add darktile support

[SirCipherz]

i added support for https://github.com/liamg/darktile

[hackerb9]

What is dark tile?

Why does it write to a file named "code"?
I'd there a simpler way to test for "darktile"?

[hackerb9]

I appreciate your work, but I cannot accept this merge request.

If darktile is a sixel compatible terminal emulator, then it should respond with a '4' when lsix asks if it supports sixels.

Also, while ps works for an individual user, it should not be necessary for every user of lsix to fork an external command each time lsix is run just to detect sixel support. If darktile has technical limitations in how it responds, as yaft did, then we would support it using the same method: by checking the TERM environment variable.

[hackerb9]

Would you be willing to file a bug report with the darktile project to let them know it is not working with lsix? Thanks!

[SirCipherz]

thanks for your review hackerb9, i removed the creation of the code file which only was a debug file, the method the project is currently using for yaft doesn't work because the TERM variable for darktile is xterm-256colors, the method i'm using is the best i found yet.

[hackerb9]

thanks for your review hackerb9, i removed the creation of the code file which only was a debug file, the method the project is currently using for yaft doesn't work because the TERM variable for darktile is xterm-256colors, the method i'm using is the best i found yet.

Unfortunately, it seems like this is something the authors of darktile will have to address. Have you filed a bug report with that project? If not, please do so so that programs like lsix can automatically detect that darktile has sixel support.

In the meantime, here is an ugly environment variable kludge based on your method that may help you. You can add it to your login script (e.g., .bash_profile):

if [[ "$(ps -o comm= -p "$(($(ps -o ppid= -p "$(($(ps -o sid= -p "$$")))")))")" == darktile ]]; then
   export LSIX_FORCE_SIXEL_SUPPORT=yuck
fi

It's not the right solution, but you can try it if you don't get any response from the darktile developers.