Auto merge of #9968 - ehuss:verbose-version, r=alexcrichton,Eh2406

Add some more information to verbose version.

This adds a little bit of extra information to the verbose version command.

cc #6275 and #6161

Some examples of what it might look like:

```
cargo 1.57.0
release: 1.57.0
host: x86_64-unknown-linux-gnu
libgit2: 1.3.0 (sys:0.13.23 vendored)
libcurl: 7.79.1-DEV (sys:0.4.49+curl-7.79.1 vendored ssl:OpenSSL/1.1.1k)
ssl: OpenSSL 1.1.1k  25 Mar 2021
```

```
cargo 1.57.0
release: 1.57.0
host: x86_64-pc-windows-msvc
libgit2: 1.3.0 (sys:0.13.23 vendored)
libcurl: 7.79.1-DEV (sys:0.4.49+curl-7.79.1 vendored ssl:Schannel)
```

```
cargo 1.57.0
release: 1.57.0
host: x86_64-apple-darwin
libgit2: 1.3.0 (sys:0.13.23 vendored)
libcurl: 7.64.1 (sys:0.4.49+curl-7.79.1 system ssl:(SecureTransport) LibreSSL/2.8.3)
ssl: OpenSSL 1.1.1l  24 Aug 2021
```

Author: bors

.github/ISSUE_TEMPLATE/bug_report.md

@@ -22,7 +22,7 @@ labels: C-bug
 
 **Notes**
 
-Output of `cargo version`:
+Output of `cargo version --verbose`:
 
 <!-- Also, any additional context or information you feel may be relevant to the issue. -->
 <!-- (e.g rust version, OS platform/distribution/version, target toolchain(s), release channel.. -->

Cargo.toml

@@ -25,8 +25,8 @@ cargo-platform = { path = "crates/cargo-platform", version = "0.1.2" }
 cargo-util = { path = "crates/cargo-util", version = "0.1.1" }
 crates-io = { path = "crates/crates-io", version = "0.33.0" }
 crossbeam-utils = "0.8"
-curl = { version = "0.4.38", features = ["http2"] }
-curl-sys = "0.4.48"
+curl = { version = "0.4.39", features = ["http2"] }
+curl-sys = "0.4.49"
 env_logger = "0.9.0"
 pretty_env_logger = { version = "0.4", optional = true }
 anyhow = "1.0"
@@ -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"] }

build.rs

@@ -5,6 +5,10 @@ use std::path::Path;
 
 fn main() {
     compress_man();
+    println!(
+        "cargo:rustc-env=RUST_HOST_TARGET={}",
+        std::env::var("TARGET").unwrap()
+    );
 }
 
 fn compress_man() {

src/bin/cargo/cli.rs

@@ -4,6 +4,7 @@ use cargo::{self, drop_print, drop_println, CliResult, Config};
 use clap::{AppSettings, Arg, ArgMatches};
 use itertools::Itertools;
 use std::collections::HashMap;
+use std::fmt::Write;
 
 use super::commands;
 use super::list_commands;
@@ -173,10 +174,64 @@ pub fn get_version_string(is_verbose: bool) -> String {
                 version_string.push_str(&format!("commit-date: {}\n", ci.commit_date));
             }
         }
+        writeln!(version_string, "host: {}", env!("RUST_HOST_TARGET")).unwrap();
+        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
 }
 
+fn add_libgit2(version_string: &mut String) {
+    let git2_v = git2::Version::get();
+    let lib_v = git2_v.libgit2_version();
+    let vendored = if git2_v.vendored() {
+        format!("vendored")
+    } else {
+        format!("system")
+    };
+    writeln!(
+        version_string,
+        "libgit2: {}.{}.{} (sys:{} {})",
+        lib_v.0,
+        lib_v.1,
+        lib_v.2,
+        git2_v.crate_version(),
+        vendored
+    )
+    .unwrap();
+}
+
+fn add_curl(version_string: &mut String) {
+    let curl_v = curl::Version::get();
+    let vendored = if curl_v.vendored() {
+        format!("vendored")
+    } else {
+        format!("system")
+    };
+    writeln!(
+        version_string,
+        "libcurl: {} (sys:{} {} ssl:{})",
+        curl_v.version(),
+        curl_sys::rust_crate_version(),
+        vendored,
+        curl_v.ssl_version().unwrap_or("none")
+    )
+    .unwrap();
+}
+
+fn add_ssl(version_string: &mut String) {
+    #[cfg(feature = "openssl")]
+    {
+        writeln!(version_string, "ssl: {}", openssl::version::version()).unwrap();
+    }
+    #[cfg(not(feature = "openssl"))]
+    {
+        let _ = version_string; // Silence unused warning.
+    }
+}
+
 fn expand_aliases(
     config: &mut Config,
     args: ArgMatches<'static>,

tests/testsuite/version.rs

@@ -1,6 +1,6 @@
 //! Tests for displaying the cargo version.
 
-use cargo_test_support::project;
+use cargo_test_support::{cargo_process, project};
 
 #[cargo_test]
 fn simple() {
@@ -41,3 +41,15 @@ fn version_works_with_bad_target_dir() {
         .build();
     p.cargo("version").run();
 }
+
+#[cargo_test]
+fn verbose() {
+    // This is mainly to check that it doesn't explode.
+    cargo_process("-vV")
+        .with_stdout_contains(&format!("cargo {}", cargo::version()))
+        .with_stdout_contains("host: [..]")
+        .with_stdout_contains("libgit2: [..]")
+        .with_stdout_contains("libcurl: [..]")
+        .with_stdout_contains("os: [..]")
+        .run();
+}