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

   1 use anyhow::Error;
   2 use flate2::read::GzDecoder;
   3 use std::collections::HashMap;
   4 use std::fs::File;
   5 use std::io::Read;
   6 use std::path::{Path, PathBuf};
   7 use tar::Archive;
   8
   9 const DEFAULT_TARGET: &str = "x86_64-unknown-linux-gnu";
  10 const RUSTC_VERSION: &str = include_str!("../../../version");
  11
  12 #[derive(Debug, Hash, Eq, PartialEq, Clone)]
  13 pub(crate) enum PkgType {
  14     Rust,
  15     RustSrc,
  16     Cargo,
  17     Rls,
  18     RustAnalyzer,
  19     Clippy,
  20     Rustfmt,
  21     LlvmTools,
  22     Miri,
  23     Other(String),
  24 }
  25
  26 impl PkgType {
  27     pub(crate) fn from_component(component: &str) -> Self {
  28         match component {
  29             "rust" => PkgType::Rust,
  30             "rust-src" => PkgType::RustSrc,
  31             "cargo" => PkgType::Cargo,
  32             "rls" | "rls-preview" => PkgType::Rls,
  33             "rust-analyzer" | "rust-analyzer-preview" => PkgType::RustAnalyzer,
  34             "clippy" | "clippy-preview" => PkgType::Clippy,
  35             "rustfmt" | "rustfmt-preview" => PkgType::Rustfmt,
  36             "llvm-tools" | "llvm-tools-preview" => PkgType::LlvmTools,
  37             "miri" | "miri-preview" => PkgType::Miri,
  38             other => PkgType::Other(other.into()),
  39         }
  40     }
  41
  42     /// First part of the tarball name.
  43     fn tarball_component_name(&self) -> &str {
  44         match self {
  45             PkgType::Rust => "rust",
  46             PkgType::RustSrc => "rust-src",
  47             PkgType::Cargo => "cargo",
  48             PkgType::Rls => "rls",
  49             PkgType::RustAnalyzer => "rust-analyzer",
  50             PkgType::Clippy => "clippy",
  51             PkgType::Rustfmt => "rustfmt",
  52             PkgType::LlvmTools => "llvm-tools",
  53             PkgType::Miri => "miri",
  54             PkgType::Other(component) => component,
  55         }
  56     }
  57
  58     /// Whether this package has the same version as Rust itself, or has its own `version` and
  59     /// `git-commit-hash` files inside the tarball.
  60     fn should_use_rust_version(&self) -> bool {
  61         match self {
  62             PkgType::Cargo => false,
  63             PkgType::Rls => false,
  64             PkgType::RustAnalyzer => false,
  65             PkgType::Clippy => false,
  66             PkgType::Rustfmt => false,
  67             PkgType::LlvmTools => false,
  68             PkgType::Miri => false,
  69
  70             PkgType::Rust => true,
  71             PkgType::RustSrc => true,
  72             PkgType::Other(_) => true,
  73         }
  74     }
  75
  76     /// Whether this package is target-independent or not.
  77     fn target_independent(&self) -> bool {
  78         *self == PkgType::RustSrc
  79     }
  80 }
  81
  82 #[derive(Debug, Default, Clone)]
  83 pub(crate) struct VersionInfo {
  84     pub(crate) version: Option<String>,
  85     pub(crate) git_commit: Option<String>,
  86     pub(crate) present: bool,
  87 }
  88
  89 pub(crate) struct Versions {
  90     channel: String,
  91     dist_path: PathBuf,
  92     versions: HashMap<PkgType, VersionInfo>,
  93 }
  94
  95 impl Versions {
  96     pub(crate) fn new(channel: &str, dist_path: &Path) -> Result<Self, Error> {
  97         Ok(Self { channel: channel.into(), dist_path: dist_path.into(), versions: HashMap::new() })
  98     }
  99
 100     pub(crate) fn channel(&self) -> &str {
 101         &self.channel
 102     }
 103
 104     pub(crate) fn version(&mut self, mut package: &PkgType) -> Result<VersionInfo, Error> {
 105         if package.should_use_rust_version() {
 106             package = &PkgType::Rust;
 107         }
 108
 109         match self.versions.get(package) {
 110             Some(version) => Ok(version.clone()),
 111             None => {
 112                 let version_info = self.load_version_from_tarball(package)?;
 113                 self.versions.insert(package.clone(), version_info.clone());
 114                 Ok(version_info)
 115             }
 116         }
 117     }
 118
 119     fn load_version_from_tarball(&mut self, package: &PkgType) -> Result<VersionInfo, Error> {
 120         let tarball_name = self.tarball_name(package, DEFAULT_TARGET)?;
 121         let tarball = self.dist_path.join(tarball_name);
 122
 123         let file = match File::open(&tarball) {
 124             Ok(file) => file,
 125             Err(err) if err.kind() == std::io::ErrorKind::NotFound => {
 126                 // Missing tarballs do not return an error, but return empty data.
 127                 return Ok(VersionInfo::default());
 128             }
 129             Err(err) => return Err(err.into()),
 130         };
 131         let mut tar = Archive::new(GzDecoder::new(file));
 132
 133         let mut version = None;
 134         let mut git_commit = None;
 135         for entry in tar.entries()? {
 136             let mut entry = entry?;
 137
 138             let dest;
 139             match entry.path()?.components().nth(1).and_then(|c| c.as_os_str().to_str()) {
 140                 Some("version") => dest = &mut version,
 141                 Some("git-commit-hash") => dest = &mut git_commit,
 142                 _ => continue,
 143             }
 144             let mut buf = String::new();
 145             entry.read_to_string(&mut buf)?;
 146             *dest = Some(buf);
 147
 148             // Short circuit to avoid reading the whole tar file if not necessary.
 149             if version.is_some() && git_commit.is_some() {
 150                 break;
 151             }
 152         }
 153
 154         Ok(VersionInfo { version, git_commit, present: true })
 155     }
 156
 157     pub(crate) fn disable_version(&mut self, package: &PkgType) {
 158         match self.versions.get_mut(package) {
 159             Some(version) => {
 160                 *version = VersionInfo::default();
 161             }
 162             None => {
 163                 self.versions.insert(package.clone(), VersionInfo::default());
 164             }
 165         }
 166     }
 167
 168     pub(crate) fn tarball_name(
 169         &mut self,
 170         package: &PkgType,
 171         target: &str,
 172     ) -> Result<String, Error> {
 173         let component_name = package.tarball_component_name();
 174         let version = match self.channel.as_str() {
 175             "stable" => RUSTC_VERSION.into(),
 176             "beta" => "beta".into(),
 177             "nightly" => "nightly".into(),
 178             _ => format!("{}-dev", RUSTC_VERSION),
 179         };
 180
 181         if package.target_independent() {
 182             Ok(format!("{}-{}.tar.gz", component_name, version))
 183         } else {
 184             Ok(format!("{}-{}-{}.tar.gz", component_name, version, target))
 185         }
 186     }
 187
 188     pub(crate) fn rustc_version(&self) -> &str {
 189         RUSTC_VERSION
 190     }
 191 }