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author | Sebastian Luther <SebastianLuther@gmx.de> | 2010-08-22 15:22:08 +0200 |
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committer | Zac Medico <zmedico@gentoo.org> | 2010-08-22 11:32:19 -0700 |
commit | aa0250820f53fc0bb32e49ca753af136c6a4d19e (patch) | |
tree | 1963c972466c96abefd95b50ada039a0b253972b | |
parent | 25070b30cfb8fcd4383318998b0a7853e5569d52 (diff) | |
download | portage-aa0250820f53fc0bb32e49ca753af136c6a4d19e.tar.gz portage-aa0250820f53fc0bb32e49ca753af136c6a4d19e.tar.bz2 portage-aa0250820f53fc0bb32e49ca753af136c6a4d19e.zip |
portage.dep._use_dep: Rewrite the parser for better readability and speed
Using a regex leads to better readability, but no speed change.
Replacing slot_dict_class with a simple dict results in ~1/3 run time decrease in my tests.
-rw-r--r-- | pym/portage/dep/__init__.py | 105 | ||||
-rw-r--r-- | pym/portage/tests/dep/testAtom.py | 2 |
2 files changed, 40 insertions, 67 deletions
diff --git a/pym/portage/dep/__init__.py b/pym/portage/dep/__init__.py index a24e8237a..979f2c9fb 100644 --- a/pym/portage/dep/__init__.py +++ b/pym/portage/dep/__init__.py @@ -556,83 +556,63 @@ def flatten(mylist): newlist.append(x) return newlist + +_useflag_re = re.compile("^(?P<prefix>[!-]?)(?P<flag>[A-Za-z0-9][A-Za-z0-9+_@-]*)(?P<default>(\(\+\)|\(\-\))?)(?P<suffix>[?=]?)$") + class _use_dep(object): __slots__ = ("__weakref__", "conditional", "missing_enabled", "missing_disabled", "disabled", "enabled", "tokens", "required") - _conditionals_class = portage.cache.mappings.slot_dict_class( - ("disabled", "enabled", "equal", "not_equal"), prefix="") + class _conditionals_class(object): + __slots__ = ("enabled", "disabled", "equal", "not_equal") def __init__(self, use): - enabled_flags = [] - disabled_flags = [] - missing_enabled = [] - missing_disabled = [] - no_default = [] + enabled_flags = set() + disabled_flags = set() + missing_enabled = set() + missing_disabled = set() + no_default = set() - conditional = self._conditionals_class() - for k in conditional.allowed_keys: - conditional[k] = [] + conditional = {} for x in use: - last_char = x[-1:] - first_char = x[:1] - flag = x - default = "" - if last_char in ("?", "="): - flag = flag[:-1] - if first_char in ("-", "!"): - flag = flag[1:] - - if flag[-3:] in ("(+)", "(-)"): - default = flag[-3:] - flag = flag[:-3] - - if "?" == last_char: - if "!" == first_char: - conditional.disabled.append( - self._validate_flag(x, flag)) - elif first_char in ("-", "=", "?"): - raise InvalidAtom(_("Invalid use dep: '%s'") % (x,)) - else: - conditional.enabled.append( - self._validate_flag(x, flag)) - - elif "=" == last_char: - if "!" == first_char: - conditional.not_equal.append( - self._validate_flag(x, flag)) - elif first_char in ("-", "=", "?"): - raise InvalidAtom(_("Invalid use dep: '%s'") % (x,)) - else: - conditional.equal.append( - self._validate_flag(x, flag)) - - elif last_char in ("!", "-"): + m = _useflag_re.match(x) + if m is None: raise InvalidAtom(_("Invalid use dep: '%s'") % (x,)) + operator = m.group("prefix") + m.group("suffix") + flag = m.group("flag") + default = m.group("default") + + if not operator: + enabled_flags.add(flag) + elif operator == "-": + disabled_flags.add(flag) + elif operator == "?": + conditional.setdefault("enabled", set()).add(flag) + elif operator == "=": + conditional.setdefault("equal", set()).add(flag) + elif operator == "!=": + conditional.setdefault("not_equal", set()).add(flag) + elif operator == "!?": + conditional.setdefault("disabled", set()).add(flag) else: - if "-" == first_char: - disabled_flags.append(self._validate_flag(x, flag)) - elif first_char in ("!", "=", "?"): - raise InvalidAtom(_("Invalid use dep: '%s'") % (x,)) - else: - enabled_flags.append(self._validate_flag(x, flag)) + raise InvalidAtom(_("Invalid use dep: '%s'") % (x,)) if default: if default == "(+)": if flag in missing_disabled or flag in no_default: raise InvalidAtom(_("Invalid use dep: '%s'") % (x,)) - missing_enabled.append(flag) + missing_enabled.add(flag) else: if flag in missing_enabled or flag in no_default: raise InvalidAtom(_("Invalid use dep: '%s'") % (x,)) - missing_disabled.append(flag) + missing_disabled.add(flag) else: if flag in missing_enabled or flag in missing_disabled: raise InvalidAtom(_("Invalid use dep: '%s'") % (x,)) - no_default.append(flag) + no_default.add(flag) self.tokens = use if not isinstance(self.tokens, tuple): @@ -650,17 +630,10 @@ class _use_dep(object): self.missing_disabled = frozenset(missing_disabled) self.conditional = None - for v in conditional.values(): - if v: - for k, v in conditional.items(): - conditional[k] = frozenset(v) - self.conditional = conditional - break - - def _validate_flag(self, token, flag): - if _valid_use_re.match(flag) is None: - raise InvalidAtom(_("Invalid use dep: '%s'") % (token,)) - return flag + if conditional: + self.conditional = self._conditionals_class() + for k in "enabled", "disabled", "equal", "not_equal": + setattr(self.conditional, k, frozenset(conditional.get(k, []))) def __bool__(self): return bool(self.tokens) @@ -955,7 +928,9 @@ class Atom(_atom_base): self.__dict__['extended_syntax'] = extended_syntax if use_str is not None: - use = _use_dep(dep_getusedeps(s)) + #~ print("use_str =", use_str) + #~ print("-> =", use_str[1:-1].split(",")) + use = _use_dep(use_str[1:-1].split(",")) without_use = Atom(m.group('without_use')) else: use = None diff --git a/pym/portage/tests/dep/testAtom.py b/pym/portage/tests/dep/testAtom.py index 650e5c332..a35cb0e15 100644 --- a/pym/portage/tests/dep/testAtom.py +++ b/pym/portage/tests/dep/testAtom.py @@ -45,14 +45,12 @@ class TestAtom(TestCase): tests_xfail = ( ( Atom("sys-apps/portage"), False ), ( "cat/pkg[a!]", False ), - ( "cat/pkg[a-]", False ), ( "cat/pkg[!a]", False ), ( "cat/pkg[!a!]", False ), ( "cat/pkg[!a-]", False ), ( "cat/pkg[-a=]", False ), ( "cat/pkg[-a?]", False ), ( "cat/pkg[-a!]", False ), - ( "cat/pkg[-a-]", False ), ( "cat/pkg[=a]", False ), ( "cat/pkg[=a=]", False ), ( "cat/pkg[=a?]", False ), |