shell scripting topic

[meleu]

@lilbud it's possible. But you have to specify where do you want to apply the overlay (specific for a game? specific for a system?).

Expand the use case.

[cyperghost]

@lilbud Yes please - I can't imagine what you exactly want.
I think it can be wrapped up like here

[lilbud]

@meleu The script would apply the overlay to all systems automatically. Individual systems can be modified when launching a game from the system where the user doesn't want an overlay, like GB/GBC/GBA or other hand held systems were aspect ratio is not 4:3

@cyperghost Something like that would be nice for this, having the script and be able to choose which systems you want the overlay to be applied to.

[cyperghost]

@lilbud automatically means to invoke runcommand-onstart.sh
I think it's doable but we need more input about usecase...

I think there is a need of 2 parts....

1. Part let you choose overlay for special system
2. Invokes seleceted overlay to system on start of emulator run

I think.... you should start coding. And we will help you ;)
You can read the full thread I've posted ... The issue here was solved in an efficient way (imho)

[meleu]

@lilbud said in shell scripting topic:

@meleu The script would apply the overlay to all systems automatically.

I'm not sure if an overlay for all systems would look good. I think some systems have a different aspect ratio.

As @cyperghost said, we can help you once you start the coding. But maybe the fastest solution is to use rpie-art tool. Learning how to create an info.txt file is faster than learning a programing language.

Here is the info.txt creation doc: https://github.com/meleu/rpie-art/blob/master/INFO.md

[cyperghost]

@meleu Yes... therefore the runcommand-onstart. $1 shows current used system. So there is a way to set an overlay for a specfic system ... ;)

[lilbud]

@meleu @cyperghost I had this to start with:
sed -i 's/01.png/08.png/g' overlay.cfg

Something feels missing, not sure what at the moment.

[meleu]

@lilbud where is placed the script with that line of code? maybe you have to use the full path to the overlay.cfg.

[lilbud]

@meleu I believe it is placed in the overlay directory.

opt/retropie/configs/all/retroarch/overlay

[cyperghost]

@lilbud Just start coding use echo commands to show results in your bash
You can test sedcommands directly from CLI and results will be marked red.
Don't use -i parameter for testing... it will directly write to input file and may give unwantend results. If you want create altered files then work with direction > output-file first.

If all works then use -i

[lilbud]

@cyperghost Ok, I can get the original command to replace the text, but only if both fields are specified.

sed -i 's/01.png/08.png/g' overlay.cfg

This works fine, 01.png is replaced with 08.png. But what would I put in the first field if the overlay name is not 01.png. Something like this?:

sed -i 's/${FILENAME}.png/08.png/g' overlay.cfg

[mitu]

@lilbud You can use a wildcard:

sed -i 's/.*.png/08.png/g' overlay.cfg

Note that this will replace any <filename>.png in the file with 08.png.

[cyperghost]

@lilbud I'm still not sure what your goal is.
Anwer yourself:

1. Where is the overlay.cfg located?
2. In which case do you want to alter overlays?
3. Is there a "system" in altering names (Maybe $EMU-$ROMNAME-$TAG.png?)

Imho ... here's is a good script that writes several information in /boot/config.txt and checks existance of data before.

For graphics menu layout you can use this it uses arrays for graphics menu and here is a Howto for dialog/whiptail usage.

Here is the RetroPie wiki and how to input paramters into your script.

[lilbud]

@cyperghost okay

• Overlay.cfg located in default directory, /opt/retrofit/configs/all/retroarch/overlay

• The point of the script is to provide a way a to switch and choose the overlay from the retropie menu in ES.

• So choosing overlay named, '08.png, will do a few things. It will check for an overlay in use. If one is found, then the cfg file will be modified to show the path of the wanted overlay.png, (/my/awesome/overlay/8.png).

• Once the overlay is selected, the main retroarch.cfg will be modified with the viewport settings and the overlay.

Anything else needing further explanation?

[cyperghost]

@lilbud No I understood.
All the links I've provided to you will help you to code this.
Just start over with the selection menu ;)

[lilbud]

@cyperghost If I can find a way to get the script done during class, I'll see if I can work on it.

I think there is bash on my school computer...

[cyperghost]

@lilbud
Bash? School computer?

Code on your Pie!
All you need is a SSH terminal and nanoas editor

So you I would do the following.

1. You write a selection menu that provides a layout for selected system and save it to config
2. You write an "enabler" that sets overlay according to choosen system

;)

[lilbud]

@cyperghost I don't have access to my pi in school, besides, the schools network is locked to any device that isn't a school issued computer.

[meleu]

@cyperghost said in shell scripting topic:

For graphics menu layout you can use this

I'm afraid that a scriptmodule isn't a good example for starters ;-)

@lilbud said in shell scripting topic:

Anything else needing further explanation?

Yes, post your code in ghostbin or something so we can give more effective guidance.

[lilbud]

@meleu I'll have to redo it today, I'll post a link later.