erbish

Erbish

ERB In SHell

Installation

Install:

$ gem install erbish

Usage

Execute command with ERB notation.

$ erbish '<%= "data".succ.succ.succ.succ %>'
Thu Nov 13 21:09:10 JST 2014

Argument that start '%' is parsed as '<#{arg}%>'

$ erbish echo 5 + 4 = %=5+4
5 + 4 = 9

'%'ed argument can be start/end with '-' to join before/after args.

$ erbish echo B -%=42/10- U
B4U

$ erbish ruby -e 'p ARGV' "%3.times do |i|-" %=i -%end- 3
["0123"]

';' is interpreted as separator.

$ erbish "% 3.times do |i|" echo %=i \; %end
0
1
2

option '-d' is for debug. option '-p' is for just parse args, without execute.

$ erbish -d echo 1\; echo %=4**5
raw argv      : ["echo", "1;", "echo", "%=4**5"]
parsed argv   : ["echo", "1;", "echo", "<%=4**5%>"]
ERBed argv    : ["echo", "1;", "echo", "1024"]
result args   : [["echo", "1"], ["echo", "1024"]]
system        : ["echo", "1"]
1
system        : ["echo", "1024"]
1024

$ erbish -p echo 1\; echo %=4**5
echo 1
echo 1024

Alias and function might be helpful.

$ cat ~/.bashrc
...
alias es='erbish'
alias ee='erbish echo'
e () { while read f; do $f; done < <(erbish -p "$@"); }

$ ee '%= "".encoding'
ASCII-8BIT

$ e '%= "23".tr("0-9", "a-j")' /
$ pwd
/

Contributing

1. Fork it ( https://github.com/[my-github-username]/erbish/fork )
2. Create your feature branch (git checkout -b my-new-feature)
3. Commit your changes (git commit -am 'Add some feature')
4. Push to the branch (git push origin my-new-feature)
5. Create a new Pull Request