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"""An attempt at an unweave script.
Jack Jansen, jack@oratrix.com, 13-Dec-00
"""
import re
import sys
import macfs
import os
import macostools
BEGINDEFINITION=re.compile("^<<(?P<name>.*)>>=\s*")
USEDEFINITION=re.compile("^(?P<pre>.*)<<(?P<name>.*)>>(?P<post>[^=].*)")
ENDDEFINITION=re.compile("^@")
GREMLINS=re.compile("[\xa0\xca]")
DEFAULT_CONFIG="""
filepatterns = [
("^.*\.cp$", ":unweave-src"),
("^.*\.h$", ":unweave-include"),
]
genlinedirectives = 0
gencomments = 1
"""
class Processor:
def __init__(self, filename, config={}):
self.items = {}
self.filename = filename
self.fp = open(filename)
self.lineno = 0
self.resolving = {}
self.resolved = {}
self.pushback = None
# Options
if config.has_key("genlinedirectives"):
self.genlinedirectives = config["genlinedirectives"]
else:
self.genlinedirectives = 1
if config.has_key("gencomments"):
self.gencomments = config["gencomments"]
else:
self.gencomments = 0
if config.has_key("filepatterns"):
self.filepatterns = config["filepatterns"]
else:
self.filepatterns = []
self.filepattern_relist = []
for pat, dummy in self.filepatterns:
self.filepattern_relist.append(re.compile(pat))
def _readline(self):
"""Read a line. Allow for pushback"""
if self.pushback:
rv = self.pushback
self.pushback = None
return rv
self.lineno = self.lineno + 1
return self.lineno, self.fp.readline()
def _linedirective(self, lineno):
"""Return a #line cpp directive for this file position"""
return '#line %d "%s"\n'%(lineno-3, os.path.split(self.filename)[1])
def _readitem(self):
"""Read the definition of an item. Insert #line where needed. """
rv = []
while 1:
lineno, line = self._readline()
if not line:
break
if ENDDEFINITION.search(line):
break
if BEGINDEFINITION.match(line):
self.pushback = lineno, line
break
mo = USEDEFINITION.match(line)
if mo:
pre = mo.group('pre')
if pre:
## rv.append((lineno, pre+'\n'))
rv.append((lineno, pre))
rv.append((lineno, line))
if mo:
post = mo.group('post')
if post and post != '\n':
rv.append((lineno, post))
return rv
def _define(self, name, value):
"""Define an item, or append to an existing definition"""
if self.items.has_key(name):
self.items[name] = self.items[name] + value
else:
self.items[name] = value
def read(self):
"""Read the source file and store all definitions"""
savedcomment = []
while 1:
lineno, line = self._readline()
if not line: break
mo = BEGINDEFINITION.search(line)
if mo:
name = mo.group('name')
value = self._readitem()
if self.gencomments:
defline = [(lineno, '// <%s>=\n'%name)]
if savedcomment:
savedcomment = savedcomment + [(lineno, '//\n')] + defline
else:
savedcomment = defline
savedcomment = self._processcomment(savedcomment)
value = savedcomment + value
savedcomment = []
isfilepattern = 0
for rexp in self.filepattern_relist:
if rexp.search(name):
isfilepattern = 1
break
if 0 and not isfilepattern:
value = self._addspace(value)
self._define(name, value)
else:
if self.gencomments:
# It seems initial blank lines are ignored:-(
if savedcomment or line.strip():
savedcomment.append((lineno, '// '+line))
def _processcomment(self, comment):
# This routine mimicks some artefact of Matthias' code.
rv = []
for lineno, line in comment:
line = line[:-1]
line = GREMLINS.subn(' ', line)[0]
if len(line) < 75:
line = line + (75-len(line))*' '
line = line + '\n'
rv.append((lineno, line))
return rv
def _addspace(self, value, howmany):
# Yet another routine to mimick yet another artefact
rv = value[0:1]
for lineno, line in value[1:]:
rv.append((lineno, (' '*howmany)+line))
return rv
def resolve(self):
"""Resolve all references"""
for name in self.items.keys():
self._resolve_one(name)
def _resolve_one(self, name):
"""Resolve references in one definition, recursively"""
# First check for unknown macros and recursive calls
if not self.items.has_key(name):
print "Undefined macro:", name
return ['<<%s>>'%name]
if self.resolving.has_key(name):
print "Recursive macro:", name
return ['<<%s>>'%name]
# Then check that we haven't handled this one before
if self.resolved.has_key(name):
return self.items[name]
# No rest for the wicked: we have work to do.
self.resolving[name] = 1
result = []
lastlineincomplete = 0
for lineno, line in self.items[name]:
mo = USEDEFINITION.search(line)
if mo:
# We replace the complete line. Is this correct?
macro = mo.group('name')
replacement = self._resolve_one(macro)
if lastlineincomplete:
replacement = self._addspace(replacement, lastlineincomplete)
result = result + replacement
else:
result.append((lineno, line))
if line[-1] == '\n':
lastlineincomplete = 0
else:
lastlineincomplete = len(line)
self.items[name] = result
self.resolved[name] = 1
del self.resolving[name]
return result
def save(self, dir, pattern):
"""Save macros that match pattern to folder dir"""
# Compile the pattern, if needed
if type(pattern) == type(''):
pattern = re.compile(pattern)
# If the directory is relative it is relative to the sourcefile
if not os.path.isabs(dir):
sourcedir = os.path.split(self.filename)[0]
dir = os.path.join(sourcedir, dir)
for name in self.items.keys():
if pattern.search(name):
pathname = os.path.join(dir, name)
data = self._addlinedirectives(self.items[name])
self._dosave(pathname, data)
def _addlinedirectives(self, data):
curlineno = -100
rv = []
for lineno, line in data:
curlineno = curlineno + 1
if self.genlinedirectives and line and line != '\n' and lineno != curlineno:
rv.append(self._linedirective(lineno))
curlineno = lineno
rv.append(line)
return rv
def _dosave(self, pathname, data):
"""Save data to pathname, unless it is identical to what is there"""
if os.path.exists(pathname):
olddata = open(pathname).readlines()
if olddata == data:
return
macostools.mkdirs(os.path.split(pathname)[0])
fp = open(pathname, "w").writelines(data)
def process(file, config):
pr = Processor(file, config)
pr.read()
pr.resolve()
for pattern, folder in config['filepatterns']:
pr.save(folder, pattern)
def readconfig():
"""Read a configuration file, if it doesn't exist create it."""
configname = sys.argv[0] + '.config'
if not os.path.exists(configname):
confstr = DEFAULT_CONFIG
open(configname, "w").write(confstr)
print "Created config file", configname
## print "Please check and adapt (if needed)"
## sys.exit(0)
namespace = {}
execfile(configname, namespace)
return namespace
def main():
config = readconfig()
if len(sys.argv) > 1:
for file in sys.argv[1:]:
if file[-3:] == '.nw':
print "Processing", file
process(file, config)
else:
print "Skipping", file
else:
fss, ok = macfs.PromptGetFile("Select .nw source file", "TEXT")
if not ok:
sys.exit(0)
process(fss.as_pathname(), config)
if __name__ == "__main__":
main()
|
