- cross-posted to:
- python@programming.dev
- rust@programming.dev
- cross-posted to:
- python@programming.dev
- rust@programming.dev
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- Code:
- TOML spec:
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TOML is mainly for humans to write, certainly not a good choice if you’re programmatically writing files - comments and formatting would be lost.
It all depends on the library you use. Rust has you covered with toml_edit. It is what is used for all the cargo commands editing the Cargo.toml file.
Agreed. Except that it’s not easier to write imo
Where do you put your comments in JSON files?
That doesn’t really work when you need two comments at the same level, since they’d both have the same key
write json with comments. Use a yaml parser.
If you’re reaching for yaml, why not use toml?
because of the cut and paste problem. It works in json.
Cut and paste problem?
Every time i try to use toml, i end up going back to json
It still works since multiple identical keys are still valid json. Although that in itself isn’t fantastic imo.
For settings files I always have an example file with sensible values filled in and along with descriptive keys that serves as reasonable documentation. If something is truly unknowable, I’ve probably done something wrong.
How would you mark a flag in your json settings file as deprecated?
In my opinion, the settings file isn’t where this information should be presented. I would put these notes in the release log and readme and example settings file. I have also written this information to logging during startup so a user knows what to do, or I write a migration that does the change automatically if that’s possible.
This is only my opinion and you can use the comment method described like
“//“: “Deprecated”if desired.
The very first moment that I had to use JSON as a configuration format, and I was desperate to find a way to make a long string into a JSON field. JSON is great for many things, but it’s not good at all for a configuration format where you need users to make it pretty, and need features like comments or multi-line strings (because you don’t want to fix a merge conflict in a 400 character-wide line).
