This is the command notmuch-count that can be run in the OnWorks free hosting provider using one of our multiple free online workstations such as Ubuntu Online, Fedora Online, Windows online emulator or MAC OS online emulator
PROGRAM:
NAME
notmuch-count - count messages matching the given search terms
SYNOPSIS
notmuch count [option ...] <search-term> ...
DESCRIPTION
Count messages matching the search terms.
The number of matching messages (or threads) is output to stdout.
With no search terms, a count of all messages (or threads) in the database will be
displayed.
See notmuch-search-terms(7) for details of the supported syntax for <search-terms>.
Supported options for count include
--output=(messages|threads|files)
messages
Output the number of matching messages. This is the default.
threads
Output the number of matching threads.
files Output the number of files associated with matching messages. This may be
bigger than the number of matching messages due to duplicates (i.e. multiple
files having the same message-id).
--exclude=(true|false)
Specify whether to omit messages matching search.tag_exclude from the count (the
default) or not.
--batch
Read queries from a file (stdin by default), one per line, and output the number
of matching messages (or threads) to stdout, one per line. On an empty input
line the count of all messages (or threads) in the database will be output. This
option is not compatible with specifying search terms on the command line.
--lastmod
Append lastmod (counter for number of database updates) and UUID to the output.
lastmod values are only comparable between databases with the same UUID.
--input=<filename>
Read input from given file, instead of from stdin. Implies --batch.
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