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4b301710d3
# Description
Use `record!` macro instead of defining two separate `vec!` for `cols`
and `vals` when appropriate.
This visually aligns the key with the value.
Further more you don't have to deal with the construction of `Record {
cols, vals }` so we can hide the implementation details in the future.
## State
Not covering all possible commands yet, also some tests/examples are
better expressed by creating cols and vals separately.
# User/Developer-Facing Changes
The examples and tests should read more natural. No relevant functional
change
# Bycatch
Where I noticed it I replaced usage of `Value` constructors with
`Span::test_data()` or `Span::unknown()` to the `Value::test_...`
constructors. This should make things more readable and also simplify
changes to the `Span` system in the future.
61 lines
1.6 KiB
Rust
61 lines
1.6 KiB
Rust
use chrono_tz::TZ_VARIANTS;
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use nu_protocol::ast::Call;
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use nu_protocol::engine::{Command, EngineState, Stack};
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use nu_protocol::{
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record, Category, Example, IntoInterruptiblePipelineData, PipelineData, ShellError, Signature,
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Type, Value,
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};
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#[derive(Clone)]
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pub struct SubCommand;
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impl Command for SubCommand {
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fn name(&self) -> &str {
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"date list-timezone"
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}
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fn signature(&self) -> Signature {
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Signature::build("date list-timezone")
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.input_output_types(vec![(Type::Nothing, Type::Table(vec![]))])
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.category(Category::Date)
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}
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fn usage(&self) -> &str {
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"List supported time zones."
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}
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fn search_terms(&self) -> Vec<&str> {
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vec!["UTC", "GMT", "tz"]
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}
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fn run(
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&self,
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engine_state: &EngineState,
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_stack: &mut Stack,
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call: &Call,
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_input: PipelineData,
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) -> Result<PipelineData, ShellError> {
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let span = call.head;
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Ok(TZ_VARIANTS
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.iter()
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.map(move |x| {
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Value::record(
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record! { "timezone" => Value::string(x.name(), span) },
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span,
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)
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})
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.into_pipeline_data(engine_state.ctrlc.clone()))
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}
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fn examples(&self) -> Vec<Example> {
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vec![Example {
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example: "date list-timezone | where timezone =~ Shanghai",
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description: "Show timezone(s) that contains 'Shanghai'",
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result: Some(Value::test_list(vec![Value::test_record(record! {
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"timezone" => Value::test_string("Asia/Shanghai"),
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})])),
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}]
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}
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}
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