Charlie Marsh
9b3405bf0e
Updates to `29c48fb9f3daa11bd02794edd55060d0b01ee705` from the `pubgrub-rs` dev branch. This lets us reduce the number of changes we've made to PubGrub itself (now, only changing visibility to export a few things from the `solver.rs` module).
50 lines
1.8 KiB
Rust
50 lines
1.8 KiB
Rust
// SPDX-License-Identifier: MPL-2.0
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use pubgrub::error::PubGrubError;
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use pubgrub::range::Range;
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use pubgrub::report::{DefaultStringReporter, Reporter};
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use pubgrub::solver::{resolve, OfflineDependencyProvider};
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use pubgrub::version::SemanticVersion;
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type SemVS = Range<SemanticVersion>;
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// https://github.com/dart-lang/pub/blob/master/doc/solver.md#linear-error-reporting
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fn main() {
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let mut dependency_provider = OfflineDependencyProvider::<&str, SemVS>::new();
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#[rustfmt::skip]
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// root 1.0.0 depends on foo ^1.0.0 and baz ^1.0.0
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dependency_provider.add_dependencies(
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"root", (1, 0, 0),
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[
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("foo", Range::from_range_bounds((1, 0, 0)..(2, 0, 0))),
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("baz", Range::from_range_bounds((1, 0, 0)..(2, 0, 0))),
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],
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);
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#[rustfmt::skip]
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// foo 1.0.0 depends on bar ^2.0.0
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dependency_provider.add_dependencies(
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"foo", (1, 0, 0),
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[("bar", Range::from_range_bounds((2, 0, 0)..(3, 0, 0)))],
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);
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#[rustfmt::skip]
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// bar 2.0.0 depends on baz ^3.0.0
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dependency_provider.add_dependencies(
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"bar", (2, 0, 0),
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[("baz", Range::from_range_bounds((3, 0, 0)..(4, 0, 0)))],
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);
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// baz 1.0.0 and 3.0.0 have no dependencies
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dependency_provider.add_dependencies("baz", (1, 0, 0), []);
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dependency_provider.add_dependencies("baz", (3, 0, 0), []);
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// Run the algorithm.
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match resolve(&dependency_provider, "root", (1, 0, 0)) {
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Ok(sol) => println!("{:?}", sol),
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Err(PubGrubError::NoSolution(mut derivation_tree)) => {
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derivation_tree.collapse_no_versions();
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eprintln!("{}", DefaultStringReporter::report(&derivation_tree));
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std::process::exit(1);
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}
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Err(err) => panic!("{:?}", err),
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};
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}
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