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use ansi_term::Color;
use std::path::PathBuf;
use std::process::Command;
use super::Segment;
use crate::context::Context;
/// Creates a segment with the current Node.js version
///
/// Will display the Node.js version if any of the following criteria are met:
/// - Current directory contains a `.js` file
/// - Current directory contains a `package.json` file
/// - Current directory contains a `node_modules` directory
pub fn segment(context: &Context) -> Option<Segment> {
let is_js_project = context.dir_files.iter().any(has_js_files);
if !is_js_project {
return None;
}
match get_node_version() {
Some(node_version) => {
const NODE_CHAR: &str = "⬢";
const SEGMENT_COLOR: Color = Color::Green;
let mut segment = Segment::new("node");
segment.set_style(SEGMENT_COLOR);
let formatted_version = node_version.trim();
segment.set_value(format!("{} {}", NODE_CHAR, formatted_version));
Some(segment)
}
None => None,
}
}
fn has_js_files(dir_entry: &PathBuf) -> bool {
let is_js_file =
|d: &PathBuf| -> bool { d.is_file() && d.extension().unwrap_or_default() == "js" };
let is_node_modules =
|d: &PathBuf| -> bool { d.is_dir() && d.file_name().unwrap_or_default() == "node_modules" };
let is_package_json = |d: &PathBuf| -> bool {
d.is_file() && d.file_name().unwrap_or_default() == "package.json"
};
is_js_file(&dir_entry) || is_node_modules(&dir_entry) || is_package_json(&dir_entry)
}
fn get_node_version() -> Option<String> {
match Command::new("node").arg("--version").output() {
Ok(output) => Some(String::from_utf8(output.stdout).unwrap()),
Err(_) => None,
}
}
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