76 lines
2.0 KiB
Rust
76 lines
2.0 KiB
Rust
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::{ReturnSuccess, Signature, UntaggedValue};
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use std::fs::File;
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use std::io::{BufRead, BufReader};
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pub struct History;
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impl WholeStreamCommand for History {
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fn name(&self) -> &str {
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"history"
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}
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fn signature(&self) -> Signature {
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Signature::build("history").switch("clear", "Clears out the history entries", Some('c'))
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}
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fn usage(&self) -> &str {
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"Display command history."
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}
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fn run_with_actions(&self, args: CommandArgs) -> Result<ActionStream, ShellError> {
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history(args)
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}
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}
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fn history(args: CommandArgs) -> Result<ActionStream, ShellError> {
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let tag = args.call_info.name_tag.clone();
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let ctx = EvaluationContext::from_args(&args);
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let args = args.evaluate_once()?;
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let clear = args.has_flag("clear");
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let path = if let Some(global_cfg) = &ctx.configs.lock().global_config {
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nu_data::config::path::history_path_or_default(global_cfg)
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} else {
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nu_data::config::path::default_history_path()
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};
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if clear {
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// This is a NOOP, the logic to clear is handled in cli.rs
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Ok(ActionStream::empty())
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} else if let Ok(file) = File::open(path) {
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let reader = BufReader::new(file);
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// Skips the first line, which is a Rustyline internal
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let output = reader.lines().skip(1).filter_map(move |line| match line {
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Ok(line) => Some(ReturnSuccess::value(
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UntaggedValue::string(line).into_value(tag.clone()),
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)),
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Err(_) => None,
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});
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Ok(output.to_action_stream())
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} else {
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Err(ShellError::labeled_error(
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"Could not open history",
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"history file could not be opened",
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tag,
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))
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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::History;
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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(History {})
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}
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}
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