74 lines
2.3 KiB
Rust
74 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 Python version
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///
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/// Will display the Python version if any of the following criteria are met:
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/// - Current directory contains a `.python-version` file
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/// - Current directory contains a `requirements.txt` file
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/// - Current directory contains a `pyproject.toml` file
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/// - Current directory contains a file with the `.py` extension
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pub fn module<'a>(context: &'a Context) -> Option<Module<'a>> {
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let is_py_project = context
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.new_scan_dir()
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.set_files(&["requirements.txt", ".python-version", "pyproject.toml"])
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.set_extensions(&["py"])
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.scan();
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if !is_py_project {
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return None;
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}
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match get_python_version() {
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Some(python_version) => {
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const PYTHON_CHAR: &str = "🐍 ";
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let module_color = Color::Yellow.bold();
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let mut module = context.new_module("python")?;
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module.set_style(module_color);
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let formatted_version = format_python_version(python_version);
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module.new_segment("symbol", PYTHON_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_python_version() -> Option<String> {
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match Command::new("python").arg("--version").output() {
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Ok(output) => {
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// We have to check both stdout and stderr since for Python versions
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// < 3.4, Python reports to stderr and for Python version >= 3.5,
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// Python reports to stdout
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if output.stdout.is_empty() {
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let stderr_string = String::from_utf8(output.stderr).unwrap();
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Some(stderr_string)
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} else {
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let stdout_string = String::from_utf8(output.stdout).unwrap();
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Some(stdout_string)
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}
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}
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Err(_) => None,
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}
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}
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fn format_python_version(python_stdout: String) -> String {
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format!("v{}", python_stdout.trim_start_matches("Python ").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_python_version() {
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let input = String::from("Python 3.7.2");
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assert_eq!(format_python_version(input), "v3.7.2");
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}
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}
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