py3: utility functions to convert keys of kwargs to bytes/unicodes Keys of keyword arguments need to be str(unicodes) on Python 3. We have a lot of function where we pass keyword arguments. Having utility functions to help converting keys to unicodes before passing and convert back them to bytes once passed into the function will be helpful. We now have functions named pycompat.strkwargs(dic) and pycompat.byteskwargs(dic) to help us.

py3: make a bytes version of getopt.getopt() getopt.getopt() deals with unicodes on Python 3 internally and if bytes arguments are passed, then it will return TypeError. So we have now pycompat.getoptb() which takes bytes arguments, convert them to unicode, call getopt.getopt() and then convert the returned value back to bytes and then return those value. All the instances of getopt.getopt() are replaced with pycompat.getoptb().

parsers: use buffer to store revlog index Previously, the revlog index passed to parse_index2 must be a "string", which means we have to read the whole revlog index into memory. This patch makes the code accept a generic Py_buffer, to be more flexible - it could be a "string", or anything that implements the buffer interface, like a mmap-ed region. Note: ideally we want to remove the "data" field. However, it is still used in parse_index2: if (idx->inlined) { cache = Py_BuildValue("iO", 0, idx->data); .... } .... tuple = Py_BuildValue("NN", idx, cache); .... return tuple; Its only users are revlogio.parseindex and revlog.__init__: # revlogio.parseindex index, cache = parsers.parse_index2(data, inline) return index, getattr(index, 'nodemap', None), cache # revlog.__init__ d = self._io.parseindex(indexdata, self._inline) self.index, nodemap, self._chunkcache = d Maybe we could move the logic (testing inline and returnning "data" object) to revlog.py. But that should be a separate patch.

fancyopts: switch from fancyopts.getopt.* to getopt.* In the next patch, we will be creating a bytes version of getopt.getopt() and doing that will leave getopt as unused import in fancyopts. So before removing that there are instances in codebase where instead of importing getopt, we have used fancyopts.getopt. This patch will switch all those cases so that the next patch can remove the import of getopt from fancyopts without breaking things.

py3: use pycompat.fsdecode() to pass to imp.* functions When we try to pass a bytes argument to a function from imp library, it returns TypeError as it deals with unicodes internally. So we can't use bytes with imp.* functions. Hunting through this, I found we were returning bytes path variable to loadpath() on Python 3.5 (yes most of our codebase is dealing with bytes on Python 3 especially the path variables). Passing unicode does not fails the purpose of loding the extensions and a module object is returned.

localrepo: use ProgrammingError This is an example usage of ProgrammingError. Let's start migrating RuntimeError to ProgrammingError. The code only runs when devel.all-warnings or devel.check-locks is set, so it does not affect the end-user experience.