opi_coding_agent/tool/
edit.rs

1use std::future::Future;
2use std::path::PathBuf;
3use std::pin::Pin;
4
5use opi_agent::tool::{ExecutionMode, Tool, ToolError, ToolResult};
6use opi_ai::message::{OutputContent, ToolDef};
7use schemars::JsonSchema;
8use serde::Deserialize;
9use tokio_util::sync::CancellationToken;
10
11#[derive(Debug, Deserialize, JsonSchema)]
12pub struct EditArgs {
13    /// Relative path within workspace to edit.
14    pub path: String,
15    /// Exact string to find in the file.
16    pub old_string: String,
17    /// Replacement string.
18    pub new_string: String,
19}
20
21pub struct EditTool {
22    workspace_root: PathBuf,
23    schema: serde_json::Value,
24}
25
26impl EditTool {
27    pub fn new(workspace_root: PathBuf) -> Self {
28        let schema = schemars::schema_for!(EditArgs);
29        Self {
30            workspace_root,
31            schema: serde_json::to_value(&schema).unwrap_or_default(),
32        }
33    }
34}
35
36impl Tool for EditTool {
37    fn definition(&self) -> ToolDef {
38        ToolDef {
39            name: "edit".into(),
40            description: "Replace an exact string in a file.".into(),
41            input_schema: self.schema.clone(),
42        }
43    }
44
45    fn execute(
46        &self,
47        _call_id: &str,
48        arguments: serde_json::Value,
49        _signal: CancellationToken,
50        _on_update: Option<opi_agent::tool::UpdateCallback>,
51    ) -> Pin<Box<dyn Future<Output = Result<ToolResult, ToolError>> + Send>> {
52        let args: EditArgs = match serde_json::from_value(arguments) {
53            Ok(a) => a,
54            Err(e) => {
55                return Box::pin(async move {
56                    Ok(ToolResult {
57                        content: vec![OutputContent::Text {
58                            text: format!("invalid arguments: {e}"),
59                        }],
60                        details: None,
61                        is_error: true,
62                        terminate: false,
63                    })
64                });
65            }
66        };
67        let file_path = match super::validate_workspace_path(&self.workspace_root, &args.path) {
68            Ok(p) => p,
69            Err(msg) => {
70                return Box::pin(async move {
71                    Ok(ToolResult {
72                        content: vec![OutputContent::Text { text: msg }],
73                        details: None,
74                        is_error: true,
75                        terminate: false,
76                    })
77                });
78            }
79        };
80        let workspace_root = self.workspace_root.clone();
81        let path_for_display = args.path.clone();
82        Box::pin(async move {
83            let content = match tokio::fs::read_to_string(&file_path).await {
84                Ok(c) => c,
85                Err(e) => {
86                    return Ok(ToolResult {
87                        content: vec![OutputContent::Text {
88                            text: format!("failed to read {}: {e}", file_path.display()),
89                        }],
90                        details: None,
91                        is_error: true,
92                        terminate: false,
93                    });
94                }
95            };
96
97            if !content.contains(&args.old_string) {
98                return Ok(ToolResult {
99                    content: vec![OutputContent::Text {
100                        text: format!("old_string not found in {}", file_path.display()),
101                    }],
102                    details: None,
103                    is_error: true,
104                    terminate: false,
105                });
106            }
107
108            // Capture before state for diff rendering.
109            let before = content.clone();
110
111            // Replace first occurrence only.
112            let new_content = content.replacen(&args.old_string, &args.new_string, 1);
113
114            if let Err(e) = tokio::fs::write(&file_path, &new_content).await {
115                return Ok(ToolResult {
116                    content: vec![OutputContent::Text {
117                        text: format!("failed to write {}: {e}", file_path.display()),
118                    }],
119                    details: None,
120                    is_error: true,
121                    terminate: false,
122                });
123            }
124
125            let details = serde_json::json!({
126                "workspace_root": workspace_root.to_string_lossy(),
127                "path": path_for_display,
128                "before": before,
129                "after": new_content,
130            });
131
132            Ok(ToolResult {
133                content: vec![OutputContent::Text {
134                    text: format!("edited {}", path_for_display),
135                }],
136                details: Some(details),
137                is_error: false,
138                terminate: false,
139            })
140        })
141    }
142
143    fn execution_mode(&self) -> ExecutionMode {
144        ExecutionMode::Sequential
145    }
146}
opi_coding_agent/tool/edit.rs

opi_coding_agent/tool/
edit.rs
