Question

I want to initialize my Cygwin environment with a variable coming from a batch file

@set myvar=test
%BASH% --login -c "set"
REM hope to see myvar

So I want myvar with its value eventually be available in bash.

Answer 1

You can have the batch file append your variable to your bash.bashrc file to create bash environmental variables, like so:

export croot=/cygdrive/c

Then you access that croot variable like so

export cc=$croot/CC

or

alias cdcc='cd $croot/CC'

The path on my machine is C:\cygwin\etc\bash.bashrc … yours may differ.

Note that the variable won’t be available in running cygwin sessions, only new ones.