yum 3.0.1 generates redundant progress output while installing
packages: rpm calls back into yum for every file it touches, which
causes yum to refresh the progress indicator even if neither the
percentage nor the hash marks have changed.
When installing a package with ~23000 files (a complete kernel source
tree), yum writes about 1.8 Mbytes to stdout. This is pretty painful
when SSHing over a slow link or even when working locally using a
fancy terminal like the xemacs shell.
The attached patch suppresses redundant progress updates but does not
otherwise alter any functionality. With the patch, yum generates only
3756 bytes to stdout when installing the same package, a savings of
approximately 100% :-)
Feedback welcome.
--Ed
--- ../../usr/share/yum-cli/callback.py 2006-11-10 08:59:10.000000000 -0800
+++ /usr/share/yum-cli/callback.py 2007-01-25 13:16:08.000000000 -0800
@@ -33,6 +33,7 @@
self.total_removed = 0
self.mark = "#"
self.marks = 27
+ self.lastmsg = None
self.logger = logging.getLogger('yum.filelogging.RPMInstallCallback')
self.myprocess = { TS_UPDATE : 'Updating',
@@ -106,6 +107,7 @@
pass
elif what == rpm.RPMCALLBACK_INST_OPEN_FILE:
+ self.lastmsg = None
hdr = None
if h is not None:
hdr, rpmloc = h
@@ -157,9 +159,11 @@
msg = fmt % ('Repackage', h)
if bytes == total:
msg = msg + "\n"
-
- sys.stdout.write(msg)
- sys.stdout.flush()
+
+ if msg != self.lastmsg:
+ sys.stdout.write(msg)
+ sys.stdout.flush()
+ self.lastmsg = msg
else:
hdr, rpmloc = h
if total == 0:
@@ -179,8 +183,10 @@
if self.output and (sys.stdout.isatty() or bytes == total):
fmt = self._makefmt(percent)
msg = fmt % (process, hdr['name'])
- sys.stdout.write(msg)
- sys.stdout.flush()
+ if msg != self.lastmsg:
+ sys.stdout.write(msg)
+ sys.stdout.flush()
+ self.lastmsg = msg
if bytes == total:
print " "
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