save & load config fail in combination with sidecar-template

[Syntaxheld]

Describe the bug
When using the --sidecar-template option and saving the command to a TOML config file, osxphotos crashes when loading that config file.

To Reproduce
Steps to reproduce the behavior:

1. osxphotos export --directory "{created}{moment?{comma} {moment},}" --album export-test --sidecar-template custom_sidecar_json.mako "{filepath}.json" write_skipped,strip_lines --edited-suffix "-edit" --save-config CONFIG.toml --config-only DIR
2. osxphotos export --load-config CONFIG.toml DIR
3. Something went wrong and osxphotos encountered an error: list index out of range

Expected behavior
Export command using the config file should work just as well as the one without.

Desktop (please complete the following information):

• OS: macOS Sequoia Beta 15.1 (24B5070a)
• osxphotos version: osxphotos, version 0.68.6
  Python 3.12.7 (main, Oct 1 2024, 02:05:46) [Clang 16.0.0 (clang-1600.0.26.3)]
  macOS 15.1.0, arm64

Additional context
If you comment out the sidecar_template line in the toml file (and specify the option on the CLI), it works.

Crashlog attached.
osxphotos_crash.log

[Syntaxheld]

and the generated config file from the first reproduction step:
CONFIG.toml.zip

[RhetTbull]

Weird...I'm using the same TOML library to write the config file as I am to read it. I'll take a look to see if I can figure out what is going on.

[Syntaxheld]

I have run the file through https://www.toml-lint.com/ ... and it says it's valid. 🤷🏻
So maybe it is an issue in combination with the option parsing?

[RhetTbull]

This appears to be a known bug in the toml library used by OSXPhotos. I've confirmed that both tomli and the built in tomllib (which is only available in python 3.11+) do not have this problem and correctly parse the toml file.

I will update the toml code in OSXPhotos to use tomli. In the next release I'll be dropping support for Python 3.9 and adding support for Python 3.13. Once I get to Python 3.11 as the minimum I can then use the built in toml library.

In the meantime you can pass the --sidecar-template option directly on the command line instead of via the config file.

[RhetTbull]

@all-contributors please add @Syntaxheld for bug

[allcontributors]

@RhetTbull

I've put up a pull request to add @Syntaxheld! 🎉