mirror of
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92 lines
2.2 KiB
XML
92 lines
2.2 KiB
XML
<?xml version="1.0"?>
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<!--
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Copyright The SCons Foundation
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This file is processed by the bin/SConsDoc.py module.
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See its __doc__ string for a discussion of the format.
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-->
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<!DOCTYPE sconsdoc [
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<!ENTITY % scons SYSTEM '../../doc/scons.mod'>
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%scons;
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<!ENTITY % builders-mod SYSTEM '../../doc/generated/builders.mod'>
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%builders-mod;
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<!ENTITY % functions-mod SYSTEM '../../doc/generated/functions.mod'>
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%functions-mod;
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<!ENTITY % tools-mod SYSTEM '../../doc/generated/tools.mod'>
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%tools-mod;
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<!ENTITY % variables-mod SYSTEM '../../doc/generated/variables.mod'>
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%variables-mod;
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]>
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<sconsdoc xmlns="http://www.scons.org/dbxsd/v1.0"
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xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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xsi:schemaLocation="http://www.scons.org/dbxsd/v1.0 http://www.scons.org/dbxsd/v1.0/scons.xsd">
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<scons_function name="FindPathDirs">
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<arguments signature="global">
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(variable)
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</arguments>
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<summary>
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<para>
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Returns a function
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(actually a callable Python object)
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intended to be used as the
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<varname>path_function</varname>
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of a Scanner object.
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The returned object will look up the specified
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<varname>variable</varname>
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in a construction environment
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and treat the construction variable's value as a list of
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directory paths that should be searched
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(like
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&cv-link-CPPPATH;,
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&cv-link-LIBPATH;,
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etc.).
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</para>
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<para>
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Note that use of
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&f-FindPathDirs;
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is generally preferable to
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writing your own
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<varname>path_function</varname>
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for the following reasons:
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1) The returned list will contain all appropriate directories
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found in source trees
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(when
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&f-link-VariantDir;
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is used)
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or in code repositories
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(when
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&f-Repository;
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or the
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<option>-Y</option>
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option are used).
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2) scons will identify expansions of
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<varname>variable</varname>
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that evaluate to the same list of directories as,
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in fact, the same list,
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and avoid re-scanning the directories for files,
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when possible.
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</para>
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<para>
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Example:
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</para>
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<example_commands>
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def my_scan(node, env, path, arg):
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# Code to scan file contents goes here...
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return include_files
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scanner = Scanner(name = 'myscanner',
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function = my_scan,
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path_function = FindPathDirs('MYPATH'))
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</example_commands>
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</summary>
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</scons_function>
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</sconsdoc>
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