1 files changed, 113 insertions, 0 deletions
diff --git a/build/generator/swig/external_runtime.py b/build/generator/swig/external_runtime.py
new file mode 100755
index 0000000..bbf58fc
--- /dev/null
+++ b/build/generator/swig/external_runtime.py
@@ -0,0 +1,113 @@
+#!/usr/bin/env python
+#
+#
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+#
+#
+
+#
+# external_runtime.py: Generate external runtime files for SWIG
+#
+
+import sys, os, re, fileinput
+if __name__ == "__main__":
+  parent_dir = os.path.dirname(os.path.abspath(os.path.dirname(sys.argv[0])))
+  sys.path[0:0] = [ parent_dir, os.path.dirname(parent_dir) ]
+import generator.swig
+import generator.util.executable
+_exec = generator.util.executable
+
+class Generator(generator.swig.Generator):
+  """Generate external runtime files for SWIG"""
+
+  def write(self):
+    """Generate external runtimes"""
+    for lang in self.langs:
+      self.write_external_runtime(lang)
+
+  def write_makefile_rules(self, makefile):
+    """Write the makefile rules for generating external runtimes"""
+    makefile.write(
+      'GEN_SWIG_RUNTIME = cd $(top_srcdir) && $(PYTHON)' +
+      ' build/generator/swig/external_runtime.py build.conf $(SWIG)\n\n'
+    )
+    for lang in self.langs:
+      out = self._output_file(lang)
+      makefile.write(
+        'autogen-swig-%s: %s\n' % (self.short[lang], out) +
+        '%s: $(SWIG_CHECKOUT_FILES)\n' % out +
+        '\t$(GEN_SWIG_RUNTIME) %s\n\n' % lang
+      )
+    makefile.write('\n')
+
+  def write_external_runtime(self, lang):
+    """Generate external runtime header files for each SWIG language"""
+
+    # Runtime library names
+    runtime_library = {
+      "python": "pyrun.swg", "perl":"perlrun.swg", "ruby":"rubydef.swg"
+    }
+
+    # Build runtime files
+    out = self._output_file(lang)
+    if self.version() == (1, 3, 24):
+      out_file = open(out, "w")
+      out_file.write(open("%s/swigrun.swg" % self.proxy_dir).read())
+      out_file.write(open("%s/common.swg" % self.proxy_dir).read())
+      out_file.write(
+        open("%s/%s" % (self.proxy_dir, runtime_library[lang])).read())
+      if lang != "ruby":
+        out_file.write(open("%s/runtime.swg" % self.proxy_dir).read())
+      out_file.close()
+    else:
+      _exec.run("%s -%s -external-runtime %s" % (self.swig_path, lang, out))
+
+    # SWIG 1.3.24-27 should include rubyhead.swg in their
+    # external runtime, but they don't.
+    if lang == "ruby" and self.version() < (1, 3, 28):
+      runtime = open(out).read()
+      out_file = open(out, "w")
+      head = open("%s/rubyhead.swg" % self.proxy_dir).read();
+      out_file.write(head)
+      if self.version() >= (1, 3, 26):
+        # SWIG 1.3.26-27 should include rubytracking.swg in their
+        # external runtime, but they don't.
+        tracking = open("%s/rubytracking.swg" % self.proxy_dir).read();
+        out_file.write(tracking)
+      out_file.write(runtime)
+      out_file.close()
+
+    # SWIG 1.3.25 and earlier use the wrong number of arguments in calls to
+    # SWIG_GetModule. We fix this below.
+    if self.version() <= (1, 3, 25):
+      for line in fileinput.input(out, inplace=1):
+        sys.stdout.write(
+          re.sub(r"SWIG_GetModule\(\)", "SWIG_GetModule(NULL)", line)
+        )
+  def _output_file(self, lang):
+    """Return the output filename of the runtime for the given language"""
+    return '%s/swig_%s_external_runtime.swg' % (self.proxy_dir, lang)
+
+
+if __name__ == "__main__":
+  if len(sys.argv) != 4:
+    print("Usage: %s build.conf swig")
+    print("Generates external runtime files for SWIG")
+  else:
+    gen = Generator(sys.argv[1], sys.argv[2])
+    gen.write_external_runtime(sys.argv[3])