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Make to text line endings consistent for list (streams) (#14166)

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# Description
Fixes #14151 where `to text` treats list streams and lists values
differently.

# User-Facing Changes
New line is always added after items in a list or record except for the
last item if the `--no-newline` flag is provided.
This commit is contained in:
Ian Manske 2024-11-05 00:33:54 -08:00 committed by GitHub
parent e87a35104a
commit 62198a29c2
No known key found for this signature in database
GPG Key ID: B5690EEEBB952194
2 changed files with 93 additions and 32 deletions
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68
crates/nu-command/src/formats/to/text.rs
View File

@ -3,6 +3,7 @@ use nu_engine::command_prelude::*;
use nu_protocol::{
format_duration, format_filesize_from_conf, ByteStream, Config, PipelineMetadata,
};
use std::io::Write;
const LINE_ENDING: &str = if cfg!(target_os = "windows") {
"\r\n"
@ -40,44 +41,69 @@ impl Command for ToText {
call: &Call,
input: PipelineData,
) -> Result<PipelineData, ShellError> {
let span = call.head;
let head = call.head;
let no_newline = call.has_flag(engine_state, stack, "no-newline")?;
let input = input.try_expand_range()?;
let config = stack.get_config(engine_state);
match input {
PipelineData::Empty => Ok(Value::string(String::new(), span)
PipelineData::Empty => Ok(Value::string(String::new(), head)
.into_pipeline_data_with_metadata(update_metadata(None))),
PipelineData::Value(value, ..) => {
let is_compound_type = matches!(value, Value::List { .. } | Value::Record { .. });
let add_trailing = !no_newline
&& match &value {
Value::List { vals, .. } => !vals.is_empty(),
Value::Record { val, .. } => !val.is_empty(),
_ => false,
};
let mut str = local_into_string(value, LINE_ENDING, &config);
if is_compound_type && !no_newline {
if add_trailing {
str.push_str(LINE_ENDING);
}
Ok(
Value::string(str, span)
Value::string(str, head)
.into_pipeline_data_with_metadata(update_metadata(None)),
)
}
PipelineData::ListStream(stream, meta) => {
let span = stream.span();
let iter = stream.into_inner().map(move |value| {
let mut str = local_into_string(value, LINE_ENDING, &config);
if !no_newline {
str.push_str(LINE_ENDING);
}
str
});
Ok(PipelineData::ByteStream(
ByteStream::from_iter(
iter,
let stream = if no_newline {
let mut first = true;
let mut iter = stream.into_inner();
ByteStream::from_fn(
span,
engine_state.signals().clone(),
ByteStreamType::String,
),
update_metadata(meta),
))
move |buf| {
let Some(val) = iter.next() else {
return Ok(false);
};
if first {
first = false;
} else {
write!(buf, "{LINE_ENDING}").err_span(head)?;
}
// TODO: write directly into `buf` instead of creating an intermediate
// string.
let str = local_into_string(val, LINE_ENDING, &config);
write!(buf, "{str}").err_span(head)?;
Ok(true)
},
)
} else {
ByteStream::from_iter(
stream.into_inner().map(move |val| {
let mut str = local_into_string(val, LINE_ENDING, &config);
str.push_str(LINE_ENDING);
str
}),
span,
engine_state.signals().clone(),
ByteStreamType::String,
)
};
Ok(PipelineData::ByteStream(stream, update_metadata(meta)))
}
PipelineData::ByteStream(stream, meta) => {
Ok(PipelineData::ByteStream(stream, update_metadata(meta)))
@ -88,12 +114,12 @@ impl Command for ToText {
fn examples(&self) -> Vec<Example> {
vec![
Example {
description: "Outputs data as simple text with a newline",
description: "Outputs data as simple text with a trailing newline",
example: "[1] | to text",
result: Some(Value::test_string("1".to_string() + LINE_ENDING)),
},
Example {
description: "Outputs data as simple text without a newline",
description: "Outputs data as simple text without a trailing newline",
example: "[1] | to text --no-newline",
result: Some(Value::test_string("1")),
},

57
crates/nu-command/tests/commands/to_text.rs
View File

@ -1,19 +1,54 @@
use nu_test_support::nu;
#[test]
fn list_to_text() {
let actual = nu!(r#"["foo" "bar" "baz"] | to text"#);
const LINE_LEN: usize = if cfg!(target_os = "windows") { 2 } else { 1 };
// these actually have newlines between them in the real world but nu! strips newlines, grr
assert_eq!(actual.out, "foobarbaz");
#[test]
fn list() {
// Using `str length` since nu! strips newlines, grr
let actual = nu!(r#"[] | to text | str length"#);
assert_eq!(actual.out, "0");
let actual = nu!(r#"[a] | to text | str length"#);
assert_eq!(actual.out, (1 + LINE_LEN).to_string());
let actual = nu!(r#"[a b] | to text | str length"#);
assert_eq!(actual.out, (2 * (1 + LINE_LEN)).to_string());
}
// the output should be the same when `to text` gets a ListStream instead of a Value::List
// The output should be the same when `to text` gets a ListStream instead of a Value::List.
#[test]
fn list_stream_to_text() {
// use `each` to convert the list to a ListStream
let actual = nu!(r#"["foo" "bar" "baz"] | each {|i| $i} | to text"#);
fn list_stream() {
let actual = nu!(r#"[] | each {} | to text | str length"#);
assert_eq!(actual.out, "0");
// these actually have newlines between them in the real world but nu! strips newlines, grr
assert_eq!(actual.out, "foobarbaz");
let actual = nu!(r#"[a] | each {} | to text | str length"#);
assert_eq!(actual.out, (1 + LINE_LEN).to_string());
let actual = nu!(r#"[a b] | each {} | to text | str length"#);
assert_eq!(actual.out, (2 * (1 + LINE_LEN)).to_string());
}
#[test]
fn list_no_newline() {
let actual = nu!(r#"[] | to text -n | str length"#);
assert_eq!(actual.out, "0");
let actual = nu!(r#"[a] | to text -n | str length"#);
assert_eq!(actual.out, "1");
let actual = nu!(r#"[a b] | to text -n | str length"#);
assert_eq!(actual.out, (2 + LINE_LEN).to_string());
}
// The output should be the same when `to text` gets a ListStream instead of a Value::List.
#[test]
fn list_stream_no_newline() {
let actual = nu!(r#"[] | each {} | to text -n | str length"#);
assert_eq!(actual.out, "0");
let actual = nu!(r#"[a] | each {} | to text -n | str length"#);
assert_eq!(actual.out, "1");
let actual = nu!(r#"[a b] | each {} | to text -n | str length"#);
assert_eq!(actual.out, (2 + LINE_LEN).to_string());
}