forked from extern/nushell
e4226def16
This commit extracts five new crates:
- nu-source, which contains the core source-code handling logic in Nu,
including Text, Span, and also the pretty.rs-based debug logic
- nu-parser, which is the parser and expander logic
- nu-protocol, which is the bulk of the types and basic conveniences
used by plugins
- nu-errors, which contains ShellError, ParseError and error handling
conveniences
- nu-textview, which is the textview plugin extracted into a crate
One of the major consequences of this refactor is that it's no longer
possible to `impl X for Spanned<Y>` outside of the `nu-source` crate, so
a lot of types became more concrete (Value became a concrete type
instead of Spanned<Value>, for example).
This also turned a number of inherent methods in the main nu crate into
plain functions (impl Value {} became a bunch of functions in the
`value` namespace in `crate::data::value`).
79 lines
2.2 KiB
Rust
79 lines
2.2 KiB
Rust
use crate::commands::WholeStreamCommand;
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use crate::prelude::*;
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use nu_protocol::{Primitive, Signature, SyntaxShape, UntaggedValue, Value};
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use nu_errors::ShellError;
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pub struct Which;
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impl WholeStreamCommand for Which {
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fn name(&self) -> &str {
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"which"
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}
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fn signature(&self) -> Signature {
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Signature::build("which").required(
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"name",
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SyntaxShape::Any,
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"the name of the command to find the path to",
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)
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}
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fn usage(&self) -> &str {
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"Finds a program file."
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}
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fn run(
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&self,
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args: CommandArgs,
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registry: &CommandRegistry,
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) -> Result<OutputStream, ShellError> {
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which(args, registry)
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}
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}
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pub fn which(args: CommandArgs, registry: &CommandRegistry) -> Result<OutputStream, ShellError> {
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let args = args.evaluate_once(registry)?;
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let mut which_out = VecDeque::new();
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let tag = args.call_info.name_tag.clone();
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if let Some(v) = &args.call_info.args.positional {
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if v.len() > 0 {
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match &v[0] {
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Value {
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value: UntaggedValue::Primitive(Primitive::String(s)),
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tag,
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} => match which::which(&s) {
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Ok(ok) => {
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which_out.push_back(
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UntaggedValue::Primitive(Primitive::Path(ok)).into_value(tag.clone()),
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);
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}
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_ => {}
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},
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Value { tag, .. } => {
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return Err(ShellError::labeled_error(
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"Expected a filename to find",
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"needs a filename",
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tag,
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));
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}
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}
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} else {
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return Err(ShellError::labeled_error(
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"Expected a binary to find",
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"needs application name",
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tag,
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));
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}
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} else {
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return Err(ShellError::labeled_error(
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"Expected a binary to find",
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"needs application name",
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tag,
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));
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}
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Ok(which_out.to_output_stream())
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}
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