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Fix #284: Implement tilde and caret matching · tomschr/python-semver@b8ae6fa · GitHub
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Fix python-semver#284: Implement tilde and caret matching
* Introduce Spec class to deal with such comparisons * Improve documentation * Simplify code in Version.match (delegates to Spec.match)
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‎docs/api.rst‎

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@@ -83,4 +83,29 @@ Version Handling :mod:`semver.version`
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.. autoclass:: semver.version.Version
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:members:
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:inherited-members:
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:special-members: __iter__, __eq__, __ne__, __lt__, __le__, __gt__, __ge__, __getitem__, __hash__, __repr__, __str__
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Version Regular Expressions :mod:`semver.versionregex`
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------------------------------------------------------
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.. automodule:: semver.versionregex
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.. autoclass:: semver.versionregex.VersionRegex
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:members:
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:private-members:
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Spec Handling :mod:`semver.spec`
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--------------------------------
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.. automodule:: semver.spec
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.. autoclass:: semver.spec.Spec
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:members: match
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:private-members: _caret, _tilde
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:special-members: __eq__, __ne__, __lt__, __le__, __gt__, __ge__, __repr__, __str__
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.. autoclass:: semver.spec.InvalidSpecifier
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‎docs/conf.py‎

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@@ -129,10 +129,12 @@ def find_version(*file_paths):
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# wget -O docs/python-objects.inv https://docs.python.org/3/objects.inv
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"python": ("https://docs.python.org/3", (None, "inventories/python-objects.inv")),
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}
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# Avoid side-effects (namely that documentations local references can
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# suddenly resolve to an external location.)
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intersphinx_disabled_reftypes = ["*"]
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# -- Options for HTML output ----------------------------------------------
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# The theme to use for HTML and HTML Help pages. See the documentation for

‎docs/usage/compare-versions-through-expression.rst‎

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@@ -15,6 +15,8 @@ Currently, the match expression supports the following operators:
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* ``<=`` smaller or equal than
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* ``==`` equal
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* ``!=`` not equal
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* ``~`` for tilde ranges, see :ref:`tilde_expressions`
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* ``^`` for caret ranges, see :ref:`caret_expressions`
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That gives you the following possibilities to express your condition:
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@@ -27,10 +29,10 @@ That gives you the following possibilities to express your condition:
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False
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If no operator is specified, the match expression is interpreted as a
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version to be compared for equality. This allows handling the common
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case of version compatibility checking through either an exact version
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or a match expression very easy to implement, as the same code will
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handle both cases:
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version to be compared for equality with the ``==`` operator.
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This allows handling the common case of version compatibility checking
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through either an exact version or a match expression very easy to
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implement, as the same code will handle both cases:
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.. code-block:: python
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@@ -39,3 +41,94 @@ handle both cases:
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True
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>>> version.match("3.5.1")
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False
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Using the :class:`Spec <semver.spec.Spec>` class
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------------------------------------------------
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The :class:`Spec <semver.spec.Spec>` class is the underlying object
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which makes comparison possible.
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It supports comparisons through usual Python operators:
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.. code-block:: python
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>>> Spec("1.2") > '1.2.1'
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True
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>>> Spec("1.3") == '1.3.10'
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False
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If you need to reuse a ``Spec`` object, use the :meth:`match <semver.spec.Spec.match>` method:
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.. code-block:: python
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>>> spec = Spec(">=1.2.3")
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>>> spec.match("1.3.1")
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True
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>>> spec.match("1.2.1")
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False
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.. _tilde_expressions:
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Using tilde expressions
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-----------------------
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Tilde expressions are "approximately equivalent to a version".
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They are expressions like ``~1``, ``~1.2``, or ``~1.2.3``.
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Tilde expression freezes major and minor numbers. They are used if
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you want to avoid potentially incompatible changes, but want to accept bug fixes.
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Internally they are converted into two comparisons:
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* ``~1`` is converted into ``>=1.0.0 <(1+1).0.0`` which is ``>=1.0.0 <2.0.0``
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* ``~1.2`` is converted into ``>=1.2.0 <1.(2+1).0`` which is ``>=1.2.0 <1.3.0``
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* ``~1.2.3`` is converted into ``>=1.2.3 <1.(2+1).0`` which is ``>=1.2.3 <1.3.0``
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Only if both comparisions are true, the tilde expression as whole is true
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as in the following examples:
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.. code-block:: python
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>>> version = Version(1, 2, 0)
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>>> version.match("~1.2") # same as >=1.2.0 AND <1.3.0
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True
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>>> version.match("~1.3.2") # same as >=1.3.2 AND <1.4.0
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False
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.. _caret_expressions:
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Using caret expressions
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-----------------------
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Care expressions are "compatible with a version".
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They are expressions like ``^1``, ``^1.2``, or ``^1.2.3``.
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Care expressions freezes the major number only.
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Internally they are converted into two comparisons:
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* ``^1`` is converted into ``>=1.0.0 <2.0.0``
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* ``^1.2`` is converted into ``>=1.2.0 <2.0.0``
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* ``^1.2.3`` is converted into ``>=1.2.3 <2.0.0``
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.. code-block:: python
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>>> version = Version(1, 2, 0)
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>>> version.match("^1.2") # same as >=1.2.0 AND <2.0.0
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True
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>>> version.match("^1.3")
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False
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It is possible to add placeholders to the care expression. Placeholders
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are ``x``, ``X``, or ``*`` and are replaced by zeros like in the following examples:
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.. code-block:: python
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>>> version = Version(1, 2, 3)
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>>> version.match("^1.x") # same as >=1.0.0 AND <2.0.0
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True
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>>> version.match("^1.2.x") # same as >=1.2.0 AND <2.0.0
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True
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>>> version.match("^1.3.*") # same as >=1.3.0 AND <2.0.0
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False

‎src/semver/__init__.py‎

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@@ -28,6 +28,7 @@
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main,
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)
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from .version import Version, VersionInfo
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from .spec import Spec
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from .__about__ import (
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__version__,
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__author__,

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