requires containing '~=' result in broken spec file

[M0ses]

In spec files ~= is not an valid operator to compare versions and I didn`t find anything about debian dsc-files

Here is a first draft how it could be fixed, but it would need more work

    for req in filtered_req_list:
        # Convert '~=' operator to something rpm understands
        # abc ~= 1.1.1 
        # should be converted into something like
        # python-abc >= 1.1.1, python-abc < 1.2
        # but not for build-requires 
        if req[1] == '~=':
            req[1]='>='
            v = req[2].split('.')
            v.pop()
            v[-1] = str(int(v[-1]) + 1)
            req.append(", %s < %s" % (req[0], ".".join(v)))
        out_list.append(req)

TODO:

1. Distinguish build_requires/install_requires
2. handle requirement output for dsc and spec different

I could help with the implementation.
I just wanted to start a discussion what the best way to handle it before starting the implementation.

[s-t-e-v-e-n-k]

Quoting https://www.debian.org/doc/debian-policy/ch-relationships.html:

The relations allowed are <<, <=, =, >= and >> for strictly earlier, earlier or equal, exactly equal, later or equal and strictly later, respectively. The exception is the Provides field, for which only = is allowed.

To answer your Debian .dsc files question

[M0ses]

@s-t-e-v-e-n-k I already seen it.
Do you know if something like the following would work in dsc?

Depends: python-abc (>= 1.1.1, < 1.2)
or
Depends: python-abc (>= 1.1.1 < 1.2)

[s-t-e-v-e-n-k]

Neither:

Depends: python-abc (>= 1.1.1), python-abc (< 1.2)

[M0ses]

@s-t-e-v-e-n-k
Thanks for clarification, this is how I implemented it in my first draft.
Just for the record:
I guess you meant
Depends: python-abc (>= 1.1.1), python-abc (<< 1.2)
(Sorry for my nitpicking)