src/tools/clippy/clippy_lints/src/cargo/wildcard_dependencies.rs

use cargo_metadata::Metadata;
use clippy_utils::diagnostics::span_lint;
use if_chain::if_chain;
use rustc_lint::LateContext;
use rustc_span::DUMMY_SP;

use super::WILDCARD_DEPENDENCIES;

pub(super) fn check(cx: &LateContext<'_>, metadata: &Metadata) {
    for dep in &metadata.packages[0].dependencies {
        // VersionReq::any() does not work
        if_chain! {
            if let Ok(wildcard_ver) = semver::VersionReq::parse("*");
            if let Some(ref source) = dep.source;
            if !source.starts_with("git");
            if dep.req == wildcard_ver;
            then {
                span_lint(
                    cx,
                    WILDCARD_DEPENDENCIES,
                    DUMMY_SP,
                    &format!("wildcard dependency for `{}`", dep.name),
                );
            }
        }
    }
}