Add os to verbose version string.

Author: ehuss

Cargo.toml

@@ -48,6 +48,7 @@ libgit2-sys = "0.12.24"
 memchr = "2.1.3"
 num_cpus = "1.0"
 opener = "0.5"
+os_info = "3.0.7"
 percent-encoding = "2.0"
 rustfix = "0.6.0"
 semver = { version = "1.0.3", features = ["serde"] }

src/bin/cargo/cli.rs

@@ -178,6 +178,7 @@ pub fn get_version_string(is_verbose: bool) -> String {
         add_libgit2(&mut version_string);
         add_curl(&mut version_string);
         add_ssl(&mut version_string);
+        writeln!(version_string, "os: {}", os_info::get()).unwrap();
     }
     version_string
 }

tests/testsuite/version.rs

@@ -50,5 +50,6 @@ fn verbose() {
         .with_stdout_contains("host: [..]")
         .with_stdout_contains("libgit2: [..]")
         .with_stdout_contains("libcurl: [..]")
+        .with_stdout_contains("os: [..]")
         .run();
 }