TaskGen¶
Task generators
The class waflib.TaskGen.task_gen
encapsulates the creation of task objects (low-level code)
The instances can have various parameters, but the creation of task nodes (Task.py)
is deferred. To achieve this, various methods are called from the method “apply”
-
waflib.TaskGen.
feats
= {'*': {'process_rule', 'process_source'}, 'asm': {'propagate_uselib_vars', 'apply_link', 'apply_nasm_vars', 'apply_incpaths'}, 'c': {'process_use', 'propagate_uselib_vars', 'set_macosx_deployment_target', 'apply_incpaths', 'apply_link', 'apply_flags_msvc'}, 'cprogram': {'create_task_macapp', 'apply_manifest', 'set_full_paths_hpux', 'create_task_macplist'}, 'cs': {'doc_cs', 'propagate_uselib_vars', 'use_cs', 'apply_cs', 'debug_cs'}, 'cshlib': {'apply_implib', 'apply_vnum', 'apply_bundle', 'apply_manifest'}, 'cxx': {'process_use', 'propagate_uselib_vars', 'set_macosx_deployment_target', 'apply_incpaths', 'apply_link', 'apply_flags_msvc'}, 'cxxprogram': {'create_task_macapp', 'apply_manifest', 'set_full_paths_hpux', 'create_task_macplist'}, 'cxxshlib': {'apply_implib', 'apply_vnum', 'apply_bundle', 'apply_manifest'}, 'd': {'process_header', 'process_use', 'propagate_uselib_vars', 'apply_incpaths', 'apply_link'}, 'dshlib': {'apply_vnum'}, 'fake_lib': {'process_lib'}, 'fake_obj': {'process_objs'}, 'fc': {'process_use', 'propagate_uselib_vars', 'apply_incpaths', 'apply_flags_ifort', 'apply_link'}, 'fcprogram': {'apply_manifest_ifort'}, 'fcprogram_test': {'apply_manifest_ifort'}, 'fcshlib': {'apply_manifest_ifort', 'apply_vnum', 'apply_implib'}, 'glib2': {'process_settings'}, 'grep_for_endianness': {'grep_for_endianness_fun'}, 'gresource': {'process_gresource_bundle'}, 'includes': {'apply_incpaths'}, 'install_task': {'process_install_task'}, 'intltool_in': {'apply_intltool_in_f'}, 'intltool_po': {'apply_intltool_po'}, 'jar': {'use_jar_files', 'jar_files'}, 'javac': {'propagate_uselib_vars', 'apply_java', 'set_classpath', 'use_javac_files'}, 'javadoc': {'create_javadoc'}, 'link_lib_test': {'link_lib_test_fun'}, 'link_main_routines_func': {'link_main_routines_tg_method'}, 'perlext': {'init_perlext'}, 'py': {'feature_py'}, 'pyembed': {'init_pyembed'}, 'pyext': {'init_pyext', 'set_bundle', 'set_lib_pat'}, 'qt5': {'apply_qt5', 'process_mocs'}, 'rubyext': {'apply_ruby_so_name', 'init_rubyext'}, 'seq': {'sequence_order'}, 'skip_stlib_link_deps': {'apply_skip_stlib_link_deps'}, 'subst': {'process_subst'}, 'test': {'make_test'}, 'test_exec': {'test_exec_fun'}, 'test_scripts': {'make_interpreted_test'}, 'tex': {'apply_tex'}, 'use': {'process_use'}, 'uselib': {'propagate_uselib_vars'}, 'vnum': {'apply_vnum'}, 'winapp': {'make_windows_app'}, 'winphoneapp': {'make_winphone_app'}}¶ remember the methods declaring features
-
class
waflib.TaskGen.
task_gen
(*k, **kw)[source]¶ Bases:
object
Instances of this class create
waflib.Task.Task
when calling the methodwaflib.TaskGen.task_gen.post()
from the main thread. A few notes:- The methods to call (self.meths) can be specified dynamically (removing, adding, ..)
- The ‘features’ are used to add methods to self.meths and then execute them
- The attribute ‘path’ is a node representing the location of the task generator
- The tasks created are added to the attribute tasks
- The attribute ‘idx’ is a counter of task generators in the same path
-
mappings
= {'.ASM': <function asm_hook at 0x7f75c3b6d048>, '.C': <function cxx_hook at 0x7f75c3ad81e0>, '.D': <function d_hook at 0x7f75c3b6a730>, '.F': <function fc_hook at 0x7f75c39f0488>, '.F03': <function fc_hook at 0x7f75c39f0488>, '.F08': <function fc_hook at 0x7f75c39f0488>, '.F90': <function fc_hook at 0x7f75c39f0488>, '.F95': <function fc_hook at 0x7f75c39f0488>, '.FOR': <function fc_hook at 0x7f75c39f0488>, '.S': <function asm_hook at 0x7f75c3b6d048>, '.SPP': <function asm_hook at 0x7f75c3b6d048>, '.asm': <function asm_hook at 0x7f75c3b6d048>, '.c': <function c_hook at 0x7f75c3b6d950>, '.c++': <function cxx_hook at 0x7f75c3acf950>, '.cc': <function cxx_hook at 0x7f75c3ad81e0>, '.cpp': <function cxx_hook at 0x7f75c3ad81e0>, '.cxx': <function cxx_hook at 0x7f75c3ad81e0>, '.d': <function d_hook at 0x7f75c3b6a730>, '.di': <function d_hook at 0x7f75c3b6a730>, '.f': <function fc_hook at 0x7f75c39f0488>, '.f03': <function fc_hook at 0x7f75c39f0488>, '.f08': <function fc_hook at 0x7f75c39f0488>, '.f90': <function fc_hook at 0x7f75c39f0488>, '.f95': <function fc_hook at 0x7f75c39f0488>, '.for': <function fc_hook at 0x7f75c39f0488>, '.gresource.xml': <function process_gresource_source at 0x7f75c3a04510>, '.gs': <function vala_file at 0x7f75c3c76620>, '.l': <function declare_chain.<locals>.x_file at 0x7f75c3be3510>, '.lua': <function add_lua at 0x7f75c3b4cb70>, '.o': <function add_those_o_files at 0x7f75c3c6b510>, '.obj': <function add_those_o_files at 0x7f75c3c6b510>, '.pc.in': <function add_pcfile at 0x7f75c67be400>, '.py': <function process_py at 0x7f75c3af60d0>, '.qrc': <function create_rcc_task at 0x7f75c3ad8048>, '.rb': <function process at 0x7f75c3ba4e18>, '.rc': <function rc_file at 0x7f75c3c6bea0>, '.s': <function asm_hook at 0x7f75c3b6d048>, '.spp': <function asm_hook at 0x7f75c3b6d048>, '.ts': <function add_lang at 0x7f75c3ad8158>, '.ui': <function create_uic_task at 0x7f75c3ad80d0>, '.vala': <function vala_file at 0x7f75c3c76620>, '.vapi': <function vapi_file at 0x7f75c3c766a8>, '.xs': <function xsubpp_file at 0x7f75c3b056a8>, '.y': <function big_bison at 0x7f75c3bf4bf8>, '.yc': <function big_bison at 0x7f75c3bf4bf8>, '.yy': <function big_bison at 0x7f75c3bf4bf8>}¶ Mappings are global file extension mappings that are retrieved in the order of definition
-
prec
= {'apply_bundle': {'propagate_uselib_vars', 'apply_link', 'init_pyext'}, 'apply_cs': {'debug_cs', 'use_cs', 'process_source'}, 'apply_intltool_in_f': {'process_source'}, 'apply_java': {'set_classpath', 'jar_files', 'use_javac_files', 'process_source'}, 'apply_link': {'create_task_macapp', 'process_use', 'grep_for_endianness_fun', 'make_test', 'apply_manifest_ifort', 'create_task_macplist', 'apply_implib', 'apply_vnum', 'apply_manifest', 'apply_flags_ifort', 'apply_qt5', 'test_exec_fun', 'apply_flags_msvc', 'set_full_paths_hpux'}, 'apply_ruby_so_name': {'propagate_uselib_vars', 'apply_link'}, 'apply_skip_stlib_link_deps': {'process_use'}, 'apply_tex': {'process_source'}, 'debug_cs': {'doc_cs'}, 'feature_py': {'process_source'}, 'init_perlext': {'propagate_uselib_vars', 'apply_link', 'apply_incpaths'}, 'init_pyembed': {'propagate_uselib_vars'}, 'init_pyext': {'propagate_uselib_vars', 'apply_link'}, 'init_rubyext': {'apply_link', 'apply_bundle', 'apply_incpaths', 'process_source'}, 'jar_files': {'use_jar_files', 'process_source'}, 'link_lib_test_fun': {'process_source'}, 'link_main_routines_tg_method': {'process_source'}, 'process_dbus': {'process_source'}, 'process_enums': {'process_source'}, 'process_install_task': {'process_rule', 'process_source'}, 'process_marshal': {'process_source'}, 'process_mocs': {'process_source'}, 'process_objs': {'process_source'}, 'process_rule': {'create_javadoc', 'process_source'}, 'process_source': {'process_use', 'apply_link', 'apply_incpaths'}, 'process_subst': {'process_rule', 'process_source'}, 'process_use': {'propagate_uselib_vars', 'make_test', 'make_winphone_app', 'apply_incpaths', 'make_windows_app', 'set_full_paths_hpux'}, 'propagate_uselib_vars': {'make_winphone_app', 'apply_vnum', 'apply_incpaths', 'set_classpath', 'make_windows_app'}, 'set_bundle': {'apply_link', 'apply_bundle'}, 'set_lib_pat': {'propagate_uselib_vars', 'apply_link'}, 'use_cs': {'debug_cs'}, 'use_javac_files': {'propagate_uselib_vars', 'set_classpath', 'jar_files'}}¶ Dict that holds the precedence execution rules for task generator methods
-
__init__
(*k, **kw)[source]¶ Task generator objects predefine various attributes (source, target) for possible processing by process_rule (make-like rules) or process_source (extensions, misc methods)
Tasks are stored on the attribute ‘tasks’. They are created by calling methods listed in
self.meths
or referenced in the attributefeatures
A topological sort is performed to execute the methods in correct order.The extra key/value elements passed in
kw
are set as attributes
-
meths
= None¶ List of method names to execute (internal)
-
features
= None¶ List of feature names for bringing new methods in
-
tasks
= None¶ Tasks created are added to this list
-
get_cwd
()[source]¶ Current working directory for the task generator, defaults to the build directory. This is still used in a few places but it should disappear at some point as the classes define their own working directory.
Return type: waflib.Node.Node
-
get_name
()[source]¶ If the attribute
name
is not set on the instance, the name is computed from the target name:def build(bld): x = bld(name='foo') x.get_name() # foo y = bld(target='bar') y.get_name() # bar
Return type: string Returns: name of this task generator
-
name
¶ If the attribute
name
is not set on the instance, the name is computed from the target name:def build(bld): x = bld(name='foo') x.get_name() # foo y = bld(target='bar') y.get_name() # bar
Return type: string Returns: name of this task generator
-
to_list
(val)[source]¶ Ensures that a parameter is a list, see
waflib.Utils.to_list()
Parameters: val (string or list of string) – input to return as a list Return type: list
-
post
()[source]¶ Creates tasks for this task generators. The following operations are performed:
- The body of this method is called only once and sets the attribute
posted
- The attribute
features
is used to add more methods inself.meths
- The methods are sorted by the precedence table
self.prec
or :waflib:attr:waflib.TaskGen.task_gen.prec - The methods are then executed in order
- The tasks created are added to
waflib.TaskGen.task_gen.tasks
- The body of this method is called only once and sets the attribute
-
get_hook
(node)[source]¶ Returns the
@extension
method to call for a Node of a particular extension.Parameters: node ( waflib.Tools.Node.Node
) – Input file to processReturns: A method able to process the input node by looking at the extension Return type: function
-
create_task
(name, src=None, tgt=None, **kw)[source]¶ Creates task instances.
Parameters: - name (string) – task class name
- src (list of
waflib.Tools.Node.Node
) – input nodes - tgt (list of
waflib.Tools.Node.Node
) – output nodes
Returns: A task object
Return type:
-
clone
(env)[source]¶ Makes a copy of a task generator. Once the copy is made, it is necessary to ensure that the it does not create the same output files as the original, or the same files may be compiled several times.
Parameters: env ( waflib.ConfigSet.ConfigSet
) – A configuration setReturns: A copy Return type: waflib.TaskGen.task_gen
-
process_dbus
()¶ Processes the dbus files stored in the attribute dbus_lst to create
waflib.Tools.dbus.dbus_binding_tool
instances.
-
process_enums
()¶ Processes the enum files stored in the attribute enum_list to create
waflib.Tools.glib2.glib_mkenums
instances.
-
process_marshal
()¶ Processes the marshal files stored in the attribute marshal_list to create
waflib.Tools.glib2.glib_genmarshal
instances. Adds the c file created to the list of source to process.
-
waflib.TaskGen.
declare_chain
(name='', rule=None, reentrant=None, color='BLUE', ext_in=[], ext_out=[], before=[], after=[], decider=None, scan=None, install_path=None, shell=False)[source]¶ Creates a new mapping and a task class for processing files by extension. See Tools/flex.py for an example.
Parameters: - name (string) – name for the task class
- rule (string or function) – function to execute or string to be compiled in a function
- reentrant (int) – re-inject the output file in the process (done automatically, set to 0 to disable)
- color (string) – color for the task output
- ext_in (list of string) – execute the task only after the files of such extensions are created
- ext_out (list of string) – execute the task only before files of such extensions are processed
- before (list of string) – execute instances of this task before classes of the given names
- after (list of string) – execute instances of this task after classes of the given names
- decider (function) – if present, function that returns a list of output file extensions (overrides ext_out for output files, but not for the build order)
- scan (function) – scanner function for the task
- install_path (string) – installation path for the output nodes
-
waflib.TaskGen.
taskgen_method
(func)¶ Decorator that registers method as a task generator method. The function must accept a task generator as first parameter:
from waflib.TaskGen import taskgen_method @taskgen_method def mymethod(self): pass
Parameters: func (function) – task generator method to add Return type: function
-
waflib.TaskGen.
feature
(*k)¶ Decorator that registers a task generator method that will be executed when the object attribute
feature
contains the corresponding key(s):from waflib.Task import feature @feature('myfeature') def myfunction(self): print('that is my feature!') def build(bld): bld(features='myfeature')
Parameters: k (list of string) – feature names
-
waflib.TaskGen.
before_method
(*k)[source]¶ Decorator that registera task generator method which will be executed before the functions of given name(s):
from waflib.TaskGen import feature, before @feature('myfeature') @before_method('fun2') def fun1(self): print('feature 1!') @feature('myfeature') def fun2(self): print('feature 2!') def build(bld): bld(features='myfeature')
Parameters: k (list of string) – method names
-
waflib.TaskGen.
before
(*k)¶ Decorator that registera task generator method which will be executed before the functions of given name(s):
from waflib.TaskGen import feature, before @feature('myfeature') @before_method('fun2') def fun1(self): print('feature 1!') @feature('myfeature') def fun2(self): print('feature 2!') def build(bld): bld(features='myfeature')
Parameters: k (list of string) – method names
-
waflib.TaskGen.
after_method
(*k)[source]¶ Decorator that registers a task generator method which will be executed after the functions of given name(s):
from waflib.TaskGen import feature, after @feature('myfeature') @after_method('fun2') def fun1(self): print('feature 1!') @feature('myfeature') def fun2(self): print('feature 2!') def build(bld): bld(features='myfeature')
Parameters: k (list of string) – method names
-
waflib.TaskGen.
after
(*k)¶ Decorator that registers a task generator method which will be executed after the functions of given name(s):
from waflib.TaskGen import feature, after @feature('myfeature') @after_method('fun2') def fun1(self): print('feature 1!') @feature('myfeature') def fun2(self): print('feature 2!') def build(bld): bld(features='myfeature')
Parameters: k (list of string) – method names
-
waflib.TaskGen.
extension
(*k)¶ Decorator that registers a task generator method which will be invoked during the processing of source files for the extension given:
from waflib import Task class mytask(Task): run_str = 'cp ${SRC} ${TGT}' @extension('.moo') def create_maa_file(self, node): self.create_task('mytask', node, node.change_ext('.maa')) def build(bld): bld(source='foo.moo')
-
waflib.TaskGen.
to_nodes
(self, lst, path=None)[source]¶ Task generator method
Flatten the input list of string/nodes/lists into a list of nodes.
It is used by
waflib.TaskGen.process_source()
andwaflib.TaskGen.process_rule()
. It is designed for source files, for folders, seewaflib.Tools.ccroot.to_incnodes()
:Parameters: - lst (list of string and nodes) – input list
- path (
waflib.Tools.Node.Node
) – path from which to search the nodes (by default,waflib.TaskGen.task_gen.path
)
Return type: list of
waflib.Tools.Node.Node
-
waflib.TaskGen.
process_source
(self)[source]¶ Task generator method
Processes each element in the attribute
source
by extension.- The source list is converted through
waflib.TaskGen.to_nodes()
to a list ofwaflib.Node.Node
first. - File extensions are mapped to methods having the signature:
def meth(self, node)
bywaflib.TaskGen.extension()
- The method is retrieved through
waflib.TaskGen.task_gen.get_hook()
- When called, the methods may modify self.source to append more source to process
- The mappings can map an extension or a filename (see the code below)
Feature: all - The source list is converted through
-
waflib.TaskGen.
process_rule
(self)[source]¶ Task generator method
Processes the attribute
rule
. When present,waflib.TaskGen.process_source()
is disabled:def build(bld): bld(rule='cp ${SRC} ${TGT}', source='wscript', target='bar.txt')
Main attributes processed:
- rule: command to execute, it can be a tuple of strings for multiple commands
- chmod: permissions for the resulting files (integer value such as Utils.O755)
- shell: set to False to execute the command directly (default is True to use a shell)
- scan: scanner function
- vars: list of variables to trigger rebuilds, such as CFLAGS
- cls_str: string to display when executing the task
- cls_keyword: label to display when executing the task
- cache_rule: by default, try to re-use similar classes, set to False to disable
- source: list of Node or string objects representing the source files required by this task
- target: list of Node or string objects representing the files that this task creates
- cwd: current working directory (Node or string)
- stdout: standard output, set to None to prevent waf from capturing the text
- stderr: standard error, set to None to prevent waf from capturing the text
- timeout: timeout for command execution (Python 3)
- always: whether to always run the command (False by default)
- deep_inputs: whether the task must depend on the input file tasks too (False by default)
Feature: all Before: waflib.TaskGen.process_source()
-
waflib.TaskGen.
sequence_order
(self)[source]¶ Task generator method
Adds a strict sequential constraint between the tasks generated by task generators. It works because task generators are posted in order. It will not post objects which belong to other folders.
Example:
bld(features='javac seq') bld(features='jar seq')
To start a new sequence, set the attribute seq_start, for example:
obj = bld(features='seq') obj.seq_start = True
Note that the method is executed in last position. This is more an example than a widely-used solution.
Feature: seq
-
class
waflib.TaskGen.
subst_pc
(*k, **kw)[source]¶ Bases:
waflib.Task.Task
Creates .pc files from .pc.in. The task is executed whenever an input variable used in the substitution changes.
-
hcode
= b'\tdef run(self):\n\t\t"Substitutes variables in a .in file"\n\n\t\tif getattr(self.generator, \'is_copy\', None):\n\t\t\tfor i, x in enumerate(self.outputs):\n\t\t\t\tx.write(self.inputs[i].read(\'rb\'), \'wb\')\n\t\t\t\tstat = os.stat(self.inputs[i].abspath()) # Preserve mtime of the copy\n\t\t\t\tos.utime(self.outputs[i].abspath(), (stat.st_atime, stat.st_mtime))\n\t\t\tself.force_permissions()\n\t\t\treturn None\n\n\t\tif getattr(self.generator, \'fun\', None):\n\t\t\tret = self.generator.fun(self)\n\t\t\tif not ret:\n\t\t\t\tself.force_permissions()\n\t\t\treturn ret\n\n\t\tcode = self.inputs[0].read(encoding=getattr(self.generator, \'encoding\', \'latin-1\'))\n\t\tif getattr(self.generator, \'subst_fun\', None):\n\t\t\tcode = self.generator.subst_fun(self, code)\n\t\t\tif code is not None:\n\t\t\t\tself.outputs[0].write(code, encoding=getattr(self.generator, \'encoding\', \'latin-1\'))\n\t\t\tself.force_permissions()\n\t\t\treturn None\n\n\t\t# replace all % by %% to prevent errors by % signs\n\t\tcode = code.replace(\'%\', \'%%\')\n\n\t\t# extract the vars foo into lst and replace @foo@ by %(foo)s\n\t\tlst = []\n\t\tdef repl(match):\n\t\t\tg = match.group\n\t\t\tif g(1):\n\t\t\t\tlst.append(g(1))\n\t\t\t\treturn "%%(%s)s" % g(1)\n\t\t\treturn \'\'\n\t\tcode = getattr(self.generator, \'re_m4\', re_m4).sub(repl, code)\n\n\t\ttry:\n\t\t\td = self.generator.dct\n\t\texcept AttributeError:\n\t\t\td = {}\n\t\t\tfor x in lst:\n\t\t\t\ttmp = getattr(self.generator, x, \'\') or self.env[x] or self.env[x.upper()]\n\t\t\t\ttry:\n\t\t\t\t\ttmp = \'\'.join(tmp)\n\t\t\t\texcept TypeError:\n\t\t\t\t\ttmp = str(tmp)\n\t\t\t\td[x] = tmp\n\n\t\tcode = code % d\n\t\tself.outputs[0].write(code, encoding=getattr(self.generator, \'encoding\', \'latin-1\'))\n\t\tself.generator.bld.raw_deps[self.uid()] = lst\n\n\t\t# make sure the signature is updated\n\t\ttry:\n\t\t\tdelattr(self, \'cache_sig\')\n\t\texcept AttributeError:\n\t\t\tpass\n\n\t\tself.force_permissions()\n'¶
-
-
waflib.TaskGen.
add_pcfile
(self, node)[source]¶ Processes .pc.in files to .pc. Installs the results to
${PREFIX}/lib/pkgconfig/
by default- def build(bld):
- bld(source=’foo.pc.in’, install_path=’${LIBDIR}/pkgconfig/’)
-
class
waflib.TaskGen.
subst
(*k, **kw)[source]¶ Bases:
waflib.TaskGen.subst_pc
-
hcode
= b'\tdef run(self):\n\t\t"Substitutes variables in a .in file"\n\n\t\tif getattr(self.generator, \'is_copy\', None):\n\t\t\tfor i, x in enumerate(self.outputs):\n\t\t\t\tx.write(self.inputs[i].read(\'rb\'), \'wb\')\n\t\t\t\tstat = os.stat(self.inputs[i].abspath()) # Preserve mtime of the copy\n\t\t\t\tos.utime(self.outputs[i].abspath(), (stat.st_atime, stat.st_mtime))\n\t\t\tself.force_permissions()\n\t\t\treturn None\n\n\t\tif getattr(self.generator, \'fun\', None):\n\t\t\tret = self.generator.fun(self)\n\t\t\tif not ret:\n\t\t\t\tself.force_permissions()\n\t\t\treturn ret\n\n\t\tcode = self.inputs[0].read(encoding=getattr(self.generator, \'encoding\', \'latin-1\'))\n\t\tif getattr(self.generator, \'subst_fun\', None):\n\t\t\tcode = self.generator.subst_fun(self, code)\n\t\t\tif code is not None:\n\t\t\t\tself.outputs[0].write(code, encoding=getattr(self.generator, \'encoding\', \'latin-1\'))\n\t\t\tself.force_permissions()\n\t\t\treturn None\n\n\t\t# replace all % by %% to prevent errors by % signs\n\t\tcode = code.replace(\'%\', \'%%\')\n\n\t\t# extract the vars foo into lst and replace @foo@ by %(foo)s\n\t\tlst = []\n\t\tdef repl(match):\n\t\t\tg = match.group\n\t\t\tif g(1):\n\t\t\t\tlst.append(g(1))\n\t\t\t\treturn "%%(%s)s" % g(1)\n\t\t\treturn \'\'\n\t\tcode = getattr(self.generator, \'re_m4\', re_m4).sub(repl, code)\n\n\t\ttry:\n\t\t\td = self.generator.dct\n\t\texcept AttributeError:\n\t\t\td = {}\n\t\t\tfor x in lst:\n\t\t\t\ttmp = getattr(self.generator, x, \'\') or self.env[x] or self.env[x.upper()]\n\t\t\t\ttry:\n\t\t\t\t\ttmp = \'\'.join(tmp)\n\t\t\t\texcept TypeError:\n\t\t\t\t\ttmp = str(tmp)\n\t\t\t\td[x] = tmp\n\n\t\tcode = code % d\n\t\tself.outputs[0].write(code, encoding=getattr(self.generator, \'encoding\', \'latin-1\'))\n\t\tself.generator.bld.raw_deps[self.uid()] = lst\n\n\t\t# make sure the signature is updated\n\t\ttry:\n\t\t\tdelattr(self, \'cache_sig\')\n\t\texcept AttributeError:\n\t\t\tpass\n\n\t\tself.force_permissions()\n'¶
-
-
waflib.TaskGen.
process_subst
(self)[source]¶ Task generator method
Defines a transformation that substitutes the contents of source files to target files:
def build(bld): bld( features='subst', source='foo.c.in', target='foo.c', install_path='${LIBDIR}/pkgconfig', VAR = 'val' )
The input files are supposed to contain macros of the form @VAR@, where VAR is an argument of the task generator object.
This method overrides the processing by
waflib.TaskGen.process_source()
.Feature: subst Before: waflib.TaskGen.process_source()
,waflib.TaskGen.process_rule()