GUARDS(1) User Contributed Perl Documentation GUARDS(1)NAME
guards - select from a list of files guarded by conditions
SYNOPSIS
guards [--prefix=dir] [--path=dir2:dir2:...] [--default=0|1] [-v|--invert-match] [--list|--check] [--config=file] symbol ...
DESCRIPTION
The script reads a configuration file that may contain so-called guards, file names, and comments, and writes those file names that satisfy
all guards to standard output. The script takes a list of symbols as its arguments. Each line in the configuration file is processed
separately. Lines may start with a number of guards. The following guards are defined:
+xxx Include the file(s) on this line if the symbol xxx is defined.
-xxx Exclude the file(s) on this line if the symbol xxx is defined.
+!xxx Include the file(s) on this line if the symbol xxx is not defined.
-!xxx Exclude the file(s) on this line if the symbol xxx is not defined.
- Exclude this file. Used to avoid spurious --check messages.
The guards are processed left to right. The last guard that matches determines if the file is included. If no guard is specified, the
--default setting determines if the file is included.
If no configuration file is specified, the script reads from standard input.
The --check option is used to compare the specification file against the file system. If files are referenced in the specification that do
not exist, or if files are not enlisted in the specification file warnings are printed. The --path option can be used to specify which
directory or directories to scan. Multiple directories are separated by a colon (":") character. The --prefix option specifies the
location of the files.
AUTHOR
Andreas Gruenbacher <agruen@suse.de> (SuSE Linux AG)
perl v5.14.2 2012-03-04 GUARDS(1)
Check Out this Related Man Page
tcldocstrip(1) General Commands Manual tcldocstrip(1)__________________________________________________________________________________________________________________________________________________NAME
tcldocstrip - Tcl-based Docstrip Processor
SYNOPSIS
tcldocstrip output ?options? input ?guards?
tcldocstrip ?options? output (?options? input guards)...
tcldocstrip -guards input
_________________________________________________________________DESCRIPTION
The application described by this document, tcldocstrip, is a relative of docstrip, a simple literate programming tool for LaTeX.
tcldocstrip is based upon the package docstrip.
USE CASES
tcldocstrip was written with the following three use cases in mind.
[1] Conversion of a single input file according to the listed guards into the stripped output. This handles the most simple case of a
set of guards specifying a single document found in a single input file.
[2] Stitching, or the assembly of an output from several sets of guards, in a specific order, and possibly from different files. This is
the second common case. One document spread over several inputs, and/or spread over different guard sets.
[3] Extraction and listing of all the unique guard expressions and guards used within a document to help a person which did not author
the document in question in familiarizing itself with it.
COMMAND LINE
tcldocstrip output ?options? input ?guards?
This is the form for use case [1]. It converts the input file according to the specified guards and options. The result is written
to the named output file. Usage of the string - as the name of the output signals that the result should be written to stdout. The
guards are document-specific and have to be known to the caller. The options will be explained later, in section OPTIONS.
path output (in)
This argument specifies where to write the generated document. It can be the path to a file or directory, or -. The last
value causes the application to write the generated documented to stdout.
If the output does not exist then [file dirname $output] has to exist and must be a writable directory.
path inputfile (in)
This argument specifies the path to the file to process. It has to exist, must be readable, and written in docstrip format.
tcldocstrip ?options? output (?options? input guards)...
This is the form for use case [2]. It differs from the form for use case [1] by the possibility of having options before the output
file, which apply in general, and specifying more than one inputfile, each with its own set of input specific options and guards.
It extracts data from the various input files, according to the specified options and guards, and writes the result to the given
output, in the order of their specification on the command line. Options specified before the output are global settings, whereas
the options specified before each input are valid only just for this input file. Unspecified values are taken from the global set-
tings, or defaults. As for form [1] using the string - as output causes the application to write to stdout. Using the string . for
an input file signals that the last input file should be used again. This enables the assembly of the output from one input file
using multiple and different sets of guards, without having to specify the full name of the file every time.
tcldocstrip -guards input
This is the form for use case [3]. It determines the guards, and unique guard expressions used within the provided input document.
The found strings are written to stdout, one string per line.
OPTIONS
This section describes all the options available to the user of the application, with the exception of the option -guards. This option was
described already, in section COMMAND LINE.
-metaprefix string
This option is inherited from the command docstrip::extract provided by the package docstrip.
It specifies the string by which the '%%' prefix of a metacomment line will be replaced. Defaults to '%%'. For Tcl code this would
typically be '#'.
-onerror mode
This option is inherited from the command docstrip::extract provided by the package docstrip.
It controls what will be done when a format error in the text being processed is detected. The settings are:
ignore Just ignore the error; continue as if nothing happened.
puts Write an error message to stderr, then continue processing.
throw Throw an error. ::errorCode is set to a list whose first element is DOCSTRIP, second element is the type of error, and third
element is the line number where the error is detected. This is the default.
-trimlines bool
This option is inherited from the command docstrip::extract provided by the package docstrip.
Controls whether spaces at the end of a line should be trimmed away before the line is processed. Defaults to true.
-preamble text
-postamble text
-nopreamble
-nopostamble
The -no*amble options deactivate file pre- and postambles altogether, whereas the -*amble options specify the user part of the file
pre- and postambles. This part can be empty, in that case only the standard parts are shown. This is the default.
Preambles, when active, are written before the actual content of a generated file. In the same manner postambles are, when active,
written after the actual content of a generated file.
BUGS, IDEAS, FEEDBACK
This document, and the application it describes, will undoubtedly contain bugs and other problems. Please report such in the category doc-
strip of the Tcllib SF Trackers [http://sourceforge.net/tracker/?group_id=12883]. Please also report any ideas for enhancements you may
have for either application and/or documentation.
SEE ALSO
docstrip
KEYWORDS
.dtx, LaTeX, conversion, docstrip, documentation, literate programming, markup, source
CATEGORY
Documentation tools
COPYRIGHT
Copyright (c) 2005 Andreas Kupries <andreas_kupries@users.sourceforge.net>
Textprocessing toolbox 1.0 tcldocstrip(1)