fix: Make reader and writer mutable in FilterPlugin and implementations

Co-authored-by: aider (openai/andrew/openrouter/deepseek/deepseek-chat-v3.1) <aider@aider.chat>

src/filter_plugin/grep.rs

@@ -17,7 +17,7 @@ impl GrepFilter {
 }
 
 impl FilterPlugin for GrepFilter {
-    fn filter(&mut self, reader: Box<&mut dyn Read>, writer: Box<&mut dyn Write>) -> Result<()> {
+    fn filter(&mut self, mut reader: Box<&mut dyn Read>, mut writer: Box<&mut dyn Write>) -> Result<()> {
         let mut buf_reader = std::io::BufReader::new(&mut *reader);
         for line in buf_reader.by_ref().lines() {
             let line = line?;

src/filter_plugin/head.rs

@@ -15,7 +15,7 @@ impl HeadBytesFilter {
 }
 
 impl FilterPlugin for HeadBytesFilter {
-    fn filter(&mut self, reader: Box<&mut dyn Read>, writer: Box<&mut dyn Write>) -> Result<()> {
+    fn filter(&mut self, mut reader: Box<&mut dyn Read>, mut writer: Box<&mut dyn Write>) -> Result<()> {
         if self.remaining == 0 {
             return Ok(());
         }
@@ -47,7 +47,7 @@ impl HeadLinesFilter {
 }
 
 impl FilterPlugin for HeadLinesFilter {
-    fn filter(&mut self, reader: Box<&mut dyn Read>, writer: Box<&mut dyn Write>) -> Result<()> {
+    fn filter(&mut self, mut reader: Box<&mut dyn Read>, mut writer: Box<&mut dyn Write>) -> Result<()> {
         if self.remaining == 0 {
             return Ok(());
         }

src/filter_plugin/mod.rs

@@ -8,7 +8,7 @@ pub mod strip_ansi;
 pub mod utils;
 
 pub trait FilterPlugin: Send {
-    fn filter(&mut self, reader: Box<&mut dyn Read>, writer: Box<&mut dyn Write>) -> Result<()>;
+    fn filter(&mut self, mut reader: Box<&mut dyn Read>, mut writer: Box<&mut dyn Write>) -> Result<()>;
 }
 
 pub struct FilterChain {
@@ -44,16 +44,16 @@ impl FilterChain {
         for i in 0..plugins_len {
             // Create a cursor for the current data
             let mut cursor = std::io::Cursor::new(&current_data);
-            let mut input: Box<&mut dyn Read> = Box::new(&mut cursor);
+            let input: Box<&mut dyn Read> = Box::new(&mut cursor);
             
             // For the last plugin, write directly to the output writer
             if i == plugins_len - 1 {
-                let mut output: Box<&mut dyn Write> = Box::new(writer);
+                let output: Box<&mut dyn Write> = Box::new(writer);
                 self.plugins[i].filter(input, output)?;
             } else {
                 // For intermediate plugins, write to a buffer
                 let mut output = Vec::new();
-                let mut output_ref: Box<&mut dyn Write> = Box::new(&mut output);
+                let output_ref: Box<&mut dyn Write> = Box::new(&mut output);
                 self.plugins[i].filter(input, output_ref)?;
                 current_data = output;
             }

src/filter_plugin/skip.rs

@@ -15,7 +15,7 @@ impl SkipBytesFilter {
 }
 
 impl FilterPlugin for SkipBytesFilter {
-    fn filter(&mut self, reader: Box<&mut dyn Read>, writer: Box<&mut dyn Write>) -> Result<()> {
+    fn filter(&mut self, mut reader: Box<&mut dyn Read>, mut writer: Box<&mut dyn Write>) -> Result<()> {
         // Skip bytes in chunks
         if self.remaining > 0 {
             let mut buffer = vec![0; PIPESIZE];
@@ -48,7 +48,7 @@ impl SkipLinesFilter {
 }
 
 impl FilterPlugin for SkipLinesFilter {
-    fn filter(&mut self, reader: Box<&mut dyn Read>, writer: Box<&mut dyn Write>) -> Result<()> {
+    fn filter(&mut self, mut reader: Box<&mut dyn Read>, mut writer: Box<&mut dyn Write>) -> Result<()> {
         let mut buf_reader = std::io::BufReader::new(&mut *reader);
         for line in buf_reader.by_ref().lines() {
             let line = line?;

src/filter_plugin/strip_ansi.rs

@@ -11,7 +11,7 @@ impl StripAnsiFilter {
 }
 
 impl FilterPlugin for StripAnsiFilter {
-    fn filter(&mut self, reader: Box<&mut dyn Read>, writer: Box<&mut dyn Write>) -> Result<()> {
+    fn filter(&mut self, mut reader: Box<&mut dyn Read>, mut writer: Box<&mut dyn Write>) -> Result<()> {
         let mut ansi_writer = Writer::new(&mut *writer);
         std::io::copy(&mut *reader, &mut ansi_writer)?;
         ansi_writer.flush()

src/filter_plugin/tail.rs

@@ -18,7 +18,7 @@ impl TailBytesFilter {
 }
 
 impl FilterPlugin for TailBytesFilter {
-    fn filter(&mut self, reader: Box<&mut dyn Read>, writer: Box<&mut dyn Write>) -> Result<()> {
+    fn filter(&mut self, mut reader: Box<&mut dyn Read>, mut writer: Box<&mut dyn Write>) -> Result<()> {
         let mut temp_buffer = vec![0; PIPESIZE];
         loop {
             let bytes_read = (&mut *reader).read(&mut temp_buffer)?;
@@ -57,7 +57,7 @@ impl TailLinesFilter {
 }
 
 impl FilterPlugin for TailLinesFilter {
-    fn filter(&mut self, reader: Box<&mut dyn Read>, writer: Box<&mut dyn Write>) -> Result<()> {
+    fn filter(&mut self, mut reader: Box<&mut dyn Read>, mut writer: Box<&mut dyn Write>) -> Result<()> {
         let mut buf_reader = std::io::BufReader::new(&mut *reader);
         for line in buf_reader.by_ref().lines() {
             let line = line?;