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

extern crate cargo_metadata;
extern crate failure;
extern crate toml;
#[macro_use]
extern crate serde_derive;

pub type Result<T> = std::result::Result<T, failure::Error>;

fn normalize(license_string: &str) -> String {
    let mut list: Vec<&str> = license_string
        .split('/')
        .map(|e| e.trim())
        .collect();
    list.sort();
    list.dedup();
    list.join("/")
}

#[derive(Debug, Serialize, Clone, Hash, Ord, PartialOrd, Eq, PartialEq)]
pub struct DependencyDetails {
    pub name: String,
    pub version: String,
    pub authors: Option<String>,
    pub repository: Option<String>,
    pub license: Option<String>,
    pub license_file: Option<String>,
    pub description: Option<String>,
}

impl DependencyDetails {
    pub fn new(package: &cargo_metadata::Package) -> Self {
        let authors = if package.authors.is_empty() {
            None
        } else {
            Some(package.authors.to_owned().join("|"))
        };
        DependencyDetails {
            name: package.name.to_owned(),
            version: package.version.to_owned(),
            authors,
            repository: package.repository.to_owned(),
            license: package.license.as_ref().map(|s| normalize(&s)),
            license_file: package
                .license_file
                .to_owned()
                .and_then(|f| f.to_str().map(|x| x.to_owned())),
            description: package
                .description
                .to_owned()
                .map(|s| s.trim().replace("\n", " ")),
        }
    }
}

pub fn get_dependencies_from_cargo_lock() -> Result<Vec<DependencyDetails>> {
    let mut path = std::env::current_dir()?;
    path.push("Cargo.toml");
    let metadata =
        cargo_metadata::metadata_deps(Some(&path), true).map_err(failure::SyncFailure::new)?;

    let mut detailed_dependencies: Vec<DependencyDetails> = Vec::new();
    for package in metadata.packages {
        detailed_dependencies.push(DependencyDetails::new(&package));
    }
    Ok(detailed_dependencies)
}

#[cfg(test)]
mod test {
    use super::*;

    #[test]
    fn test_detailed() {
        let detailed_dependencies = get_dependencies_from_cargo_lock().unwrap();
        assert!(!detailed_dependencies.is_empty());
        for detailed_dependency in detailed_dependencies.iter() {
            assert!(
                detailed_dependency.license.is_some() || detailed_dependency.license_file.is_some()
            );
        }
    }
}