Merge nucleic/clever-quartz-marten-uqnx into dev

brush-interactive/src/basic/input_backend.rs

@@ -4,7 +4,7 @@ use brush_core::Shell;
 
 use crate::{
     InputBackend, ShellError, completion,
-    input_backend::{InteractivePrompt, ReadResult},
+    input_backend::{InteractivePrompt, ReadResult, parse_result_is_complete},
 };
 
 use super::{non_term_line_reader, term_line_reader};
@@ -82,18 +82,7 @@ impl BasicInputBackend {
     }
 
     fn is_valid_input(shell: &Shell<impl brush_core::ShellExtensions>, input: &str) -> bool {
-        match shell.parse_string(input.to_owned()) {
-            // Incomplete tokenizing (unclosed quotes, etc.) - need more input
-            Err(brush_parser::ParseError::Tokenizing { inner, position: _ })
-                if inner.is_incomplete() =>
-            {
-                false
-            }
-            // Parse error at end of input - could be incomplete
-            Err(brush_parser::ParseError::ParsingAtEndOfInput) => false,
-            // Parse error at a specific position OR successful parse - complete
-            _ => true,
-        }
+        parse_result_is_complete(&shell.parse_string(input.to_owned()))
     }
 
     fn generate_completions(

brush-interactive/src/input_backend.rs

@@ -49,3 +49,24 @@ pub struct InteractivePrompt {
     /// Prompt to display on a continuation line of input.
     pub continuation_prompt: String,
 }
+
+/// Returns whether a parser result represents a complete command that can be
+/// executed, as opposed to a command that needs more physical input lines.
+pub(crate) fn parse_result_is_complete(
+    result: &Result<brush_parser::ast::Program, brush_parser::ParseError>,
+) -> bool {
+    match result {
+        // Unclosed quotes and similar tokenizer states need another line.
+        Err(brush_parser::ParseError::Tokenizing { inner, position: _ })
+            if inner.is_incomplete() =>
+        {
+            false
+        }
+        // An otherwise-valid compound command may simply be missing its
+        // closing token (`fi`, `done`, `}`, ...).
+        Err(brush_parser::ParseError::ParsingAtEndOfInput) => false,
+        // A located syntax error is complete input and should be surfaced.
+        // A successful parse is ready to execute.
+        _ => true,
+    }
+}

brush-interactive/src/minimal/input_backend.rs

@@ -2,12 +2,21 @@ use std::io::{IsTerminal, Write};
 
 use crate::{
     InputBackend, ShellError,
-    input_backend::{InteractivePrompt, ReadResult},
+    input_backend::{InteractivePrompt, ReadResult, parse_result_is_complete},
 };
 
 /// Represents a minimal shell input backend, capable of taking commands from standard input.
 #[derive(Default)]
-pub struct MinimalInputBackend;
+pub struct MinimalInputBackend {
+    parser_options: brush_parser::ParserOptions,
+}
+
+impl MinimalInputBackend {
+    /// Creates a minimal backend using the shell's active parser options.
+    pub const fn new(parser_options: brush_parser::ParserOptions) -> Self {
+        Self { parser_options }
+    }
+}
 
 impl InputBackend for MinimalInputBackend {
     fn read_line(
@@ -17,12 +26,26 @@ impl InputBackend for MinimalInputBackend {
     ) -> Result<ReadResult, ShellError> {
         self.display_prompt(&prompt)?;
 
-        let result = match Self::read_input_line()? {
-            ReadResult::Input(s) => s,
-            ReadResult::BoundCommand(s) => s,
-            ReadResult::Eof => return Ok(ReadResult::Eof),
+        let mut result = String::new();
+        loop {
+            match Self::read_input_line()? {
+                ReadResult::Input(s) | ReadResult::BoundCommand(s) => {
+                    result.push_str(&s);
+                    if self.is_complete_input(&result) {
+                        break;
+                    }
+                }
+                ReadResult::Eof => {
+                    if result.is_empty() {
+                        return Ok(ReadResult::Eof);
+                    }
+                    // Return the partial command so the normal parser path can
+                    // report the incomplete construct instead of dropping it.
+                    break;
+                }
                 ReadResult::Interrupted => return Ok(ReadResult::Interrupted),
-        };
+            }
+        }
 
         if result.is_empty() {
             Ok(ReadResult::Eof)
@@ -33,6 +56,11 @@ impl InputBackend for MinimalInputBackend {
 }
 
 impl MinimalInputBackend {
+    fn is_complete_input(&self, input: &str) -> bool {
+        let mut parser = brush_parser::Parser::new(input.as_bytes(), &self.parser_options);
+        parse_result_is_complete(&parser.parse_program())
+    }
+
     #[expect(clippy::unused_self)]
     fn should_display_prompt(&self) -> bool {
         std::io::stdin().is_terminal()

brush-shell/src/entry.rs

@@ -307,7 +307,8 @@ async fn run_async(
 
         #[cfg(feature = "minimal")]
         InputBackendType::Minimal => {
-            let mut input_backend = brush_interactive::MinimalInputBackend;
+            let parser_options = shell.lock().await.parser_options();
+            let mut input_backend = brush_interactive::MinimalInputBackend::new(parser_options);
             run_in_shell(&shell, args.clone(), &mut input_backend, &ui_options).await
         }
         #[cfg(not(feature = "minimal"))]