Supporting reading the image from stdin

[JustSimplyKyle]

This is a weird request, but I wish it's possible to do something like this
cat wallpaper.png | swww img -
where - stands for read from standard input as most program do

[JustSimplyKyle]

The current workaround is to first save it to a temp file, load swww img, and then removes the temp file

[LGFae]

This should be pretty doable, actually. Though it will create a problem where swww query won't know the name of the image (since it uses the file's name for that). So it would answer something like: currently displaying "stdin". Would that be fine?

[JustSimplyKyle]

Perfectly fine!

[LGFae]

My apologies, I realized that this is actually harder than I initially thought. This is because what we send to the daemon is not the image file, but the image's filename. This means that, currently, in order to read a image, it needs to exist somewhere in the file system. I might be able to do something using temporary files, but, again, this is more complicated than what I had fist envisioned.

[LGFae]

Alright. The only limitation is that #62 will not animate any gifs you send in. I think I am going to keep it that way, since I don't really like the idea of piping giant gifs through stdin into the program.

[LGFae]

I decided to close like this for now, if anyone reading this would like to read animated gifs from stdin, please open another issue and I will get to it.

[JustSimplyKyle]

org-cat test.png | swww img -o HDMI-A-1 -(error msg Error: "Failed to serialize request: io error: Broken pipe (os error 32)")
Why would this fail?
org-cat test.png | imv -
This however works.

[LGFae]

it shouldn't, specially not with that error.
Thanks for testing this!

Re-openning.

[LGFae]

Now, we have a problem: I can't seem to be able to reproduce this...

Can you maybe give some more details? Do you literally just swww init and then try doing that?

[JustSimplyKyle]

Wait... I just forgot to restart swww after my upgrade. Sorry for the confusion!

[JustSimplyKyle]

this seem to be broken on the latest git.
org-cat /tmp/out.png | swww img - this doesn't work

[JustSimplyKyle]

This is the faulty commit. I wonder if it's possible to make these kind of stuff in tests.

[LGFae]

Ah yes, this is because we are trying to canonicalize all paths, but '-' is not a valid path, is it?

[LGFae]

I am fixing it; added a new test too to make sure it doesn't happen again

[JustSimplyKyle]

Thanks for the immediate fix!