src/bootstrap/channel.rs

   1 //! Build configuration for Rust's release channels.
   2 //!
   3 //! Implements the stable/beta/nightly channel distinctions by setting various
   4 //! flags like the `unstable_features`, calculating variables like `release` and
   5 //! `package_vers`, and otherwise indicating to the compiler what it should
   6 //! print out as part of its version information.
   7
   8 use std::path::Path;
   9 use std::process::Command;
  10
  11 use build_helper::output;
  12
  13 use crate::Build;
  14
  15 // The version number
  16 pub const CFG_RELEASE_NUM: &str = "1.37.0";
  17
  18 pub struct GitInfo {
  19     inner: Option<Info>,
  20 }
  21
  22 struct Info {
  23     commit_date: String,
  24     sha: String,
  25     short_sha: String,
  26 }
  27
  28 impl GitInfo {
  29     pub fn new(ignore_git: bool, dir: &Path) -> GitInfo {
  30         // See if this even begins to look like a git dir
  31         if ignore_git || !dir.join(".git").exists() {
  32             return GitInfo { inner: None }
  33         }
  34
  35         // Make sure git commands work
  36         match Command::new("git")
  37             .arg("rev-parse")
  38             .current_dir(dir)
  39             .output()
  40         {
  41             Ok(ref out) if out.status.success() => {}
  42             _ => return GitInfo { inner: None },
  43         }
  44
  45         // Ok, let's scrape some info
  46         let ver_date = output(Command::new("git").current_dir(dir)
  47                                       .arg("log").arg("-1")
  48                                       .arg("--date=short")
  49                                       .arg("--pretty=format:%cd"));
  50         let ver_hash = output(Command::new("git").current_dir(dir)
  51                                       .arg("rev-parse").arg("HEAD"));
  52         let short_ver_hash = output(Command::new("git")
  53                                             .current_dir(dir)
  54                                             .arg("rev-parse")
  55                                             .arg("--short=9")
  56                                             .arg("HEAD"));
  57         GitInfo {
  58             inner: Some(Info {
  59                 commit_date: ver_date.trim().to_string(),
  60                 sha: ver_hash.trim().to_string(),
  61                 short_sha: short_ver_hash.trim().to_string(),
  62             }),
  63         }
  64     }
  65
  66     pub fn sha(&self) -> Option<&str> {
  67         self.inner.as_ref().map(|s| &s.sha[..])
  68     }
  69
  70     pub fn sha_short(&self) -> Option<&str> {
  71         self.inner.as_ref().map(|s| &s.short_sha[..])
  72     }
  73
  74     pub fn commit_date(&self) -> Option<&str> {
  75         self.inner.as_ref().map(|s| &s.commit_date[..])
  76     }
  77
  78     pub fn version(&self, build: &Build, num: &str) -> String {
  79         let mut version = build.release(num);
  80         if let Some(ref inner) = self.inner {
  81             version.push_str(" (");
  82             version.push_str(&inner.short_sha);
  83             version.push_str(" ");
  84             version.push_str(&inner.commit_date);
  85             version.push_str(")");
  86         }
  87         version
  88     }
  89
  90     pub fn is_git(&self) -> bool {
  91         self.inner.is_some()
  92     }
  93 }