//! Construct version in the `commit-hash date chanel` format use std::{env, path::PathBuf, process::Command}; fn main() { set_rerun(); println!("cargo:rustc-env=REV={}", rev()) } fn set_rerun() { println!("cargo:rerun-if-env-changed=RUST_ANALYZER_REV"); let mut manifest_dir = PathBuf::from( env::var("CARGO_MANIFEST_DIR").expect("`CARGO_MANIFEST_DIR` is always set by cargo."), ); while manifest_dir.parent().is_some() { let head_ref = manifest_dir.join(".git/HEAD"); if head_ref.exists() { println!("cargo:rerun-if-changed={}", head_ref.display()); return; } manifest_dir.pop(); } println!("cargo:warning=Could not find `.git/HEAD` from manifest dir!"); } fn rev() -> String { if let Ok(rev) = env::var("RUST_ANALYZER_REV") { return rev; } if let Some(commit_hash) = commit_hash() { let mut buf = commit_hash; if let Some(date) = build_date() { buf.push(' '); buf.push_str(&date); } let channel = env::var("RUST_ANALYZER_CHANNEL").unwrap_or_else(|_| "dev".to_string()); buf.push(' '); buf.push_str(&channel); return buf; } "???????".to_string() } fn commit_hash() -> Option { exec("git rev-parse --short HEAD").ok() } fn build_date() -> Option { exec("date -u +%Y-%m-%d").ok() } fn exec(command: &str) -> std::io::Result { let args = command.split_ascii_whitespace().collect::>(); let output = Command::new(args[0]).args(&args[1..]).output()?; if !output.status.success() { return Err(std::io::Error::new( std::io::ErrorKind::InvalidData, format!("command {:?} returned non-zero code", command,), )); } let stdout = String::from_utf8(output.stdout) .map_err(|err| std::io::Error::new(std::io::ErrorKind::InvalidData, err))?; Ok(stdout.trim().to_string()) }