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|
use super::{Context, Module, RootModuleConfig};
use crate::configs::nix_shell::NixShellConfig;
use crate::formatter::StringFormatter;
/// Creates a module showing if inside a nix-shell
///
/// The module will use the `$IN_NIX_SHELL` and `$name` environment variable to
/// determine if it's inside a nix-shell and the name of it.
///
/// The following options are availables:
/// - impure_msg (string) // change the impure msg
/// - pure_msg (string) // change the pure msg
///
/// Will display the following:
/// - pure (name) // $name == "name" in a pure nix-shell
/// - impure (name) // $name == "name" in an impure nix-shell
/// - pure // $name == "" in a pure nix-shell
/// - impure // $name == "" in an impure nix-shell
pub fn module<'a>(context: &'a Context) -> Option<Module<'a>> {
let mut module = context.new_module("nix_shell");
let config: NixShellConfig = NixShellConfig::try_load(module.config);
let shell_name = context.get_env("name");
let shell_type = context.get_env("IN_NIX_SHELL")?;
let shell_type_format = match shell_type.as_ref() {
"impure" => config.impure_msg,
"pure" => config.pure_msg,
_ => {
return None;
}
};
let parsed = StringFormatter::new(config.format).and_then(|formatter| {
formatter
.map_meta(|variable, _| match variable {
"symbol" => Some(config.symbol),
"state" => Some(shell_type_format),
_ => None,
})
.map_style(|variable| match variable {
"style" => Some(Ok(config.style)),
_ => None,
})
.map(|variable| match variable {
"name" => shell_name.as_ref().map(Ok),
_ => None,
})
.parse(None)
});
module.set_segments(match parsed {
Ok(segments) => segments,
Err(error) => {
log::warn!("Error in module `nix_shell`:\n{}", error);
return None;
}
});
Some(module)
}
#[cfg(test)]
mod tests {
use crate::test::ModuleRenderer;
use ansi_term::Color;
#[test]
fn no_env_variables() {
let actual = ModuleRenderer::new("nix_shell").collect();
let expected = None;
assert_eq!(expected, actual);
}
#[test]
fn invalid_env_variables() {
let actual = ModuleRenderer::new("nix_shell")
.env("IN_NIX_SHELL", "something_wrong")
.collect();
let expected = None;
assert_eq!(expected, actual);
}
#[test]
fn pure_shell() {
let actual = ModuleRenderer::new("nix_shell")
.env("IN_NIX_SHELL", "pure")
.collect();
let expected = Some(format!("via {} ", Color::Blue.bold().paint("❄️ pure")));
assert_eq!(expected, actual);
}
#[test]
fn impure_shell() {
let actual = ModuleRenderer::new("nix_shell")
.env("IN_NIX_SHELL", "impure")
.collect();
let expected = Some(format!("via {} ", Color::Blue.bold().paint("❄️ impure")));
assert_eq!(expected, actual);
}
#[test]
fn pure_shell_name() {
let actual = ModuleRenderer::new("nix_shell")
.env("IN_NIX_SHELL", "pure")
.env("name", "starship")
.collect();
let expected = Some(format!(
"via {} ",
Color::Blue.bold().paint("❄️ pure (starship)")
));
assert_eq!(expected, actual);
}
#[test]
fn impure_shell_name() {
let actual = ModuleRenderer::new("nix_shell")
.env("IN_NIX_SHELL", "impure")
.env("name", "starship")
.collect();
let expected = Some(format!(
"via {} ",
Color::Blue.bold().paint("❄️ impure (starship)")
));
assert_eq!(expected, actual);
}
}
|
