Rexpy¶
The rexpy
command¶
rexpy [FLAGS] [inputfile [outputfile]]
If inputfile
is provided, it should contain one string per line;
otherwise lines will be read from standard input.
If outputfile
is provided, regular expressions found will be written
to that (one per line); otherwise they will be printed.
Optional FLAGS
may be used to modify Rexpy’s behaviour:
-h
,--header
- Discard first line, as a header.
-?
,--help
- Print this usage information and exit (without error)
-g
,--group
Generate capture groups for each variable fragment of each regular expression generated, i.e. surround variable components with parentheses, e.g.
^[A-Z]+\-[0-9]+$
becomes
^([A-Z]+)\-([0-9]+)$
-q
,--quote
Display the resulting regular expressions as double-quoted, escaped strings, in a form broadly suitable for use in Unix shells, JSON, and string literals in many programming languages. e.g.
^[A-Z]+\-[0-9]+$
becomes
"^[A-Z]+\\-[0-9]+$"
--portable
- Product maximally portable regular expressions (e.g.
[0-9]
rather than\d
). (This is the default.)--grep
- Same as
--portable
--java
- Produce Java-style regular expressions (e.g.
\p{Digit}
)--posix
- Produce POSIX-compilant regular expressions (e.g.
[[:digit:]]
rather than\d
).--perl
- Produce Perl-style regular expressions (e.g.
\d
)-u
,--underscore
,-_
- Allow underscore to be treated as a letter. Mostly useful for matching identifiers.
-d
,--dot
,-.
,--period
- Allow dot to be treated as a letter. Mostly useful for matching identifiers.
-m
,--minus
,--hyphen
,--dash
- Allow minus to be treated as a letter. Mostly useful for matching identifiers.
-v
,--version
- Print the version number.
-V
,--verbose
- Set verbosity level to 1
-VV
,--Verbose
- Set verbosity level to 2
-vlf
,--variable
- Use variable length fragments
-flf
,--fixed
- Use fixed length fragments
Rexpy Examples¶
TDDA rexpy is supplied with a set of examples.
To copy the rexpy examples, run the command:
tdda examples rexpy [directory]
If directory
is not supplied, rexpy_examples
will be used.
Alternatively, you can copy all examples using the following command:
tdda examples
which will create a number of separate subdirectories.