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| 1 | +use crate::core::compiler::Unit; |
| 2 | +use crate::core::compiler::{CompileKind, CompileMode}; |
| 3 | +use crate::core::profiles::{Profile, UnitFor}; |
| 4 | +use crate::core::{nightly_features_allowed, InternedString, PackageId, Target}; |
| 5 | +use crate::util::CargoResult; |
| 6 | +use std::collections::HashMap; |
| 7 | +use std::io::Write; |
| 8 | + |
| 9 | +/// The dependency graph of Units. |
| 10 | +pub type UnitGraph<'a> = HashMap<Unit<'a>, Vec<UnitDep<'a>>>; |
| 11 | + |
| 12 | +/// A unit dependency. |
| 13 | +#[derive(Debug, Clone, Hash, Eq, PartialEq, PartialOrd, Ord)] |
| 14 | +pub struct UnitDep<'a> { |
| 15 | + /// The dependency unit. |
| 16 | + pub unit: Unit<'a>, |
| 17 | + /// The purpose of this dependency (a dependency for a test, or a build |
| 18 | + /// script, etc.). |
| 19 | + pub unit_for: UnitFor, |
| 20 | + /// The name the parent uses to refer to this dependency. |
| 21 | + pub extern_crate_name: InternedString, |
| 22 | + /// Whether or not this is a public dependency. |
| 23 | + pub public: bool, |
| 24 | + /// If `true`, the dependency should not be added to Rust's prelude. |
| 25 | + pub noprelude: bool, |
| 26 | +} |
| 27 | + |
| 28 | +const VERSION: u32 = 1; |
| 29 | + |
| 30 | +#[derive(serde::Serialize)] |
| 31 | +struct SerializedUnitGraph<'a> { |
| 32 | + version: u32, |
| 33 | + units: Vec<SerializedUnit<'a>>, |
| 34 | + roots: Vec<usize>, |
| 35 | +} |
| 36 | + |
| 37 | +#[derive(serde::Serialize)] |
| 38 | +struct SerializedUnit<'a> { |
| 39 | + pkg_id: PackageId, |
| 40 | + target: &'a Target, |
| 41 | + profile: &'a Profile, |
| 42 | + platform: CompileKind, |
| 43 | + mode: CompileMode, |
| 44 | + features: &'a Vec<InternedString>, |
| 45 | + #[serde(skip_serializing_if = "std::ops::Not::not")] // hide for unstable build-std |
| 46 | + is_std: bool, |
| 47 | + dependencies: Vec<SerializedUnitDep>, |
| 48 | +} |
| 49 | + |
| 50 | +#[derive(serde::Serialize)] |
| 51 | +struct SerializedUnitDep { |
| 52 | + index: usize, |
| 53 | + extern_crate_name: InternedString, |
| 54 | + // This is only set on nightly since it is unstable. |
| 55 | + #[serde(skip_serializing_if = "Option::is_none")] |
| 56 | + public: Option<bool>, |
| 57 | + // This is only set on nightly since it is unstable. |
| 58 | + #[serde(skip_serializing_if = "Option::is_none")] |
| 59 | + noprelude: Option<bool>, |
| 60 | + // Intentionally not including `unit_for` because it is a low-level |
| 61 | + // internal detail that is mostly used for building the graph. |
| 62 | +} |
| 63 | + |
| 64 | +pub fn emit_serialized_unit_graph( |
| 65 | + root_units: &[Unit<'_>], |
| 66 | + unit_graph: &UnitGraph<'_>, |
| 67 | +) -> CargoResult<()> { |
| 68 | + let is_nightly = nightly_features_allowed(); |
| 69 | + let mut units: Vec<(&Unit<'_>, &Vec<UnitDep<'_>>)> = unit_graph.iter().collect(); |
| 70 | + units.sort_unstable(); |
| 71 | + // Create a map for quick lookup for dependencies. |
| 72 | + let indices: HashMap<&Unit<'_>, usize> = units |
| 73 | + .iter() |
| 74 | + .enumerate() |
| 75 | + .map(|(i, val)| (val.0, i)) |
| 76 | + .collect(); |
| 77 | + let roots = root_units.iter().map(|root| indices[root]).collect(); |
| 78 | + let ser_units = units |
| 79 | + .iter() |
| 80 | + .map(|(unit, unit_deps)| { |
| 81 | + let dependencies = unit_deps |
| 82 | + .iter() |
| 83 | + .map(|unit_dep| { |
| 84 | + // https://github.com/rust-lang/rust/issues/64260 when stabilized. |
| 85 | + let (public, noprelude) = if is_nightly { |
| 86 | + (Some(unit_dep.public), Some(unit_dep.noprelude)) |
| 87 | + } else { |
| 88 | + (None, None) |
| 89 | + }; |
| 90 | + SerializedUnitDep { |
| 91 | + index: indices[&unit_dep.unit], |
| 92 | + extern_crate_name: unit_dep.extern_crate_name, |
| 93 | + public, |
| 94 | + noprelude, |
| 95 | + } |
| 96 | + }) |
| 97 | + .collect(); |
| 98 | + SerializedUnit { |
| 99 | + pkg_id: unit.pkg.package_id(), |
| 100 | + target: unit.target, |
| 101 | + profile: &unit.profile, |
| 102 | + platform: unit.kind, |
| 103 | + mode: unit.mode, |
| 104 | + features: &unit.features, |
| 105 | + is_std: unit.is_std, |
| 106 | + dependencies, |
| 107 | + } |
| 108 | + }) |
| 109 | + .collect(); |
| 110 | + let s = SerializedUnitGraph { |
| 111 | + version: VERSION, |
| 112 | + units: ser_units, |
| 113 | + roots, |
| 114 | + }; |
| 115 | + |
| 116 | + let stdout = std::io::stdout(); |
| 117 | + let mut lock = stdout.lock(); |
| 118 | + serde_json::to_writer(&mut lock, &s)?; |
| 119 | + write!(lock, "\n")?; |
| 120 | + Ok(()) |
| 121 | +} |
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