Cicada Unix Shell
Cicada is a simple Unix shell written in Rust.
Documents
- Environment Variables
- Built-in Commands
- Completion
- RC File
- History
- Job Control
- Customize Prompt
- Scripting
Try out cicada with Docker
$ docker pull mitnk/cicada
$ docker run --rm -it mitnk/cicada
(in-cicada) $ cinfo
Features
Run programs and pipelines
$ ls | head -n3
Desktop
Documents
Downloads
$ echo foo bar | awk -F " " '{print $2, $1}'
bar foo
With redirections
$ ls file-not-exist 2>&1 | wc > e.txt
$ cat e.txt
1 7 46
Command substitution
$ ls -l `which sh`
-r-xr-xr-x 1 root wheel 618512 Oct 26 2017 /bin/sh
$ echo "Time is $(date)."
Time is Sun Sep 2 12:04:13 CST 2018.
Run multiple commands (with logical)
$ echo foo; echo bar
foo
bar
$ echo foo && echo bar
foo
bar
$ echo foo || echo bar
foo
Shell expansions
$ echo sp{el,il,al}l
spell spill spall
$ echo $SHELL
/usr/local/bin/cicada
$ echo *
Cargo.lock Cargo.toml LICENSE Makefile README.md src target
Math arithmetic directly in the shell!
$ 1 + 2 * 3 - 4
3
$ (1 + 2) * (3 - 4) / 8.0
-0.375
$ 2 ^ 31
2147483648
Install Cicada
Please refer to docs/install.md.
Cicada is also a library (BETA)
Read APIs here: https://docs.rs/cicada/.
FAQs
- Why another shell?
- Compare to bash?
- When will functions get supported in cicada?
- Is cicada POSIX-compatible?
- Will my bash/zsh scripts continue work in cicada?
- Windows support?
To Do List
- to support simple Functions