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use ansi_term::Color;
use std::process::Command;
use super::{Context, Module};
/// Creates a module with the current Ruby version
///
/// Will display the Ruby version if any of the following criteria are met:
/// - Current directory contains a `.rb` file
/// - Current directory contains a `Gemfile` file
pub fn module<'a>(context: &'a Context) -> Option<Module<'a>> {
let is_rb_project = context
.try_begin_scan()?
.set_files(&["Gemfile"])
.set_extensions(&["rb"])
.is_match();
if !is_rb_project {
return None;
}
match get_ruby_version() {
Some(ruby_version) => {
const RUBY_CHAR: &str = "💎 ";
let mut module = context.new_module("ruby");
let module_style = module
.config_value_style("style")
.unwrap_or_else(|| Color::Red.bold());
module.set_style(module_style);
let formatted_version = format_ruby_version(&ruby_version)?;
module.new_segment("symbol", RUBY_CHAR);
module.new_segment("version", &formatted_version);
Some(module)
}
None => None,
}
}
fn get_ruby_version() -> Option<String> {
match Command::new("ruby").arg("-v").output() {
Ok(output) => Some(String::from_utf8(output.stdout).unwrap()),
Err(_) => None,
}
}
fn format_ruby_version(ruby_version: &str) -> Option<String> {
let version = ruby_version
// split into ["ruby", "2.6.0p0", "linux/amd64"]
.split_whitespace()
// return "2.6.0p0"
.nth(1)?
.get(0..5)?;
let mut formatted_version = String::with_capacity(version.len() + 1);
formatted_version.push('v');
formatted_version.push_str(version);
Some(formatted_version)
}
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