) | ja '{`1 ~ /^name/}{`2}'
To get the value of a variable (say, PATH) from the output of printenv:
printenv | ja -F= '{%/^PATH/}{`2}'
See the guide (archived on Hackage), which contains a tutorial on some of the features as well as examples.
The manpages document the builtins and provide a syntax reference.
See the rosetta showing AWK alongside, or the examples for its own capabilities.
- No nested dfns
- No list literal syntax
- Postfix
:fand:iare handled poorly - Streams of functions don't work
- Higher-order functions are subtly broken
Intentionally missing features:
- No loops
- Rust's regular expressions
- extensively documented with Unicode support
- Deduplicate builtin
I have rewritten the code several times so forking and applying patches is fraught!
Bug reports are welcome contributions.