Make gjl report missing dependencies with a useful error message instead of a stack trace. Bug #168855.

svn path=/projects/java-config-2/trunk/; revision=3920

1 files changed, 11 insertions, 2 deletions

diff --git a/src/gjl b/src/gjl
index 4eadc12..e1bee4b 100755
--- a/src/gjl
+++ b/src/gjl
@@ -33,9 +33,18 @@ def get_needed_packages(package):
     while len(unresolved) > 0:
         pkg = unresolved.pop()
         resolved.add(pkg)
-
+        # dep is in the form of (jar, pkg)
         for dep in pkg.deps():
-            p = manager.get_package(dep[-1])
+            dep_pkg = dep[-1]
+            p = manager.get_package(dep_pkg)
+            if p is None:
+                msg = """
+Package %s not found in the system. This package is listed as a
+dependency of %s. Please run emerge -uDa %s and if it does not bring in the
+needed dependency, report this to http://bugs.gentoo.org.
+"""
+
+                abort(msg % (dep_pkg,pkg,pkg))
 
             if p not in resolved:
                 unresolved.add(p)