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
|
use std::path::Path;
pub fn detect_language(filename: &Path, contents: &str) -> &'static str {
detect_from_extension(filename)
.or_else(|| detect_from_shebang(contents))
.unwrap_or("")
}
fn detect_from_extension(filename: &Path) -> Option<&'static str> {
let ext = filename
.extension()
.and_then(|e| e.to_str())
.map(|e| e.to_ascii_lowercase());
let ext_str = ext.as_deref();
match ext_str {
Some("rs") => Some("rust"),
Some("py") => Some("python"),
Some("json") => Some("json"),
Some("toml") => Some("toml"),
Some("yaml") | Some("yml") => Some("yaml"),
Some("js") | Some("jsx") => Some("javascript"),
_ => None,
}
}
fn detect_from_shebang(contents: &str) -> Option<&'static str> {
if let Some(first_line) = contents.lines().next()
&& first_line.starts_with("#!")
{
if first_line.contains("python") {
return Some("python");
}
if first_line.contains("bash") || first_line.contains("/sh") || first_line.contains(" sh") {
return Some("bash");
}
}
None
}
#[cfg(test)]
mod tests {
use std::path::Path;
use super::detect_language;
#[test]
fn non_shebang_line_does_not_trigger_detection() {
let contents = "this mentions bash but is not a shebang";
assert_eq!(detect_language(Path::new("file"), contents), "");
}
#[test]
fn detects_python_from_shebang() {
let contents = "#!/usr/bin/python3\nprint('hi')";
assert_eq!(detect_language(Path::new("file"), contents), "python");
}
#[test]
fn sh_shebang_maps_to_bash_for_llm() {
let contents = "#!/bin/sh\necho hi";
assert_eq!(detect_language(Path::new("file"), contents), "bash");
}
#[test]
fn env_shebang_is_detected() {
let contents = "#!/usr/bin/env sh\necho hi";
assert_eq!(detect_language(Path::new("file"), contents), "bash");
}
#[test]
fn extension_overrides_shebang() {
let contents = "#!/bin/bash\nprint('hello')";
assert_eq!(detect_language(Path::new("main.py"), contents), "python");
}
#[test]
fn yaml_extension_is_detected() {
assert_eq!(detect_language(Path::new("config.yaml"), ""), "yaml");
}
#[test]
fn yml_alias_maps_to_yaml() {
assert_eq!(detect_language(Path::new("config.yml"), ""), "yaml");
}
#[test]
fn js_extension_is_detected() {
assert_eq!(detect_language(Path::new("file.js"), ""), "javascript");
}
#[test]
fn jsx_maps_to_javascript() {
assert_eq!(detect_language(Path::new("file.jsx"), ""), "javascript");
}
#[test]
fn toml_extension_is_detected() {
assert_eq!(detect_language(Path::new("Cargo.toml"), ""), "toml");
}
}
|
