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@pindex msgcat
@cindex @code{msgcat} program, usage
@example
msgcat [@var{option}] [@var{inputfile}]...
@end example
@cindex concatenate PO files
@cindex merge PO files
The @code{msgcat} program concatenates and merges the specified PO files.
It finds messages which are common to two or more of the specified PO files.
By using the @code{--more-than} option, greater commonality may be requested
before messages are printed. Conversely, the @code{--less-than} option may be
used to specify less commonality before messages are printed (i.e.
@samp{--less-than=2} will only print the unique messages). Translations,
comments and extract comments will be cumulated, except that if
@code{--use-first} is specified, they will be taken from the first PO file
to define them. File positions from all PO files will be cumulated.
@subsection Input file location
@table @samp
@item @var{inputfile} @dots{}
Input files.
@item -f @var{file}
@itemx --files-from=@var{file}
@opindex -f@r{, @code{msgcat} option}
@opindex --files-from@r{, @code{msgcat} option}
Read the names of the input files from @var{file} instead of getting
them from the command line.
@item -D @var{directory}
@itemx --directory=@var{directory}
@opindex -D@r{, @code{msgcat} option}
@opindex --directory@r{, @code{msgcat} option}
Add @var{directory} to the list of directories. Source files are
searched relative to this list of directories. The resulting @file{.po}
file will be written relative to the current directory, though.
@end table
If @var{inputfile} is @samp{-}, standard input is read.
@subsection Output file location
@table @samp
@item -o @var{file}
@itemx --output-file=@var{file}
@opindex -o@r{, @code{msgcat} option}
@opindex --output-file@r{, @code{msgcat} option}
Write output to specified file.
@end table
@cindex standard output, and @code{msgcat}
The results are written to standard output if no output file is specified
or if it is @samp{-}.
@subsection Message selection
@table @samp
@item -< @var{number}
@itemx --less-than=@var{number}
@opindex -<@r{, @code{msgcat} option}
@opindex --less-than@r{, @code{msgcat} option}
Print messages with less than @var{number} definitions, defaults to infinite
if not set.
@item -> @var{number}
@itemx --more-than=@var{number}
@opindex ->@r{, @code{msgcat} option}
@opindex --more-than@r{, @code{msgcat} option}
Print messages with more than @var{number} definitions, defaults to 0 if not
set.
@item -u
@itemx --unique
@opindex -u@r{, @code{msgcat} option}
@opindex --unique@r{, @code{msgcat} option}
Shorthand for @samp{--less-than=2}. Requests that only unique messages be
printed.
@end table
@subsection Output details
@c --no-escape and --escape omitted on purpose. They are not useful.
@table @samp
@item -t
@itemx --to-code=@var{name}
@opindex -t@r{, @code{msgcat} option}
@opindex --to-code@r{, @code{msgcat} option}
Specify encoding for output.
@item --use-first
@opindex --use-first@r{, @code{msgcat} option}
Use first available translation for each message. Don't merge several
translations into one.
@item --force-po
@opindex --force-po@r{, @code{msgcat} option}
Always write an output file even if it contains no message.
@item -i
@itemx --indent
@opindex -i@r{, @code{msgcat} option}
@opindex --indent@r{, @code{msgcat} option}
Write the .po file using indented style.
@item --no-location
@opindex --no-location@r{, @code{msgcat} option}
Do not write @samp{#: @var{filename}:@var{line}} lines.
@item -n
@itemx --add-location
@opindex -n@r{, @code{msgcat} option}
@opindex --add-location@r{, @code{msgcat} option}
Generate @samp{#: @var{filename}:@var{line}} lines (default).
@item --strict
@opindex --strict@r{, @code{msgcat} option}
Write out a strict Uniforum conforming PO file. Note that this
Uniforum format should be avoided because it doesn't support the
GNU extensions.
@item -w @var{number}
@itemx --width=@var{number}
@opindex -w@r{, @code{msgcat} option}
@opindex --width@r{, @code{msgcat} option}
Set the output page width. Long strings in the output files will be
split across multiple lines in order to ensure that each line's width
(= number of screen columns) is less or equal to the given @var{number}.
@item -s
@itemx --sort-output
@opindex -s@r{, @code{msgcat} option}
@opindex --sort-output@r{, @code{msgcat} option}
@cindex sorting @code{msgcat} output
Generate sorted output. Note that using this option makes it much harder
for the translator to understand each message's context.
@item -F
@itemx --sort-by-file
@opindex -F@r{, @code{msgcat} option}
@opindex --sort-by-file@r{, @code{msgcat} option}
Sort output by file location.
@end table
@subsection Informative output
@table @samp
@item -h
@itemx --help
@opindex -h@r{, @code{msgcat} option}
@opindex --help@r{, @code{msgcat} option}
Display this help and exit.
@item -V
@itemx --version
@opindex -V@r{, @code{msgcat} option}
@opindex --version@r{, @code{msgcat} option}
Output version information and exit.
@end table
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