73 lines
2.3 KiB
Rust
73 lines
2.3 KiB
Rust
use ansi_term::Color;
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use std::process::Command;
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use super::{Context, Module};
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/// Creates a module with the current Rust version
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///
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/// Will display the Rust version if any of the following criteria are met:
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/// - Current directory contains a file with a `.rs` extension
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/// - Current directory contains a `Cargo.toml` file
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pub fn module<'a>(context: &'a Context) -> Option<Module<'a>> {
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let is_rs_project = context
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.new_scan_dir()
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.set_files(&["Cargo.toml"])
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.set_extensions(&["rs"])
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.scan();
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if !is_rs_project {
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return None;
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}
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match get_rust_version() {
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Some(rust_version) => {
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const RUST_CHAR: &str = "🦀 ";
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let module_color = Color::Red.bold();
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let mut module = context.new_module("rust")?;
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module.set_style(module_color);
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let formatted_version = format_rustc_version(rust_version);
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module.new_segment("symbol", RUST_CHAR);
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module.new_segment("version", &formatted_version);
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Some(module)
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}
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None => None,
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}
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}
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fn get_rust_version() -> Option<String> {
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match Command::new("rustc").arg("--version").output() {
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Ok(output) => Some(String::from_utf8(output.stdout).unwrap()),
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Err(_) => None,
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}
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}
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fn format_rustc_version(mut rustc_stdout: String) -> String {
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let offset = &rustc_stdout.find('(').unwrap_or_else(|| rustc_stdout.len());
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let formatted_version: String = rustc_stdout.drain(..offset).collect();
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format!("v{}", formatted_version.replace("rustc", "").trim())
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}
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#[cfg(test)]
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mod tests {
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use super::*;
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#[test]
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fn test_format_rustc_version() {
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let nightly_input = String::from("rustc 1.34.0-nightly (b139669f3 2019-04-10)");
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assert_eq!(format_rustc_version(nightly_input), "v1.34.0-nightly");
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let beta_input = String::from("rustc 1.34.0-beta.1 (2bc1d406d 2019-04-10)");
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assert_eq!(format_rustc_version(beta_input), "v1.34.0-beta.1");
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let stable_input = String::from("rustc 1.34.0 (91856ed52 2019-04-10)");
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assert_eq!(format_rustc_version(stable_input), "v1.34.0");
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let version_without_hash = String::from("rustc 1.34.0");
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assert_eq!(format_rustc_version(version_without_hash), "v1.34.0");
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}
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}
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