cosh is a small ruby utility that generates a shell environment & alias configuration for multiple shells that don't share a common syntax.

It currently supports the following families:

• the POSIXy family: sh bash ash dash ksh zsh
• csh family: csh tcsh
• fish family: fish

• ruby 2.2 (probably works with 2.0+)
• any of the supported shells

Add something like the following to your shell's startup script (bashrc, cshrc, config.fish):

# sh-like
# NOTE: sourcing a process-substitution may not work on other sh-like shells
# and will not work on old versions of bash
source <( cosh --shell bash ~/.config/cosh/config.rb )

# csh-like
set rc=/tmp/cshrc-`date +s`
cosh --shell csh ~/.config/cosh/config.rb >${rc} && source ${rc} && rm ${rc}

# fish
source ( cosh --shell fish ~/.config/cosh/config.rb | psub )

It's recommended that you use the actual shell name, since that lets you do some fancy conditionals in the config.

config.rb is a standard ruby file that gets evaled by cosh. Any standard ruby should work in it, and there's a basic DSL for common operations.

Example:

• var foo, 'bar' sets an exported variable foo to bar
• lvar bar, 'baz' sets a local variable bar to baz
• alias foo, 'bar' creates an alias named foo, which will run bar when run

Refer to config.sample.rb for more details.