Add find-replace-file tool, use it by default over edit-files-tool (#27438)

@agu-z and paired on trying out a "one tool call per edit" approach for
editing files. (The previous approach is still available, it's just
unchecked by default for now.)

Release Notes:

- N/A

---------

Co-authored-by: Agus <agus@zed.dev>
This commit is contained in:
Richard Feldman 2025-03-25 13:12:50 -04:00 committed by GitHub
parent cd1e56d6c7
commit bf255486c0
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7 changed files with 239 additions and 4 deletions

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@ -0,0 +1,224 @@
use anyhow::{anyhow, Context as _, Result};
use assistant_tool::{ActionLog, Tool};
use gpui::{App, AppContext, Entity, Task};
use language_model::LanguageModelRequestMessage;
use project::Project;
use schemars::JsonSchema;
use serde::{Deserialize, Serialize};
use std::{collections::HashSet, path::PathBuf, sync::Arc};
use crate::replace::replace_exact;
#[derive(Debug, Serialize, Deserialize, JsonSchema)]
pub struct FindReplaceFileToolInput {
/// The path of the file to modify.
///
/// WARNING: When specifying which file path need changing, you MUST
/// start each path with one of the project's root directories.
///
/// The following examples assume we have two root directories in the project:
/// - backend
/// - frontend
///
/// <example>
/// `backend/src/main.rs`
///
/// Notice how the file path starts with root-1. Without that, the path
/// would be ambiguous and the call would fail!
/// </example>
///
/// <example>
/// `frontend/db.js`
/// </example>
pub path: PathBuf,
/// A user-friendly description of what's being replaced. This will be shown in the UI.
///
/// <example>Fix API endpoint URLs</example>
/// <example>Update copyright year</example>
pub display_description: String,
/// The unique string to find in the file. This string cannot be empty;
/// if the string is empty, the tool call will fail. Remember, do not use this tool
/// to create new files from scratch, or to overwrite existing files! Use a different
/// approach if you want to do that.
///
/// If this string appears more than once in the file, this tool call will fail,
/// so it is absolutely critical that you verify ahead of time that the string
/// is unique. You can search within the file to verify this.
///
/// To make the string more likely to be unique, include a minimum of 3 lines of context
/// before the string you actually want to find, as well as a minimum of 3 lines of
/// context after the string you want to find. (These lines of context should appear
/// in the `replace` string as well.) If 3 lines of context is not enough to obtain
/// a string that appears only once in the file, then double the number of context lines
/// until the string becomes unique. (Start with 3 lines before and 3 lines after
/// though, because too much context is needlessly costly.)
///
/// Do not alter the context lines of code in any way, and make sure to preserve all
/// whitespace and indentation for all lines of code. This string must be exactly as
/// it appears in the file, because this tool will do a literal find/replace, and if
/// even one character in this string is different in any way from how it appears
/// in the file, then the tool call will fail.
///
/// <example>
/// If a file contains this code:
///
/// ```rust
/// fn check_user_permissions(user_id: &str) -> Result<bool> {
/// // Check if user exists first
/// let user = database.find_user(user_id)?;
///
/// // This is the part we want to modify
/// if user.role == "admin" {
/// return Ok(true);
/// }
///
/// // Check other permissions
/// check_custom_permissions(user_id)
/// }
/// ```
///
/// Your find string should include at least 3 lines of context before and after the part
/// you want to change:
///
/// ```
/// fn check_user_permissions(user_id: &str) -> Result<bool> {
/// // Check if user exists first
/// let user = database.find_user(user_id)?;
///
/// // This is the part we want to modify
/// if user.role == "admin" {
/// return Ok(true);
/// }
///
/// // Check other permissions
/// check_custom_permissions(user_id)
/// }
/// ```
///
/// And your replace string might look like:
///
/// ```
/// fn check_user_permissions(user_id: &str) -> Result<bool> {
/// // Check if user exists first
/// let user = database.find_user(user_id)?;
///
/// // This is the part we want to modify
/// if user.role == "admin" || user.role == "superuser" {
/// return Ok(true);
/// }
///
/// // Check other permissions
/// check_custom_permissions(user_id)
/// }
/// ```
/// </example>
pub find: String,
/// The string to replace the one unique occurrence of the find string with.
pub replace: String,
}
pub struct FindReplaceFileTool;
impl Tool for FindReplaceFileTool {
fn name(&self) -> String {
"find-replace-file".into()
}
fn needs_confirmation(&self) -> bool {
true
}
fn description(&self) -> String {
include_str!("find_replace_tool/description.md").to_string()
}
fn input_schema(&self) -> serde_json::Value {
let schema = schemars::schema_for!(FindReplaceFileToolInput);
serde_json::to_value(&schema).unwrap()
}
fn ui_text(&self, input: &serde_json::Value) -> String {
match serde_json::from_value::<FindReplaceFileToolInput>(input.clone()) {
Ok(input) => input.display_description,
Err(_) => "Edit file".to_string(),
}
}
fn run(
self: Arc<Self>,
input: serde_json::Value,
_messages: &[LanguageModelRequestMessage],
project: Entity<Project>,
action_log: Entity<ActionLog>,
cx: &mut App,
) -> Task<Result<String>> {
let input = match serde_json::from_value::<FindReplaceFileToolInput>(input) {
Ok(input) => input,
Err(err) => return Task::ready(Err(anyhow!(err))),
};
cx.spawn(async move |cx| {
let project_path = project.read_with(cx, |project, cx| {
project
.find_project_path(&input.path, cx)
.context("Path not found in project")
})??;
let buffer = project
.update(cx, |project, cx| project.open_buffer(project_path, cx))?
.await?;
let snapshot = buffer.read_with(cx, |buffer, _cx| buffer.snapshot())?;
if input.find.is_empty() {
return Err(anyhow!("`find` string cannot be empty. Use a different tool if you want to create a file."));
}
let result = cx
.background_spawn(async move {
replace_exact(&input.find, &input.replace, &snapshot).await
})
.await;
if let Some(diff) = result {
buffer.update(cx, |buffer, cx| {
let _ = buffer.apply_diff(diff, cx);
})?;
project.update(cx, |project, cx| {
project.save_buffer(buffer.clone(), cx)
})?.await?;
action_log.update(cx, |log, cx| {
let mut buffers = HashSet::default();
buffers.insert(buffer);
log.buffer_edited(buffers, cx);
})?;
Ok(format!("Edited {}", input.path.display()))
} else {
let err = buffer.read_with(cx, |buffer, _cx| {
let file_exists = buffer
.file()
.map_or(false, |file| file.disk_state().exists());
if !file_exists {
anyhow!("{} does not exist", input.path.display())
} else if buffer.is_empty() {
anyhow!(
"{} is empty, so the provided `find` string wasn't found.",
input.path.display()
)
} else {
anyhow!("Failed to match the provided `find` string")
}
})?;
Err(err)
}
})
}
}