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 = "1.44.1";
  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").arg("rev-parse").current_dir(dir).output() {
  37             Ok(ref out) if out.status.success() => {}
  38             _ => return GitInfo { inner: None },
  39         }
  40
  41         // Ok, let's scrape some info
  42         let ver_date = output(
  43             Command::new("git")
  44                 .current_dir(dir)
  45                 .arg("log")
  46                 .arg("-1")
  47                 .arg("--date=short")
  48                 .arg("--pretty=format:%cd"),
  49         );
  50         let ver_hash = output(Command::new("git").current_dir(dir).arg("rev-parse").arg("HEAD"));
  51         let short_ver_hash = output(
  52             Command::new("git").current_dir(dir).arg("rev-parse").arg("--short=9").arg("HEAD"),
  53         );
  54         GitInfo {
  55             inner: Some(Info {
  56                 commit_date: ver_date.trim().to_string(),
  57                 sha: ver_hash.trim().to_string(),
  58                 short_sha: short_ver_hash.trim().to_string(),
  59             }),
  60         }
  61     }
  62
  63     pub fn sha(&self) -> Option<&str> {
  64         self.inner.as_ref().map(|s| &s.sha[..])
  65     }
  66
  67     pub fn sha_short(&self) -> Option<&str> {
  68         self.inner.as_ref().map(|s| &s.short_sha[..])
  69     }
  70
  71     pub fn commit_date(&self) -> Option<&str> {
  72         self.inner.as_ref().map(|s| &s.commit_date[..])
  73     }
  74
  75     pub fn version(&self, build: &Build, num: &str) -> String {
  76         let mut version = build.release(num);
  77         if let Some(ref inner) = self.inner {
  78             version.push_str(" (");
  79             version.push_str(&inner.short_sha);
  80             version.push_str(" ");
  81             version.push_str(&inner.commit_date);
  82             version.push_str(")");
  83         }
  84         version
  85     }
  86
  87     pub fn is_git(&self) -> bool {
  88         self.inner.is_some()
  89     }
  90 }