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a5c604c283
# Description Working on uniformizing the ending messages regarding methods usage() and extra_usage(). This is related to the issue https://github.com/nushell/nushell/issues/5066 after discussing it with @jntrnr # User-Facing Changes None. # Tests + Formatting Don't forget to add tests that cover your changes. Make sure you've run and fixed any issues with these commands: - `cargo fmt --all -- --check` to check standard code formatting (`cargo fmt --all` applies these changes) - `cargo clippy --workspace -- -D warnings -D clippy::unwrap_used -A clippy::needless_collect` to check that you're using the standard code style - `cargo test --workspace` to check that all tests pass # After Submitting If your PR had any user-facing changes, update [the documentation](https://github.com/nushell/nushell.github.io) after the PR is merged, if necessary. This will help us keep the docs up to date.
91 lines
2.7 KiB
Rust
91 lines
2.7 KiB
Rust
use nu_engine::env_to_string;
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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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Category, Example, IntoPipelineData, PipelineData, ShellError, Signature, Type, Value,
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};
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#[derive(Clone)]
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pub struct Env;
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impl Command for Env {
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fn name(&self) -> &str {
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"env"
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}
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fn usage(&self) -> &str {
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"Display current environment variables."
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}
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fn signature(&self) -> nu_protocol::Signature {
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Signature::build("env")
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.category(Category::Env)
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.input_output_types(vec![(Type::Nothing, Type::Table(vec![]))])
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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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let mut env_vars: Vec<(String, Value)> =
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stack.get_env_vars(engine_state).into_iter().collect();
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env_vars.sort_by(|(name1, _), (name2, _)| name1.cmp(name2));
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let mut values = vec![];
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for (name, val) in env_vars {
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let mut cols = vec![];
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let mut vals = vec![];
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let raw_val = match env_to_string(&name, &val, engine_state, stack) {
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Ok(raw) => Value::string(raw, span),
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Err(ShellError::EnvVarNotAString(..)) => Value::nothing(span),
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Err(e) => return Err(e),
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};
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let val_type = val.get_type();
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cols.push("name".into());
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vals.push(Value::string(name, span));
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cols.push("type".into());
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vals.push(Value::string(format!("{val_type}"), span));
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cols.push("value".into());
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vals.push(val);
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cols.push("raw".into());
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vals.push(raw_val);
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values.push(Value::Record { cols, vals, span });
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}
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Ok(Value::List { vals: values, span }.into_pipeline_data())
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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: "Display current path environment variable",
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example: "env | where name == PATH",
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result: None,
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},
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Example {
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description: "Check whether the env variable `MY_ENV_ABC` exists",
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example: r#"env | any { |e| $e.name == MY_ENV_ABC }"#,
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result: Some(Value::test_bool(false)),
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},
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Example {
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description: "Another way to check whether the env variable `PATH` exists",
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example: r#"'PATH' in (env).name"#,
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result: Some(Value::test_bool(true)),
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},
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]
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}
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}
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