rustc_tools_util: try to handle case of not having CFG_RELEASE_CHANNEL better when getting compiler channel.

[matthiaskrgr]

changelog: rustc_tools_util: try to handle case of not having CFG_RELEASE_CHANNEL better when getting compiler channel.

[matthiaskrgr]

I'll do a version bump and a new crates io release soon I think

[matthiaskrgr]

EDIT: fixed

     Running `/Users/travis/build/rust-lang/rust-clippy/target/debug/clippy_dev update_lints --check`
+++cargo +nightly fmt --all -- --check
Diff in /Users/travis/build/rust-lang/rust-clippy/rustc_tools_util/src/lib.rs at line 79:
     }
 }
 
-
 pub fn get_commit_hash() -> Option<String> {
     std::process::Command::new("git")
         .args(&["rev-parse", "--short", "HEAD"])

will fix later

[phansch]

Does this fix a specific bug somewhere? From reading the code it looks like it was showing nightly where it should have shown beta or stable in the version output?

In any case, this looks like an improvement, so
@bors r+

[bors]

📌 Commit 8012b91 has been approved by phansch

[phansch]

@bors r- Let's wait until #4047 is merged before pushing things onto the bors queue

[phansch]

@bors r+

[bors]

📌 Commit 8012b91 has been approved by phansch

[bors]

⌛ Testing commit 8012b91 with merge 86f7347...

[bors]

☀️ Test successful - checks-travis, status-appveyor
Approved by: phansch
Pushing 86f7347 to master...