72 lines
1.7 KiB
Rust
72 lines
1.7 KiB
Rust
use crate::prelude::*;
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use chrono_tz::TZ_VARIANTS;
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use indexmap::IndexMap;
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use nu_engine::WholeStreamCommand;
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use nu_errors::ShellError;
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use nu_protocol::{Dictionary, Signature, UntaggedValue};
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pub struct Date;
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impl WholeStreamCommand for Date {
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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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}
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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 run(&self, args: CommandArgs) -> Result<OutputStream, ShellError> {
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list_timezone(args)
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}
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fn examples(&self) -> Vec<Example> {
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vec![
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Example {
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description: "List all supported time zones",
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example: "date list-timezone",
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result: None,
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},
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Example {
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description: "List all supported European time zones",
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example: "date list-timezone | where timezone =~ Europe",
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result: None,
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},
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]
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}
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}
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fn list_timezone(args: CommandArgs) -> Result<OutputStream, ShellError> {
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let tag = args.call_info.name_tag;
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let list = TZ_VARIANTS.iter().map(move |tz| {
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let mut entries = IndexMap::new();
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entries.insert(
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"timezone".to_string(),
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UntaggedValue::string(tz.name()).into_value(&tag),
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);
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Ok(UntaggedValue::Row(Dictionary { entries }).into_value(&tag))
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});
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Ok(list.into_iter().into_input_stream())
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}
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#[cfg(test)]
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mod tests {
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use super::Date;
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use super::ShellError;
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#[test]
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fn examples_work_as_expected() -> Result<(), ShellError> {
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use crate::examples::test as test_examples;
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test_examples(Date {})
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}
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}
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