mirror of
https://github.com/nushell/nushell
synced 2025-01-10 04:09:09 +00:00
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`).
60 lines
1.5 KiB
Rust
60 lines
1.5 KiB
Rust
use crate::commands::WholeStreamCommand;
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use crate::prelude::*;
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use log::trace;
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use nu_errors::ShellError;
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use nu_protocol::{Evaluate, Scope, Signature, SyntaxShape};
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pub struct SkipWhile;
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#[derive(Deserialize)]
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pub struct SkipWhileArgs {
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condition: Evaluate,
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}
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impl WholeStreamCommand for SkipWhile {
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fn name(&self) -> &str {
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"skip-while"
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}
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fn signature(&self) -> Signature {
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Signature::build("skip-while")
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.required(
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"condition",
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SyntaxShape::Block,
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"the condition that must be met to continue skipping",
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)
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.filter()
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}
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fn usage(&self) -> &str {
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"Skips rows while the condition matches."
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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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args.process(registry, skip_while)?.run()
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}
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}
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pub fn skip_while(
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SkipWhileArgs { condition }: SkipWhileArgs,
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RunnableContext { input, .. }: RunnableContext,
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) -> Result<OutputStream, ShellError> {
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let objects = input.values.skip_while(move |item| {
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trace!("ITEM = {:?}", item);
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let result = condition.invoke(&Scope::new(item.clone()));
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trace!("RESULT = {:?}", result);
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let return_value = match result {
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Ok(ref v) if v.is_true() => true,
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_ => false,
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};
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futures::future::ready(return_value)
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});
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Ok(objects.from_input_stream())
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}
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