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c42b588782
* Revert "History, more test coverage improvements, and refactorings. (#3217)"
This reverts commit 8fc8fc89aa.
* Add tests
* Refactor .nu-env
* Change logic of Config write to logic of read()
* Fix reload always appends to old vars
* Fix reload always takes last_modified of global config
* Add reload_config in evaluation context
* Reload config after writing to it in cfg set / cfg set_into
* Add --no-history to cli options
* Use --no-history in tests
* Add comment about maybe_print_errors
* Get ctrl_exit var from context.global_config
* Use context.global_config in command "config"
* Add Readme in engine how env vars are now handled
* Update docs from autoenv command
* Move history_path from engine to nu_data
* Move load history out of if
* No let before return
* Add import for indexmap
105 lines
3.1 KiB
Rust
105 lines
3.1 KiB
Rust
use crate::commands::math::reducers::{reducer_for, Reduce};
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use crate::commands::math::utils::run_with_function;
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use crate::prelude::*;
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use nu_engine::WholeStreamCommand;
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use nu_errors::ShellError;
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use nu_protocol::{Primitive, Signature, UntaggedValue, Value};
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pub struct SubCommand;
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#[async_trait]
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impl WholeStreamCommand for SubCommand {
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fn name(&self) -> &str {
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"math product"
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}
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fn signature(&self) -> Signature {
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Signature::build("math product")
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}
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fn usage(&self) -> &str {
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"Finds the product of a list of numbers or tables"
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}
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async fn run(&self, args: CommandArgs) -> Result<OutputStream, ShellError> {
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run_with_function(RunnableContext::from_command_args(args), product).await
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}
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fn examples(&self) -> Vec<Example> {
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vec![Example {
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description: "Get the product of a list of numbers",
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example: "echo [2 3 3 4] | math product",
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result: Some(vec![UntaggedValue::int(72).into()]),
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}]
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}
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}
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fn to_byte(value: &Value) -> Option<Value> {
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match &value.value {
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UntaggedValue::Primitive(Primitive::Int(num)) => {
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Some(UntaggedValue::Primitive(Primitive::Filesize(num.clone())).into_untagged_value())
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}
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_ => None,
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}
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}
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/// Calculate product of given values
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pub fn product(values: &[Value], name: &Tag) -> Result<Value, ShellError> {
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let prod = reducer_for(Reduce::Product);
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let first = values.get(0).ok_or_else(|| {
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ShellError::unexpected("Cannot perform aggregate math operation on empty data")
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})?;
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match first {
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v if v.is_filesize() => to_byte(&prod(
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UntaggedValue::int(1).into_untagged_value(),
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values
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.iter()
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.map(|v| match v {
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Value {
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value: UntaggedValue::Primitive(Primitive::Filesize(num)),
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..
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} => UntaggedValue::int(num.clone()).into_untagged_value(),
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other => other.clone(),
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})
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.collect::<Vec<_>>(),
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)?)
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.ok_or_else(|| {
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ShellError::labeled_error(
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"could not convert to decimal",
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"could not convert to decimal",
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&name.span,
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)
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}),
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v if v.is_none() => prod(
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UntaggedValue::int(1).into_untagged_value(),
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values
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.iter()
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.map(|v| match v {
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Value {
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value: UntaggedValue::Primitive(Primitive::Nothing),
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..
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} => UntaggedValue::int(1).into_untagged_value(),
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other => other.clone(),
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})
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.collect::<Vec<_>>(),
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),
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_ => prod(UntaggedValue::int(1).into_untagged_value(), values.to_vec()),
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}
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}
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#[cfg(test)]
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mod tests {
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use super::ShellError;
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use super::SubCommand;
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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(SubCommand {})
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}
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}
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