Mercurial > hg
view mercurial/minifileset.py @ 39016:39b8277e2115
changegroup: differentiate between fulltext and diff based deltas
Previously, revisiondelta encoded a delta and an optional prefix
containing a delta header. The underlying code could populate
the delta with either a real delta or a fulltext revision.
Following the theme of wanting to defer serialization of revision
data to the changegroup format as long as possible, it seems
prudent for the revision delta instance to capture what type of
data is being represented. This could possibly allow us to
encode revision data differently in the future. But for the
short term, it makes the behavior of a revisiondelta more
explicit.
Differential Revision: https://phab.mercurial-scm.org/D4213
author | Gregory Szorc <gregory.szorc@gmail.com> |
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date | Wed, 08 Aug 2018 16:01:26 -0700 |
parents | e79a69af1593 |
children | 57875cf423c9 |
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# minifileset.py - a simple language to select files # # Copyright 2017 Facebook, Inc. # # This software may be used and distributed according to the terms of the # GNU General Public License version 2 or any later version. from __future__ import absolute_import from .i18n import _ from . import ( error, fileset, filesetlang, pycompat, ) def _sizep(x): # i18n: "size" is a keyword expr = filesetlang.getstring(x, _("size requires an expression")) return fileset.sizematcher(expr) def _compile(tree): if not tree: raise error.ParseError(_("missing argument")) op = tree[0] if op == 'withstatus': return _compile(tree[1]) elif op in {'symbol', 'string', 'kindpat'}: name = filesetlang.getpattern(tree, {'path'}, _('invalid file pattern')) if name.startswith('**'): # file extension test, ex. "**.tar.gz" ext = name[2:] for c in pycompat.bytestr(ext): if c in '*{}[]?/\\': raise error.ParseError(_('reserved character: %s') % c) return lambda n, s: n.endswith(ext) elif name.startswith('path:'): # directory or full path test p = name[5:] # prefix pl = len(p) f = lambda n, s: n.startswith(p) and (len(n) == pl or n[pl:pl + 1] == '/') return f raise error.ParseError(_("unsupported file pattern: %s") % name, hint=_('paths must be prefixed with "path:"')) elif op in {'or', 'patterns'}: funcs = [_compile(x) for x in tree[1:]] return lambda n, s: any(f(n, s) for f in funcs) elif op == 'and': func1 = _compile(tree[1]) func2 = _compile(tree[2]) return lambda n, s: func1(n, s) and func2(n, s) elif op == 'not': return lambda n, s: not _compile(tree[1])(n, s) elif op == 'func': symbols = { 'all': lambda n, s: True, 'none': lambda n, s: False, 'size': lambda n, s: _sizep(tree[2])(s), } name = filesetlang.getsymbol(tree[1]) if name in symbols: return symbols[name] raise error.UnknownIdentifier(name, symbols.keys()) elif op == 'minus': # equivalent to 'x and not y' func1 = _compile(tree[1]) func2 = _compile(tree[2]) return lambda n, s: func1(n, s) and not func2(n, s) elif op == 'list': raise error.ParseError(_("can't use a list in this context"), hint=_('see \'hg help "filesets.x or y"\'')) raise error.ProgrammingError('illegal tree: %r' % (tree,)) def compile(text): """generate a function (path, size) -> bool from filter specification. "text" could contain the operators defined by the fileset language for common logic operations, and parenthesis for grouping. The supported path tests are '**.extname' for file extension test, and '"path:dir/subdir"' for prefix test. The ``size()`` predicate is borrowed from filesets to test file size. The predicates ``all()`` and ``none()`` are also supported. '(**.php & size(">10MB")) | **.zip | (path:bin & !path:bin/README)' for example, will catch all php files whose size is greater than 10 MB, all files whose name ends with ".zip", and all files under "bin" in the repo root except for "bin/README". """ tree = filesetlang.parse(text) tree = filesetlang.analyze(tree) tree = filesetlang.optimize(tree) return _compile(tree)