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use super::{Context, Module, RootModuleConfig};
use crate::configs::erlang::ErlangConfig;
use crate::formatter::StringFormatter;
use crate::formatter::VersionFormatter;
/// Create a module with the current Erlang version
pub fn module<'a>(context: &'a Context) -> Option<Module<'a>> {
let mut module = context.new_module("erlang");
let config = ErlangConfig::try_load(module.config);
let is_erlang_project = context
.try_begin_scan()?
.set_files(&config.detect_files)
.set_extensions(&config.detect_extensions)
.set_folders(&config.detect_folders)
.is_match();
if !is_erlang_project {
return None;
}
let parsed = StringFormatter::new(config.format).and_then(|formatter| {
formatter
.map_meta(|variable, _| match variable {
"symbol" => Some(config.symbol),
_ => None,
})
.map_style(|variable| match variable {
"style" => Some(Ok(config.style)),
_ => None,
})
.map(|variable| match variable {
"version" => {
let erlang_version = get_erlang_version(context)?;
VersionFormatter::format_module_version(
module.get_name(),
&erlang_version,
config.version_format,
)
.map(Ok)
}
_ => None,
})
.parse(None)
});
module.set_segments(match parsed {
Ok(segments) => segments,
Err(error) => {
log::warn!("Error in module `erlang`:\n{}", error);
return None;
}
});
Some(module)
}
fn get_erlang_version(context: &Context) -> Option<String> {
Some(context.exec_cmd(
"erl",
&[
"-noshell",
"-eval",
"Fn=filename:join([code:root_dir(),\"releases\",erlang:system_info(otp_release),\"OTP_VERSION\"]),\
{ok,Content}=file:read_file(Fn),\
io:format(\"~s\",[Content]),\
halt(0)."
]
)?.stdout.trim().to_string())
}
#[cfg(test)]
mod tests {
use crate::test::ModuleRenderer;
use ansi_term::Color;
use std::fs::File;
use std::io;
#[test]
fn test_without_config() -> io::Result<()> {
let dir = tempfile::tempdir()?;
let expected = None;
let output = ModuleRenderer::new("erlang").path(dir.path()).collect();
assert_eq!(output, expected);
dir.close()
}
#[test]
fn test_with_config() -> io::Result<()> {
let dir = tempfile::tempdir()?;
File::create(dir.path().join("rebar.config"))?.sync_all()?;
let expected = Some(format!("via {}", Color::Red.bold().paint(" v22.1.3 ")));
let output = ModuleRenderer::new("erlang").path(dir.path()).collect();
assert_eq!(output, expected);
dir.close()
}
}
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