When loadResumeCommand() rejects a resume list, give a more informative

explanation.

svn path=/main/trunk/; revision=10139

diff --git a/pym/_emerge/__init__.py b/pym/_emerge/__init__.py
index 1a36123a1e56ce6d5b7a5bafc26013884440f2c0..fab89f17f55d4d2d5b6f5811a1b7d2d365318554 100644 (file)
--- a/pym/_emerge/__init__.py
+++ b/pym/_emerge/__init__.py
@@ -4837,8 +4837,8 @@ class depgraph(object):
                                # This probably means that a required package
                                # was dropped via --skipfirst. It makes the
                                # resume list invalid, so convert it to a
-                               # PackageNotFound exception.
-                               raise portage.exception.PackageNotFound(
+                               # UnsatisfiedResumeDep exception.
+                               raise self.UnsatisfiedResumeDep(
                                        self._unsatisfied_deps[0].atom)
                        self._serialized_tasks_cache = None
                        try:
@@ -4908,6 +4908,13 @@ class depgraph(object):
                                        if arg not in refs:
                                                refs.append(arg)
 
+       class UnsatisfiedResumeDep(portage.exception.PortageException):
+               """
+               A dependency of a resume list is not installed. This
+               can occur when a required package is dropped from the
+               merge list via --skipfirst.
+               """
+
        class _internal_exception(portage.exception.PortageException):
                def __init__(self, value=""):
                        portage.exception.PortageException.__init__(self, value)
@@ -7763,14 +7770,34 @@ def action_build(settings, trees, mtimedb,
                success = False
                try:
                        success = mydepgraph.loadResumeCommand(mtimedb["resume"])
-               except portage.exception.PackageNotFound:
+               except (portage.exception.PackageNotFound,
+                       mydepgraph.UnsatisfiedResumeDep), e:
                        if show_spinner:
                                print
+                       from textwrap import wrap
                        from portage.output import EOutput
                        out = EOutput()
-                       out.eerror("Error: The resume list contains packages that are no longer")
-                       out.eerror("       available to be emerged. Please restart/continue")
-                       out.eerror("       the merge operation manually.")
+
+                       if isinstance(e, mydepgraph.UnsatisfiedResumeDep):
+                               out.eerror("An expected dependency " + \
+                                       "is not installed: %s" % str(e))
+                               out.eerror("")
+                               msg = "The resume list contains packages " + \
+                                       "with dependencies that have not been " + \
+                                       "installed yet. Please restart/continue " + \
+                                       "the operation manually."
+                               for line in wrap(msg, 72):
+                                       out.eerror(line)
+                       elif isinstance(e, portage.exception.PackageNotFound):
+                               out.eerror("An expected package is " + \
+                                       "not available: %s" % str(e))
+                               out.eerror("")
+                               msg = "The resume list contains one or more " + \
+                                       "packages that are no longer " + \
+                                       "available. Please restart/continue " + \
+                                       "the operation manually."
+                               for line in wrap(msg, 72):
+                                       out.eerror(line)
                else:
                        if show_spinner:
                                print "\b\b... done!"