Current File : //proc/self/root/opt/alt/python27/lib/python2.7/site-packages/alembic/script/base.pyo
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� Z d Z e j d � Z d e f d � � YZ d e j f d � � YZ d S( i����Ni ( t util( t compati ( t revision( t migration( t contextmanagers (?!__init__)(.*\.py)(c|o)?$s (?!__init__)(.*\.py)$s ([a-f0-9]+)\.py$s (upgrade|downgrade)_([a-z0-9]+)s \w+s %(rev)s_%(slug)ss ,|(?: +)t ScriptDirectoryc B sF e Z d Z e d d e d d � Z e d � � Z e j
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� Z d � Z d � Z d � Z d � Z d � Z d � Z d � Z d � Z d � Z d � Z e d � � Z d � Z d � Z d � Z! d e e d d d d � Z" d � Z# RS( sH Provides operations upon an Alembic script directory.
This object is useful to get information as to current revisions,
most notably being able to get at the "head" revision, for schemes
that want to test if the current revision in the database is the most
recent::
from alembic.script import ScriptDirectory
from alembic.config import Config
config = Config()
config.set_main_option("script_location", "myapp:migrations")
script = ScriptDirectory.from_config(config)
head_revision = script.get_current_head()
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j d | � � n d S( Ni( sV Path doesn't exist: %r. Please use the 'init' command to create a new scripts folder.( t dirt
file_templatet version_locationst truncate_slug_lengtht
sourcelesst output_encodingR t RevisionMapt _load_revisionst revision_mapt ost accesst F_OKR t CommandError( t selfR R R R R
R ( ( sD /opt/alt/python27/lib/python2.7/site-packages/alembic/script/base.pyt __init__* s c C s9 | j } t | � d k r- t j d � � n | d Sd S( Ni s" Multiple version_locations presenti ( t _version_locationst lenR R ( R t loc( ( sD /opt/alt/python27/lib/python2.7/site-packages/alembic/script/base.pyt versions; s c C sa | j r8 g | j D]! } t j j t j | � � ^ q St j j t j j | j d � � f Sd S( NR ( R R t patht abspathR t coerce_resource_to_filenamet joinR ( R t location( ( sD /opt/alt/python27/lib/python2.7/site-packages/alembic/script/base.pyR C s ,c c s� | j r: g | j D] } t j j | � r | ^ q } n | j g } xT | D]L } xC t j | � D]2 } t j | | | � } | d k r� qc n | Vqc WqM Wd S( N(
R R R R t existsR t listdirt Scriptt _from_filenamet None( R t verst pathst file_t script( ( sD /opt/alt/python27/lib/python2.7/site-packages/alembic/script/base.pyR
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instance.
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present.
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rn} t j t j | j d � � n Xd S( Nsg Requested range %(start)s:%(end)s does not refer to ancestor/descendant revisions along the same brancht startt ends� Multiple head revisions are present for given argument '%(head_arg)s'; please specify a specific target revision, '<branchname>@%(head_arg)s' to narrow to a specific head, or 'heads' for all headst head_argt headss( Can't locate revision identified by '%s'i ( R t RangeNotAncestorErrorR" t lowert upperR t raise_from_causeR R t
MultipleHeadst argumentt format_as_commaR4 t ResolutionErrort
RevisionErrort args(
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resolutiont rnat mht ret err( ( sD /opt/alt/python27/lib/python2.7/site-packages/alembic/script/base.pyt _catch_revision_errors{ s2
t baseR4 c c sT | j d | d | � �6 x. | j j | | d t d t �D] } | Vq; WWd QXd S( s� Iterate through all revisions.
:param base: the base revision, or "base" to start from the
empty revision.
:param head: the head revision; defaults to "heads" to indicate
all head revisions. May also be "head" to indicate a single
head revision.
.. versionchanged:: 0.7.0 the "head" identifier now refers to
the head of a non-branched repository only; use "heads" to
refer to the set of all head branches simultaneously.
R1 R2 t inclusivet assert_relative_lengthN( RF R t iterate_revisionst Truet False( R RG t headt rev( ( sD /opt/alt/python27/lib/python2.7/site-packages/alembic/script/base.pyt walk_revisions� s c C s' | j � � | j j | � SWd QXd S( s� Return the :class:`.Script` instance with the given rev identifier,
symbolic name, or sequence of identifiers.
.. versionadded:: 0.7.0
N( RF R t
get_revisions( R t id_( ( sD /opt/alt/python27/lib/python2.7/site-packages/alembic/script/base.pyRP � s
c C s' | j � � | j j | � SWd QXd S( s� Return the :class:`.Script` instance with the given rev id.
.. seealso::
:meth:`.ScriptDirectory.get_revisions`
N( RF R t get_revision( R RQ ( ( sD /opt/alt/python27/lib/python2.7/site-packages/alembic/script/base.pyRR � s
c C sA | j � � | j j | � \ } } Wd QX| s5 d S| d Sd S( s[ Convert a symbolic revision, i.e. 'head' or 'base', into
an actual revision number.Ni ( RF R t _resolve_revision_numberR" ( R RQ RN t branch_name( ( sD /opt/alt/python27/lib/python2.7/site-packages/alembic/script/base.pyt as_revision_number� s
c C s | j j | | � S( s� Iterate through script revisions, starting at the given
upper revision identifier and ending at the lower.
The traversal uses strictly the `down_revision`
marker inside each migration script, so
it is a requirement that upper >= lower,
else you'll get nothing back.
The iterator yields :class:`.Script` objects.
.. seealso::
:meth:`.RevisionMap.iterate_revisions`
( R RJ ( R R7 R6 ( ( sD /opt/alt/python27/lib/python2.7/site-packages/alembic/script/base.pyRJ � s c C s* | j d d � � | j j � SWd QXd S( sG Return the current head revision.
If the script directory has multiple heads
due to branching, an error is raised;
:meth:`.ScriptDirectory.get_heads` should be
preferred.
:return: a string revision number.
.. seealso::
:meth:`.ScriptDirectory.get_heads`
R@ s} The script directory has multiple heads (due to branching).Please use get_heads(), or merge the branches using alembic merge.N( RF R t get_current_head( R ( ( sD /opt/alt/python27/lib/python2.7/site-packages/alembic/script/base.pyRV � s
c C s t | j j � S( sU Return all "versioned head" revisions as strings.
This is normally a list of length one,
unless branches are present. The
:meth:`.ScriptDirectory.get_current_head()` method
can be used normally when a script directory
has only one head.
:return: a tuple of string revision numbers.
( t listR R4 ( R ( ( sD /opt/alt/python27/lib/python2.7/site-packages/alembic/script/base.pyt get_heads s c C sF | j � } t | � d k r0 t j d � � n | r> | d Sd Sd S( s# Return the "base" revision as a string.
This is the revision number of the script that
has a ``down_revision`` of None.
If the script directory has multiple bases, an error is raised;
:meth:`.ScriptDirectory.get_bases` should be
preferred.
i s@ The script directory has multiple bases. Please use get_bases().i N( t get_basesR R R R" ( R t bases( ( sD /opt/alt/python27/lib/python2.7/site-packages/alembic/script/base.pyt get_base s c C s t | j j � S( s� return all "base" revisions as strings.
This is the revision number of all scripts that
have a ``down_revision`` of None.
.. versionadded:: 0.7.0
( RW R RZ ( R ( ( sD /opt/alt/python27/lib/python2.7/site-packages/alembic/script/base.pyRY % s c C s | j d d d | � �a | j j | | d t �} t | � } g t t | � � D] } t j j | j | � ^ qS SWd QXd S( NR? sF Destination %(end)s is not a valid upgrade target from current head(s)R2 t
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c C s t j | j d � d S( s� Run the script environment.
This basically runs the ``env.py`` script present
in the migration environment. It is called exclusively
by the command functions in :mod:`alembic.command`.
s env.pyN( R t load_python_fileR ( R ( ( sD /opt/alt/python27/lib/python2.7/site-packages/alembic/script/base.pyt run_env� s c C s" t j j t j j | j d � � S( Ns env.py( R R R R R ( R ( ( sD /opt/alt/python27/lib/python2.7/site-packages/alembic/script/base.pyt env_py_location� s c K s6 t j d t j j | � t j | | | j | � d S( Ns
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This runs the ``script.py.mako`` template, given
template arguments, and creates a new file.
:param revid: String revision id. Typically this
comes from ``alembic.util.rev_id()``.
:param message: the revision message, the one passed
by the -m argument to the ``revision`` command.
:param head: the head revision to generate against. Defaults
to the current "head" if no branches are present, else raises
an exception.
.. versionadded:: 0.7.0
:param splice: if True, allow the "head" version to not be an
actual head; otherwise, the selected head must be a head
(e.g. endpoint) revision.
:param refresh: deprecated.
RM R@ s{ Multiple heads are present; please specify the head revision on which the new revision should be based, or perform a merge.Ns" Duplicate head revisions specifiedi sA Multiple version locations present, please specify --version-paths7 Path %s is not represented in current version locationsse Revision %s is not a head revision; please specify --splice to create a new branch from this revisions script.py.makot up_revisiont
down_revisionc s s* | ] } | d k r | j n d Vq d S( N( R" R ( t .0t h( ( sD /opt/alt/python27/lib/python2.7/site-packages/alembic/script/base.pys <genexpr> s t
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� � Z RS( s� Represent a single revision file in a ``versions/`` directory.
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i ( RD R, t longdoc( R ( ( sD /opt/alt/python27/lib/python2.7/site-packages/alembic/script/base.pyt docH s c C sN | j j } | rF t | j d � r< | j | j j � } n | j � Sd Sd S( s) Return the docstring given in the script.t _alembic_source_encodingR� N( R� R� t hasattrt decodeR� t strip( R R� ( ( sD /opt/alt/python27/lib/python2.7/site-packages/alembic/script/base.pyR� N s
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