lib: implement basic task progress support

For long-running tasks where we have some output from the task that
gives us some idea of the progress of the task (such as a percentage
complete), provide the means to scrape the output for that progress
information and show it to the user in the default knotty terminal
output in the form of a progress bar. This is implemented using a new
TaskProgress event as well as some code we can insert to do output
scanning/filtering.

Any task can fire TaskProgress events; however, if you have a shell task
whose output you wish to scan for progress information, you just need to
set the "progress" varflag on the task. This can be set to:
 * "percent" to just look for a number followed by a % sign
 * "percent:<regex>" to specify your own regex matching a percentage
   value (must have a single group which matches the percentage number)
 * "outof:<regex>" to look for the specified regex matching x out of y
   items completed (must have two groups - first group needs to be x,
   second y).
We can potentially extend this in future but this should be a good
start.

Part of the implementation for [YOCTO #5383].

Signed-off-by: Paul Eggleton <paul.eggleton@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 6 insertions, 1 deletions

diff --git a/lib/bb/ui/uihelper.py b/lib/bb/ui/uihelper.py
index db70b763f..1915e4770 100644
--- a/lib/bb/ui/uihelper.py
+++ b/lib/bb/ui/uihelper.py
@@ -18,6 +18,7 @@
 # 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 
 import bb.build
+import time
 
 class BBUIHelper:
     def __init__(self):
@@ -31,7 +32,7 @@ class BBUIHelper:
 
     def eventHandler(self, event):
         if isinstance(event, bb.build.TaskStarted):
-            self.running_tasks[event.pid] = { 'title' : "%s %s" % (event._package, event._task) }
+            self.running_tasks[event.pid] = { 'title' : "%s %s" % (event._package, event._task), 'starttime' : time.time() }
             self.running_pids.append(event.pid)
             self.needUpdate = True
         if isinstance(event, bb.build.TaskSucceeded):
@@ -52,6 +53,10 @@ class BBUIHelper:
             self.tasknumber_current = event.stats.completed + event.stats.active + event.stats.failed + 1
             self.tasknumber_total = event.stats.total
             self.needUpdate = True
+        if isinstance(event, bb.build.TaskProgress):
+            self.running_tasks[event.pid]['progress'] = event.progress
+            self.running_tasks[event.pid]['rate'] = event.rate
+            self.needUpdate = True
 
     def getTasks(self):
         self.needUpdate = False