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godot/core/core_builders.py

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Running builder (content generator) functions in subprocesses on Windows - Refactored all builder (make_*) functions into separate Python modules along to the build tree - Introduced utility function to wrap all invocations on Windows, but does not change it elsewhere - Introduced stub to use the builders module as a stand alone script and invoke a selected function There is a problem with file handles related to writing generated content (*.gen.h and *.gen.cpp) on Windows, which randomly causes a SHARING VIOLATION error to the compiler resulting in flaky builds. Running all such content generators in a new subprocess instead of directly inside the build script works around the issue. Yes, I tried the multiprocessing module. It did not work due to conflict with SCons on cPickle. Suggested workaround did not fully work either. Using the run_in_subprocess wrapper on osx and x11 platforms as well for consistency. In case of running a cross-compilation on Windows they would still be used, but likely it will not happen in practice. What counts is that the build itself is running on which platform, not the target platform. Some generated files are written directly in an SConstruct or SCsub file, before the parallel build starts. They don't need to be written in a subprocess, apparently, so I left them as is.
2018-03-17 22:23:55 +00:00
"""Functions used to generate source files during build time
All such functions are invoked in a subprocess on Windows to prevent build flakiness.
"""
from platform_methods import subprocess_main
from compat import iteritems, itervalues, open_utf8, escape_string
def make_authors_header(target, source, env):
sections = ["Project Founders", "Lead Developer", "Project Manager", "Developers"]
sections_id = ["AUTHORS_FOUNDERS", "AUTHORS_LEAD_DEVELOPERS", "AUTHORS_PROJECT_MANAGERS", "AUTHORS_DEVELOPERS"]
src = source[0]
dst = target[0]
f = open_utf8(src, "r")
g = open_utf8(dst, "w")
g.write("/* THIS FILE IS GENERATED DO NOT EDIT */\n")
g.write("#ifndef _EDITOR_AUTHORS_H\n")
g.write("#define _EDITOR_AUTHORS_H\n")
reading = False
def close_section():
g.write("\t0\n")
g.write("};\n")
for line in f:
if reading:
if line.startswith(" "):
g.write("\t\"" + escape_string(line.strip()) + "\",\n")
continue
if line.startswith("## "):
if reading:
close_section()
reading = False
for section, section_id in zip(sections, sections_id):
if line.strip().endswith(section):
current_section = escape_string(section_id)
reading = True
g.write("const char *const " + current_section + "[] = {\n")
break
if reading:
close_section()
g.write("#endif\n")
g.close()
f.close()
def make_donors_header(target, source, env):
sections = ["Platinum sponsors", "Gold sponsors", "Mini sponsors",
"Gold donors", "Silver donors", "Bronze donors"]
sections_id = ["DONORS_SPONSOR_PLAT", "DONORS_SPONSOR_GOLD", "DONORS_SPONSOR_MINI",
"DONORS_GOLD", "DONORS_SILVER", "DONORS_BRONZE"]
src = source[0]
dst = target[0]
f = open_utf8(src, "r")
g = open_utf8(dst, "w")
g.write("/* THIS FILE IS GENERATED DO NOT EDIT */\n")
g.write("#ifndef _EDITOR_DONORS_H\n")
g.write("#define _EDITOR_DONORS_H\n")
reading = False
def close_section():
g.write("\t0\n")
g.write("};\n")
for line in f:
if reading >= 0:
if line.startswith(" "):
g.write("\t\"" + escape_string(line.strip()) + "\",\n")
continue
if line.startswith("## "):
if reading:
close_section()
reading = False
for section, section_id in zip(sections, sections_id):
if line.strip().endswith(section):
current_section = escape_string(section_id)
reading = True
g.write("const char *const " + current_section + "[] = {\n")
break
if reading:
close_section()
g.write("#endif\n")
g.close()
f.close()
def make_license_header(target, source, env):
src_copyright = source[0]
src_license = source[1]
dst = target[0]
class LicenseReader:
def __init__(self, license_file):
self._license_file = license_file
self.line_num = 0
self.current = self.next_line()
def next_line(self):
line = self._license_file.readline()
self.line_num += 1
while line.startswith("#"):
line = self._license_file.readline()
self.line_num += 1
self.current = line
return line
def next_tag(self):
if not ':' in self.current:
return ('', [])
tag, line = self.current.split(":", 1)
lines = [line.strip()]
while self.next_line() and self.current.startswith(" "):
lines.append(self.current.strip())
return (tag, lines)
from collections import OrderedDict
projects = OrderedDict()
license_list = []
with open_utf8(src_copyright, "r") as copyright_file:
reader = LicenseReader(copyright_file)
part = {}
while reader.current:
tag, content = reader.next_tag()
if tag in ("Files", "Copyright", "License"):
part[tag] = content[:]
elif tag == "Comment":
# attach part to named project
projects[content[0]] = projects.get(content[0], []) + [part]
if not tag or not reader.current:
# end of a paragraph start a new part
if "License" in part and not "Files" in part:
# no Files tag in this one, so assume standalone license
license_list.append(part["License"])
part = {}
reader.next_line()
data_list = []
for project in itervalues(projects):
for part in project:
part["file_index"] = len(data_list)
data_list += part["Files"]
part["copyright_index"] = len(data_list)
data_list += part["Copyright"]
with open_utf8(dst, "w") as f:
f.write("/* THIS FILE IS GENERATED DO NOT EDIT */\n")
f.write("#ifndef _EDITOR_LICENSE_H\n")
f.write("#define _EDITOR_LICENSE_H\n")
f.write("const char *const GODOT_LICENSE_TEXT =")
with open_utf8(src_license, "r") as license_file:
for line in license_file:
escaped_string = escape_string(line.strip())
f.write("\n\t\t\"" + escaped_string + "\\n\"")
f.write(";\n\n")
f.write("struct ComponentCopyrightPart {\n"
"\tconst char *license;\n"
"\tconst char *const *files;\n"
"\tconst char *const *copyright_statements;\n"
"\tint file_count;\n"
"\tint copyright_count;\n"
"};\n\n")
f.write("struct ComponentCopyright {\n"
"\tconst char *name;\n"
"\tconst ComponentCopyrightPart *parts;\n"
"\tint part_count;\n"
"};\n\n")
f.write("const char *const COPYRIGHT_INFO_DATA[] = {\n")
for line in data_list:
f.write("\t\"" + escape_string(line) + "\",\n")
f.write("};\n\n")
f.write("const ComponentCopyrightPart COPYRIGHT_PROJECT_PARTS[] = {\n")
part_index = 0
part_indexes = {}
for project_name, project in iteritems(projects):
part_indexes[project_name] = part_index
for part in project:
f.write("\t{ \"" + escape_string(part["License"][0]) + "\", "
+ "&COPYRIGHT_INFO_DATA[" + str(part["file_index"]) + "], "
+ "&COPYRIGHT_INFO_DATA[" + str(part["copyright_index"]) + "], "
+ str(len(part["Files"])) + ", "
+ str(len(part["Copyright"])) + " },\n")
part_index += 1
f.write("};\n\n")
f.write("const int COPYRIGHT_INFO_COUNT = " + str(len(projects)) + ";\n")
f.write("const ComponentCopyright COPYRIGHT_INFO[] = {\n")
for project_name, project in iteritems(projects):
f.write("\t{ \"" + escape_string(project_name) + "\", "
+ "&COPYRIGHT_PROJECT_PARTS[" + str(part_indexes[project_name]) + "], "
+ str(len(project)) + " },\n")
f.write("};\n\n")
f.write("const int LICENSE_COUNT = " + str(len(license_list)) + ";\n")
f.write("const char *const LICENSE_NAMES[] = {\n")
for l in license_list:
f.write("\t\"" + escape_string(l[0]) + "\",\n")
f.write("};\n\n")
f.write("const char *const LICENSE_BODIES[] = {\n\n")
for l in license_list:
for line in l[1:]:
if line == ".":
f.write("\t\"\\n\"\n")
else:
f.write("\t\"" + escape_string(line) + "\\n\"\n")
f.write("\t\"\",\n\n")
f.write("};\n\n")
f.write("#endif\n")
if __name__ == '__main__':
subprocess_main(globals())