bootstrap: always use the Rust version in package names

The format of the tarballs produced by CI is roughly the following:

    {component}-{release}-{target}.{ext}

While on the beta and nightly channels `{release}` is just the channel
name, on the stable channel is either the Rust version or the version of
the component we're shipping:

    cargo-0.47.0-x86_64-unknown-linux-gnu.tar.xz
    clippy-0.0.212-x86_64-unknown-linux-gnu.tar.xz
    llvm-tools-1.46.0-x86_64-unknown-linux-gnu.tar.xz
    miri-0.1.0-x86_64-unknown-linux-gnu.tar.xz
    rls-1.41.0-x86_64-unknown-linux-gnu.tar.xz
    rust-1.46.0-x86_64-unknown-linux-gnu.tar.xz
    ...

This makes it really hard to get the package URL without having access
to the manifest (and there is no manifest on ci-artifacts.rlo), as there
is no consistent version number to use.

This commit addresses the problem by always using the Rust version
number as `{release}` for the stable channel, regardless of the version
number of the component we're shipping. I chose that instead of "stable"
to avoid breaking the URL scheme *that* much.

Rustup should not be affected by this change, as it fetches the URLs
from the manifest. Unfortunately we don't have a way to test other
clients before making a stable release, as this change only affects the
stable channel.

src/bootstrap/dist.rs

@@ -26,24 +26,7 @@
 use time::{self, Timespec};
 
 pub fn pkgname(builder: &Builder<'_>, component: &str) -> String {
-    if component == "cargo" {
-        format!("{}-{}", component, builder.cargo_package_vers())
-    } else if component == "rls" {
-        format!("{}-{}", component, builder.rls_package_vers())
-    } else if component == "rust-analyzer" {
-        format!("{}-{}", component, builder.rust_analyzer_package_vers())
-    } else if component == "clippy" {
-        format!("{}-{}", component, builder.clippy_package_vers())
-    } else if component == "miri" {
-        format!("{}-{}", component, builder.miri_package_vers())
-    } else if component == "rustfmt" {
-        format!("{}-{}", component, builder.rustfmt_package_vers())
-    } else if component == "llvm-tools" {
-        format!("{}-{}", component, builder.llvm_tools_package_vers())
-    } else {
-        assert!(component.starts_with("rust"));
-        format!("{}-{}", component, builder.rust_package_vers())
-    }
+    format!("{}-{}", component, builder.rust_package_vers())
 }
 
 pub(crate) fn distdir(builder: &Builder<'_>) -> PathBuf {

src/bootstrap/lib.rs

@@ -1051,40 +1051,6 @@ fn rust_package_vers(&self) -> String {
         self.package_vers(&self.version)
     }
 
-    /// Returns the value of `package_vers` above for Cargo
-    fn cargo_package_vers(&self) -> String {
-        self.package_vers(&self.release_num("cargo"))
-    }
-
-    /// Returns the value of `package_vers` above for rls
-    fn rls_package_vers(&self) -> String {
-        self.package_vers(&self.release_num("rls"))
-    }
-
-    /// Returns the value of `package_vers` above for rust-analyzer
-    fn rust_analyzer_package_vers(&self) -> String {
-        self.package_vers(&self.release_num("rust-analyzer/crates/rust-analyzer"))
-    }
-
-    /// Returns the value of `package_vers` above for clippy
-    fn clippy_package_vers(&self) -> String {
-        self.package_vers(&self.release_num("clippy"))
-    }
-
-    /// Returns the value of `package_vers` above for miri
-    fn miri_package_vers(&self) -> String {
-        self.package_vers(&self.release_num("miri"))
-    }
-
-    /// Returns the value of `package_vers` above for rustfmt
-    fn rustfmt_package_vers(&self) -> String {
-        self.package_vers(&self.release_num("rustfmt"))
-    }
-
-    fn llvm_tools_package_vers(&self) -> String {
-        self.package_vers(&self.version)
-    }
-
     fn llvm_tools_vers(&self) -> String {
         self.rust_version()
     }

src/tools/build-manifest/src/main.rs

@@ -252,7 +252,7 @@ fn build(&mut self) {
         }
         let manifest = self.build_manifest();
 
-        let rust_version = self.versions.package_version(&PkgType::Rust).unwrap();
+        let rust_version = self.versions.rustc_version();
         self.write_channel_files(self.versions.channel(), &manifest);
         if self.versions.channel() != rust_version {
             self.write_channel_files(&rust_version, &manifest);

src/tools/build-manifest/src/versions.rs

@@ -38,23 +38,6 @@ pub(crate) fn from_component(component: &str) -> Self {
         }
     }
 
-    /// The directory containing the `Cargo.toml` of this component inside the monorepo, to
-    /// retrieve the source code version. If `None` is returned Rust's version will be used.
-    fn rust_monorepo_path(&self) -> Option<&'static str> {
-        match self {
-            PkgType::Cargo => Some("src/tools/cargo"),
-            PkgType::Rls => Some("src/tools/rls"),
-            PkgType::RustAnalyzer => Some("src/tools/rust-analyzer/crates/rust-analyzer"),
-            PkgType::Clippy => Some("src/tools/clippy"),
-            PkgType::Rustfmt => Some("src/tools/rustfmt"),
-            PkgType::Miri => Some("src/tools/miri"),
-            PkgType::Rust => None,
-            PkgType::RustSrc => None,
-            PkgType::LlvmTools => None,
-            PkgType::Other(_) => None,
-        }
-    }
-
     /// First part of the tarball name.
     fn tarball_component_name(&self) -> &str {
         match self {
@@ -105,9 +88,7 @@ pub(crate) struct VersionInfo {
 pub(crate) struct Versions {
     channel: String,
     rustc_version: String,
-    monorepo_root: PathBuf,
     dist_path: PathBuf,
-    package_versions: HashMap<PkgType, String>,
     versions: HashMap<PkgType, VersionInfo>,
 }
 
@@ -123,9 +104,7 @@ pub(crate) fn new(
                 .context("failed to read the rustc version from src/version")?
                 .trim()
                 .to_string(),
-            monorepo_root: monorepo_root.into(),
             dist_path: dist_path.into(),
-            package_versions: HashMap::new(),
             versions: HashMap::new(),
         })
     }
@@ -204,9 +183,13 @@ pub(crate) fn tarball_name(
         target: &str,
     ) -> Result<String, Error> {
         let component_name = package.tarball_component_name();
-        let version = self.package_version(package).with_context(|| {
-            format!("failed to get the package version for component {:?}", package,)
-        })?;
+        let version = match self.channel.as_str() {
+            "stable" => self.rustc_version.clone(),
+            "beta" => "beta".into(),
+            "nightly" => "nightly".into(),
+            _ => format!("{}-dev", self.rustc_version),
+        };
+
         if package.target_independent() {
             Ok(format!("{}-{}.tar.gz", component_name, version))
         } else {
@@ -214,39 +197,7 @@ pub(crate) fn tarball_name(
         }
     }
 
-    pub(crate) fn package_version(&mut self, package: &PkgType) -> Result<String, Error> {
-        match self.package_versions.get(package) {
-            Some(release) => Ok(release.clone()),
-            None => {
-                let version = match package.rust_monorepo_path() {
-                    Some(path) => {
-                        let path = self.monorepo_root.join(path).join("Cargo.toml");
-                        let cargo_toml: CargoToml = toml::from_slice(&std::fs::read(path)?)?;
-                        cargo_toml.package.version
-                    }
-                    None => self.rustc_version.clone(),
-                };
-
-                let release = match self.channel.as_str() {
-                    "stable" => version,
-                    "beta" => "beta".into(),
-                    "nightly" => "nightly".into(),
-                    _ => format!("{}-dev", version),
-                };
-
-                self.package_versions.insert(package.clone(), release.clone());
-                Ok(release)
-            }
-        }
+    pub(crate) fn rustc_version(&self) -> &str {
+        &self.rustc_version
     }
 }
-
-#[derive(serde::Deserialize)]
-struct CargoToml {
-    package: CargoTomlPackage,
-}
-
-#[derive(serde::Deserialize)]
-struct CargoTomlPackage {
-    version: String,
-}