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[rust.git] / 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 = "1.43.0";
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").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 }