Handle unknown licenses.

src/main.ts

@@ -36,14 +36,6 @@ async function run(): Promise<void> {
       deny: config.deny_licenses
     }
 
-    let licenseErrors = getDeniedLicenseChanges(changes, licenses)
-
-    if (licenseErrors.length > 0) {
-      printLicensesError(licenseErrors, licenses)
-      core.setFailed('Dependency review detected incompatible licenses.')
-      return
-    }
-
     let filteredChanges = filterChangesBySeverity(
       minSeverity as Severity,
       changes
@@ -60,8 +52,19 @@ async function run(): Promise<void> {
       }
     }
 
+    let [licenseErrors, unknownLicenses] = getDeniedLicenseChanges(
+      changes,
+      licenses
+    )
+
+    if (licenseErrors.length > 0) {
+      printLicensesError(licenseErrors, licenses)
+      printNullLicenses(unknownLicenses)
+      core.setFailed('Dependency review detected incompatible licenses.')
+    }
+
     if (failed) {
-      throw new Error('Dependency review detected vulnerable packages.')
+      core.setFailed('Dependency review detected vulnerable packages.')
     } else {
       core.info(
         `Dependency review did not detect any vulnerable packages with severity level "${minSeverity}" or higher.`
@@ -126,7 +129,7 @@ function printLicensesError(
 
   let {allow = [], deny = []} = licenses
 
-  core.info('The following dependencies have incompatible licenses:\n')
+  core.info('\nThe following dependencies have incompatible licenses:\n')
   for (const change of changes) {
     core.info(
       `${styles.bold.open}${change.manifest} » ${change.name}@${change.version}${styles.bold.close} – License: ${styles.color.red.open}${change.license}${styles.color.red.close}`
@@ -134,4 +137,13 @@ function printLicensesError(
   }
 }
 
+function printNullLicenses(changes: Array<Change>): void {
+  core.info('\nWe could not detect a license for the following dependencies:\n')
+  for (const change of changes) {
+    core.info(
+      `${styles.bold.open}${change.manifest} » ${change.name}@${change.version}${styles.bold.close}`
+    )
+  }
+}
+
 run()