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

   1 extern crate toml;
   2 #[macro_use]
   3 extern crate serde_derive;
   4
   5 use std::collections::BTreeMap;
   6 use std::env;
   7 use std::fs;
   8 use std::io::{self, Read, Write};
   9 use std::path::{PathBuf, Path};
  10 use std::process::{Command, Stdio};
  11
  12 static HOSTS: &'static [&'static str] = &[
  13     "aarch64-unknown-linux-gnu",
  14     "arm-unknown-linux-gnueabi",
  15     "arm-unknown-linux-gnueabihf",
  16     "armv7-unknown-linux-gnueabihf",
  17     "i686-apple-darwin",
  18     "i686-pc-windows-gnu",
  19     "i686-pc-windows-msvc",
  20     "i686-unknown-linux-gnu",
  21     "mips-unknown-linux-gnu",
  22     "mips64-unknown-linux-gnuabi64",
  23     "mips64el-unknown-linux-gnuabi64",
  24     "mipsel-unknown-linux-gnu",
  25     "powerpc-unknown-linux-gnu",
  26     "powerpc64-unknown-linux-gnu",
  27     "powerpc64le-unknown-linux-gnu",
  28     "s390x-unknown-linux-gnu",
  29     "x86_64-apple-darwin",
  30     "x86_64-pc-windows-gnu",
  31     "x86_64-pc-windows-msvc",
  32     "x86_64-unknown-freebsd",
  33     "x86_64-unknown-linux-gnu",
  34     "x86_64-unknown-netbsd",
  35 ];
  36
  37 static TARGETS: &'static [&'static str] = &[
  38     "aarch64-apple-ios",
  39     "aarch64-fuchsia",
  40     "aarch64-linux-android",
  41     "aarch64-pc-windows-msvc",
  42     "aarch64-unknown-cloudabi",
  43     "aarch64-unknown-linux-gnu",
  44     "aarch64-unknown-linux-musl",
  45     "arm-linux-androideabi",
  46     "arm-unknown-linux-gnueabi",
  47     "arm-unknown-linux-gnueabihf",
  48     "arm-unknown-linux-musleabi",
  49     "arm-unknown-linux-musleabihf",
  50     "armv5te-unknown-linux-gnueabi",
  51     "armv5te-unknown-linux-musleabi",
  52     "armv7-apple-ios",
  53     "armv7-linux-androideabi",
  54     "thumbv7neon-linux-androideabi",
  55     "armv7-unknown-linux-gnueabihf",
  56     "thumbv7neon-unknown-linux-gnueabihf",
  57     "armv7-unknown-linux-musleabihf",
  58     "armebv7r-none-eabi",
  59     "armebv7r-none-eabihf",
  60     "armv7r-none-eabi",
  61     "armv7r-none-eabihf",
  62     "armv7s-apple-ios",
  63     "asmjs-unknown-emscripten",
  64     "i386-apple-ios",
  65     "i586-pc-windows-msvc",
  66     "i586-unknown-linux-gnu",
  67     "i586-unknown-linux-musl",
  68     "i686-apple-darwin",
  69     "i686-linux-android",
  70     "i686-pc-windows-gnu",
  71     "i686-pc-windows-msvc",
  72     "i686-unknown-freebsd",
  73     "i686-unknown-linux-gnu",
  74     "i686-unknown-linux-musl",
  75     "mips-unknown-linux-gnu",
  76     "mips-unknown-linux-musl",
  77     "mips64-unknown-linux-gnuabi64",
  78     "mips64el-unknown-linux-gnuabi64",
  79     "mipsel-unknown-linux-gnu",
  80     "mipsel-unknown-linux-musl",
  81     "powerpc-unknown-linux-gnu",
  82     "powerpc64-unknown-linux-gnu",
  83     "powerpc64le-unknown-linux-gnu",
  84     "riscv32imc-unknown-none-elf",
  85     "riscv32imac-unknown-none-elf",
  86     "s390x-unknown-linux-gnu",
  87     "sparc64-unknown-linux-gnu",
  88     "sparcv9-sun-solaris",
  89     "thumbv6m-none-eabi",
  90     "thumbv7em-none-eabi",
  91     "thumbv7em-none-eabihf",
  92     "thumbv7m-none-eabi",
  93     "wasm32-unknown-emscripten",
  94     "wasm32-unknown-unknown",
  95     "x86_64-apple-darwin",
  96     "x86_64-apple-ios",
  97     "x86_64-fuchsia",
  98     "x86_64-linux-android",
  99     "x86_64-pc-windows-gnu",
 100     "x86_64-pc-windows-msvc",
 101     "x86_64-rumprun-netbsd",
 102     "x86_64-sun-solaris",
 103     "x86_64-unknown-cloudabi",
 104     "x86_64-unknown-freebsd",
 105     "x86_64-unknown-linux-gnu",
 106     "x86_64-unknown-linux-gnux32",
 107     "x86_64-unknown-linux-musl",
 108     "x86_64-unknown-netbsd",
 109     "x86_64-unknown-redox",
 110 ];
 111
 112 static DOCS_TARGETS: &'static [&'static str] = &[
 113     "i686-apple-darwin",
 114     "i686-pc-windows-gnu",
 115     "i686-pc-windows-msvc",
 116     "i686-unknown-linux-gnu",
 117     "x86_64-apple-darwin",
 118     "x86_64-pc-windows-gnu",
 119     "x86_64-pc-windows-msvc",
 120     "x86_64-unknown-linux-gnu",
 121 ];
 122
 123 static MINGW: &'static [&'static str] = &[
 124     "i686-pc-windows-gnu",
 125     "x86_64-pc-windows-gnu",
 126 ];
 127
 128 #[derive(Serialize)]
 129 #[serde(rename_all = "kebab-case")]
 130 struct Manifest {
 131     manifest_version: String,
 132     date: String,
 133     pkg: BTreeMap<String, Package>,
 134     renames: BTreeMap<String, Rename>
 135 }
 136
 137 #[derive(Serialize)]
 138 struct Package {
 139     version: String,
 140     git_commit_hash: Option<String>,
 141     target: BTreeMap<String, Target>,
 142 }
 143
 144 #[derive(Serialize)]
 145 struct Rename {
 146     to: String,
 147 }
 148
 149 #[derive(Serialize)]
 150 struct Target {
 151     available: bool,
 152     url: Option<String>,
 153     hash: Option<String>,
 154     xz_url: Option<String>,
 155     xz_hash: Option<String>,
 156     components: Option<Vec<Component>>,
 157     extensions: Option<Vec<Component>>,
 158 }
 159
 160 impl Target {
 161     fn unavailable() -> Target {
 162         Target {
 163             available: false,
 164             url: None,
 165             hash: None,
 166             xz_url: None,
 167             xz_hash: None,
 168             components: None,
 169             extensions: None,
 170         }
 171     }
 172 }
 173
 174 #[derive(Serialize)]
 175 struct Component {
 176     pkg: String,
 177     target: String,
 178 }
 179
 180 macro_rules! t {
 181     ($e:expr) => (match $e {
 182         Ok(e) => e,
 183         Err(e) => panic!("{} failed with {}", stringify!($e), e),
 184     })
 185 }
 186
 187 struct Builder {
 188     rust_release: String,
 189     cargo_release: String,
 190     rls_release: String,
 191     clippy_release: String,
 192     rustfmt_release: String,
 193     llvm_tools_release: String,
 194     lldb_release: String,
 195     miri_release: String,
 196
 197     input: PathBuf,
 198     output: PathBuf,
 199     gpg_passphrase: String,
 200     digests: BTreeMap<String, String>,
 201     s3_address: String,
 202     date: String,
 203
 204     rust_version: Option<String>,
 205     cargo_version: Option<String>,
 206     rls_version: Option<String>,
 207     clippy_version: Option<String>,
 208     rustfmt_version: Option<String>,
 209     llvm_tools_version: Option<String>,
 210     lldb_version: Option<String>,
 211     miri_version: Option<String>,
 212
 213     rust_git_commit_hash: Option<String>,
 214     cargo_git_commit_hash: Option<String>,
 215     rls_git_commit_hash: Option<String>,
 216     clippy_git_commit_hash: Option<String>,
 217     rustfmt_git_commit_hash: Option<String>,
 218     llvm_tools_git_commit_hash: Option<String>,
 219     lldb_git_commit_hash: Option<String>,
 220     miri_git_commit_hash: Option<String>,
 221
 222     should_sign: bool,
 223 }
 224
 225 fn main() {
 226     // Avoid signing packages while manually testing
 227     // Do NOT set this envvar in CI
 228     let should_sign = env::var("BUILD_MANIFEST_DISABLE_SIGNING").is_err();
 229
 230     // Safety check to ensure signing is always enabled on CI
 231     // The CI environment variable is set by both Travis and AppVeyor
 232     if !should_sign && env::var("CI").is_ok() {
 233         println!("The 'BUILD_MANIFEST_DISABLE_SIGNING' env var can't be enabled on CI.");
 234         println!("If you're not running this on CI, unset the 'CI' env var.");
 235         panic!();
 236     }
 237
 238     let mut args = env::args().skip(1);
 239     let input = PathBuf::from(args.next().unwrap());
 240     let output = PathBuf::from(args.next().unwrap());
 241     let date = args.next().unwrap();
 242     let rust_release = args.next().unwrap();
 243     let s3_address = args.next().unwrap();
 244     let cargo_release = args.next().unwrap();
 245     let rls_release = args.next().unwrap();
 246     let clippy_release = args.next().unwrap();
 247     let miri_release = args.next().unwrap();
 248     let rustfmt_release = args.next().unwrap();
 249     let llvm_tools_release = args.next().unwrap();
 250     let lldb_release = args.next().unwrap();
 251
 252     // Do not ask for a passphrase while manually testing
 253     let mut passphrase = String::new();
 254     if should_sign {
 255         t!(io::stdin().read_to_string(&mut passphrase));
 256     }
 257
 258     Builder {
 259         rust_release,
 260         cargo_release,
 261         rls_release,
 262         clippy_release,
 263         rustfmt_release,
 264         llvm_tools_release,
 265         lldb_release,
 266         miri_release,
 267
 268         input,
 269         output,
 270         gpg_passphrase: passphrase,
 271         digests: BTreeMap::new(),
 272         s3_address,
 273         date,
 274
 275         rust_version: None,
 276         cargo_version: None,
 277         rls_version: None,
 278         clippy_version: None,
 279         rustfmt_version: None,
 280         llvm_tools_version: None,
 281         lldb_version: None,
 282         miri_version: None,
 283
 284         rust_git_commit_hash: None,
 285         cargo_git_commit_hash: None,
 286         rls_git_commit_hash: None,
 287         clippy_git_commit_hash: None,
 288         rustfmt_git_commit_hash: None,
 289         llvm_tools_git_commit_hash: None,
 290         lldb_git_commit_hash: None,
 291         miri_git_commit_hash: None,
 292
 293         should_sign,
 294     }.build();
 295 }
 296
 297 impl Builder {
 298     fn build(&mut self) {
 299         self.rust_version = self.version("rust", "x86_64-unknown-linux-gnu");
 300         self.cargo_version = self.version("cargo", "x86_64-unknown-linux-gnu");
 301         self.rls_version = self.version("rls", "x86_64-unknown-linux-gnu");
 302         self.clippy_version = self.version("clippy", "x86_64-unknown-linux-gnu");
 303         self.rustfmt_version = self.version("rustfmt", "x86_64-unknown-linux-gnu");
 304         self.llvm_tools_version = self.version("llvm-tools", "x86_64-unknown-linux-gnu");
 305         // lldb is only built for macOS.
 306         self.lldb_version = self.version("lldb", "x86_64-apple-darwin");
 307         self.miri_version = self.version("miri", "x86_64-unknown-linux-gnu");
 308
 309         self.rust_git_commit_hash = self.git_commit_hash("rust", "x86_64-unknown-linux-gnu");
 310         self.cargo_git_commit_hash = self.git_commit_hash("cargo", "x86_64-unknown-linux-gnu");
 311         self.rls_git_commit_hash = self.git_commit_hash("rls", "x86_64-unknown-linux-gnu");
 312         self.clippy_git_commit_hash = self.git_commit_hash("clippy", "x86_64-unknown-linux-gnu");
 313         self.rustfmt_git_commit_hash = self.git_commit_hash("rustfmt", "x86_64-unknown-linux-gnu");
 314         self.llvm_tools_git_commit_hash = self.git_commit_hash("llvm-tools",
 315                                                                "x86_64-unknown-linux-gnu");
 316         self.lldb_git_commit_hash = self.git_commit_hash("lldb", "x86_64-unknown-linux-gnu");
 317         self.miri_git_commit_hash = self.git_commit_hash("miri", "x86_64-unknown-linux-gnu");
 318
 319         self.digest_and_sign();
 320         let manifest = self.build_manifest();
 321         self.write_channel_files(&self.rust_release, &manifest);
 322
 323         if self.rust_release != "beta" && self.rust_release != "nightly" {
 324             self.write_channel_files("stable", &manifest);
 325         }
 326     }
 327
 328     fn digest_and_sign(&mut self) {
 329         for file in t!(self.input.read_dir()).map(|e| t!(e).path()) {
 330             let filename = file.file_name().unwrap().to_str().unwrap();
 331             let digest = self.hash(&file);
 332             self.sign(&file);
 333             assert!(self.digests.insert(filename.to_string(), digest).is_none());
 334         }
 335     }
 336
 337     fn build_manifest(&mut self) -> Manifest {
 338         let mut manifest = Manifest {
 339             manifest_version: "2".to_string(),
 340             date: self.date.to_string(),
 341             pkg: BTreeMap::new(),
 342             renames: BTreeMap::new(),
 343         };
 344
 345         self.package("rustc", &mut manifest.pkg, HOSTS);
 346         self.package("cargo", &mut manifest.pkg, HOSTS);
 347         self.package("rust-mingw", &mut manifest.pkg, MINGW);
 348         self.package("rust-std", &mut manifest.pkg, TARGETS);
 349         self.package("rust-docs", &mut manifest.pkg, DOCS_TARGETS);
 350         self.package("rust-src", &mut manifest.pkg, &["*"]);
 351         self.package("rls-preview", &mut manifest.pkg, HOSTS);
 352         self.package("clippy-preview", &mut manifest.pkg, HOSTS);
 353         self.package("rustfmt-preview", &mut manifest.pkg, HOSTS);
 354         self.package("rust-analysis", &mut manifest.pkg, TARGETS);
 355         self.package("llvm-tools-preview", &mut manifest.pkg, TARGETS);
 356         self.package("lldb-preview", &mut manifest.pkg, TARGETS);
 357
 358         manifest.renames.insert("rls".to_owned(), Rename { to: "rls-preview".to_owned() });
 359         manifest.renames.insert("rustfmt".to_owned(), Rename { to: "rustfmt-preview".to_owned() });
 360         manifest.renames.insert("clippy".to_owned(), Rename { to: "clippy-preview".to_owned() });
 361
 362         let mut pkg = Package {
 363             version: self.cached_version("rust")
 364                          .as_ref()
 365                          .expect("Couldn't find Rust version")
 366                          .clone(),
 367             git_commit_hash: self.cached_git_commit_hash("rust").clone(),
 368             target: BTreeMap::new(),
 369         };
 370         for host in HOSTS {
 371             let filename = self.filename("rust", host);
 372             let digest = match self.digests.remove(&filename) {
 373                 Some(digest) => digest,
 374                 None => {
 375                     pkg.target.insert(host.to_string(), Target::unavailable());
 376                     continue
 377                 }
 378             };
 379             let xz_filename = filename.replace(".tar.gz", ".tar.xz");
 380             let xz_digest = self.digests.remove(&xz_filename);
 381             let mut components = Vec::new();
 382             let mut extensions = Vec::new();
 383
 384             // rustc/rust-std/cargo/docs are all required, and so is rust-mingw
 385             // if it's available for the target.
 386             components.extend(vec![
 387                 Component { pkg: "rustc".to_string(), target: host.to_string() },
 388                 Component { pkg: "rust-std".to_string(), target: host.to_string() },
 389                 Component { pkg: "cargo".to_string(), target: host.to_string() },
 390                 Component { pkg: "rust-docs".to_string(), target: host.to_string() },
 391             ]);
 392             if host.contains("pc-windows-gnu") {
 393                 components.push(Component {
 394                     pkg: "rust-mingw".to_string(),
 395                     target: host.to_string(),
 396                 });
 397             }
 398
 399             // Tools are always present in the manifest, but might be marked as unavailable if they
 400             // weren't built
 401             extensions.extend(vec![
 402                 Component { pkg: "clippy-preview".to_string(), target: host.to_string() },
 403                 Component { pkg: "rls-preview".to_string(), target: host.to_string() },
 404                 Component { pkg: "rustfmt-preview".to_string(), target: host.to_string() },
 405                 Component { pkg: "llvm-tools-preview".to_string(), target: host.to_string() },
 406                 Component { pkg: "lldb-preview".to_string(), target: host.to_string() },
 407                 Component { pkg: "rust-analysis".to_string(), target: host.to_string() },
 408             ]);
 409
 410             for target in TARGETS {
 411                 if target != host {
 412                     extensions.push(Component {
 413                         pkg: "rust-std".to_string(),
 414                         target: target.to_string(),
 415                     });
 416                 }
 417             }
 418             extensions.push(Component {
 419                 pkg: "rust-src".to_string(),
 420                 target: "*".to_string(),
 421             });
 422
 423             // If the components/extensions don't actually exist for this
 424             // particular host/target combination then nix it entirely from our
 425             // lists.
 426             {
 427                 let has_component = |c: &Component| {
 428                     if c.target == "*" {
 429                         return true
 430                     }
 431                     let pkg = match manifest.pkg.get(&c.pkg) {
 432                         Some(p) => p,
 433                         None => return false,
 434                     };
 435                     pkg.target.get(&c.target).is_some()
 436                 };
 437                 extensions.retain(&has_component);
 438                 components.retain(&has_component);
 439             }
 440
 441             pkg.target.insert(host.to_string(), Target {
 442                 available: true,
 443                 url: Some(self.url(&filename)),
 444                 hash: Some(digest),
 445                 xz_url: xz_digest.as_ref().map(|_| self.url(&xz_filename)),
 446                 xz_hash: xz_digest,
 447                 components: Some(components),
 448                 extensions: Some(extensions),
 449             });
 450         }
 451         manifest.pkg.insert("rust".to_string(), pkg);
 452
 453         return manifest;
 454     }
 455
 456     fn package(&mut self,
 457                pkgname: &str,
 458                dst: &mut BTreeMap<String, Package>,
 459                targets: &[&str]) {
 460         let (version, is_present) = match *self.cached_version(pkgname) {
 461             Some(ref version) => (version.clone(), true),
 462             None => (String::new(), false),
 463         };
 464
 465         let targets = targets.iter().map(|name| {
 466             if is_present {
 467                 let filename = self.filename(pkgname, name);
 468                 let digest = match self.digests.remove(&filename) {
 469                     Some(digest) => digest,
 470                     None => return (name.to_string(), Target::unavailable()),
 471                 };
 472                 let xz_filename = filename.replace(".tar.gz", ".tar.xz");
 473                 let xz_digest = self.digests.remove(&xz_filename);
 474
 475                 (name.to_string(), Target {
 476                     available: true,
 477                     url: Some(self.url(&filename)),
 478                     hash: Some(digest),
 479                     xz_url: xz_digest.as_ref().map(|_| self.url(&xz_filename)),
 480                     xz_hash: xz_digest,
 481                     components: None,
 482                     extensions: None,
 483                 })
 484             } else {
 485                 // If the component is not present for this build add it anyway but mark it as
 486                 // unavailable -- this way rustup won't allow upgrades without --force
 487                 (name.to_string(), Target {
 488                     available: false,
 489                     url: None,
 490                     hash: None,
 491                     xz_url: None,
 492                     xz_hash: None,
 493                     components: None,
 494                     extensions: None,
 495                 })
 496             }
 497         }).collect();
 498
 499         dst.insert(pkgname.to_string(), Package {
 500             version,
 501             git_commit_hash: self.cached_git_commit_hash(pkgname).clone(),
 502             target: targets,
 503         });
 504     }
 505
 506     fn url(&self, filename: &str) -> String {
 507         format!("{}/{}/{}",
 508                 self.s3_address,
 509                 self.date,
 510                 filename)
 511     }
 512
 513     fn filename(&self, component: &str, target: &str) -> String {
 514         if component == "rust-src" {
 515             format!("rust-src-{}.tar.gz", self.rust_release)
 516         } else if component == "cargo" {
 517             format!("cargo-{}-{}.tar.gz", self.cargo_release, target)
 518         } else if component == "rls" || component == "rls-preview" {
 519             format!("rls-{}-{}.tar.gz", self.rls_release, target)
 520         } else if component == "clippy" || component == "clippy-preview" {
 521             format!("clippy-{}-{}.tar.gz", self.clippy_release, target)
 522         } else if component == "rustfmt" || component == "rustfmt-preview" {
 523             format!("rustfmt-{}-{}.tar.gz", self.rustfmt_release, target)
 524         } else if component == "llvm-tools" || component == "llvm-tools-preview" {
 525             format!("llvm-tools-{}-{}.tar.gz", self.llvm_tools_release, target)
 526         } else if component == "lldb" || component == "lldb-preview" {
 527             format!("lldb-{}-{}.tar.gz", self.lldb_release, target)
 528         } else if component == "miri" || component == "miri-preview" {
 529             format!("miri-{}-{}.tar.gz", self.miri_release, target)
 530         } else {
 531             format!("{}-{}-{}.tar.gz", component, self.rust_release, target)
 532         }
 533     }
 534
 535     fn cached_version(&self, component: &str) -> &Option<String> {
 536         if component == "cargo" {
 537             &self.cargo_version
 538         } else if component == "rls" || component == "rls-preview" {
 539             &self.rls_version
 540         } else if component == "clippy" || component == "clippy-preview" {
 541             &self.clippy_version
 542         } else if component == "rustfmt" || component == "rustfmt-preview" {
 543             &self.rustfmt_version
 544         } else if component == "llvm-tools" || component == "llvm-tools-preview" {
 545             &self.llvm_tools_version
 546         } else if component == "lldb" || component == "lldb-preview" {
 547             &self.lldb_version
 548         } else if component == "miri" || component == "miri-preview" {
 549             &self.miri_version
 550         } else {
 551             &self.rust_version
 552         }
 553     }
 554
 555     fn cached_git_commit_hash(&self, component: &str) -> &Option<String> {
 556         if component == "cargo" {
 557             &self.cargo_git_commit_hash
 558         } else if component == "rls" || component == "rls-preview" {
 559             &self.rls_git_commit_hash
 560         } else if component == "clippy" || component == "clippy-preview" {
 561             &self.clippy_git_commit_hash
 562         } else if component == "rustfmt" || component == "rustfmt-preview" {
 563             &self.rustfmt_git_commit_hash
 564         } else if component == "llvm-tools" || component == "llvm-tools-preview" {
 565             &self.llvm_tools_git_commit_hash
 566         } else if component == "lldb" || component == "lldb-preview" {
 567             &self.lldb_git_commit_hash
 568         } else if component == "miri" || component == "miri-preview" {
 569             &self.miri_git_commit_hash
 570         } else {
 571             &self.rust_git_commit_hash
 572         }
 573     }
 574
 575     fn version(&self, component: &str, target: &str) -> Option<String> {
 576         let mut cmd = Command::new("tar");
 577         let filename = self.filename(component, target);
 578         cmd.arg("xf")
 579            .arg(self.input.join(&filename))
 580            .arg(format!("{}/version", filename.replace(".tar.gz", "")))
 581            .arg("-O");
 582         let output = t!(cmd.output());
 583         if output.status.success() {
 584             Some(String::from_utf8_lossy(&output.stdout).trim().to_string())
 585         } else {
 586             // Perhaps we didn't build this package.
 587             None
 588         }
 589     }
 590
 591     fn git_commit_hash(&self, component: &str, target: &str) -> Option<String> {
 592         let mut cmd = Command::new("tar");
 593         let filename = self.filename(component, target);
 594         cmd.arg("xf")
 595            .arg(self.input.join(&filename))
 596            .arg(format!("{}/git-commit-hash", filename.replace(".tar.gz", "")))
 597            .arg("-O");
 598         let output = t!(cmd.output());
 599         if output.status.success() {
 600             Some(String::from_utf8_lossy(&output.stdout).trim().to_string())
 601         } else {
 602             None
 603         }
 604     }
 605
 606     fn hash(&self, path: &Path) -> String {
 607         let sha = t!(Command::new("shasum")
 608                         .arg("-a").arg("256")
 609                         .arg(path.file_name().unwrap())
 610                         .current_dir(path.parent().unwrap())
 611                         .output());
 612         assert!(sha.status.success());
 613
 614         let filename = path.file_name().unwrap().to_str().unwrap();
 615         let sha256 = self.output.join(format!("{}.sha256", filename));
 616         t!(fs::write(&sha256, &sha.stdout));
 617
 618         let stdout = String::from_utf8_lossy(&sha.stdout);
 619         stdout.split_whitespace().next().unwrap().to_string()
 620     }
 621
 622     fn sign(&self, path: &Path) {
 623         if !self.should_sign {
 624             return;
 625         }
 626
 627         let filename = path.file_name().unwrap().to_str().unwrap();
 628         let asc = self.output.join(format!("{}.asc", filename));
 629         println!("signing: {:?}", path);
 630         let mut cmd = Command::new("gpg");
 631         cmd.arg("--pinentry-mode=loopback")
 632             .arg("--no-tty")
 633             .arg("--yes")
 634             .arg("--batch")
 635             .arg("--passphrase-fd").arg("0")
 636             .arg("--personal-digest-preferences").arg("SHA512")
 637             .arg("--armor")
 638             .arg("--output").arg(&asc)
 639             .arg("--detach-sign").arg(path)
 640             .stdin(Stdio::piped());
 641         let mut child = t!(cmd.spawn());
 642         t!(child.stdin.take().unwrap().write_all(self.gpg_passphrase.as_bytes()));
 643         assert!(t!(child.wait()).success());
 644     }
 645
 646     fn write_channel_files(&self, channel_name: &str, manifest: &Manifest) {
 647         self.write(&toml::to_string(&manifest).unwrap(), channel_name, ".toml");
 648         self.write(&manifest.date, channel_name, "-date.txt");
 649         self.write(manifest.pkg["rust"].git_commit_hash.as_ref().unwrap(),
 650                    channel_name, "-git-commit-hash.txt");
 651     }
 652
 653     fn write(&self, contents: &str, channel_name: &str, suffix: &str) {
 654         let dst = self.output.join(format!("channel-rust-{}{}", channel_name, suffix));
 655         t!(fs::write(&dst, contents));
 656         self.hash(&dst);
 657         self.sign(&dst);
 658     }
 659 }