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- Committer: Tim Marston
- Date: 2013-12-08 19:28:11 UTC
- Revision ID: tim@ed.am-20131208192811-r20qj7cgmn4duw11
initial commit; basic app startup and initial command-line processing
- files removed:
- lib/stdhome/command
- lib/stdhome/vcs
- lib/stdhome/walker
- files renamed:
- lib/stdhome/command/init.py => lib/stdhome/command_init.py
- lib/stdhome/program.py => lib/stdhome/stdhome.py
- files modified:
- .bzrignore
added
removed
lib/stdhome/deployment.py
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# deployment.py
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#
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# Copyright (C) 2013 to 2014 Tim Marston <tim@edm.am>
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#
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# This file is part of stdhome (hereafter referred to as "this program").
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# See http://ed.am/dev/stdhome for more information.
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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import os, re, shutil, filecmp, json
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import the, util
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from walker.copy_in import CopyInWalker
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from walker.conflict import ConflictWalker
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from walker.copy_out import CopyOutWalker
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class Deployment:
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def __init__( self ):
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if the.repo is None:
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raise RuntimeError( 'logic error: Deployment initialised when '
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'the.repo is unset' )
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self.load_deployment_state()
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self.conflicts_checked = False
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def load_deployment_state( self ):
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"""Load any deployment state. If one is found then a deployment will be
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considered to be ongoing.
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"""
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# list of files that were copied-in (or at least given the opportunity
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# to be) and updated through the vcs update. This means that, while
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# there may have been conflicts during the update (which the user will
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# have to have dealt with in the repo), any conflicts arising with these
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# files in the home directory are no longer important and can be
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# ignored. In short, this is a list of files that can safely be
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# deployed, regardless of the state of the home directory.
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self.imported_files = None
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# list of files that were affected by a recent vcs update (so only these
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# files need to be checked for deployment conflicts or copied-out)
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self.affected_files = None
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# the revno that the repo was as prior to a recent update
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self.initial_revno = None
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# do we have a repo?
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if not os.path.exists( the.repo.full_dir ): return
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# if no file list exists, we're done
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file = os.path.join( the.full_mddir, "deploy.%s" % the.repo.name )
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if not os.path.isfile( file ):
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return
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# read the file list
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if the.verbose >= 1: print "deployment state found; loading"
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f = open( file, 'r' )
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state = json.loads( f.read() )
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# unpack deployment state
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self.imported_files = state['imported_files'];
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self.initial_revno = state['initial_revno'];
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self.affected_files = state['affected_files'];
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def save_deployment_state( self ):
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"""Save the current deployment state (so there will be a deployment ongoing).
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"""
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if the.verbose >= 1: print "saving deployment state"
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# create metadata directory, as necessary
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if not os.path.isdir( the.full_mddir ):
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os.mkdir( the.full_mddir )
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# pack deployment state
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state = {
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'imported_files': self.imported_files,
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'initial_revno': self.initial_revno,
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'affected_files': self.affected_files,
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}
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# create file
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file = os.path.join( the.full_mddir, "deploy.%s" % the.repo.name )
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f = open( file, 'w' )
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f.write( json.dumps( state ) );
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def remove_deployment_state( self ):
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"""Remove the current deployment state (so no deployment will be ongoing).
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"""
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# check it exists
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file = os.path.join( the.full_mddir, "deploy.%s" % the.repo.name )
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if( os.path.isfile( file ) ):
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# delete it
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if the.verbose >= 1: print "removing deployment state"
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os.unlink( file )
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def is_ongoing( self ):
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"""Is there a deployment currently ongoing?
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"""
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return False if self.imported_files is None else True
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def check_ongoing( self, ongoing = True ):
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"""Check that a deployment either is or is not ongoing and raise an error if
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not.
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"""
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if( ongoing ):
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if self.imported_files is None:
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raise self.DeploymentOngoing( False )
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else:
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if self.imported_files is not None:
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raise self.DeploymentOngoing( True )
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def get_initial_revno( self ):
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"""Get the initial revision identifier from the deployment state.
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"""
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return self.initial_revno
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def copy_in( self, initial_revno = None ):
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"""Copy-in changes from the home directory to the repository. When finished,
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the state of deployment is saved, meaning that a deployment is ongoing.
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"""
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# check we don't already have a file list
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self.check_ongoing( False )
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# if the repo doesn't exist, we have an empty file list
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if not os.path.exists( the.repo.full_dir ):
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self.imported_files = list()
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else:
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# copy in
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if the.verbose >= 1: print "importing files..."
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walker = CopyInWalker()
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walker.walk()
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self.imported_files = walker.walk_list
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# obtain initial revno
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self.initial_revno = the.repo.vcs.get_revno()
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# save state
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self.save_deployment_state()
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def get_conflicts( self, affected_files = None ):
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"""Check to see if there are any deployment conflicts. If a list of affected
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files is supplied, then only those files are checked (and they are also
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saved with the deployment state). Otherwise, all files in the
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repository are checked.
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"""
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# check we have a file list
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self.check_ongoing( True )
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# set updated files
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if affected_files is not None:
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self.affected_files = affected_files
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self.save_deployment_state()
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# check for deployment conflicts
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walker = ConflictWalker( self.imported_files, self.affected_files )
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walker.walk()
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self.conflicts_checked = True
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return walker.changed + walker.obstructed
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def copy_out( self ):
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"""Copy-out changed files from the repository to the home directory. If the
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deployment state includes a list of affected files, then only those
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files are copied-out.
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"""
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# check we have a file list
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self.check_ongoing( True )
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# check that deployment conflicts have been checked-for
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if not self.conflicts_checked:
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raise RuntimeError('logic error: deployment conflicts unchecked' )
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# copy out
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if the.verbose >= 1: print "exporting files..."
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walker = CopyOutWalker( self.affected_files )
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walker.walk()
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# clear state
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self.remove_deployment_state()
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class DeploymentOngoing( the.program.FatalError ):
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def __init__( self, ongoing ):
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if( ongoing ):
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self.msg = "there is an ongoing deployment"
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else:
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self.msg = "there is no ongoing deployment"
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class CopyInConflicts( the.program.FatalError ):
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def __init__( self, conflicts ):
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self.conflicts = conflicts
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