vkcargo 0.45.1

Fork of Cargo, a package manager for Rust. This fork is for testing of vojtechkral's changes and is temporary.
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
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

use crate::core::compiler::Unit;
use crate::core::compiler::{CompileKind, CompileMode};
use crate::core::profiles::{Profile, UnitFor};
use crate::core::{nightly_features_allowed, InternedString, PackageId, Target};
use crate::util::CargoResult;
use std::collections::HashMap;
use std::io::Write;

/// The dependency graph of Units.
pub type UnitGraph<'a> = HashMap<Unit<'a>, Vec<UnitDep<'a>>>;

/// A unit dependency.
#[derive(Debug, Clone, Hash, Eq, PartialEq, PartialOrd, Ord)]
pub struct UnitDep<'a> {
    /// The dependency unit.
    pub unit: Unit<'a>,
    /// The purpose of this dependency (a dependency for a test, or a build
    /// script, etc.).
    pub unit_for: UnitFor,
    /// The name the parent uses to refer to this dependency.
    pub extern_crate_name: InternedString,
    /// Whether or not this is a public dependency.
    pub public: bool,
    /// If `true`, the dependency should not be added to Rust's prelude.
    pub noprelude: bool,
}

const VERSION: u32 = 1;

#[derive(serde::Serialize)]
struct SerializedUnitGraph<'a> {
    version: u32,
    units: Vec<SerializedUnit<'a>>,
    roots: Vec<usize>,
}

#[derive(serde::Serialize)]
struct SerializedUnit<'a> {
    pkg_id: PackageId,
    target: &'a Target,
    profile: &'a Profile,
    platform: CompileKind,
    mode: CompileMode,
    features: &'a Vec<InternedString>,
    #[serde(skip_serializing_if = "std::ops::Not::not")] // hide for unstable build-std
    is_std: bool,
    dependencies: Vec<SerializedUnitDep>,
}

#[derive(serde::Serialize)]
struct SerializedUnitDep {
    index: usize,
    extern_crate_name: InternedString,
    // This is only set on nightly since it is unstable.
    #[serde(skip_serializing_if = "Option::is_none")]
    public: Option<bool>,
    // This is only set on nightly since it is unstable.
    #[serde(skip_serializing_if = "Option::is_none")]
    noprelude: Option<bool>,
    // Intentionally not including `unit_for` because it is a low-level
    // internal detail that is mostly used for building the graph.
}

pub fn emit_serialized_unit_graph(
    root_units: &[Unit<'_>],
    unit_graph: &UnitGraph<'_>,
) -> CargoResult<()> {
    let is_nightly = nightly_features_allowed();
    let mut units: Vec<(&Unit<'_>, &Vec<UnitDep<'_>>)> = unit_graph.iter().collect();
    units.sort_unstable();
    // Create a map for quick lookup for dependencies.
    let indices: HashMap<&Unit<'_>, usize> = units
        .iter()
        .enumerate()
        .map(|(i, val)| (val.0, i))
        .collect();
    let roots = root_units.iter().map(|root| indices[root]).collect();
    let ser_units = units
        .iter()
        .map(|(unit, unit_deps)| {
            let dependencies = unit_deps
                .iter()
                .map(|unit_dep| {
                    // https://github.com/rust-lang/rust/issues/64260 when stabilized.
                    let (public, noprelude) = if is_nightly {
                        (Some(unit_dep.public), Some(unit_dep.noprelude))
                    } else {
                        (None, None)
                    };
                    SerializedUnitDep {
                        index: indices[&unit_dep.unit],
                        extern_crate_name: unit_dep.extern_crate_name,
                        public,
                        noprelude,
                    }
                })
                .collect();
            SerializedUnit {
                pkg_id: unit.pkg.package_id(),
                target: unit.target,
                profile: &unit.profile,
                platform: unit.kind,
                mode: unit.mode,
                features: &unit.features,
                is_std: unit.is_std,
                dependencies,
            }
        })
        .collect();
    let s = SerializedUnitGraph {
        version: VERSION,
        units: ser_units,
        roots,
    };

    let stdout = std::io::stdout();
    let mut lock = stdout.lock();
    serde_json::to_writer(&mut lock, &s)?;
    write!(lock, "\n")?;
    Ok(())
}