mirror of
https://github.com/nushell/nushell.git
synced 2024-12-12 10:10:51 +01:00
73 lines
1.9 KiB
Rust
73 lines
1.9 KiB
Rust
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use nu_engine::current_dir;
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use nu_protocol::ast::Call;
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use nu_protocol::engine::{Command, EngineState, Stack};
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use nu_protocol::{
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Category, IntoInterruptiblePipelineData, PipelineData, ShellError, Signature, Value,
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};
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/// Source a file for environment variables.
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#[derive(Clone)]
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pub struct Shells;
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impl Command for Shells {
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fn name(&self) -> &str {
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"shells"
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}
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fn signature(&self) -> Signature {
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Signature::build("shells").category(Category::Shells)
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}
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fn usage(&self) -> &str {
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"Lists all open shells."
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}
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fn run(
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&self,
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engine_state: &EngineState,
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stack: &mut Stack,
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call: &Call,
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_input: PipelineData,
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) -> Result<PipelineData, ShellError> {
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let span = call.head;
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let cwd = current_dir(engine_state, stack)?;
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let cwd = Value::String {
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val: cwd.to_string_lossy().to_string(),
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span,
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};
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let shells = stack.get_env_var(engine_state, "NUSHELL_SHELLS");
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let shells = if let Some(v) = shells {
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v.as_list()
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.map(|x| x.to_vec())
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.unwrap_or_else(|_| vec![cwd])
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} else {
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vec![cwd]
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};
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let current_shell = stack.get_env_var(engine_state, "NUSHELL_CURRENT_SHELL");
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let current_shell = if let Some(v) = current_shell {
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v.as_integer().unwrap_or_default() as usize
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} else {
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0
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};
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let output = shells
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.into_iter()
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.enumerate()
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.map(move |(idx, val)| Value::Record {
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cols: vec!["active".to_string(), "path".to_string()],
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vals: vec![
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Value::Bool {
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val: idx == current_shell,
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span,
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},
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val,
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],
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span,
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});
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Ok(output.into_pipeline_data(None))
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}
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}
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