sashiko 0.2.4

Agentic code review system for Linux kernel
Documentation 
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// Copyright 2026 The Sashiko Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

use crate::toolbox::SashikoToolContext;
use crate::toolbox::framework::LlmTool;
use anyhow::{Result, anyhow};
use async_trait::async_trait;
use serde_json::{Value, json};
use tokio::process::Command;

pub struct GitLsTool;

#[async_trait]
impl LlmTool<SashikoToolContext> for GitLsTool {
    fn name(&self) -> &'static str {
        "git_ls"
    }

    fn description(&self) -> &'static str {
        "List files in a directory at a specific Git revision."
    }

    fn parameters(&self) -> Value {
        json!({
            "type": "object",
            "properties": {
                "revision": { "type": "string", "description": "The Git commit SHA or reference to list from." },
                "path": { "type": "string", "description": "Relative path to the directory (e.g., '.' or 'src/')." }
            },
            "required": ["revision", "path"]
        })
    }

    async fn call(&self, args: Value, context: &SashikoToolContext) -> Result<Value> {
        let revision_raw = args["revision"]
            .as_str()
            .ok_or_else(|| anyhow!("Missing revision"))?;
        let revision_virt = context.virtualize_ref(revision_raw);
        let revision = revision_virt.as_str();
        let path_str = args["path"]
            .as_str()
            .ok_or_else(|| anyhow!("Missing path"))?;

        if revision.starts_with('-') || path_str.starts_with('-') {
            return Err(anyhow!("Invalid revision or path name"));
        }

        let tree_spec = if path_str.is_empty() || path_str == "." {
            revision.to_string()
        } else {
            format!("{}:{}", revision, path_str)
        };

        let mut cmd = Command::new("git");
        cmd.current_dir(&context.worktree_path)
            .args(["ls-tree", &tree_spec]);

        let output = cmd.output().await?;
        if !output.status.success() {
            let stderr = String::from_utf8_lossy(&output.stderr).trim().to_string();
            return Ok(
                json!({ "error": format!("git ls-tree failed for {}: {}", tree_spec, stderr) }),
            );
        }

        let content = String::from_utf8_lossy(&output.stdout).to_string();
        let mut entries = Vec::new();
        for line in content.lines() {
            let split_tab: Vec<&str> = line.split('\t').collect();
            if split_tab.len() >= 2 {
                let filename = split_tab[1];
                let metadata: Vec<&str> = split_tab[0].split_whitespace().collect();
                if metadata.len() >= 2 {
                    let ty = match metadata[1] {
                        "tree" => "dir",
                        _ => "file",
                    };
                    entries.push(json!({ "name": filename, "type": ty }));
                }
            }
        }

        let total_entries = entries.len();
        let truncated = total_entries > 1000;
        if truncated {
            entries.truncate(1000);
        }

        Ok(json!({
            "entries": entries,
            "truncated": truncated,
            "total_entries": total_entries,
            "next_page_hint": if truncated {
                Some("Directory listing truncated to 1000 entries. Please call git_ls with a specific subdirectory path (e.g., 'src/worker/') to see more files.".to_string())
            } else {
                None
            }
        }))
    }
}