errors: rewrite the logic how errors are reported

Instead of the dependency oriented logic, switch to print them
for each package or name needed. Might give a bit more readable
errors now. There's still few corner cases that proper error is
not output, which are cought by the test cases.

1 files changed, 4 insertions, 2 deletions

diff --git a/test/error2.test b/test/error2.test
index 7f10fb1..db5f9c1 100644
--- a/test/error2.test
+++ b/test/error2.test
@@ -2,5 +2,7 @@
 --test-repo complicated1.repo
 add a d<1.5
 @EXPECT
-ERROR: unsatisfiable dependencies:
-  world: d<1.5
+ERROR: unsatisfiable constraints:
+  d-1.0:
+    breaks: c-1[d>1.0]
+    satisfies: world[d<1.5] b-1[d<2.0]