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, 7 insertions, 2 deletions

diff --git a/test/error3.test b/test/error3.test
index 2665374..9bd294d 100644
--- a/test/error3.test
+++ b/test/error3.test
@@ -2,5 +2,10 @@
 --test-repo complicated1.repo
 add a !b
 @EXPECT
-ERROR: unsatisfiable dependencies:
-  a-3: b
+ERROR: unsatisfiable constraints:
+  d-2.0:
+    breaks: b-1[d<2.0]
+    satisfies: c-1[d>1.0]
+  b-1:
+    breaks: world[!b]
+    satisfies: a-3[b]