Merge #371

371: [wip] #370 Support for explicit channel argument r=reitermarkus a=anti-social

Need a little time to write some tests (never dealt with azure).

Co-authored-by: Alexander Koval <[email protected]>

Author: bors[bot]

src/cli.rs

@@ -5,15 +5,18 @@ use crate::cargo::Subcommand;
 use crate::rustc::TargetList;
 use crate::Target;
 
+#[derive(Debug)]
 pub struct Args {
     pub all: Vec<String>,
     pub subcommand: Option<Subcommand>,
+    pub channel: Option<String>,
     pub target: Option<Target>,
     pub target_dir: Option<PathBuf>,
     pub docker_in_docker: bool,
 }
 
 pub fn parse(target_list: &TargetList) -> Args {
+    let mut channel = None;
     let mut target = None;
     let mut target_dir = None;
     let mut sc = None;
@@ -22,7 +25,9 @@ pub fn parse(target_list: &TargetList) -> Args {
     {
         let mut args = env::args().skip(1);
         while let Some(arg) = args.next() {
-            if arg == "--target" {
+            if let ("+", ch) = arg.split_at(1) {
+                channel = Some(ch.to_string());
+            } else if arg == "--target" {
                 all.push(arg);
                 if let Some(t) = args.next() {
                     target = Some(Target::from(&t, target_list));
@@ -62,6 +67,7 @@ pub fn parse(target_list: &TargetList) -> Args {
     Args {
         all,
         subcommand: sc,
+        channel,
         target,
         target_dir,
         docker_in_docker,

src/main.rs

@@ -228,9 +228,19 @@ fn run() -> Result<ExitStatus> {
                 .unwrap_or_else(|| Target::from(host.triple(), &target_list));
             let toml = toml(&root)?;
 
-            let sysroot = rustc::sysroot(&host, &target, verbose)?;
-            let toolchain = sysroot.file_name().and_then(|file_name| file_name.to_str())
+            let mut sysroot = rustc::sysroot(&host, &target, verbose)?;
+            let default_toolchain = sysroot.file_name().and_then(|file_name| file_name.to_str())
                 .ok_or("couldn't get toolchain name")?;
+            let toolchain = if let Some(channel) = args.channel {
+                [channel].iter().map(|c| c.as_str()).chain(
+                    default_toolchain.splitn(2, '-').skip(1)
+                )
+                    .collect::<Vec<_>>()
+                    .join("-")
+            } else {
+                default_toolchain.to_string()
+            };
+            sysroot.set_file_name(&toolchain);
 
             let installed_toolchains = rustup::installed_toolchains(verbose)?;
 
@@ -250,13 +260,13 @@ fn run() -> Result<ExitStatus> {
 
             if !uses_xargo && !available_targets.is_installed(&target) {
                 rustup::install(&target, &toolchain, verbose)?;
-            } else if !rustup::component_is_installed("rust-src", toolchain, verbose)? {
-                rustup::install_component("rust-src", toolchain, verbose)?;
+            } else if !rustup::component_is_installed("rust-src", &toolchain, verbose)? {
+                rustup::install_component("rust-src", &toolchain, verbose)?;
             }
 
             if args.subcommand.map(|sc| sc == Subcommand::Clippy).unwrap_or(false) &&
-                !rustup::component_is_installed("clippy", toolchain, verbose)? {
-                rustup::install_component("clippy", toolchain, verbose)?;
+                !rustup::component_is_installed("clippy", &toolchain, verbose)? {
+                rustup::install_component("clippy", &toolchain, verbose)?;
             }
 
             let needs_interpreter = args.subcommand.map(|sc| sc.needs_interpreter()).unwrap_or(false);