Stop using result-inspect from Rust version 1.76 onwards

This is required to fix "cargo check" with Rust version 1.76+ (currently
in the beta channel) while still supporting older toolchain versions.

The `std::result::Result::inspect` method used to be a nightly-only
experimental API [0] but got stabilized in Rust version 1.76 [1] so we
don't need to depend on the `result-inspect` crate anymore (we could
make it optional but let's just wait until we bump the MSRV accordingly
and drop it entirely).

[0]: https://doc.rust-lang.org/1.74.0/std/result/enum.Result.html#method.inspect
[1]: https://doc.rust-lang.org/beta/std/result/enum.Result.html#method.inspect

Signed-off-by: Michael Weiss <michael.weiss@eviden.com>

Cargo.toml

@@ -58,6 +58,7 @@ reqwest        = { version = "0.11", features = [ "stream" ] }
 resiter        = "0.5"
 result-inspect = "0.3"
 rlimit         = "0.10"
+rustversion    = "1"
 semver         = { version = "1", features = [ "serde" ] }
 serde          = "1"
 serde_json     = "1"

src/endpoint/configured.rs

@@ -19,6 +19,7 @@ use anyhow::Error;
 use anyhow::Result;
 use futures::FutureExt;
 use getset::{CopyGetters, Getters};
+#[rustversion::before(1.76)]
 use result_inspect::ResultInspect;
 use shiplift::Container;
 use shiplift::Docker;

src/filestore/staging.rs

@@ -16,6 +16,7 @@ use anyhow::Error;
 use anyhow::Result;
 use futures::stream::Stream;
 use indicatif::ProgressBar;
+#[rustversion::before(1.76)]
 use result_inspect::ResultInspect;
 use tracing::trace;
 

src/main.rs

@@ -54,6 +54,9 @@ use anyhow::Error;
 use anyhow::Result;
 use aquamarine as _;
 use clap::ArgMatches;
+// TODO: Drop the rust-inspect dependency once we bump the MSRV to 1.76:
+#[rustversion::since(1.76)]
+use result_inspect as _;
 use tracing::{debug, error};
 
 mod cli;