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use super::{Context, Module, RootModuleConfig};
use crate::configs::elixir::ElixirConfig;
use crate::formatter::StringFormatter;
use crate::utils;
use once_cell::sync::Lazy;
use regex::Regex;
use std::ops::Deref;
const ELIXIR_VERSION_PATTERN: &str = "\
Erlang/OTP (?P<otp>\\d+)[^\\n]+
Elixir (?P<elixir>\\d[.\\d]+).*";
/// Create a module with the current Elixir version
///
/// Will display the Elixir version if any of the following criteria are met:
/// - Current directory contains a `mix.exs` file
pub fn module<'a>(context: &'a Context) -> Option<Module<'a>> {
let is_elixir_project = context.try_begin_scan()?.set_files(&["mix.exs"]).is_match();
if !is_elixir_project {
return None;
}
let versions = Lazy::new(get_elixir_version);
let mut module = context.new_module("elixir");
let config = ElixirConfig::try_load(module.config);
let parsed = StringFormatter::new(config.format).and_then(|formatter| {
formatter
.map_meta(|var, _| match var {
"symbol" => Some(config.symbol),
_ => None,
})
.map_style(|variable| match variable {
"style" => Some(Ok(config.style)),
_ => None,
})
.map(|variable| match variable {
"version" => versions
.deref()
.as_ref()
.map(|(_, elixir_version)| elixir_version)
.map(Ok),
"otp_version" => versions
.deref()
.as_ref()
.map(|(otp_version, _)| otp_version)
.map(Ok),
_ => None,
})
.parse(None)
});
module.set_segments(match parsed {
Ok(segments) => segments,
Err(error) => {
log::warn!("Error in module `elixir`:\n{}", error);
return None;
}
});
Some(module)
}
fn get_elixir_version() -> Option<(String, String)> {
let output = utils::exec_cmd("elixir", &["--version"])?.stdout;
parse_elixir_version(&output)
}
fn parse_elixir_version(version: &str) -> Option<(String, String)> {
let version_regex = Regex::new(ELIXIR_VERSION_PATTERN).ok()?;
let captures = version_regex.captures(version)?;
let otp_version = captures["otp"].to_owned();
let elixir_version = captures["elixir"].to_owned();
Some((otp_version, elixir_version))
}
#[cfg(test)]
mod tests {
use super::*;
use crate::test::ModuleRenderer;
use ansi_term::Color;
use std::fs::File;
use std::io;
#[test]
fn test_parse_elixir_version() {
const OUTPUT: &str = "\
Erlang/OTP 22 [erts-10.5] [source] [64-bit] [smp:8:8] [ds:8:8:10] [async-threads:1] [hipe]
Elixir 1.10 (compiled with Erlang/OTP 22)
";
assert_eq!(
parse_elixir_version(OUTPUT),
Some(("22".to_owned(), "1.10".to_owned()))
);
}
#[test]
fn test_without_mix_file() -> io::Result<()> {
let dir = tempfile::tempdir()?;
let expected = None;
let output = ModuleRenderer::new("elixir").path(dir.path()).collect();
assert_eq!(output, expected);
dir.close()
}
#[test]
fn test_with_mix_file() -> io::Result<()> {
let dir = tempfile::tempdir()?;
File::create(dir.path().join("mix.exs"))?.sync_all()?;
let expected = Some(format!(
"via {}",
Color::Purple.bold().paint("💧 1.10 (OTP 22) ")
));
let output = ModuleRenderer::new("elixir").path(dir.path()).collect();
assert_eq!(output, expected);
dir.close()
}
}
|
