11-25-2011
awk - use fields from subsequent lines
I've run into a problem getting exactly what I want out of awk - some folks may recognize this as an output from Amazon's ec2-describe-instances:
Given the following:
INSTANCE i-4960f321
BLOCKDEVICE Line2Var2
TAG instance i-4960f321 Name web1
TAG instance i-4960f321 aws:autoscaling:groupName web1asg
INSTANCE i-4960f322
BLOCKDEVICE Line6Var2
TAG instance i-4960f322 Name web2
TAG instance i-4960f322 aws:autoscaling:groupName web2asg
INSTANCE i-4960f320
BLOCKDEVICE Line10Var2
TAG instance i-4960f320 Name app1
The desired output is:
$2 (from the INSTANCE line), $5 (from the first TAG line) or NULL, $5 (from the second TAG line) or NULL.
Example:
i-4960f321 web1 web1asg
i-4960f322 web2 web2asg
i-4960f320 app1 NULL
CJ
P.S. If folks are interested, if I find something helpful here I'm planning on using for a suite of Amazon Web Service related tools called aws missing tools (Google for it - fourth link).
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notmuch-tag
NOTMUCH-TAG(1) General Commands Manual NOTMUCH-TAG(1)
NAME
notmuch-tag - Add/remove tags for all messages matching the search terms.
SYNOPSIS
notmuch tag +<tag>|-<tag> [...] [--] <search-term>...
DESCRIPTION
Add/remove tags for all messages matching the search terms.
See notmuch-search-terms(7) for details of the supported syntax for <search-terms>.
Tags prefixed by '+' are added while those prefixed by '-' are removed. For each message, tag removal is performed before tag addition.
The beginning of <search-terms> is recognized by the first argument that begins with neither '+' nor '-'. Support for an initial search
term beginning with '+' or '-' is provided by allowing the user to specify a "--" argument to separate the tags from the search terms.
notmuch tag updates the maildir flags according to tag changes if the maildir.synchronize_flags configuration option is enabled. See not-
much-config(1) for details.
SEE ALSO
notmuch(1), notmuch-config(1), notmuch-count(1), notmuch-dump(1), notmuch-hooks(5), notmuch-new(1), notmuch-reply(1), notmuch-restore(1),
notmuch-search(1), notmuch-search-terms(7), notmuch-show(1),
Notmuch 0.13.2 2012-06-01 NOTMUCH-TAG(1)