Am 21.01.2020 um 01:58 schrieb Lavrentiev, Anton (NIH/NLM/NCBI) [C] via 
cygwin:
> Hi List,
> 
> I have a question, is there a way to clone-install Cygwin?
> 
> Like I have installed whatever packages I selected on some PC, then maintained that installation for a while,
> doing upgrades etc.  Now I need to install the exact same set on another PC.  Can I pull up a list and use it
> in a sort of a batch install with setup.exe?  I want to avoid to dumb-copy the entire C:\cygwin tree from one PC to another,
> rather use a semi-automatic install procedure from scratch, if possible, using the list of packages that I need.
> 
> Thanks for all the insights you can provide.
> 
> Cheers,
> Anton
> 

attached my solution to re-install or duplicate the packages of an 
existing installation.


$ ./cyg-reinstall.sh
Usage :  cyg-reinstall.sh [ -A | -I | -f filelist ]
   create cyg-reinstall-{ARC}.bat from
   options
     -A  :  All packages as reported by cygcheck
     -I  :  incomplete packages as reported by cygcheck
     -f  :  packages in filelist (one per row)

$ ./cyg-reinstall.sh -A

and the batch file is ready

$ ls -s cyg-reinstall-x86_64.bat
32K cyg-reinstall-x86_64.bat

$ head -c 100 cyg-reinstall-x86_64.bat
setup-x86_64.exe   -P 
_autorebase,_autorebase,_update-info-dir,a2ps,adobe-source-code-pro-fonts,adob

Regards
Marco