Do not call rustc for platform detection; use current_platform instead (#22)

* Do not call rustc for platform detection; use current_platform instead

* Drop unused imports

* Cargo.toml cosmetics

Author: Shnatsel

Cargo.toml

@@ -12,7 +12,9 @@ default = ["clap"]
 
 [dependencies]
 clap = { version = "3.1.6", optional = true, features = ["derive"] }
+current_platform = "0.2.0"
 dunce = "1.0.1"
 glob = "0.3.0"
 serde = { version = "1.0.123", features = ["derive"] }
 toml = "0.5.8"
+

src/subcommand.rs

@@ -4,9 +4,7 @@ use crate::error::{Error, Result};
 use crate::profile::Profile;
 use crate::{utils, LocalizedConfig};
 use std::ffi::OsStr;
-use std::io::BufRead;
 use std::path::{Path, PathBuf};
-use std::process::Command;
 
 #[derive(Debug)]
 pub struct Subcommand {
@@ -108,16 +106,7 @@ impl Subcommand {
         if artifacts.is_empty() {
             artifacts.push(Artifact::Root(package.clone()));
         }
-        let host_triple = Command::new("rustc")
-            .arg("-vV")
-            .output()
-            .map_err(|_| Error::RustcNotFound)?
-            .stdout
-            .lines()
-            .map(|l| l.unwrap())
-            .find(|l| l.starts_with("host: "))
-            .map(|l| l[6..].to_string())
-            .ok_or(Error::RustcNotFound)?;
+        let host_triple = current_platform::CURRENT_PLATFORM.to_owned();
         let profile = args.profile();
         Ok(Self {
             args,