Create a custom ES system able to launch games for many systems

lilbud

@meleu That guy reminds me of my old science teacher, He'd be hyper at 7:45 in the morning, same with my bowling coach:

Teammate: How many Coffees do you drink a day?
Coach: 6
Teammate: 6 COFFEES!?
Coach: Listen, My wife is pregnant and I have a 3 year old, I don't sleep

meleu

@lilbud said in Create a custom ES system able to launch games for many systems:

Teammate: How many Coffees do you drink a day?
Coach: 6
Teammate: 6 COFFEES!?

I think when I'm working the night shift I hydrate myself with coffee. :-)

It surely is more than 6.

Coach: Listen, My wife is pregnant and I have a 3 year old, I don't sleep

And it seems that this tends to get worse.

spruce_m00se

@UDb23 im thinking of making a blue and black striped theme for a cabinet. I like the stripes on the cabinet in the daft punk song derezzed. if only they showed the whole thing.!

UDb23

@spruce_m00se Didn't know that Tron music was made by them. Thanks for the info.
And yes, unfortunately the video does not show the entire cab.

spruce_m00se

@UDb23 yeh, thats why they were in the film, it was reported at the time that they would only do the soundtrack in return for a cameo.

i love the tron legacy soundtrack, its great,

the cabinet looks great from what you see in the video right ?

cyperghost

@meleu
I planed something similar and wanted to write a program called little favourite launcher - but as always.... There is no time :(

It uses not symbolic links but description files.
So you create a file like Tetris (GB).fav
The file contains two lines

ROM fullpath
runcommand

For example
ROM location: ~/RetroPie/roms/GB/Tetris (JUE) (V1.1) [!].gb
runcommand: /opt/retropie/supplementary/runcommand/runcommand.sh 0 _SYS_ gb

The little launcher reads out those two lines and excutes the runcommand in addition with ROM path. and Execute: /opt/retropie/supplementary/runcommand/runcommand.sh 0 _SYS_ gb ~/RetroPie/roms/GB/Tetris (JUE) (V1.1) [!].gb. That's just a 6 to 8 liner in any language you want.
The big advantage is that you don't have to mess around with symlinks. To create the FAV files you can use any frontend you want.

Changes that must be done to es_launcher.cfg

    <fullname>Favorites</fullname>
    <path>/home/pi/RetroPie/roms/favorites</path>
    <extension>.fav .FAV</extension>
    <command>.lilfavlaunch %ROM%</command>
    <platform>all</platform>
    <theme>Favorites</theme>
  </system>

meleu

@cyperghost pretty cool idea too. But one thing I can anticipate is that it won't be possible to scrape in the traditional ways.

cyperghost

Ah... You're right!
Well, I never scrape :)
I would suggest it as small workaround for a favorite folder

meleu

@cyperghost if you were about to write a program to create those files, your program could also get the game's metadata info from the respective gamelist.xml and dump it in favorites/gamelist.xml. ;-)

pjft

Sorry, this has been a bit hard to follow, I probably should know the answer here and it was likely answered before, but couldn't we just create a gamelist file that points to relative paths in other folders and achieve the same thing without the symbolic links?

meleu

@pjft perfectly doable, but the problems would be:

the users would need to edit konami/gamelist.xml manually, (less practical than ln -s target symlink).
the script to launch the game would be a little more complex (get the actual system from the xml file).
the use of gamelist.xml would be mandatory, not an option.

I'll add this question to the FAQ.

pjft

@meleu Got it, thank you.

Just wanted to check if I was missing something from the overall picture, but it was mostly curiosity and feasibility for non-Linux file tables (i.e. those who run their ROMs from a FAT32 USB drive like me).

Well done!

Hope your boy has fully recovered by now :)

cyperghost

@meleu There is a difference in creating config files like a database or to create some filepieces to call some files. But here it is ... A pity I can't call other bash files.
I think it caused while a user (pi) calls user with privleges. It can run easy bash files and other binaries but this makes no sense so far :(

It's compiled on a raspberry 1 .... but due compatibilty it can run on the pi 2/3
Make it executable via chmod +x

Usage: create any file you want (maybe testfile.test)
First line contains parameters
Second contains binary or bash

run
./lfl testfile.test

output is:
first line of testfile
second line of testfile
Execute firstline+secondline

EDIT:
Can't upload... well this small binary isn't usefull anyway :)

meleu

@pjft said in Create a custom ES system able to launch games for many systems:

feasibility for non-Linux file tables (i.e. those who run their ROMs from a FAT32 USB drive like me)

The symbolic links must be in a Linux partition, but the target file can be in any valid path. As a FAT32 partition is mounted in a valid path, I think the method works fine for those people. :-)

The boy is recovering well! :-)

pjft

@meleu said in Create a custom ES system able to launch games for many systems:

The symbolic links must be in a Linux partition, but the target file can be in any valid path. As a FAT32 partition is mounted in a valid path, I think the method works fine for those people. :-)

I think I get that, but if the whole ROM folder and subfolders are in a FAT32 partition, there's no way to add symlinks in a Linux partition for this purpose (i.e. all the roms are expected to be in that folder anyway), or am I missing something?

Or would you suggest in the es_systems.cfgfile to add a <path> pointing to a folder in the SD card? Is that what you'd be recommending?

Thanks!

cyperghost

@pjft That should work
Create a folder to /home/pi/RetroPie/symlinks and point from FAT32-ROM to that folder
Change es_systems.cfgfolder path to /home/pi/RetroPie/symlinks

meleu

@pjft yep! @cyperghost answered well.

Also, I've just updated the question 3 of the FAQ:

3. Is it possible to create symbolic links on a Windows machine and move them to my RetroPie later?

No. Symbolic links can't be created on Windows and can't be placed on a Windows partition.

But if your ROMs are stored on a Windows partition, you can use the method described here. You just have to place the symbolic links themselves on a Linux partition (target files can be in any valid path). Click here to see the conversation about it.

Howitzer99

Excellent work, thanks for posting, will give this a go over the weekend!

meleu

Changelog:

Small update in the runcustom.sh. I've just discovered the readlink command, no need to pipe ls output to sed in order to get the target file name.

cyperghost

@meleu
So work done - I created a litlle unix binary for a fav launcher in a new thread