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amalgamate_utils.py
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amalgamate_utils.py
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import re
import os
class cmtfile:
"""commented file"""
def __init__(self, filename):
self.filename = filename
def __str__(self):
return self.filename
class cmttext:
"""commented text"""
def __init__(self, text):
self.text = text
def __str__(self):
return self.text
class ignfile:
"""ignore file"""
def __init__(self, filename):
self.filename = filename
def __str__(self):
return self.filename
class hdrfile:
"""header file, with custom include guard"""
def __init__(self, filename, incpattern, include_guard=None):
self.filename = filename
self.incpattern = incpattern
self.include_guard = include_guard
def __str__(self):
return self.filename
class injfile:
"""header file, to be injected at the first include point"""
def __init__(self, filename, incpattern):
self.filename = filename
self.incpattern = incpattern
def __str__(self):
return self.filename
class injcode:
"""direct code to inject"""
def __init__(self, code):
self.code = code
def __str__(self):
return self.code
class onlyif:
def __init__(self, condition, obj):
self.condition = condition
self.obj = obj
def catfiles(filenames, rootdir,
include_regexes,
definition_macro,
repo,
result_incguard):
file_re = re.compile('[-./]')
sepb = "//" + ("**" * 40)
sepf = "//" + ("--" * 40)
to_inject = {}
custom_include_guards = {}
def banner(s):
return f"\n\n\n{sepb}\n{sepf}\n// {s}\n// {repo}/{s}\n{sepf}\n{sepb}\n\n"
def footer(s):
return f"\n\n// (end {repo}/{s})\n"
def incguard(filename):
return custom_include_guards.get(filename,
f"{file_re.sub('_', filename).upper()}_")
def replace_include(rx, match, line, guard):
line = line.rstrip()
incl = match.group(1)
if to_inject.get(incl) is None:
if guard is None:
guard = incguard(incl)
return f"""// amalgamate: removed include of
// {repo}/src/{incl}
//{line}
#if !defined({guard}) && !defined(_{guard})
#error "amalgamate: file {incl} must have been included at this point"
#endif /* {guard} */\n
"""
else:
entry = to_inject[incl]
del to_inject[incl]
return append_file(entry.filename)
def append_file(filename, guard=None):
s = ""
with open(filename, encoding="utf8") as f:
for line in f.readlines():
for rx in include_regexes:
match = rx.match(line)
if match:
line = replace_include(rx, match, line, guard)
s += line
return s
def append_cpp(filename):
return f"""#ifdef {definition_macro}
{append_file(filename)}
#endif /* {definition_macro} */
"""
def is_src(filename):
return filename.endswith(".cpp") or filename.endswith(".c")
def cmtline(line, more=""):
if len(line.strip()) > 0:
return f"// {line}{more}"
else:
return "//\n"
out = ""
for entry in filenames:
if isinstance(entry, onlyif):
if entry.condition:
entry = entry.obj
else:
continue
if isinstance(entry, ignfile):
pass
elif isinstance(entry, cmttext):
for line in entry.text.split("\n"):
out += cmtline(line, "\n")
elif isinstance(entry, cmtfile):
filename = f"{rootdir}/{entry.filename}"
out += banner(entry.filename)
with open(filename, encoding="utf8") as file:
for line in file.readlines():
out += cmtline(line)
elif isinstance(entry, injcode):
out += f"\n{entry.code}\n"
elif isinstance(entry, injfile):
entry.filename = f"{rootdir}/{entry.filename}"
to_inject[entry.incpattern] = entry
else:
filename = f"{rootdir}/{entry}"
out += banner(entry)
if isinstance(entry, hdrfile):
if entry.include_guard is not None:
custom_include_guards[entry.incpattern] = entry.include_guard
out += append_file(filename, entry.include_guard)
else:
assert isinstance(entry, str)
if is_src(filename):
out += append_cpp(filename)
else:
out += append_file(filename)
out += footer(entry)
return f"""#ifndef {result_incguard}
#define {result_incguard}
{out}
#endif /* {result_incguard} */
"""
def include_only_first(file_contents: str):
rx = [
re.compile(r'^\s*#\s*include "(.*?)".*'),
re.compile(r'^\s*#\s*include <(.*?)>.*'),
]
already_included = {}
out = ""
for line in file_contents.split("\n"):
for expr in rx:
match = expr.match(line)
if match:
incl = match.group(1)
if already_included.get(incl) is None:
already_included[incl] = line
if incl.endswith(".h"):
cpp_version = f"c{incl[:-2]}"
already_included[cpp_version] = line
elif incl.startswith("c") and not (incl.endswith(".h") or incl.endswith(".hpp")):
c_version = f"{incl[1:]}.h"
already_included[c_version] = line
else:
line = f"//included above:\n//{line}"
break
out += line
out += "\n"
return out
def mkparser(**bool_args):
import argparse
parser = argparse.ArgumentParser()
parser.add_argument("output", default=None, nargs='?', help="output file. defaults to stdout")
for k, (default, help) in bool_args.items():
# https://stackoverflow.com/questions/15008758/parsing-boolean-values-with-argparse
feature = parser.add_mutually_exclusive_group(required=False)
yes = '--' + k
no = '--no-' + k
if default:
yes_default = "this is the default"
no_default = f"the default is {yes}"
else:
yes_default = f"the default is {no}"
no_default = "this is the default"
feature.add_argument(yes, dest=k, action='store_true', help=f"{help}. {yes_default}.")
feature.add_argument(no, dest=k, action='store_false', help=f"{help}. {no_default}.")
parser.set_defaults(**{k: default})
return parser
def file_put_contents(filename: str, contents: str):
if filename is None:
print(contents)
else:
dirname = os.path.dirname(filename)
if dirname:
os.makedirs(dirname, exist_ok=True)
with open(filename, "w", encoding="utf8") as output:
output.write(contents)