Mercurial > hgsubversion
view hgsubversion/compathacks.py @ 1549:8410a978c650
compathacks: be compatible with upstream 8a0cac20a1ad memfilectx change
See hg change 8a0cac20a1ad. Since the interface has changed
more than one time, switch to explicit keywords arguments to avoid
surprises.
Since hgsubversion targets hg >= 3.2.4, drop support for hg 3.0 and 3.1
here.
author | Jun Wu <quark@fb.com> |
---|---|
date | Tue, 19 Dec 2017 14:29:55 -0800 |
parents | c5b7fb8911c0 |
children | 51e105c7f0c6 |
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"""Functions to work around API changes.""" import errno import sys from mercurial import util def branchset(repo): """Return the set of branches present in a repo. Works around branchtags() vanishing between 2.8 and 2.9. """ try: return set(repo.branchmap()) except AttributeError: return set(repo.branchtags()) def pickle_load(f): import cPickle as pickle f.seek(0) return pickle.load(f) def makememfilectx(repo, memctx, path, data, islink, isexec, copied): """Return a memfilectx Works around API change by 8a0cac20a1ad (first in 4.5). """ from mercurial import context try: return context.memfilectx(repo=repo, path=path, data=data, islink=islink, isexec=isexec, copied=copied, changectx=memctx) except TypeError: return context.memfilectx(repo=repo, path=path, data=data, islink=islink, isexec=isexec, copied=copied) def filectxfn_deleted(memctx, path): """ Return None or raise an IOError as necessary if path is deleted. Call as: if path_missing: return compathacks.filectxfn_deleted(memctx, path) Works around filectxfn's contract changing between 3.1 and 3.2: 3.2 onwards, for deleted files, filectxfn should return None rather than returning IOError. """ if getattr(memctx, '_returnnoneformissingfiles', False): return None raise IOError(errno.ENOENT, '%s is deleted' % path) def filectxfn_deleted_reraise(memctx): """ Return None or reraise exc as necessary. Call as: try: # code that raises IOError if the path is missing except IOError: return compathacks.filectxfn_deleted_reraise(memctx) Works around filectxfn's contract changing between 3.1 and 3.2: 3.2 onwards, for deleted files, filectxfn should return None rather than returning IOError. """ exc_info = sys.exc_info() if (exc_info[1].errno == errno.ENOENT and getattr(memctx, '_returnnoneformissingfiles', False)): return None # preserve traceback info raise exc_info[0], exc_info[1], exc_info[2] # copied from hg 3.8 class _funcregistrarbase(object): """Base of decorator to register a fuction for specific purpose This decorator stores decorated functions into own dict 'table'. The least derived class can be defined by overriding 'formatdoc', for example:: class keyword(_funcregistrarbase): _docformat = ":%s: %s" This should be used as below: keyword = registrar.keyword() @keyword('bar') def barfunc(*args, **kwargs): '''Explanation of bar keyword .... ''' pass In this case: - 'barfunc' is stored as 'bar' in '_table' of an instance 'keyword' above - 'barfunc.__doc__' becomes ":bar: Explanation of bar keyword" """ def __init__(self, table=None): if table is None: self._table = {} else: self._table = table def __call__(self, decl, *args, **kwargs): return lambda func: self._doregister(func, decl, *args, **kwargs) def _doregister(self, func, decl, *args, **kwargs): name = self._getname(decl) if func.__doc__ and not util.safehasattr(func, '_origdoc'): doc = func.__doc__.strip() func._origdoc = doc func.__doc__ = self._formatdoc(decl, doc) self._table[name] = func self._extrasetup(name, func, *args, **kwargs) return func def _parsefuncdecl(self, decl): """Parse function declaration and return the name of function in it """ i = decl.find('(') if i >= 0: return decl[:i] else: return decl def _getname(self, decl): """Return the name of the registered function from decl Derived class should override this, if it allows more descriptive 'decl' string than just a name. """ return decl _docformat = None def _formatdoc(self, decl, doc): """Return formatted document of the registered function for help 'doc' is '__doc__.strip()' of the registered function. """ return self._docformat % (decl, doc) def _extrasetup(self, name, func): """Execute exra setup for registered function, if needed """ pass