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feat: add max_buffer_size to MagicFileMetaPlugin and refactor MetaPluginProgram

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Co-authored-by: aider (openai/andrew/openrouter/anthropic/claude-sonnet-4) <aider@aider.chat>
This commit is contained in:
Andrew Phillips
2025-08-18 07:56:56 -03:00
parent 133538881f
commit c38ae0d4a9
2 changed files with 91 additions and 80 deletions
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62
src/meta_plugin/magic.rs
View File

@@ -1,36 +1,34 @@
use anyhow::Result;
use magic::{Cookie, CookieFlags};
use std::io;
use std::io::Write;
use rusqlite::Connection;
use crate::meta_plugin::MetaPlugin;
#[derive(Debug, Clone)]
#[derive(Debug)]
pub struct MagicFileMetaPlugin {
buffer: Vec<u8>,
max_buffer_size: usize,
is_saved: bool,
item_id: Option<i64>,
conn: Option<*mut Connection>,
cookie: Option<Cookie>,
}
impl MagicFileMetaPlugin {
pub fn new() -> MagicFileMetaPlugin {
MagicFileMetaPlugin {
buffer: Vec::new(),
max_buffer_size: 4096, // Same as BinaryMetaPlugin
is_saved: false,
item_id: None,
conn: None,
cookie: None,
}
}
fn get_magic_result(&self, flags: CookieFlags) -> io::Result<String> {
let cookie = Cookie::open(flags)
.map_err(|e| io::Error::new(io::ErrorKind::Other, format!("Failed to open magic cookie: {}", e)))?;
cookie.load(&[] as &[&str])
.map_err(|e| io::Error::new(io::ErrorKind::Other, format!("Failed to load magic database: {}", e)))?;
if let Some(ref cookie) = self.cookie {
let result = cookie.buffer(&self.buffer)
.map_err(|e| io::Error::new(io::ErrorKind::Other, format!("Failed to analyze buffer: {}", e)))?;
@@ -47,6 +45,12 @@ impl MagicFileMetaPlugin {
};
Ok(cleaned.to_string())
} else {
Err(io::Error::new(
io::ErrorKind::Other,
"Magic cookie not initialized".to_string(),
))
}
}
fn save_all_magic_metadata(&mut self) -> Result<()> {
@@ -94,14 +98,17 @@ impl MetaPlugin for MagicFileMetaPlugin {
true
}
fn create(&self) -> Result<Box<dyn Write>> {
// For meta plugins, we don't actually create a writer since we're buffering data internally
Ok(Box::new(DummyWriter))
}
fn initialize(&mut self, conn: &Connection, item_id: i64) -> Result<()> {
self.item_id = Some(item_id);
self.conn = Some(conn as *const Connection as *mut Connection);
// Initialize magic cookie
let cookie = Cookie::open(CookieFlags::empty())
.map_err(|e| anyhow::anyhow!("Failed to open magic cookie: {}", e))?;
cookie.load(&[] as &[&str])
.map_err(|e| anyhow::anyhow!("Failed to load magic database: {}", e))?;
self.cookie = Some(cookie);
Ok(())
}
@@ -117,7 +124,21 @@ impl MetaPlugin for MagicFileMetaPlugin {
}
fn update(&mut self, data: &[u8]) {
self.buffer.extend_from_slice(data);
// Only collect up to max_buffer_size
let remaining_capacity = self.max_buffer_size.saturating_sub(self.buffer.len());
if remaining_capacity > 0 {
let bytes_to_copy = std::cmp::min(data.len(), remaining_capacity);
self.buffer.extend_from_slice(&data[..bytes_to_copy]);
// Check if we've reached our buffer limit and save if so
if self.buffer.len() >= self.max_buffer_size && !self.is_saved {
if let (Some(conn), Some(item_id)) = (self.conn, self.item_id) {
if let Err(e) = self.save_all_magic_metadata() {
eprintln!("Warning: Failed to save magic metadata early: {}", e);
}
}
}
}
}
fn meta_name(&mut self) -> String {
@@ -125,16 +146,3 @@ impl MetaPlugin for MagicFileMetaPlugin {
}
}
// Dummy writer that implements Write but doesn't do anything
// This is needed to satisfy the MetaPlugin trait requirements
struct DummyWriter;
impl Write for DummyWriter {
fn write(&mut self, buf: &[u8]) -> io::Result<usize> {
Ok(buf.len())
}
fn flush(&mut self) -> io::Result<()> {
Ok(())
}
}

55
src/meta_plugin/program.rs
View File

@@ -1,21 +1,21 @@
use crate::plugins::ProgramWriter;
use anyhow::{Context, Result, anyhow};
use log::*;
use std::io;
use std::io::Write;
use std::process::{Command, Stdio};
use std::process::{Command, Stdio, Child};
use which::which;
use crate::meta_plugin::MetaPlugin;
#[derive(Clone, Debug)]
#[derive(Debug)]
pub struct MetaPluginProgram {
pub program: String,
pub args: Vec<String>,
pub supported: bool,
pub meta_name: String,
pub split_whitespace: bool,
buffer: Vec<u8>,
process: Option<Child>,
writer: Option<Box<dyn Write>>,
}
impl MetaPluginProgram {
@@ -29,7 +29,8 @@ impl MetaPluginProgram {
supported,
meta_name,
split_whitespace,
buffer: Vec::new(),
process: None,
writer: None,
}
}
}
@@ -43,8 +44,8 @@ impl MetaPlugin for MetaPluginProgram {
false
}
fn create(&self) -> Result<Box<dyn Write>> {
debug!("META: Writing using {:?}", *self);
fn initialize(&mut self, _conn: &rusqlite::Connection, _item_id: i64) -> Result<()> {
debug!("META: Initializing program plugin: {:?}", self);
let program = self.program.clone();
let args = self.args.clone();
@@ -55,6 +56,7 @@ impl MetaPlugin for MetaPluginProgram {
.args(args.clone())
.stdin(Stdio::piped())
.stdout(Stdio::piped())
.stderr(Stdio::piped())
.spawn()
.context(anyhow!(
"Problem spawning child process: {:?} {:?}",
@@ -62,29 +64,20 @@ impl MetaPlugin for MetaPluginProgram {
args
))?;
Ok(Box::new(ProgramWriter {
stdin: process.stdin.take().unwrap(),
}))
let stdin = process.stdin.take().unwrap();
self.writer = Some(Box::new(stdin));
self.process = Some(process);
Ok(())
}
fn finalize(&mut self) -> io::Result<String> {
let program = self.program.clone();
let args = self.args.clone();
debug!("META: Finalizing program plugin");
debug!("META: Executing command for finalize: {:?} {:?}", program, args);
let mut process = Command::new(program)
.args(args)
.stdin(Stdio::piped())
.stdout(Stdio::piped())
.stderr(Stdio::piped())
.spawn()
.map_err(|e| io::Error::new(io::ErrorKind::Other, format!("Failed to spawn process: {}", e)))?;
let stdin = process.stdin.as_mut().unwrap();
stdin.write_all(&self.buffer)
.map_err(|e| io::Error::new(io::ErrorKind::Other, format!("Failed to write to stdin: {}", e)))?;
// Close stdin to signal EOF to the process
self.writer.take();
if let Some(mut process) = self.process.take() {
let output = process.wait_with_output()
.map_err(|e| io::Error::new(io::ErrorKind::Other, format!("Failed to wait for process: {}", e)))?;
@@ -110,10 +103,20 @@ impl MetaPlugin for MetaPluginProgram {
format!("Command failed: {}", stderr.trim()),
))
}
} else {
Err(io::Error::new(
io::ErrorKind::Other,
"No process to finalize".to_string(),
))
}
}
fn update(&mut self, data: &[u8]) {
self.buffer.extend_from_slice(data);
if let Some(ref mut writer) = self.writer {
if let Err(e) = writer.write_all(data) {
debug!("META: Failed to write to process stdin: {}", e);
}
}
}
fn meta_name(&mut self) -> String {