fix(pacmak): fail fast on OR conditions in Ruby version ranges

Author: omarqureshi

packages/jsii-pacmak/lib/targets/version-utils.ts

@@ -76,26 +76,27 @@ export function toPythonVersionRange(semverRange: string): string {
  */
 export function toRubyVersionRange(semverRange: string): string {
   const range = new Range(semverRange);
-  return range.set
-    .map((set) =>
-      set
-        .map((comp) => {
-          const versionId = toReleaseVersion(
-            comp.semver.raw?.replace(/-0$/, '') ?? '0.0.0',
-            TargetName.RUBY,
-          );
-          // eslint-disable-next-line @typescript-eslint/switch-exhaustiveness-check
-          switch (comp.operator) {
-            case '':
-              return comp.value === '' ? "'>= 0.0.0'" : `'= ${versionId}'`;
-            case '=':
-              return `'= ${versionId}'`;
-            default:
-              return `'${comp.operator} ${versionId}'`;
-          }
-        })
-        .join(', '),
-    )
+  if (range.set.length > 1) {
+    throw new Error(
+      `RubyGems does not support OR (||) requirements natively in a single dependency. Unsatisfiable constraint: ${semverRange}`,
+    );
+  }
+  return range.set[0]
+    .map((comp) => {
+      const versionId = toReleaseVersion(
+        comp.semver.raw?.replace(/-0$/, '') ?? '0.0.0',
+        TargetName.RUBY,
+      );
+      // eslint-disable-next-line @typescript-eslint/switch-exhaustiveness-check
+      switch (comp.operator) {
+        case '':
+          return comp.value === '' ? "'>= 0.0.0'" : `'= ${versionId}'`;
+        case '=':
+          return `'= ${versionId}'`;
+        default:
+          return `'${comp.operator} ${versionId}'`;
+      }
+    })
     .join(', ');
 }