cargo-deltabuild 0.1.0

Detects which crates in a Cargo workspace are affected by changes in a Git feature branch.
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

use crate::cargo::CargoMetadata;
use serde::{Deserialize, Serialize};
use std::collections::{HashMap, HashSet};

#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct Crates {
    crates: HashMap<String, Vec<String>>,
}

pub fn parse(metadata: &CargoMetadata) -> Crates {
    let mut workspace = HashSet::new();
    let mut dependencies = HashMap::new();

    for package in &metadata.packages {
        if package.source.is_some() {
            continue;
        }
        workspace.insert(package.name.clone());
        dependencies.insert(package.name.clone(), Vec::new());
    }

    for package in &metadata.packages {
        if package.source.is_some() {
            continue;
        }

        for dep in &package.dependencies {
            if dep.source.is_some() || !workspace.contains(&dep.name) {
                continue;
            }

            let package_deps = dependencies.get_mut(&package.name).unwrap();

            if !package_deps.contains(&dep.name) {
                package_deps.push(dep.name.clone());
            }
        }
    }

    Crates {
        crates: dependencies,
    }
}

impl Crates {
    pub fn get_dependencies(&self, crate_name: &str) -> Option<&Vec<String>> {
        self.crates.get(crate_name)
    }

    pub fn get_dependents(&self, crate_name: &str) -> Option<Vec<String>> {
        if !self.crates.contains_key(crate_name) {
            return None;
        }

        let mut dependents = Vec::new();

        for (name, deps) in &self.crates {
            if deps.contains(&crate_name.to_string()) {
                dependents.push(name.clone());
            }
        }

        Some(dependents)
    }

    pub fn get_dependencies_transitive(&self, crate_name: &str) -> Option<Vec<String>> {
        if !self.crates.contains_key(crate_name) {
            return None;
        }

        let mut all_dependencies = HashSet::new();
        let mut to_visit = vec![crate_name.to_string()];
        let mut visited = HashSet::new();

        while let Some(current_crate) = to_visit.pop() {
            if visited.contains(&current_crate) {
                continue;
            }
            visited.insert(current_crate.clone());

            match self.get_dependencies(&current_crate) {
                Some(dependencies) => {
                    for dependency in dependencies {
                        if all_dependencies.insert(dependency.clone()) {
                            to_visit.push(dependency.clone());
                        }
                    }
                }
                None => {}
            }
        }

        Some(all_dependencies.into_iter().collect())
    }

    pub fn get_dependents_transitive(&self, crate_name: &str) -> Option<Vec<String>> {
        if !self.crates.contains_key(crate_name) {
            return None;
        }

        let mut all_dependents = HashSet::new();
        let mut to_visit = vec![crate_name.to_string()];
        let mut visited = HashSet::new();

        while let Some(current_crate) = to_visit.pop() {
            if visited.contains(&current_crate) {
                continue;
            }
            visited.insert(current_crate.clone());

            match self.get_dependents(&current_crate) {
                Some(dependents) => {
                    for dependent in dependents {
                        if all_dependents.insert(dependent.clone()) {
                            to_visit.push(dependent.clone());
                        }
                    }
                }
                None => {}
            }
        }

        Some(all_dependents.into_iter().collect())
    }

    pub fn len(&self) -> usize {
        self.crates.len()
    }

    pub fn get_all_crate_names(&self) -> Vec<String> {
        self.crates.keys().cloned().collect()
    }
}