add bashism !term to prefix search for last command beginning with term (#779)

* add bashism `!term` to prefix search for last command beginning with `term`

* missed doc comment

* one more try with doc comments

* add ability to search session first, then globally

* unrelates types for list_menu test

* missed on

Author: fdncred

.typos.toml

@@ -11,3 +11,10 @@ descriptio = "descriptio"
 ot = "ot"
 # for sqlite backed history
 wheres = "wheres"
+# for list_menu tests
+an1other = "an1other"
+ver2y = "ver2y"
+l3ine = "l3ine"
+4should = "4should"
+wr5ap = "wr5ap"
+ine = "ine"

src/engine.rs

@@ -1495,6 +1495,8 @@ impl Reedline {
     fn parse_bang_command(&mut self) -> Option<ReedlineEvent> {
         let buffer = self.editor.get_buffer();
         let parsed = parse_selection_char(buffer, '!');
+        let parsed_prefix = parsed.prefix.unwrap_or_default().to_string();
+        let parsed_marker = parsed.marker.unwrap_or_default().to_string();
 
         if let Some(last) = parsed.remainder.chars().last() {
             if last != ' ' {
@@ -1546,6 +1548,44 @@ impl Reedline {
                             history.command_line.clone(),
                         )
                     }),
+                ParseAction::BackwardPrefixSearch => {
+                    let history_search_by_session = self
+                        .history
+                        .search(SearchQuery::last_with_prefix_and_cwd(
+                            parsed.prefix.unwrap().to_string(),
+                            self.get_history_session_id(),
+                        ))
+                        .unwrap_or_else(|_| Vec::new())
+                        .get(index.saturating_sub(1))
+                        .map(|history| {
+                            (
+                                parsed.remainder.len(),
+                                parsed_prefix.len() + parsed_marker.len(),
+                                history.command_line.clone(),
+                            )
+                        });
+                    // If we don't find any history searching by session id, then let's
+                    // search everything, otherwise use the result from the session search
+                    if history_search_by_session.is_none() {
+                        eprintln!("Using global search");
+                        self.history
+                            .search(SearchQuery::last_with_prefix(
+                                parsed_prefix.clone(),
+                                self.get_history_session_id(),
+                            ))
+                            .unwrap_or_else(|_| Vec::new())
+                            .get(index.saturating_sub(1))
+                            .map(|history| {
+                                (
+                                    parsed.remainder.len(),
+                                    parsed_prefix.len() + parsed_marker.len(),
+                                    history.command_line.clone(),
+                                )
+                            })
+                    } else {
+                        history_search_by_session
+                    }
+                }
                 ParseAction::ForwardSearch => self
                     .history
                     .search(SearchQuery {
@@ -1573,6 +1613,7 @@ impl Reedline {
                     )))
                     .unwrap_or_else(|_| Vec::new())
                     .first()
+                    //BUGBUG: This returns the wrong results with paths with spaces in them
                     .and_then(|history| history.command_line.split_whitespace().next_back())
                     .map(|token| (parsed.remainder.len(), indicator.len(), token.to_string())),
             });

src/menu/menu_functions.rs

@@ -17,6 +17,8 @@ pub struct ParseResult<'buffer> {
     pub marker: Option<&'buffer str>,
     /// Direction of the search based on the marker
     pub action: ParseAction,
+    /// Prefix to search for
+    pub prefix: Option<&'buffer str>,
 }
 
 /// Direction of the index found in the string
@@ -30,6 +32,8 @@ pub enum ParseAction {
     LastToken,
     /// Last executed command.
     LastCommand,
+    /// Backward search for a prefix
+    BackwardPrefixSearch,
 }
 
 /// Splits a string that contains a marker character
@@ -46,7 +50,8 @@ pub enum ParseAction {
 ///         remainder: "this is an example",
 ///         index: Some(10),
 ///         marker: Some("!10"),
-///         action: ParseAction::ForwardSearch
+///         action: ParseAction::ForwardSearch,
+///         prefix: None,
 ///     }
 /// )
 ///
@@ -58,6 +63,7 @@ pub fn parse_selection_char(buffer: &str, marker: char) -> ParseResult {
             index: None,
             marker: None,
             action: ParseAction::ForwardSearch,
+            prefix: None,
         };
     }
 
@@ -75,6 +81,7 @@ pub fn parse_selection_char(buffer: &str, marker: char) -> ParseResult {
                         index: Some(0),
                         marker: Some(&buffer[index..index + 2 * marker.len_utf8()]),
                         action: ParseAction::LastCommand,
+                        prefix: None,
                     }
                 }
                 #[cfg(feature = "bashisms")]
@@ -84,6 +91,7 @@ pub fn parse_selection_char(buffer: &str, marker: char) -> ParseResult {
                         index: Some(0),
                         marker: Some(&buffer[index..index + 2]),
                         action: ParseAction::LastToken,
+                        prefix: None,
                     }
                 }
                 Some(&x) if x.is_ascii_digit() || x == '-' => {
@@ -106,6 +114,7 @@ pub fn parse_selection_char(buffer: &str, marker: char) -> ParseResult {
                                 index: Some(count),
                                 marker: Some(&buffer[index..index + size]),
                                 action,
+                                prefix: None,
                             };
                         }
                     }
@@ -114,14 +123,26 @@ pub fn parse_selection_char(buffer: &str, marker: char) -> ParseResult {
                         index: Some(count),
                         marker: Some(&buffer[index..index + size]),
                         action,
+                        prefix: None,
                     };
                 }
+                #[cfg(feature = "bashisms")]
+                Some(&x) if x.is_ascii_alphabetic() => {
+                    return ParseResult {
+                        remainder: &buffer[0..index],
+                        index: Some(0),
+                        marker: Some(&buffer[index..index + marker.len_utf8()]),
+                        action: ParseAction::BackwardPrefixSearch,
+                        prefix: Some(&buffer[index + marker.len_utf8()..buffer.len()]),
+                    }
+                }
                 None => {
                     return ParseResult {
                         remainder: &buffer[0..index],
                         index: Some(0),
                         marker: Some(&buffer[index..buffer.len()]),
                         action,
+                        prefix: Some(&buffer[index..buffer.len()]),
                     }
                 }
                 _ => {}
@@ -135,6 +156,7 @@ pub fn parse_selection_char(buffer: &str, marker: char) -> ParseResult {
         index: None,
         marker: None,
         action,
+        prefix: None,
     }
 }