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amalgamate.py
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amalgamate.py
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"""Amalgate json-cpp library sources into a single source and header file.
Works with python2.6+ and python3.4+.
Example of invocation (must be invoked from json-cpp top directory):
python amalgate.py
"""
import os
import os.path
import sys
class AmalgamationFile:
def __init__(self, top_dir):
self.top_dir = top_dir
self.blocks = []
def add_text(self, text):
if not text.endswith("\n"):
text += "\n"
self.blocks.append(text)
def add_file(self, relative_input_path, wrap_in_comment=False):
def add_marker(prefix):
self.add_text("")
self.add_text("// " + "/"*70)
self.add_text("// %s of content of file: %s" % (prefix, relative_input_path.replace("\\","/")))
self.add_text("// " + "/"*70)
self.add_text("")
add_marker("Beginning")
f = open(os.path.join(self.top_dir, relative_input_path), "rt")
content = f.read()
if wrap_in_comment:
content = "/*\n" + content + "\n*/"
self.add_text(content)
f.close()
add_marker("End")
self.add_text("\n\n\n\n")
def get_value(self):
return "".join(self.blocks).replace("\r\n","\n")
def write_to(self, output_path):
output_dir = os.path.dirname(output_path)
if output_dir and not os.path.isdir(output_dir):
os.makedirs(output_dir)
f = open(output_path, "wb")
f.write(str.encode(self.get_value(), 'UTF-8'))
f.close()
def amalgamate_source(source_top_dir=None,
target_source_path=None,
header_include_path=None):
"""Produces amalgated source.
Parameters:
source_top_dir: top-directory
target_source_path: output .cpp path
header_include_path: generated header path relative to target_source_path.
"""
print("Amalgating header...")
header = AmalgamationFile(source_top_dir)
header.add_text("/// Json-cpp amalgated header (http:https://jsoncpp.sourceforge.net/).")
header.add_text('/// It is intended to be used with #include "%s"' % header_include_path)
header.add_file("LICENSE", wrap_in_comment=True)
header.add_text("#ifndef JSON_AMALGATED_H_INCLUDED")
header.add_text("# define JSON_AMALGATED_H_INCLUDED")
header.add_text("/// If defined, indicates that the source file is amalgated")
header.add_text("/// to prevent private header inclusion.")
header.add_text("#define JSON_IS_AMALGAMATION")
header.add_file("include/json/version.h")
header.add_file("include/json/config.h")
header.add_file("include/json/forwards.h")
header.add_file("include/json/features.h")
header.add_file("include/json/value.h")
header.add_file("include/json/reader.h")
header.add_file("include/json/writer.h")
header.add_file("include/json/assertions.h")
header.add_text("#endif //ifndef JSON_AMALGATED_H_INCLUDED")
target_header_path = os.path.join(os.path.dirname(target_source_path), header_include_path)
print("Writing amalgated header to %r" % target_header_path)
header.write_to(target_header_path)
base, ext = os.path.splitext(header_include_path)
forward_header_include_path = base + "-forwards" + ext
print("Amalgating forward header...")
header = AmalgamationFile(source_top_dir)
header.add_text("/// Json-cpp amalgated forward header (http:https://jsoncpp.sourceforge.net/).")
header.add_text('/// It is intended to be used with #include "%s"' % forward_header_include_path)
header.add_text("/// This header provides forward declaration for all JsonCpp types.")
header.add_file("LICENSE", wrap_in_comment=True)
header.add_text("#ifndef JSON_FORWARD_AMALGATED_H_INCLUDED")
header.add_text("# define JSON_FORWARD_AMALGATED_H_INCLUDED")
header.add_text("/// If defined, indicates that the source file is amalgated")
header.add_text("/// to prevent private header inclusion.")
header.add_text("#define JSON_IS_AMALGAMATION")
header.add_file("include/json/config.h")
header.add_file("include/json/forwards.h")
header.add_text("#endif //ifndef JSON_FORWARD_AMALGATED_H_INCLUDED")
target_forward_header_path = os.path.join(os.path.dirname(target_source_path),
forward_header_include_path)
print("Writing amalgated forward header to %r" % target_forward_header_path)
header.write_to(target_forward_header_path)
print("Amalgating source...")
source = AmalgamationFile(source_top_dir)
source.add_text("/// Json-cpp amalgated source (http:https://jsoncpp.sourceforge.net/).")
source.add_text('/// It is intended to be used with #include "%s"' % header_include_path)
source.add_file("LICENSE", wrap_in_comment=True)
source.add_text("")
source.add_text('#include "%s"' % header_include_path)
source.add_text("""
#ifndef JSON_IS_AMALGAMATION
#error "Compile with -I PATH_TO_JSON_DIRECTORY"
#endif
""")
source.add_text("")
lib_json = "src/lib_json"
source.add_file(os.path.join(lib_json, "json_tool.h"))
source.add_file(os.path.join(lib_json, "json_reader.cpp"))
source.add_file(os.path.join(lib_json, "json_valueiterator.inl"))
source.add_file(os.path.join(lib_json, "json_value.cpp"))
source.add_file(os.path.join(lib_json, "json_writer.cpp"))
print("Writing amalgated source to %r" % target_source_path)
source.write_to(target_source_path)
def main():
usage = """%prog [options]
Generate a single amalgated source and header file from the sources.
"""
from optparse import OptionParser
parser = OptionParser(usage=usage)
parser.allow_interspersed_args = False
parser.add_option("-s", "--source", dest="target_source_path", action="store", default="dist/jsoncpp.cpp",
help="""Output .cpp source path. [Default: %default]""")
parser.add_option("-i", "--include", dest="header_include_path", action="store", default="json/json.h",
help="""Header include path. Used to include the header from the amalgated source file. [Default: %default]""")
parser.add_option("-t", "--top-dir", dest="top_dir", action="store", default=os.getcwd(),
help="""Source top-directory. [Default: %default]""")
parser.enable_interspersed_args()
options, args = parser.parse_args()
msg = amalgamate_source(source_top_dir=options.top_dir,
target_source_path=options.target_source_path,
header_include_path=options.header_include_path)
if msg:
sys.stderr.write(msg + "\n")
sys.exit(1)
else:
print("Source succesfully amalagated")
if __name__ == "__main__":
main()