On Fri, Mar 19, 2004 at 12:15:03PM -0500, Jeff Johnson wrote:
>
> Hehe, see, even I can't remember header extensions ;-)
>
> Thanks for the correction, I looked at rpmlib.h, not --querytags.
>
> If there *is* a trigger type extension, it's used in exactly one place,
> rpm -q --scripts display output from /usr/lib/rpm/rpmpopt*.
>
> That means that h.sprintf() (think: same as --queryformat arg but in python)
> rather than h['xxx'] might have to be used top retrieve the value instead.
>
> 73 de Jeff
OK, so
#!/usr/bin/python
import rpm,sys
tn = rpm.tagnames
ts = rpm.TransactionSet()
mi = ts.dbMatch('name', 'termcap')
h = mi.next()
for tagname in ['FOOBAR', 'PREUNPROG', 'VENDOR', 'TRIGGERTYPE']:
if tagname in tn.values():
print "%s is a tagname" % tagname
for key in tn.keys():
if tn[key] == tagname:
print "%s key is %d" % (tagname,key)
ttkey = key
break
else:
print "%s is not a tagname" % tagname
continue
if ttkey in h.keys():
print "keys include %s's" % tagname
else:
print "keys do not include %s's" % tagname
continue
print "tn[ttkey] is %s" % tn[ttkey]
print "\"%%%%{%%s}\" %% tn[ttykey] is %s" % ("%%{%s}" % tn[ttkey])
print "h.sprintf(\"%%%%{%%s}\" %% tn[ttkey]) is %s" % h.sprintf("%%{%s}" % tn[ttkey])
yields
FOOBAR is not a tagname
PREUNPROG is a tagname
PREUNPROG key is 1087
keys do not include PREUNPROG's
VENDOR is a tagname
VENDOR key is 1011
keys include VENDOR's
tn[ttkey] is VENDOR
"%%{%s}" % tn[ttykey] is %{VENDOR}
h.sprintf("%%{%s}" % tn[ttkey]) is Red Hat, Inc.
TRIGGERTYPE is a tagname
TRIGGERTYPE key is 1146
keys include TRIGGERTYPE's
tn[ttkey] is TRIGGERTYPE
"%%{%s}" % tn[ttykey] is %{TRIGGERTYPE}
h.sprintf("%%{%s}" % tn[ttkey]) is (none)
Thus, it appears that a bunch of RPMS are getting a None (or
null of some form) stuffed into TRIGGERTYPE.
Thanks, that answers my immediate question, and gives me a way
to iterate through all the header tags without it barfing, [1]
although I suppose that for the long term y'all might want to
wonder why this (none) thing is happening at all...
--Bob
[1] not that I wanted to do this on a regular basis, I was
developing something else and was just doing that to help me
understand what all was in there...
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