Bootstrap version fails to read implicit dependencies table

[awvwgk]

This could be an upstream issue with https://github.com/kowainik/tomland, but I don't know enough Haskell to verify this.

Steps to reproduce:

1. Install the bootstrap version of fpm (fcb7f67 used)
2. Create new project and add any dependency without using an inline table

> fpm new example
> cd example
> echo "[dependencies.toml-f]\ngit = \"https://github.com/awvwgk/toml-f\"" >> fpm.toml

3. Try to build the project with the dependency

> fpm build
# gfortran (for build/gfortran_debug/example/example.o build/gfortran_debug/example/example.mod)
# ar (for build/gfortran_debug/example/libexample.a)
ar: creating build/gfortran_debug/example/libexample.a

4. Find the dependency not recognized

> tree build
build
└── gfortran_debug
    └── example
        ├── example.mod
        ├── example.o
        └── libexample.a

Presumed source of the error:

The following two TOML documents are equivalent, except

1. uses an inline table for dependencies.toml-f

[dependencies]
toml-f = { git = "https://github.com/awvwgk/toml-f" }

2. dependencies is implicitly created

[dependencies.toml-f]
git = "https://github.com/awvwgk/toml-f"

Apparently, implicit tables are handled differently by the tomland parser, but this implementation detail should not leak into fpm

Additional information:

Testing this with the Python toml module:

>>> import toml
>>> table = toml.loads("[dependencies.toml-f]\ngit = \"https://github.com/awvwgk/toml-f\"")
>>> print(table)
{'dependencies': {'toml-f': {'git': 'https://github.com/awvwgk/toml-f'}}}
>>> print(toml.dumps(table))
[dependencies.toml-f]
git = "https://github.com/awvwgk/toml-f"

[everythingfunctional]

I hadn't expected anybody to try using implicit tables for that, but I can confirm there is likely a bug in the upstream library with that style.

I believe the way it stores the "key path" when parsing the toml can end up slightly different depending on that style. I had to implement a feature to allow it to do the automatic conversion to the types used by fpm properly with a table like that, and it's possible it's not properly dealing with that different "key path" style.

I'll submit a bug report for that library. I'm not sure if that will be fixed before the Fortran version is done or not. We'll see.

[everythingfunctional]

ok, can confirm that the bug exists in the latest version of the library as well. Going to work on a bug report to them.

[awvwgk]

ok, can confirm that the bug exists in the latest version of the library as well. Going to work on a bug report to them.

Thanks.

I hadn't expected anybody to try using implicit tables for that, but I can confirm there is likely a bug in the upstream library with that style.

I think it is kind of a natural choice for this, as inline tables are quite limited by the TOML specs on purpose.
Especially another kind of implicit tables is really expressive in this context:

[dependencies]
toml-f.git = "https://github.com/toml-f/toml-f"