fix: if there are no licenses, don't fail or generate empty results

We used to pick SBOMs which licenses. However, as RH's SBOMs no longer
contains licenses, we can't use that for generating the scenario file.

Author: ctron

src/scenario/mod.rs

@@ -300,7 +300,7 @@ FROM
     sbom_package_purl_ref spr
 JOIN
     sbom_package sp ON spr.sbom_id = sp.sbom_id AND spr.node_id = sp.node_id
-JOIN
+LEFT JOIN
     sbom_package_license spl ON sp.sbom_id = spl.sbom_id AND sp.node_id = spl.node_id
 GROUP BY
     spr.qualified_purl_id
@@ -339,25 +339,22 @@ LIMIT 10;
     }
 
     /// Get a pool of deletable SBOMs (up to 100)
-    /// These SBOMs are selected based on having certain licenses that make them good candidates for deletion testing
+    /// These SBOMs are selected based on having the most packages
     pub async fn deletable_sboms(&self) -> anyhow::Result<Vec<String>> {
         let mut db = crate::db::connect(&self.db).await?;
 
         let rows = sqlx::query(
             r#"
 SELECT
-    a.sbom_id::text as id
+    a.sbom_id::text as id,
+    count(b.*) as package_count
 FROM
     sbom a
-    JOIN sbom_node b ON a.sbom_id = b.sbom_id
-    JOIN sbom_package c ON b.sbom_id = c.sbom_id AND b.node_id = c.node_id
-    JOIN sbom_package_license d ON c.sbom_id = d.sbom_id AND c.node_id = d.node_id
-    JOIN license e ON d.license_id = e.id
-WHERE
-    e.text IN ('GPLv3+ with exceptions', 'Apache-2.0', 'MIT', 'BSD-3-Clause')
+    JOIN sbom_package b ON a.sbom_id = b.sbom_id
 GROUP BY
     a.sbom_id
 ORDER BY
+    package_count DESC,
     a.sbom_id
 LIMIT 100
 "#,