cdxdoc

cat : Concatenate Files

USAGE : cdx cat [options...] [files...]

Combine files, one after the other. Do the right thing with file headers.

Command Line Options

-h	–header=Mode	Header requirements. See below.
-p	–pad=Mode>	Add trailing newline if absent. See below.
-n	–number=Name[,Start[,Where]]	Number the lines in column ‘Name’, starting at number ‘Start’, ‘Where’ can be ‘begin’ or ‘end’
-b	–begin	Shortcut for --number number,1,begin
-e	–end	Shortcut for --number number,1,end
-r	–remove=Matcher	Remove lines that match. Most useful matchers are: Empty, Blank, Hash, Slash
-s	–skip=Matcher	Do not number lines that match.

Header Mode

The header mode dictates what file headers are expected, and what to do when files don’t match each other

• Match – First file can be anything, all other files must match the first one. This is the default.
• Require – All files must have identical CDX headers
• Strip – Strip CDX headers if present
• None – The presence of a CDX header is an error
• Trust – Strip CDX headers from all but first file. Trust that the data is compatible.
• Ignore – Treat CDX Headers just like any other line of data

Pad Mode

What to do if files don’t end with a newline

• Yes - Always append a newline if one isn’t present. This is the default.
• No - Never append a newline.
• End - Appen a newline to the last file, if necessary.

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