2019-08-19 07:16:39 +02:00
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use crate::commands::WholeStreamCommand;
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2019-09-05 18:23:42 +02:00
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use crate::data::base::reject_fields;
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2019-05-15 23:44:06 +02:00
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use crate::prelude::*;
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Extract core stuff into own crates
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`).
2019-11-26 03:30:48 +01:00
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use nu_errors::ShellError;
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use nu_protocol::{Signature, SyntaxShape};
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2019-11-21 15:33:14 +01:00
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use nu_source::Tagged;
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2019-05-15 23:44:06 +02:00
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2019-08-20 05:15:05 +02:00
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#[derive(Deserialize)]
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pub struct RejectArgs {
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rest: Vec<Tagged<String>>,
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}
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2019-08-19 07:16:39 +02:00
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pub struct Reject;
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impl WholeStreamCommand for Reject {
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fn name(&self) -> &str {
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"reject"
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}
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2019-07-09 06:31:26 +02:00
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2019-08-19 07:16:39 +02:00
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fn signature(&self) -> Signature {
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2020-04-06 09:16:14 +02:00
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Signature::build("reject").rest(SyntaxShape::String, "the names of columns to remove")
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2019-05-22 09:12:03 +02:00
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}
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2019-08-30 00:52:32 +02:00
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fn usage(&self) -> &str {
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"Remove the given columns from the table."
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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, reject)?.run()
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}
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2019-08-19 07:16:39 +02:00
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}
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2019-08-20 05:15:05 +02:00
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fn reject(
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RejectArgs { rest: fields }: RejectArgs,
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2019-08-20 08:11:11 +02:00
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RunnableContext { input, name, .. }: RunnableContext,
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2019-08-20 05:15:05 +02:00
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) -> Result<OutputStream, ShellError> {
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2019-12-06 16:28:26 +01:00
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if fields.is_empty() {
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2019-08-20 08:11:11 +02:00
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return Err(ShellError::labeled_error(
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"Reject requires fields",
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"needs parameter",
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name,
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));
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}
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2019-08-20 05:15:05 +02:00
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let fields: Vec<_> = fields.iter().map(|f| f.item.clone()).collect();
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2019-05-15 23:44:06 +02:00
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Move external closer to internal (#1611)
* Refactor InputStream and affected commands.
First, making `values` private and leaning on the `Stream` implementation makes
consumes of `InputStream` less likely to have to change in the future, if we
change what an `InputStream` is internally.
Second, we're dropping `Option<InputStream>` as the input to pipelines,
internals, and externals. Instead, `InputStream.is_empty` can be used to check
for "emptiness". Empty streams are typically only ever used as the first input
to a pipeline.
* Add run_external internal command.
We want to push external commands closer to internal commands, eventually
eliminating the concept of "external" completely. This means we can consolidate
a couple of things:
- Variable evaluation (for example, `$it`, `$nu`, alias vars)
- Behaviour of whole stream vs per-item external execution
It should also make it easier for us to start introducing argument signatures
for external commands,
* Update run_external.rs
* Update run_external.rs
* Update run_external.rs
* Update run_external.rs
Co-authored-by: Jonathan Turner <jonathandturner@users.noreply.github.com>
2020-04-20 05:30:44 +02:00
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let stream = input.map(move |item| reject_fields(&item, &fields, &item.tag));
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2019-05-15 23:44:06 +02:00
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2019-07-03 22:31:15 +02:00
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Ok(stream.from_input_stream())
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2019-05-15 23:44:06 +02:00
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}
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