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#!/usr/bin/env python3
# If you are thinking "this file looks gross!", it is. It
# started out as a set of Bash one-liners. Which got turned
# into a script. Which grew somewhat organically. Not huge,
# but given that it started as some one liners, that's not a
# very pretty several hunderd lines. Then got fairly litterally
# translated into this, for speed. So yes, it is gross.
# Rewrites welcome; just don't introduce any behavioral changes
# (easy since `tools/notsd-move` runs it on the entire repo and
# puts the results in git history).
import atexit
import filecmp
import json
import os
import re
import shlex
import subprocess
import sys
################################################################
# Everything else in this program is just fluff and bookkeeping
# around around calling classify().
# Return a tuple of (class/group, path); which is a class that
# the header path belongs to, and a normalized path for it.
#
# There are a fixed number of classes that it may put a header
# in; in order of most-public to most-private:
#
# system
# linux
# public
# protected
# private
def classify(expensive, current_file, path):
if path.startswith('linux/'):
return 'linux', path
elif expensive.exists(os.path.join(os.path.dirname(current_file), path)):
return 'private', path
elif not path.startswith('systemd/') and path != 'libudev.h' and expensive.cpp(path):
return 'system', path
else:
if path.endswith('-to-name.h') or path.endswith('-from-name.h'):
base = re.fullmatch('(.*)-(to|from)-name\.h', os.path.basename(path)).group(1)
d={
'dns_type' : 'src/grp-resolve/systemd-resolved',
'keyboard-keys' : 'src/grp-udev/libudev-core',
'af' : 'src/libsystemd-basic/src',
'arphrd' : 'src/libsystemd-basic/src',
'cap' : 'src/libsystemd-basic/src',
'errno' : 'src/libsystemd-basic/src',
'audit_type' : 'src/libsystemd/src/sd-journal',
}
file = os.path.join(d[base], os.path.basename(path))
if current_file.startswith(d[base]):
return 'private', os.path.basename(file)
elif '/include/' in file:
return 'protected', re.sub('.*/include/', '', file)
else:
return 'protected', os.path.basename(file)
elif path in [ 'asm/sgidefs.h', 'dbus/dbus.h', 'efi.h', 'efilib.h', 'gio/gio.h', 'glib.h', 'libmount.h' ]:
return 'system', path
elif os.path.basename(path) == 'util.h':
if '/systemd-boot/' in current_file:
return 'private', 'util.h'
else:
return 'protected', 'systemd-basic/util.h'
else:
find = expensive.find(os.path.basename(path))
if len(find) == 1:
file = find[0]
if '/src/' in file:
if os.path.dirname(current_file) == os.path.dirname(file):
return 'private', os.path.basename(file)
else:
return 'protected', re.sub('.*/src/', '', file)
elif ('/libsystemd/include/' in file) or ('/libudev/include/' in file):
return 'public', re.sub('.*/include/', '', file)
elif '/include/' in file:
return 'protected', re.sub('.*/include/', '', file)
elif '/include-staging/' in file:
return 'protected', re.sub('.*/include-staging/', '', file)
else:
if os.path.dirname(current_file) == os.path.dirname(file):
return 'private', os.path.basename(file)
else:
return 'protected', os.path.basename(file)
else:
sys.exit('Cannot figure out: {0}'.format(path))
################################################################
# Cache expensive things
class Cache:
def __init__(self, filename):
self.cache = {
'find': None,
'cpp': {}
}
self.dirty = True
if os.path.isfile(filename):
with open(filename) as file:
self.cache = json.load(file)
self.dirty = False
def save(self, filename):
if self.dirty:
with open(filename, 'w') as file:
json.dump(self.cache, file)
def real_cpp(path):
# `cpp -include "$path" <<<'' &>/dev/null`
print(' -> cpp({0})'.format(path), file=sys.stderr)
with subprocess.Popen(['cpp', '-include', path],
stdin=subprocess.PIPE,
stdout=subprocess.DEVNULL,
stderr=subprocess.DEVNULL) as proc:
proc.stdin.close()
return proc.wait() == 0
def real_find():
# This can probably be done with os.walk or something,
# but since it is only called once, it isn't a good
# place to start optimizing.
#
# `find src -name '*.h' \( -type l -printf 'l %p\n' -o -type f -printf 'f %p\n' \)`
print(' -> find()', file=sys.stderr)
ret = {}
with subprocess.Popen(['find', 'src', '-name', '*.h', '(', '-type', 'l', '-printf', 'l %p\n', '-o', '-type', 'f', '-printf', 'f %p\n', ')'],
stdin=subprocess.DEVNULL,
stdout=subprocess.PIPE, universal_newlines=True,
stderr=subprocess.DEVNULL) as proc:
for line in proc.stdout:
t, p = line.rstrip('\n').split(' ', 1)
ret[p]=t
return ret
def cpp(self, path):
# `cpp -include "$path" <<<'' &>/dev/null`
if path not in self.cache['cpp']:
self.cache['cpp'][path] = Cache.real_cpp(path)
self.dirty = True
return self.cache['cpp'][path]
def exists(self, path):
# `test -f "$path"`
if not self.cache['find']:
self.cache['find'] = Cache.real_find()
self.dirty = True
return path in self.cache['find']
def find(self, name):
# `find src -type f -name "$name"`
if not self.cache['find']:
self.cache['find'] = Cache.real_find()
self.dirty = True
return [p for p in self.cache['find'].keys() if self.cache['find'][p]=='f' and os.path.basename(p) == name]
################################################################
# Data structure for storing a chunk of `#include` lines.
class IncludeSection:
def __init__(self):
self.trailing_nl = ''
self.system = []
self.linux = []
self.public = []
self.protected = []
self.typedef = []
self.typedef_last = True
self.private = []
def print(self, file=sys.stdout):
b=''
if len(self.system) > 0:
for line in sorted(set(self.system)):
print(line, file=file)
b='\n'
if len(self.linux) > 0:
print(b, end='', file=file)
for line in self.linux:
print(line, file=file)
b='\n'
if len(self.public) > 0:
print(b, end='', file=file)
for line in sorted(set(self.public)):
print(line, file=file)
b='\n'
if len(self.protected) > 0:
print(b, end='', file=file)
for line in sorted(set(self.protected)):
print(line, file=file)
b='\n'
if len(self.typedef) > 0 and not self.typedef_last:
print(b, end='', file=file)
for line in sorted(set(self.typedef)):
print(line, file=file)
b='\n'
if len(self.private) > 0:
print(b, end='', file=file)
for line in sorted(set(self.private)):
print(line, file=file)
b='\n'
if len(self.typedef) > 0 and self.typedef_last:
print(b, end='', file=file)
for line in sorted(set(self.typedef)):
print(line, file=file)
print(self.trailing_nl, end='', file=file)
def add(self, group, path, extra):
if group == 'system':
self.system.append('#include <{0}>{1}'.format(path, extra))
elif group == 'linux':
self.linux.append('#include <{0}>{1}'.format(path, extra))
elif group == 'public':
self.public.append('#include <{0}>{1}'.format(path, extra))
elif group == 'protected':
self.protected.append('#include "{0}"{1}'.format(path, extra))
elif group == 'private':
if len(self.typedef) > 0:
self.typedef_last = False
self.private.append('#include "{0}"{1}'.format(path, extra))
else:
sys.exit('panic: unrecognized line class: {0}'.format(group))
################################################################
# The main program loop
def phase0(cache, filename, line, file=sys.stdout):
global phase
phase = phase0
if re.fullmatch('#include.*|typedef .*;', line):
global includes
includes = IncludeSection()
phase1(cache, filename, line)
else:
print(line, file=file)
def phase1(cache, filename, line, file=sys.stdout):
global phase, includes
phase = phase1
if line == '':
includes.trailing_nl += '\n'
elif line.startswith('#include'):
includes.trailing_nl = ''
match = re.fullmatch('^#include [<"]([^">]*)[">](.*)', line)
if match:
group, path = classify(cache, filename, match.group(1))
includes.add(group, path, match.group(2))
else:
sys.exit('panic: malformed #include line')
elif re.fullmatch('typedef .*;', line):
includes.trailing_nl = ''
includes.typedef.append(line)
else:
includes.print(file=file)
includes = None
phase0(cache, filename, line, file=file)
includes = None
phase = phase0
def main(argv):
cache = Cache(__file__+'.cache')
tmpfilename = ''
def cleanup():
if tmpfilename != '':
try:
os.unlink(tmpfilename)
except FileNotFoundError:
pass
atexit.register(cleanup)
for filename in argv[1:]:
tmpfilename = os.path.join(os.path.dirname(filename), '.tmp.'+os.path.basename(filename)+'.tmp')
print(' => {0} {1}'.format(
shlex.quote(__file__),
shlex.quote(filename),
), file=sys.stderr)
with open(tmpfilename, 'w') as tmpfile:
with open(filename) as f:
for line in f:
phase(cache, filename, line.rstrip('\n'), file=tmpfile)
if includes:
includes.print(file=tmpfile)
if not filecmp.cmp(filename, tmpfilename):
os.rename(tmpfilename, filename)
cleanup()
tmpfilename = ''
cache.save(__file__+'.cache')
if __name__ == '__main__':
main(sys.argv)
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