1 files changed, 76 insertions, 0 deletions
diff --git a/waflib/extras/softlink_libs.py b/waflib/extras/softlink_libs.py
new file mode 100644
index 0000000..50c777f
--- /dev/null
+++ b/waflib/extras/softlink_libs.py
@@ -0,0 +1,76 @@
+#! /usr/bin/env python
+# per rosengren 2011
+
+from waflib.TaskGen import feature, after_method
+from waflib.Task import Task, always_run
+from os.path import basename, isabs
+from os import tmpfile, linesep
+
+def options(opt):
+	grp = opt.add_option_group('Softlink Libraries Options')
+	grp.add_option('--exclude', default='/usr/lib,/lib', help='No symbolic links are created for libs within [%default]')
+
+def configure(cnf):
+	cnf.find_program('ldd')
+	if not cnf.env.SOFTLINK_EXCLUDE:
+		cnf.env.SOFTLINK_EXCLUDE = cnf.options.exclude.split(',')
+
+@feature('softlink_libs')
+@after_method('process_rule')
+def add_finder(self):
+	tgt = self.path.find_or_declare(self.target)
+	self.create_task('sll_finder', tgt=tgt)
+	self.create_task('sll_installer', tgt=tgt)
+	always_run(sll_installer)
+
+class sll_finder(Task):
+	ext_out = 'softlink_libs'
+	def run(self):
+		bld = self.generator.bld
+		linked=[]
+		target_paths = []
+		for g in bld.groups:
+			for tgen in g:
+				# FIXME it might be better to check if there is a link_task (getattr?)
+				target_paths += [tgen.path.get_bld().bldpath()]
+				linked += [t.outputs[0].bldpath()
+					for t in getattr(tgen, 'tasks', [])
+					if t.__class__.__name__ in
+					['cprogram', 'cshlib', 'cxxprogram', 'cxxshlib']]
+		lib_list = []
+		if len(linked):
+			cmd = [self.env.LDD] + linked
+			# FIXME add DYLD_LIBRARY_PATH+PATH for osx+win32
+			ldd_env = {'LD_LIBRARY_PATH': ':'.join(target_paths + self.env.LIBPATH)}
+			# FIXME the with syntax will not work in python 2
+			with tmpfile() as result:
+				self.exec_command(cmd, env=ldd_env, stdout=result)
+				result.seek(0)
+				for line in result.readlines():
+					words = line.split()
+					if len(words) < 3 or words[1] != '=>':
+						continue
+					lib = words[2]
+					if lib == 'not':
+						continue
+					if any([lib.startswith(p) for p in
+							[bld.bldnode.abspath(), '('] +
+							self.env.SOFTLINK_EXCLUDE]):
+						continue
+					if not isabs(lib):
+						continue
+					lib_list.append(lib)
+			lib_list = sorted(set(lib_list))
+		self.outputs[0].write(linesep.join(lib_list + self.env.DYNAMIC_LIBS))
+		return 0
+
+class sll_installer(Task):
+	ext_in = 'softlink_libs'
+	def run(self):
+		tgt = self.outputs[0]
+		self.generator.bld.install_files('${LIBDIR}', tgt, postpone=False)
+		lib_list=tgt.read().split()
+		for lib in lib_list:
+			self.generator.bld.symlink_as('${LIBDIR}/'+basename(lib), lib, postpone=False)
+		return 0
+