scryer-engine 0.3.0

Tree-sitter AST indexing and reference resolution engine for Scryer code intelligence
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145

use std::fs;
use std::path::Path;
use tempfile::tempdir;

use scryer_db::{Project, ScryerDb, SymbolReference};
use scryer_engine::EngineService;

mod support;
use support::fingerprint::fingerprint;

async fn indexed(
    files: &[(&str, &str)],
) -> anyhow::Result<(tempfile::TempDir, EngineService, Project, ScryerDb)> {
    let temp = tempdir()?;
    let root = temp.path();
    for (path, content) in files {
        let full = root.join(path);
        fs::create_dir_all(full.parent().unwrap())?;
        fs::write(full, content)?;
    }
    let db = ScryerDb::new_in_memory().await?;
    let project = {
        let mut conn = db.lock().await;
        Project::create()
            .slug("multilang".to_string())
            .root_path(root.to_string_lossy().to_string())
            .default_branch("main".to_string())
            .is_active(true)
            .created_at("2026-10-07T00:00:00Z".to_string())
            .updated_at("2026-10-07T00:00:00Z".to_string())
            .exec(&mut *conn)
            .await?
    };
    let service = EngineService::new(db.clone());
    service.index_project(project.id, root).await?;
    Ok((temp, service, project, db))
}

#[tokio::test]
async fn test_python_cross_file_resolution() -> anyhow::Result<()> {
    let (_temp, _service, project, db) = indexed(&[
        ("util.py", "def helper(x):\n    return x + 1\n"),
        (
            "main.py",
            "from util import helper\n\ndef run():\n    return helper(1)\n",
        ),
    ])
    .await?;

    // The call to `helper` in main.py resolves to the one `helper`, in util.py.
    let fp = fingerprint(&db, project.id).await?;
    assert!(
        fp.references
            .iter()
            .any(|r| r.starts_with("main.py:") && r.contains(":call[exact]->util.py::")),
        "python call should resolve exactly into util.py: {:?}",
        fp.references
    );

    let mut conn = db.lock().await;
    let refs = SymbolReference::filter_by_project_id(project.id)
        .exec(&mut *conn)
        .await?;
    assert!(
        refs.iter().any(|r| r.role == "call"),
        "python call references must be indexed: {refs:?}"
    );
    let edges = scryer_db::CodeGraphEdge::filter_by_project_id(project.id)
        .exec(&mut *conn)
        .await?;
    assert!(
        edges.iter().any(|e| e.edge_type == "calls"),
        "python run() -> helper() call edge must exist"
    );
    Ok(())
}

#[tokio::test]
async fn test_typescript_cross_file_resolution() -> anyhow::Result<()> {
    let (_temp, _service, project, db) = indexed(&[
        (
            "util.ts",
            "export function helper(x: number): number {\n  return x + 1;\n}\n",
        ),
        (
            "main.ts",
            "import { helper } from './util';\n\nexport function run(): number {\n  return helper(1);\n}\n",
        ),
    ])
    .await?;

    // The call to `helper` in main.ts resolves to the one `helper`, in util.ts.
    let fp = fingerprint(&db, project.id).await?;
    assert!(
        fp.references
            .iter()
            .any(|r| r.starts_with("main.ts:") && r.contains(":call[exact]->util.ts::")),
        "typescript call should resolve exactly into util.ts: {:?}",
        fp.references
    );

    let mut conn = db.lock().await;
    let refs = SymbolReference::filter_by_project_id(project.id)
        .exec(&mut *conn)
        .await?;
    assert!(
        refs.iter().any(|r| r.role == "call"),
        "typescript call references must be indexed: {refs:?}"
    );
    let edges = scryer_db::CodeGraphEdge::filter_by_project_id(project.id)
        .exec(&mut *conn)
        .await?;
    assert!(
        edges.iter().any(|e| e.edge_type == "calls"),
        "typescript run() -> helper() call edge must exist"
    );
    Ok(())
}

/// The watcher path (`index_file`) must work for non-Rust files too.
#[tokio::test]
async fn test_index_file_handles_python_and_typescript() -> anyhow::Result<()> {
    let (temp, service, project, _db) = indexed(&[
        ("a.py", "def a():\n    pass\n"),
        ("a.ts", "export const a = 1;\n"),
    ])
    .await?;
    let root = temp.path();

    fs::write(
        root.join("a.py"),
        "def a():\n    pass\n\ndef b():\n    a()\n",
    )?;
    fs::write(
        root.join("a.ts"),
        "export const a = 1;\nexport const b = a;\n",
    )?;
    service
        .index_file(project.id, root, Path::new("a.py"))
        .await?;
    service
        .index_file(project.id, root, Path::new("a.ts"))
        .await?;
    Ok(())
}