output separate lists of problems

Sponsored-by: pep.foundation

1 files changed, 29 insertions, 3 deletions

diff --git a/src/main.rs b/src/main.rs
index e1976f2..e904bd0 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -40,7 +40,9 @@ fn fallible_main() -> anyhow::Result<()> {
     let mut dependencies: HashMap<String, VersionReq> = HashMap::new();
     for package in metadata.packages {
         for dep in &package.dependencies {
-            if dep.target.is_none() && matches!(dep.kind, DependencyKind::Build | DependencyKind::Normal) {
+            if dep.target.is_none()
+                && matches!(dep.kind, DependencyKind::Build | DependencyKind::Normal)
+            {
                 trace!("package {} platform {:?}", package.name, dep.target);
                 let name = canonicalize_crate_name(&dep.name);
                 trace!("dependency on {} {}", name, dep.req);
@@ -86,9 +88,33 @@ fn fallible_main() -> anyhow::Result<()> {
             Problem::MissingCrate(name, _) => name.clone(),
             Problem::MissingVersion(name, _, _) => name.clone(),
         });
-        for p in problems.iter() {
-            println!("{}", p);
+
+        let versions: Vec<&Problem> = problems
+            .iter()
+            .filter(|p| matches!(p, Problem::MissingVersion(_, _, _)))
+            .collect();
+        if !versions.is_empty() {
+            println!("crates with required version missing:");
+            for v in versions {
+                if let Problem::MissingVersion(name, req, got) = v {
+                    println!("  {} {} (require {})", name, got, req);
+                }
+            }
+        }
+
+        let crates: Vec<&Problem> = problems
+            .iter()
+            .filter(|p| matches!(p, Problem::MissingCrate(__, _)))
+            .collect();
+        if !crates.is_empty() {
+            println!("crates missing entirely:");
+            for c in crates {
+                if let Problem::MissingCrate(name, req) = c {
+                    println!("  {} {}", name, req);
+                }
+            }
         }
+
         Err(anyhow!(
             "there were {} missing dependencies",
             problems.len()