cargo-grip4rust 0.7.0

A cargo subcommand for measuring Rust testability
Documentation 
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

// Copyright 2026 Umberto Gotti <umberto.gotti@umbertogotti.dev>
// Licensed under the MIT License
// SPDX-License-Identifier: MIT

use std::fs;
use std::path::{Path, PathBuf};

use anyhow::{Context, Result};
use walkdir::WalkDir;

use crate::traits::walk::Walk;

#[derive(Debug, Clone)]
pub struct FsWalk {
    root: PathBuf,
}

impl FsWalk {
    #[must_use]
    pub fn new(path: impl Into<PathBuf>) -> Self {
        Self { root: path.into() }
    }
}

impl Walk for FsWalk {
    fn rust_files(&self) -> Result<Vec<(PathBuf, String)>> {
        let mut files = Vec::new();
        for entry in WalkDir::new(&self.root)
            .into_iter()
            .filter_map(|entry| entry.ok())
            .filter(|entry| entry.file_type().is_file())
            .filter(|entry| entry.path().extension() == Some("rs".as_ref()))
        {
            let path = entry.path();
            if self.is_excluded(path) {
                continue;
            }
            let source = fs::read_to_string(path)
                .with_context(|| format!("failed to read {}", path.display()))?;
            files.push((path.to_path_buf(), source));
        }
        Ok(files)
    }
}

impl FsWalk {
    fn is_excluded(&self, path: &Path) -> bool {
        if path.file_name().and_then(|n| n.to_str()) == Some("build.rs") {
            return true;
        }
        let relative = match path.strip_prefix(&self.root) {
            Ok(r) => r,
            Err(_) => return false,
        };
        relative.components().any(|c| {
            matches!(
                c.as_os_str().to_str(),
                Some("target" | ".git" | "tests" | "examples" | "benches")
            )
        })
    }
}