Script to Auto CYGWIN -U all environment varialbes

Script to Auto CYGWIN -U all environment varialbes

[Gary Furash]

Has anyone written anything into their bash profile or whatever that goes
through each windows environment variable currently extant, and resets them
via CYGPATH

e.g.

Before, @ start of .bashrc
ETC=C:\WINDOWS\ETC

After run of .bashrc
ETC=`$(cygpath -u '$ETC')`; EXPORT ETC  (--> /cygpath/c/windows/etc)

Or something like that. So, by the time you hit your cygwin prompt all your
environment variables are already cleaned up.


Gary Furash | furashgary@gmail.com | 520-907-2470




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Re: Script to Auto CYGWIN -U all environment varialbes

[David Sastre]

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On Mon, Feb 07, 2011 at 03:36:26PM -0700, Gary Furash wrote:
> Has anyone written anything into their bash profile or whatever that goes
> through each windows environment variable currently extant, and resets them
> via CYGPATH
> 
> Before, @ start of .bashrc
> ETC=C:\WINDOWS\ETC
> 
> After run of .bashrc
> ETC=`$(cygpath -u '$ETC')`; EXPORT ETC  (--> /cygpath/c/windows/etc)
> 
> Or something like that. So, by the time you hit your cygwin prompt all your
> environment variables are already cleaned up.

I have seen the need to take windows paths conversion into account only
when dealing with Java apps from within cygwin: e.g. a tomcat
appserver, where the catalina.sh converts cygwin paths into windows
ones before sending them to the JVM, that doesn't understand them.
Other than that, I fail to understand what is the use for this. 
Could you please elaborate on a use case for such a configuration?
Also note that, following your example, you can still reach
/cygpath/c/windows/etc without converting anything.

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Re: Script to Auto CYGWIN -U all environment varialbes

[Andrew Schulman]

> Has anyone written anything into their bash profile or whatever that goes
> through each windows environment variable currently extant, and resets them
> via CYGPATH
> 
> e.g.
> 
> Before, @ start of .bashrc
> ETC=C:\WINDOWS\ETC
> 
> After run of .bashrc
> ETC=`$(cygpath -u '$ETC')`; EXPORT ETC  (--> /cygpath/c/windows/etc)
> 
> Or something like that. So, by the time you hit your cygwin prompt all your
> environment variables are already cleaned up.

Here's my solution.  Ugly quoting, but it works.

I chose to convert just a fixed list of environment variables that I know I
want to convert.  I guess it would be easy to cycle through all environment
variables and 'bashify' any that look like paths, i.e. any that have
backslashes in them.

    # Convert Win32-style paths to Cygwin-style
    function bashify {
        local p
        for p ; do
            if [ "${!p}" ] ; then
                eval 'export '$p'=$(cygpath -pu "$'$p'")'
            fi
        done
    }
    bashify MSDEV PROGRAMFILES WINDIR


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