icr
ICR - Interactive Crystal
Interactive console for Crystal Programming Language.
Usage
It's like irb, but for Crystal:
Require local files
You can require local files by relative path (starts with ./
):
require "./src/my_cool_lib"
Installation
Prerequisites:
- It requires crystal to be already installed.
- Readline (for Debian/Ubuntu install
libreadline6-dev
package).
Clone the repo:
git clone https://github.com/greyblake/crystal-icr.git
Switch to repo-directory:
cd crystal-icr
Build:
make
And create symlink of ./bin/icr
in to direcotory that is listed in your $PATH
, e.g.:
sudo ln -s $(realpath ./bin/icr) /usr/bin/icr
(it's necessary only for the first time)
Enjoy!)
Arch Linux
Arch Linux users can install ICR from AUR.
How does it work?
- Every time you press
Enter
it adds new instruction, generates new crystal program and executes it. - The output is split into 2 parts: regular program output (e.g. output from
puts 10
) and value returned by the last command - The regular output is saved, and when you type a new instruction, new program is generated. The saved output is subtracted from the new output, and the difference is printed out. It makes an illusion that only new instructions are executed :)
Development
To run tests:
make test
Contributors
- greyblake Potapov Sergey - creator, maintainer