[Vm-dev] VM Maker: ImageFormat-dtl.29.mcz

[K K Subbu]

On Thursday 12 April 2018 12:19 AM, Eliot Miranda wrote:
> This is unreadable.  Either express it as a string or as a Slang
> program; anything but this horrid mashup of nextPutAll:s and C
> fragments :-(
>

The program itself is not needed. There is a file(1) utility to detect 
file types from file content based on pattern specs (aka magic file). 
Squeak can already generate this magic file (save in $HOME/.magic). E.g.

$ file --mime-type /opt/gits/oscogvm/image/*.image
/opt/gits/oscogvm/image/spurreader.image:  application/spur-image
/opt/gits/oscogvm/image/SpurVMMaker.image: application/spur-image
/opt/gits/oscogvm/image/trunk50.image:     application/spur-image
/opt/gits/oscogvm/image/trunk6.image:      application/spur-image

To add a launcher to the desktop menu, the following desktop spec
--- spur.desktop ---
[Desktop Entry]
Type=Application
Exec=cog %F
Name=Cog
GenericName=Squeak VM
Icon=cog
Terminal=false
Categories=Development;
MimeType=application/spur-image;application/cog-image;application/squeak-image;
-----

$ xdg-desktop-menu install --novendor spur.desktop

On my machine, I symlink cog to 
/opt/gits/oscogvm/image/sqlinux..../squeak and then I can open any image 
from file browser or from command line with:

$ xdg-open blahblah.image

HTH .. Subbu