ui/knotty: Add a footer to the build output for interactive terminals as knotty2 UI

On terminals which support it, add summary information to the end of the
build output about the number of tasks currently running and how many tasks
we've run so far.

This provides a summary at a glace of what the current state of the build is
and what the build is currently doing which is lacking in the current UI.

Also disable echo of characters on stdin since this corrupts the disable,
particularly Crtl+C.

The "waiting for X tasks" code can be merged into this code too since
that is only useful on interactive terminals and this improves the
readability of that output too.

Improvements since v0:

* The tasks are ordered in execution order.
* The display is only updated when the list of tasks changes or there
  is output above the footer.
* Running task x oy y and package messages are supressed from the console

This UI can be accessed with "bitbake -u knotty2".

(From Poky rev: e38b4569648f2916c4370871c79e6a6090eb8bc1)

(Bitbake rev: 156189c799d2bb1f69bdaa04b5cd718fe7881425)

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 109 insertions, 0 deletions

diff --git a/bitbake/lib/bb/ui/knotty2.py b/bitbake/lib/bb/ui/knotty2.py
new file mode 100644
index 0000000000..aa6a4080e2
--- /dev/null
+++ b/bitbake/lib/bb/ui/knotty2.py
@@ -0,0 +1,109 @@
+#
+# BitBake (No)TTY UI Implementation (v2)
+#
+# Handling output to TTYs or files (no TTY)
+#
+# Copyright (C) 2012 Richard Purdie
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License version 2 as
+# published by the Free Software Foundation.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License along
+# with this program; if not, write to the Free Software Foundation, Inc.,
+# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+
+from bb.ui import knotty
+import logging
+import sys
+logger = logging.getLogger("BitBake")
+
+class InteractConsoleLogFilter(logging.Filter):
+    def __init__(self, tf, format):
+        self.tf = tf
+        self.format = format
+
+    def filter(self, record):
+        if record.levelno == self.format.NOTE and (record.msg.startswith("Running") or record.msg.startswith("package ")):
+            return False
+        self.tf.clearFooter()
+        return True
+
+class TerminalFilter2(object):
+    def __init__(self, main, helper, console, format):
+        self.main = main
+        self.helper = helper
+        self.cuu = None
+        self.stdinbackup = None
+        self.interactive = sys.stdout.isatty()
+        self.footer_present = False
+        self.lastpids = []
+
+        if not self.interactive:
+            return
+
+        import curses
+        import termios
+        import copy
+        self.curses = curses
+        self.termios = termios
+        try:
+            fd = sys.stdin.fileno()
+            self.stdinbackup = termios.tcgetattr(fd)
+            new = copy.deepcopy(self.stdinbackup)
+            new[3] = new[3] & ~termios.ECHO
+            termios.tcsetattr(fd, termios.TCSADRAIN, new)
+            curses.setupterm()
+            self.ed = curses.tigetstr("ed")
+            if self.ed:
+                self.cuu = curses.tigetstr("cuu")
+        except:
+            self.cuu = None
+        console.addFilter(InteractConsoleLogFilter(self, format))
+
+    def clearFooter(self):
+        if self.footer_present:
+            lines = self.footer_present
+            sys.stdout.write(self.curses.tparm(self.cuu, lines))
+            sys.stdout.write(self.curses.tparm(self.ed))
+        self.footer_present = False
+
+    def updateFooter(self):
+        if not self.cuu:
+            return
+        activetasks = self.helper.running_tasks
+        failedtasks = self.helper.failed_tasks
+        runningpids = self.helper.running_pids
+        if self.footer_present and (self.lastpids == runningpids):
+            return
+        if self.footer_present:
+            self.clearFooter()
+        if not activetasks:
+            return
+        lines = 1
+        tasks = []
+        for t in runningpids:
+            tasks.append("%s (pid %s)" % (activetasks[t]["title"], t))
+
+        if self.main.shutdown:
+            print("Waiting for %s running tasks to finish:" % len(activetasks))
+        else:
+            print("Currently %s running tasks (%s of %s):" % (len(activetasks), self.helper.tasknumber_current, self.helper.tasknumber_total))
+        for tasknum, task in enumerate(tasks):
+            print("%s: %s" % (tasknum, task))
+            lines = lines + 1
+        self.footer_present = lines
+        self.lastpids = runningpids[:]
+
+    def finish(self):
+        if self.stdinbackup:
+            fd = sys.stdin.fileno()
+            self.termios.tcsetattr(fd, self.termios.TCSADRAIN, self.stdinbackup)
+
+def main(server, eventHandler):
+    bb.ui.knotty.main(server, eventHandler, TerminalFilter2)