commit 2f31c8146ff12aa96a33cce47bf4b5f5eeac8a06 Author: Nick Mathewson nickm@torproject.org Date: Mon May 20 11:52:45 2019 -0400

rectify_include_paths: warn instead of aborting on duplicate headers

We have two sendme.h files at the moment; we should fix that, but not in this branch. --- scripts/maint/add_c_file.py | 251 +++++++++++++++++++++++++++++++++ scripts/maint/rectify_include_paths.py | 13 +- 2 files changed, 262 insertions(+), 2 deletions(-)

diff --git a/scripts/maint/add_c_file.py b/scripts/maint/add_c_file.py new file mode 100755 index 000000000..499415974 --- /dev/null +++ b/scripts/maint/add_c_file.py @@ -0,0 +1,251 @@ +#!/usr/bin/env python3 + +""" + Add a C file with matching header to the Tor codebase. Creates + both files from templates, and adds them to the right include.am file. + + Example usage: + + % add_c_file.py ./src/feature/dirauth/ocelot.c +""" + +import os +import re +import time + +def topdir_file(name): + """Strip opening "src" from a filename""" + if name.startswith("src/"): + name = name[4:] + return name + +def guard_macro(name): + """Return the guard macro that should be used for the header file 'name'. + """ + td = topdir_file(name).replace(".", "_").replace("/", "_").upper() + return "TOR_{}".format(td) + +def makeext(name, new_extension): + """Replace the extension for the file called 'name' with 'new_extension'. + """ + base = os.path.splitext(name)[0] + return base + "." + new_extension + +def instantiate_template(template, output_fname): + """ + Fill in a template with string using the fields that should be used + for 'output_fname'. + """ + names = { + # The relative location of the header file. + 'header_path' : makeext(topdir_file(output_fname), "h"), + # The relative location of the C file file. + 'c_file_path' : makeext(topdir_file(output_fname), "c"), + # The truncated name of the file. + 'short_name' : os.path.basename(output_fname), + # The current year, for the copyright notice + 'this_year' : time.localtime().tm_year, + # An appropriate guard macro, for the header. + 'guard_macro' : guard_macro(output_fname), + } + + return template.format(**names) + +HEADER_TEMPLATE = """\ +/* Copyright (c) 2001 Matej Pfajfar. + * Copyright (c) 2001-2004, Roger Dingledine. + * Copyright (c) 2004-2006, Roger Dingledine, Nick Mathewson. + * Copyright (c) 2007-{this_year}, The Tor Project, Inc. */ +/* See LICENSE for licensing information */ + +/** + * @file {short_name} + * @brief Header for {c_file_path} + **/ + +#ifndef {guard_macro} +#define {guard_macro} + +#endif /* !defined({guard_macro}) */ +""" + +C_FILE_TEMPLATE = """\ +/* Copyright (c) 2001 Matej Pfajfar. + * Copyright (c) 2001-2004, Roger Dingledine. + * Copyright (c) 2004-2006, Roger Dingledine, Nick Mathewson. + * Copyright (c) 2007-{this_year}, The Tor Project, Inc. */ +/* See LICENSE for licensing information */ + +/** + * @file {short_name} + * @brief DOCDOC + **/ + +#include "orconfig.h" +#include "{header_path}" +""" + +class AutomakeChunk: + """ + Represents part of an automake file. If it is decorated with + an ADD_C_FILE comment, it has a "kind" based on what to add to it. + Otherwise, it only has a bunch of lines in it. + """ + pat = re.compile(r'# ADD_C_FILE: INSERT (\S*) HERE', re.I) + + def __init__(self): + self.lines = [] + self.kind = "" + + def addLine(self, line): + """ + Insert a line into this chunk while parsing the automake file. + """ + m = self.pat.match(line) + if m: + if self.lines: + raise ValueError("control line not preceded by a blank line") + self.kind = m.group(1) + + self.lines.append(line) + if line.strip() == "": + return True + + return False + + def insertMember(self, member): + """ + Add a new member to this chunk. Try to insert it in alphabetical + order with matching indentation, but don't freak out too much if the + source isn't consistent. + + Assumes that this chunk is of the form: + FOOBAR = \ + X \ + Y \ + Z + """ + self.prespace = "\t" + self.postspace = "\t\t" + for lineno, line in enumerate(self.lines): + m = re.match(r'(\s+)(\S+)(\s+)\', line) + if not m: + continue + prespace, fname, postspace = m.groups() + if fname > member: + self.insert_before(lineno, member, prespace, postspace) + return + self.insert_at_end(member) + + def insert_before(self, lineno, member, prespace, postspace): + self.lines.insert(lineno, + "{}{}{}\\n".format(prespace, member, postspace)) + + def insert_at_end(self, member, prespace, postspace): + lastline = self.lines[-1] + self.lines[-1] += '{}\\n'.format(postspace) + self.lines.append("{}{}\n".format(prespace, member)) + + def dump(self, f): + """Write all the lines in this chunk to the file 'f'.""" + for line in self.lines: + f.write(line) + if not line.endswith("\n"): + f.write("\n") + +class ParsedAutomake: + """A sort-of-parsed automake file, with identified chunks into which + headers and c files can be inserted. + """ + def __init__(self): + self.chunks = [] + self.by_type = {} + + def addChunk(self, chunk): + """Add a newly parsed AutomakeChunk to this file.""" + self.chunks.append(chunk) + self.by_type[chunk.kind.lower()] = chunk + + def add_file(self, fname, kind): + """Insert a file of kind 'kind' to the appropriate section of this + file. Return True if we added it. + """ + if kind.lower() in self.by_type: + self.by_type[kind.lower()].insertMember(fname) + return True + else: + return False + + def dump(self, f): + """Write this file into a file 'f'.""" + for chunk in self.chunks: + chunk.dump(f) + +def get_include_am_location(fname): + """Find the right include.am file for introducing a new file. Return None + if we can't guess one. + + Note that this function is imperfect because our include.am layout is + not (yet) consistent. + """ + td = topdir_file(fname) + m = re.match(r'^lib/([a-z0-9_]*)/', td) + if m: + return "src/lib/{}/include.am".format(m.group(1)) + + if re.match(r'^(core|feature|app)/', td): + return "src/core/include.am" + + if re.match(r'^test/', td): + return "src/test/include.am" + + return None + +def run(fn): + """ + Create a new C file and H file corresponding to the filename "fn", and + add them to include.am. + """ + + cf = makeext(fn, "c") + hf = makeext(fn, "h") + + if os.path.exists(cf): + print("{} already exists".format(cf)) + return 1 + if os.path.exists(hf): + print("{} already exists".format(hf)) + return 1 + + with open(cf, 'w') as f: + f.write(instantiate_template(C_FILE_TEMPLATE, cf)) + + with open(hf, 'w') as f: + f.write(instantiate_template(HEADER_TEMPLATE, hf)) + + iam = get_include_am_location(cf) + if iam is None or not os.path.exists(iam): + print("Made files successfully but couldn't identify include.am for {}" + .format(cf)) + return 1 + + amfile = ParsedAutomake() + cur_chunk = AutomakeChunk() + with open(iam) as f: + for line in f: + if cur_chunk.addLine(line): + amfile.addChunk(cur_chunk) + cur_chunk = AutomakeChunk() + amfile.addChunk(cur_chunk) + + amfile.add_file(cf, "sources") + amfile.add_file(hf, "headers") + + with open(iam+".tmp", 'w') as f: + amfile.dump(f) + + os.rename(iam+".tmp", iam) + +if __name__ == '__main__': + import sys + sys.exit(run(sys.argv[1])) diff --git a/scripts/maint/rectify_include_paths.py b/scripts/maint/rectify_include_paths.py index d1a2328ca..1140e8cd2 100755 --- a/scripts/maint/rectify_include_paths.py +++ b/scripts/maint/rectify_include_paths.py @@ -3,6 +3,10 @@ import os import os.path import re +import sys + +def warn(msg): + sys.stderr.write("WARNING: %s\n"%msg)

# Find all the include files, map them to their real names.

@@ -11,6 +15,8 @@ def exclude(paths, dirnames): if p in dirnames: dirnames.remove(p)

+DUPLICATE = object() + def get_include_map(): includes = { }

@@ -19,7 +25,10 @@ def get_include_map():

for fname in fnames: if fname.endswith(".h"): - assert fname not in includes + if fname in includes: + warn("Multiple headers named %s"%fname) + includes[fname] = DUPLICATE + continue include = os.path.join(dirpath, fname) assert include.startswith("src/") includes[fname] = include[4:] @@ -37,7 +46,7 @@ def fix_includes(inp, out, mapping): if m: include,hdr,rest = m.groups() basehdr = get_base_header_name(hdr) - if basehdr in mapping: + if basehdr in mapping and mapping[basehdr] is not DUPLICATE: out.write('{}{}{}\n'.format(include,mapping[basehdr],rest)) continue