forked from extern/nushell
522a828687
* 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>
78 lines
2.4 KiB
Rust
78 lines
2.4 KiB
Rust
use crate::commands::WholeStreamCommand;
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use crate::data::value::format_leaf;
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use crate::prelude::*;
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use futures::StreamExt;
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use nu_errors::ShellError;
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use nu_protocol::{ReturnSuccess, Signature, UntaggedValue, Value};
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pub struct ToMarkdown;
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impl WholeStreamCommand for ToMarkdown {
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fn name(&self) -> &str {
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"to-md"
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}
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fn signature(&self) -> Signature {
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Signature::build("to-md")
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}
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fn usage(&self) -> &str {
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"Convert table into simple Markdown"
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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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to_html(args, registry)
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}
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}
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fn to_html(args: CommandArgs, registry: &CommandRegistry) -> Result<OutputStream, ShellError> {
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let args = args.evaluate_once(registry)?;
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let name_tag = args.name_tag();
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//let name_span = name_tag.span;
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let stream = async_stream! {
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let input: Vec<Value> = args.input.collect().await;
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let headers = nu_protocol::merge_descriptors(&input);
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let mut output_string = String::new();
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if !headers.is_empty() && (headers.len() > 1 || headers[0] != "<value>") {
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output_string.push_str("|");
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for header in &headers {
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output_string.push_str(&htmlescape::encode_minimal(&header));
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output_string.push_str("|");
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}
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output_string.push_str("\n|");
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for _ in &headers {
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output_string.push_str("-");
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output_string.push_str("|");
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}
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output_string.push_str("\n");
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}
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for row in input {
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match row.value {
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UntaggedValue::Row(row) => {
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output_string.push_str("|");
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for header in &headers {
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let data = row.get_data(header);
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output_string.push_str(&format_leaf(data.borrow()).plain_string(100_000));
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output_string.push_str("|");
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}
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output_string.push_str("\n");
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}
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p => {
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output_string.push_str(&(htmlescape::encode_minimal(&format_leaf(&p).plain_string(100_000))));
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output_string.push_str("\n");
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}
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}
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}
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yield ReturnSuccess::value(UntaggedValue::string(output_string).into_value(name_tag));
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};
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Ok(stream.to_output_stream())
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}
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