forked from extern/nushell
92 lines
2.7 KiB
Rust
92 lines
2.7 KiB
Rust
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, IntoInterruptiblePipelineData, PipelineData, ShellError, Signature, Value,
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};
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const NEWLINE_ESCAPE_CODE: &str = "<\\n>";
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fn decode_newlines(escaped: &str) -> String {
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escaped.replace(NEWLINE_ESCAPE_CODE, "\n")
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}
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#[derive(Clone)]
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pub struct History;
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impl Command for History {
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fn name(&self) -> &str {
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"history"
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}
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fn usage(&self) -> &str {
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"Get the command history"
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}
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fn signature(&self) -> nu_protocol::Signature {
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Signature::build("history")
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.switch("clear", "Clears out the history entries", Some('c'))
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.category(Category::Core)
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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<nu_protocol::PipelineData, nu_protocol::ShellError> {
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let head = call.head;
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if let Some(config_path) = nu_path::config_dir() {
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let clear = call.has_flag("clear");
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let ctrlc = engine_state.ctrlc.clone();
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let mut history_path = config_path;
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history_path.push("nushell");
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history_path.push("history.txt");
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if clear {
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let _ = std::fs::remove_file(history_path);
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Ok(PipelineData::new(head))
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} else {
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let contents = std::fs::read_to_string(history_path);
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if let Ok(contents) = contents {
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Ok(contents
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.lines()
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.map(move |x| Value::String {
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val: decode_newlines(x),
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span: head,
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})
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.collect::<Vec<_>>()
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.into_iter()
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.into_pipeline_data(ctrlc))
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} else {
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Err(ShellError::FileNotFound(head))
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}
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}
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} else {
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Err(ShellError::FileNotFound(head))
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}
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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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example: "history | length",
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description: "Get current history length",
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result: None,
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},
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Example {
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example: "history | last 5",
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description: "Show last 5 commands you have ran",
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result: None,
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},
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Example {
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example: "history | wrap cmd | where cmd =~ cargo",
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description: "Search all the commands from history that contains 'cargo'",
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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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