error: failed to select a version for hidapi.

[ndcroos]

Problem

I am trying to add the crate 'hidapi' to my project, but I have a dependency issue. I don't know how to resolve this.

When I execute cargo build, I get the following:

$ cargo build
    Updating crates.io index
error: failed to select a version for `hidapi`.
    ... required by package `ledger-transport-hid v0.8.0`
    ... which is depended on by `ledger-transport v0.8.0`
    ... which is depended on by `test-ledger-rs v0.1.0 (/home/nick-test/test-ledger-rs2)`
versions that meet the requirements `^1.2.3` are: 1.2.5, 1.2.3

the package `hidapi` links to the native library `hidapi`, but it conflicts with a previous package which links to `hidapi` as well:
package `hidapi v0.5.2`
    ... which is depended on by `ledger v0.2.5`
    ... which is depended on by `test-ledger-rs v0.1.0 (/home/nick-test/test-ledger-rs2)`

When I change the hidapi versio, the error remains.

Steps

1. Add the following to the Cargo.toml file:

ledger = "0.2.5"
ledger-transport-hid = "0.8.0"
ledger-apdu = "0.8.0"
ledger-transport = "0.8.0"
hidapi = "0.5.2"

2. Execute cargo build

3. Eventually, change hidapi to other versions that meet the requirements.

Notes

Output of cargo version: cargo 1.49.0 (d00d64d 2020-12-05)

I am working on Debian 10.

[Eh2406]

Indeed they are not compatible.
ledger depends on = 0.5.2 of hidapi and
ledger-transport-hid depends on ^1.2.3 of hidapi.
So you will need to find versions that are intended to work together. It looks like there is no version of ledger-transport-hid without that requirement, so as someone that dose not know the libraries, I don't know what to advice.

[ehuss]

Leaving open to perhaps extend the error message with a little more information. I'm thinking a note after the error that maybe says something like the following:

Only one package in the dependency graph may specify the same links value. This helps ensure that only one copy of a native library is linked in the final binary. Try to adjust your dependencies so that only one package uses the links = 'hidapi' value. For more information, see https://doc.rust-lang.org/cargo/reference/resolver.html#links.