Specify both an upper and a lower bound in Project.toml?

How do you specify numeric values for both an upper and a lower bound for a package in Project.toml?

In particular, I would like to specify that a package is compatible with 1.90 ≤ PyCall < 2. My first thought was

PyCall = "≥ 1.90, < 2"

but the Project.toml documentation states that it takes the union of comma-separated values, whereas I want the intersection.

Nowadays the registry requires an upper bound for merging updates, and I don’t want to manually specify a list of minor versions like "1.90, 1.91, 1.92, …".

The source code seems to indicate that this is impossible, even though the underlying VersionRange type seems to support it. :frowning_face:

It looks like hyphenated ranges were added in Julia 1.4, but this looks like an inclusive range, where I want < 2 rather than ≤ 2

I filed an issue: support specifying both lower and upper compatibility bounds · Issue #1748 · JuliaLang/Pkg.jl · GitHub

I thought this was what the caret did?

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Oh duh, ^1.90 (or 1.90, since ^ is the default) according to the semver spec means exactly 1.90 ≤ version < 2.

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