| 1 | //! Running git, and reading what the current repository says. |
| 2 | |
| 3 | use std::process::{Command, Stdio}; |
| 4 | |
| 5 | use crate::error::{Error, Result}; |
| 6 | |
| 7 | /// Runs git and returns its output, trimmed. |
| 8 | pub fn run(args: &[&str]) -> Result<String> { |
| 9 | let output = Command::new("git") |
| 10 | .args(args) |
| 11 | .stdin(Stdio::null()) |
| 12 | .output() |
| 13 | .map_err(|e| Error::failed(format!("Could not run git: {e}")))?; |
| 14 | if !output.status.success() { |
| 15 | let stderr = String::from_utf8_lossy(&output.stderr); |
| 16 | let line = stderr |
| 17 | .lines() |
| 18 | .find(|l| !l.trim().is_empty()) |
| 19 | .unwrap_or("") |
| 20 | .trim(); |
| 21 | return Err(Error::failed(format!( |
| 22 | "git {} failed: {line}", |
| 23 | args.join(" ") |
| 24 | ))); |
| 25 | } |
| 26 | Ok(String::from_utf8_lossy(&output.stdout) |
| 27 | .trim_end() |
| 28 | .to_owned()) |
| 29 | } |
| 30 | |
| 31 | /// Runs git with its output on the terminal, as for a clone or a push. |
| 32 | pub fn run_visible(args: &[&str]) -> Result<()> { |
| 33 | let status = Command::new("git") |
| 34 | .args(args) |
| 35 | .status() |
| 36 | .map_err(|e| Error::failed(format!("Could not run git: {e}")))?; |
| 37 | if !status.success() { |
| 38 | return Err(Error::exit(crate::error::Kind::Failed)); |
| 39 | } |
| 40 | Ok(()) |
| 41 | } |
| 42 | |
| 43 | pub fn ok(args: &[&str]) -> bool { |
| 44 | Command::new("git") |
| 45 | .args(args) |
| 46 | .stdin(Stdio::null()) |
| 47 | .stdout(Stdio::null()) |
| 48 | .stderr(Stdio::null()) |
| 49 | .status() |
| 50 | .is_ok_and(|s| s.success()) |
| 51 | } |
| 52 | |
| 53 | /// The remotes, in the order git lists them, with their fetch URLs. |
| 54 | pub fn remotes() -> Vec<(String, String)> { |
| 55 | let Ok(out) = run(&["remote", "-v"]) else { |
| 56 | return Vec::new(); |
| 57 | }; |
| 58 | let mut seen = Vec::<(String, String)>::new(); |
| 59 | for line in out.lines() { |
| 60 | let mut parts = line.split_whitespace(); |
| 61 | let (Some(name), Some(url)) = (parts.next(), parts.next()) else { |
| 62 | continue; |
| 63 | }; |
| 64 | if line.ends_with("(fetch)") && !seen.iter().any(|(n, _)| n == name) { |
| 65 | seen.push((name.to_owned(), url.to_owned())); |
| 66 | } |
| 67 | } |
| 68 | seen |
| 69 | } |
| 70 | |
| 71 | pub fn current_branch() -> Option<String> { |
| 72 | run(&["symbolic-ref", "--quiet", "--short", "HEAD"]) |
| 73 | .ok() |
| 74 | .filter(|b| !b.is_empty()) |
| 75 | } |
| 76 | |
| 77 | /// The commits on `head` that `base` lacks, oldest first: (subject, body). |
| 78 | pub fn commits_between(base: &str, head: &str) -> Vec<(String, String)> { |
| 79 | let range = format!("{base}..{head}"); |
| 80 | let Ok(out) = run(&["log", "--reverse", "--format=%s%x1f%b%x1e", &range]) else { |
| 81 | return Vec::new(); |
| 82 | }; |
| 83 | out.split('\u{1e}') |
| 84 | .filter_map(|entry| { |
| 85 | let entry = entry.trim_matches(['\n', '\r']); |
| 86 | let (subject, body) = entry.split_once('\u{1f}')?; |
| 87 | Some((subject.trim().to_owned(), body.trim().to_owned())) |
| 88 | }) |
| 89 | .collect() |
| 90 | } |