Support array like string

[DataHearth]

Hello!

I've noticed an error when parsing a setup.cfg (you can find it here).
Outside of inline comments not supported (not a big deal), you raise an error when reading array like string: https://github.com/pypa/setuptools/blob/main/setup.cfg#L9 .

This would be great feature to add as many python projects use this kind of string.

Error: Error: 17:0 expecting "[Some('='), Some(':')]" but found EOF.

Thanks !

[zonyitoo]

It doesn't look like in INI format.

classifiers =
	Development Status :: 5 - Production/Stable
	Intended Audience :: Developers
	License :: OSI Approved :: MIT License
	Programming Language :: Python :: 3
	Programming Language :: Python :: 3 :: Only
	Topic :: Software Development :: Libraries :: Python Modules
	Topic :: System :: Archiving :: Packaging
	Topic :: System :: Systems Administration
	Topic :: Utilities

It looks like multi-line string in YAML.

Can Python parse it with configparser?

[DataHearth]

Setuptools and other libraries I've used don't seem to be bothered by this. This is a standard setup.cfg for python configuration file.
Many fields are using this method do achieve some sort or array with a multi-line string.

I just discovered that it wasn't really standard with ini format.

EDIT: yes, configparser does support it => https://docs.python.org/3/library/configparser.html#supported-ini-file-structure

[Multiline Values]
chorus: I'm a lumberjack, and I'm okay
    I sleep all night and I work all day

[zonyitoo]

Just read the code in configparser about multiline values. Those lines starts from the 2nd must begin with an "indentation", which is a special feature in configparser, because sections and keys can also have "indentation"s too.

I have also searched for how others ini parser support "multiline values", but seems that this is a specific feature in Python.

PRs are welcome, or I may try to implement it in weekends.

[DataHearth]

Unfortunately, I'm not that good with rust. I'm just beginning and I have no clue on how rust-ini works in details 😅. Can I let you do it when you're available and willing to ?

I edited the file and made a simple string line as a workaround.

[cnpryer]

Just wanted to share my interest for in multi-line parsing. I wasn't aware that this isn't an INI standard. Is this feature still on the table for rust-ini? Would be useful for astral-sh/rye#265.

[zonyitoo]

Currently not, because I don't know if there is any specification of "array like string" definition. Don't know what is the "correct" way to implement this feature.

[cnpryer]

My use case is effectively what configparser would do in this situation. So I was mainly referring to your clarification here #91 (comment).

I'm not sure if "array like string" is something different, but parsing new-line-delimited, indented values is what I'm in need of.

I'm surprised this isn't specified. I'll look into it more. Thanks for the quick response!