From eede9648d50c3750f6f8d1319a79dd76d7f10b55 Mon Sep 17 00:00:00 2001
From: David Robillard <d@drobilla.net>
Date: Sat, 15 Sep 2018 14:51:02 +0200
Subject: Squashed 'waflib/' content from commit 982416b8

git-subtree-dir: waflib
git-subtree-split: 982416b8a6c6728e200243e1be3ab60435c08830
---
 Tools/c_aliases.py | 144 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 144 insertions(+)
 create mode 100644 Tools/c_aliases.py

(limited to 'Tools/c_aliases.py')

diff --git a/Tools/c_aliases.py b/Tools/c_aliases.py
new file mode 100644
index 00000000..c9d53692
--- /dev/null
+++ b/Tools/c_aliases.py
@@ -0,0 +1,144 @@
+#!/usr/bin/env python
+# encoding: utf-8
+# Thomas Nagy, 2005-2015 (ita)
+
+"base for all c/c++ programs and libraries"
+
+from waflib import Utils, Errors
+from waflib.Configure import conf
+
+def get_extensions(lst):
+	"""
+	Returns the file extensions for the list of files given as input
+
+	:param lst: files to process
+	:list lst: list of string or :py:class:`waflib.Node.Node`
+	:return: list of file extensions
+	:rtype: list of string
+	"""
+	ret = []
+	for x in Utils.to_list(lst):
+		if not isinstance(x, str):
+			x = x.name
+		ret.append(x[x.rfind('.') + 1:])
+	return ret
+
+def sniff_features(**kw):
+	"""
+	Computes and returns the features required for a task generator by
+	looking at the file extensions. This aimed for C/C++ mainly::
+
+		snif_features(source=['foo.c', 'foo.cxx'], type='shlib')
+		# returns  ['cxx', 'c', 'cxxshlib', 'cshlib']
+
+	:param source: source files to process
+	:type source: list of string or :py:class:`waflib.Node.Node`
+	:param type: object type in *program*, *shlib* or *stlib*
+	:type type: string
+	:return: the list of features for a task generator processing the source files
+	:rtype: list of string
+	"""
+	exts = get_extensions(kw['source'])
+	typ = kw['typ']
+	feats = []
+
+	# watch the order, cxx will have the precedence
+	for x in 'cxx cpp c++ cc C'.split():
+		if x in exts:
+			feats.append('cxx')
+			break
+
+	if 'c' in exts or 'vala' in exts or 'gs' in exts:
+		feats.append('c')
+
+	for x in 'f f90 F F90 for FOR'.split():
+		if x in exts:
+			feats.append('fc')
+			break
+
+	if 'd' in exts:
+		feats.append('d')
+
+	if 'java' in exts:
+		feats.append('java')
+		return 'java'
+
+	if typ in ('program', 'shlib', 'stlib'):
+		will_link = False
+		for x in feats:
+			if x in ('cxx', 'd', 'fc', 'c'):
+				feats.append(x + typ)
+				will_link = True
+		if not will_link and not kw.get('features', []):
+			raise Errors.WafError('Cannot link from %r, try passing eg: features="c cprogram"?' % kw)
+	return feats
+
+def set_features(kw, typ):
+	"""
+	Inserts data in the input dict *kw* based on existing data and on the type of target
+	required (typ).
+
+	:param kw: task generator parameters
+	:type kw: dict
+	:param typ: type of target
+	:type typ: string
+	"""
+	kw['typ'] = typ
+	kw['features'] = Utils.to_list(kw.get('features', [])) + Utils.to_list(sniff_features(**kw))
+
+@conf
+def program(bld, *k, **kw):
+	"""
+	Alias for creating programs by looking at the file extensions::
+
+		def build(bld):
+			bld.program(source='foo.c', target='app')
+			# equivalent to:
+			# bld(features='c cprogram', source='foo.c', target='app')
+
+	"""
+	set_features(kw, 'program')
+	return bld(*k, **kw)
+
+@conf
+def shlib(bld, *k, **kw):
+	"""
+	Alias for creating shared libraries by looking at the file extensions::
+
+		def build(bld):
+			bld.shlib(source='foo.c', target='app')
+			# equivalent to:
+			# bld(features='c cshlib', source='foo.c', target='app')
+
+	"""
+	set_features(kw, 'shlib')
+	return bld(*k, **kw)
+
+@conf
+def stlib(bld, *k, **kw):
+	"""
+	Alias for creating static libraries by looking at the file extensions::
+
+		def build(bld):
+			bld.stlib(source='foo.cpp', target='app')
+			# equivalent to:
+			# bld(features='cxx cxxstlib', source='foo.cpp', target='app')
+
+	"""
+	set_features(kw, 'stlib')
+	return bld(*k, **kw)
+
+@conf
+def objects(bld, *k, **kw):
+	"""
+	Alias for creating object files by looking at the file extensions::
+
+		def build(bld):
+			bld.objects(source='foo.c', target='app')
+			# equivalent to:
+			# bld(features='c', source='foo.c', target='app')
+
+	"""
+	set_features(kw, 'objects')
+	return bld(*k, **kw)
+
-- 
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