Bind fuzzy history search to Ctrl-R

Cargo.lock

@@ -1566,6 +1566,7 @@ dependencies = [
  "serde_urlencoded 0.6.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde_yaml 0.8.9 (registry+https://github.com/rust-lang/crates.io-index)",
  "shellexpand 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "sublime_fuzzy 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "subprocess 0.1.18 (registry+https://github.com/rust-lang/crates.io-index)",
  "surf 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "syntect 3.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -2443,6 +2444,11 @@ name = "strsim"
 version = "0.8.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
+[[package]]
+name = "sublime_fuzzy"
+version = "0.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
 [[package]]
 name = "subprocess"
 version = "0.1.18"
@@ -3247,6 +3253,7 @@ dependencies = [
 "checksum stackvector 1.0.6 (registry+https://github.com/rust-lang/crates.io-index)" = "1c4725650978235083241fab0fdc8e694c3de37821524e7534a1a9061d1068af"
 "checksum static_assertions 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)" = "b4f8de36da215253eb5f24020bfaa0646613b48bf7ebe36cdfa37c3b3b33b241"
 "checksum strsim 0.8.0 (registry+https://github.com/rust-lang/crates.io-index)" = "8ea5119cdb4c55b55d432abb513a0429384878c15dde60cc77b1c99de1a95a6a"
+"checksum sublime_fuzzy 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)" = "97bd7ad698ea493a3a7f60c2ffa117c234f341e09f8cc2d39cef10cdde077acf"
 "checksum subprocess 0.1.18 (registry+https://github.com/rust-lang/crates.io-index)" = "28fc0f40f0c0da73339d347aa7d6d2b90341a95683a47722bc4eebed71ff3c00"
 "checksum surf 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)" = "018eed64aede455beb88505d50c5c64882bebbe0996d4b660c272e3d8bb6f883"
 "checksum syn 0.15.43 (registry+https://github.com/rust-lang/crates.io-index)" = "ee06ea4b620ab59a2267c6b48be16244a3389f8bfa0986bdd15c35b890b00af3"

Cargo.toml

@@ -73,6 +73,7 @@ num-bigint = { version = "0.2.3", features = ["serde"] }
 bigdecimal = { version = "0.1.0", features = ["serde"] }
 natural = "0.3.0"
 serde_urlencoded = "0.6.1"
+sublime_fuzzy = "0.5"
 
 neso = { version = "0.5.0", optional = true }
 crossterm = { version = "0.10.2", optional = true }

src/cli.rs

@@ -10,6 +10,7 @@ use crate::context::Context;
 use crate::data::Value;
 pub(crate) use crate::errors::ShellError;
 use crate::git::current_branch;
+use crate::histsearch;
 use crate::parser::registry::Signature;
 use crate::parser::{hir, CallNode, Pipeline, PipelineElement, TokenNode};
 use crate::prelude::*;
@@ -333,6 +334,12 @@ pub async fn cli() -> Result<(), Box<dyn Error>> {
 
         rl.set_edit_mode(edit_mode);
 
+        // Register Ctrl-r for history fuzzy search
+        // rustyline doesn't support custom commands, so we override Ctrl-D (EOF)
+        rl.bind_sequence(rustyline::KeyPress::Ctrl('R'), rustyline::Cmd::EndOfFile);
+        // Redefine Ctrl-D to same command as Ctrl-C
+        rl.bind_sequence(rustyline::KeyPress::Ctrl('D'), rustyline::Cmd::Interrupt);
+
         let readline = rl.readline(&format!(
             "{}{}> ",
             cwd,
@@ -347,6 +354,12 @@ pub async fn cli() -> Result<(), Box<dyn Error>> {
                 rl.add_history_entry(line.clone());
             }
 
+            LineResult::SearchHist => {
+                let hist = std::fs::read_to_string("history.txt").expect("Cannot open history.txt");
+                let lines = hist.lines().rev().collect();
+                histsearch::select_from_list(&lines);
+            }
+
             LineResult::CtrlC => {
                 if ctrlcbreak {
                     std::process::exit(0);
@@ -390,6 +403,7 @@ pub async fn cli() -> Result<(), Box<dyn Error>> {
 
 enum LineResult {
     Success(String),
+    SearchHist,
     Error(String, ShellError),
     CtrlC,
     Break,
@@ -517,7 +531,7 @@ async fn process_line(readline: Result<String, ReadlineError>, ctx: &mut Context
             LineResult::Success(line.clone())
         }
         Err(ReadlineError::Interrupted) => LineResult::CtrlC,
-        Err(ReadlineError::Eof) => LineResult::Break,
+        Err(ReadlineError::Eof) => LineResult::SearchHist, // Override LineResult::Break
         Err(err) => {
             println!("Error: {:?}", err);
             LineResult::Break

src/histsearch.rs

@@ -3,7 +3,7 @@ use crossterm::{cursor, terminal, ClearType, InputEvent, KeyEvent, RawScreen};
 use std::io::Write;
 use sublime_fuzzy::best_match;
 
-fn select_from_list(lines: &Vec<&str>) {
+pub fn select_from_list(lines: &Vec<&str>) {
     const MAX_RESULTS: usize = 5;
     #[derive(PartialEq)]
     enum State {
@@ -163,9 +163,3 @@ fn paint_selection_list(lines: &Vec<&str>, selected: usize) {
     // Clear additional lines from previous selection
     terminal().clear(ClearType::FromCursorDown).unwrap();
 }
-
-fn main() {
-    let hist = std::fs::read_to_string("history.txt").expect("Cannot open history.txt");
-    let lines = hist.lines().rev().collect();
-    select_from_list(&lines);
-}

src/lib.rs

@@ -13,6 +13,7 @@ mod errors;
 mod evaluate;
 mod format;
 mod git;
+mod histsearch;
 mod parser;
 mod plugin;
 mod shell;