70 lines
1.9 KiB
Rust
70 lines
1.9 KiB
Rust
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use super::{Context, Module, ModuleConfig};
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use crate::configs::guix_shell::GuixShellConfig;
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use crate::formatter::StringFormatter;
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/// Creates a module showing if inside a guix-shell
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///
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/// The module will use the `$GUIX_ENVIRONMENT` environment variable to determine if it's
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/// inside a guix-shell and the name of it.
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pub fn module<'a>(context: &'a Context) -> Option<Module<'a>> {
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let mut module = context.new_module("guix_shell");
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let config: GuixShellConfig = GuixShellConfig::try_load(module.config);
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let is_guix_shell = context.get_env("GUIX_ENVIRONMENT").is_some();
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if !is_guix_shell {
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return None;
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};
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let parsed = StringFormatter::new(config.format).and_then(|formatter| {
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formatter
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.map_meta(|variable, _| match variable {
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"symbol" => Some(config.symbol),
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_ => None,
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})
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.map_style(|variable| match variable {
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"style" => Some(Ok(config.style)),
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_ => None,
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})
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.parse(None, Some(context))
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});
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module.set_segments(match parsed {
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Ok(segments) => segments,
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Err(error) => {
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log::warn!("Error in module `guix_shell`:\n{}", error);
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return None;
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}
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});
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Some(module)
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}
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#[cfg(test)]
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mod tests {
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use crate::test::ModuleRenderer;
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use nu_ansi_term::Color;
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#[test]
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fn no_env_variables() {
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let actual = ModuleRenderer::new("guix_shell").collect();
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let expected = None;
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assert_eq!(expected, actual);
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}
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#[test]
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fn env_variables() {
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let actual = ModuleRenderer::new("guix_shell")
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.env(
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"GUIX_ENVIRONMENT",
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"/gnu/store/7vmfs4khf4fllsh83kqkxssbw3437qsh-profile",
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)
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.collect();
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let expected = Some(format!("via {} ", Color::Yellow.bold().paint("🐃 ")));
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assert_eq!(expected, actual);
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}
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}
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