Add a MergeListItem.statusMessage(msg) callback for displaying messages like

"Building this" or "Installing that". This delegates the resposibility of
generating \r and \n control characters, to guarantee that lines are created
or erased when necessary and appropriate. TODO: Make JobStatusDisplay display
the output.

svn path=/main/trunk/; revision=11127

1 files changed, 25 insertions, 21 deletions

diff --git a/pym/_emerge/__init__.py b/pym/_emerge/__init__.py
index 491bee176..bfc5767e9 100644
--- a/pym/_emerge/__init__.py
+++ b/pym/_emerge/__init__.py
@@ -3328,7 +3328,7 @@ class MergeListItem(CompositeTask):
 		"binpkg_opts", "build_opts", "emerge_opts",
 		"failed_fetches", "find_blockers", "logger", "mtimedb", "pkg",
 		"pkg_count", "pkg_to_replace", "prefetcher",
-		"settings", "world_atom") + \
+		"settings", "statusMessage", "world_atom") + \
 		("_install_task",)
 
 	def _start(self):
@@ -3358,16 +3358,13 @@ class MergeListItem(CompositeTask):
 			action_desc = "Extracting"
 
 		if not build_opts.pretend:
-			extra_newline = "\n"
-			if self.background:
-				extra_newline = ""
-			portage.writemsg_stdout(
-				"%s>>> %s (%s of %s) %s %s %s\n" % \
-				(extra_newline, action_desc,
+
+			self.statusMessage("%s (%s of %s) %s %s %s" % \
+				(action_desc,
 				colorize("MERGE_LIST_PROGRESS", str(pkg_count.curval)),
 				colorize("MERGE_LIST_PROGRESS", str(pkg_count.maxval)),
-				colorize("GOOD", pkg.cpv), preposition, pkg.root),
-				noiselevel=-1)
+				colorize("GOOD", pkg.cpv), preposition, pkg.root))
+
 			logger.log(" >>> emerge (%s of %s) %s to %s" % \
 				(pkg_count.curval, pkg_count.maxval, pkg.cpv, pkg.root))
 
@@ -3462,24 +3459,15 @@ class PackageMerge(AsynchronousTask):
 		pkg_count = self.merge.pkg_count
 
 		if pkg.installed:
-
 			action_desc = "Uninstalling"
 			preposition = "from"
-
-			portage.writemsg_stdout(
-				">>> %s %s %s %s\n" % \
-				(action_desc, colorize("GOOD", pkg.cpv),
-				preposition, pkg.root), noiselevel=-1)
-
 		else:
-
 			action_desc = "Installing"
 			preposition = "to"
 
-			portage.writemsg_stdout(
-				">>> %s %s %s %s\n" % \
-				(action_desc, colorize("GOOD", pkg.cpv),
-				preposition, pkg.root), noiselevel=-1)
+		self.merge.statusMessage("%s %s %s %s" % \
+			(action_desc, colorize("GOOD", pkg.cpv),
+			preposition, pkg.root))
 
 		self.returncode = self.merge.merge()
 		self.wait()
@@ -9369,10 +9357,26 @@ class Scheduler(PollScheduler):
 			prefetcher=self._prefetchers.get(pkg),
 			scheduler=self._sched_iface,
 			settings=self._allocate_config(pkg.root),
+			statusMessage=self._status_msg,
 			world_atom=self._world_atom)
 
 		return task
 
+	def _status_msg(self, msg):
+		"""
+		Display a brief status message (no newlines) in the status display.
+		This is called by tasks to provide feedback to the user. This
+		delegates the resposibility of generating \r and \n control characters,
+		to guarantee that lines are created or erased when necessary and
+		appropriate.
+
+		@type msg: str
+		@param msg: a brief status message (no newlines allowed)
+		"""
+
+		# TODO: Let self._status_display handle this.
+		portage.util.writemsg_level(">>> %s\n" % msg, noiselevel=-1)
+
 	def _save_resume_list(self):
 		"""
 		Do this before verifying the ebuild Manifests since it might