318 lines
13 KiB
Python
318 lines
13 KiB
Python
from __future__ import unicode_literals
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import os
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from collections import OrderedDict
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from django.core.files.storage import FileSystemStorage
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from django.core.management.base import CommandError, BaseCommand
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from django.core.management.color import no_style
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from django.utils.encoding import smart_text
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from django.utils.six.moves import input
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from django.contrib.staticfiles.finders import get_finders
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from django.contrib.staticfiles.storage import staticfiles_storage
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class Command(BaseCommand):
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"""
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Command that allows to copy or symlink static files from different
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locations to the settings.STATIC_ROOT.
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"""
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help = "Collect static files in a single location."
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requires_system_checks = False
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def __init__(self, *args, **kwargs):
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super(Command, self).__init__(*args, **kwargs)
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self.copied_files = []
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self.symlinked_files = []
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self.unmodified_files = []
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self.post_processed_files = []
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self.storage = staticfiles_storage
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self.style = no_style()
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try:
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self.storage.path('')
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except NotImplementedError:
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self.local = False
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else:
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self.local = True
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def add_arguments(self, parser):
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parser.add_argument('--noinput',
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action='store_false', dest='interactive', default=True,
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help="Do NOT prompt the user for input of any kind.")
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parser.add_argument('--no-post-process',
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action='store_false', dest='post_process', default=True,
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help="Do NOT post process collected files.")
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parser.add_argument('-i', '--ignore', action='append', default=[],
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dest='ignore_patterns', metavar='PATTERN',
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help="Ignore files or directories matching this glob-style "
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"pattern. Use multiple times to ignore more.")
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parser.add_argument('-n', '--dry-run',
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action='store_true', dest='dry_run', default=False,
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help="Do everything except modify the filesystem.")
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parser.add_argument('-c', '--clear',
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action='store_true', dest='clear', default=False,
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help="Clear the existing files using the storage "
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"before trying to copy or link the original file.")
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parser.add_argument('-l', '--link',
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action='store_true', dest='link', default=False,
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help="Create a symbolic link to each file instead of copying.")
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parser.add_argument('--no-default-ignore', action='store_false',
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dest='use_default_ignore_patterns', default=True,
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help="Don't ignore the common private glob-style patterns 'CVS', "
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"'.*' and '*~'.")
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def set_options(self, **options):
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"""
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Set instance variables based on an options dict
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"""
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self.interactive = options['interactive']
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self.verbosity = options['verbosity']
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self.symlink = options['link']
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self.clear = options['clear']
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self.dry_run = options['dry_run']
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ignore_patterns = options['ignore_patterns']
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if options['use_default_ignore_patterns']:
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ignore_patterns += ['CVS', '.*', '*~']
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self.ignore_patterns = list(set(ignore_patterns))
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self.post_process = options['post_process']
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def collect(self):
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"""
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Perform the bulk of the work of collectstatic.
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Split off from handle() to facilitate testing.
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"""
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if self.symlink and not self.local:
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raise CommandError("Can't symlink to a remote destination.")
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if self.clear:
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self.clear_dir('')
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if self.symlink:
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handler = self.link_file
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else:
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handler = self.copy_file
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found_files = OrderedDict()
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for finder in get_finders():
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for path, storage in finder.list(self.ignore_patterns):
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# Prefix the relative path if the source storage contains it
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if getattr(storage, 'prefix', None):
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prefixed_path = os.path.join(storage.prefix, path)
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else:
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prefixed_path = path
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if prefixed_path not in found_files:
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found_files[prefixed_path] = (storage, path)
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handler(path, prefixed_path, storage)
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# Here we check if the storage backend has a post_process
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# method and pass it the list of modified files.
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if self.post_process and hasattr(self.storage, 'post_process'):
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processor = self.storage.post_process(found_files,
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dry_run=self.dry_run)
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for original_path, processed_path, processed in processor:
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if isinstance(processed, Exception):
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self.stderr.write("Post-processing '%s' failed!" % original_path)
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# Add a blank line before the traceback, otherwise it's
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# too easy to miss the relevant part of the error message.
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self.stderr.write("")
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raise processed
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if processed:
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self.log("Post-processed '%s' as '%s'" %
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(original_path, processed_path), level=1)
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self.post_processed_files.append(original_path)
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else:
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self.log("Skipped post-processing '%s'" % original_path)
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return {
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'modified': self.copied_files + self.symlinked_files,
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'unmodified': self.unmodified_files,
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'post_processed': self.post_processed_files,
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}
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def handle(self, **options):
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self.set_options(**options)
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message = ['\n']
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if self.dry_run:
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message.append(
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'You have activated the --dry-run option so no files will be modified.\n\n'
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)
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message.append(
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'You have requested to collect static files at the destination\n'
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'location as specified in your settings'
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)
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if self.is_local_storage() and self.storage.location:
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destination_path = self.storage.location
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message.append(':\n\n %s\n\n' % destination_path)
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else:
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destination_path = None
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message.append('.\n\n')
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if self.clear:
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message.append('This will DELETE ALL FILES in this location!\n')
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else:
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message.append('This will overwrite existing files!\n')
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message.append(
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'Are you sure you want to do this?\n\n'
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"Type 'yes' to continue, or 'no' to cancel: "
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)
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if self.interactive and input(''.join(message)) != 'yes':
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raise CommandError("Collecting static files cancelled.")
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collected = self.collect()
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modified_count = len(collected['modified'])
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unmodified_count = len(collected['unmodified'])
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post_processed_count = len(collected['post_processed'])
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if self.verbosity >= 1:
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template = ("\n%(modified_count)s %(identifier)s %(action)s"
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"%(destination)s%(unmodified)s%(post_processed)s.\n")
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summary = template % {
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'modified_count': modified_count,
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'identifier': 'static file' + ('' if modified_count == 1 else 's'),
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'action': 'symlinked' if self.symlink else 'copied',
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'destination': (" to '%s'" % destination_path if destination_path else ''),
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'unmodified': (', %s unmodified' % unmodified_count if collected['unmodified'] else ''),
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'post_processed': (collected['post_processed'] and
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', %s post-processed'
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% post_processed_count or ''),
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}
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self.stdout.write(summary)
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def log(self, msg, level=2):
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"""
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Small log helper
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"""
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if self.verbosity >= level:
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self.stdout.write(msg)
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def is_local_storage(self):
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return isinstance(self.storage, FileSystemStorage)
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def clear_dir(self, path):
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"""
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Deletes the given relative path using the destination storage backend.
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"""
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dirs, files = self.storage.listdir(path)
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for f in files:
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fpath = os.path.join(path, f)
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if self.dry_run:
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self.log("Pretending to delete '%s'" %
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smart_text(fpath), level=1)
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else:
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self.log("Deleting '%s'" % smart_text(fpath), level=1)
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self.storage.delete(fpath)
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for d in dirs:
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self.clear_dir(os.path.join(path, d))
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def delete_file(self, path, prefixed_path, source_storage):
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"""
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Checks if the target file should be deleted if it already exists
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"""
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if self.storage.exists(prefixed_path):
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try:
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# When was the target file modified last time?
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target_last_modified = \
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self.storage.modified_time(prefixed_path)
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except (OSError, NotImplementedError, AttributeError):
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# The storage doesn't support ``modified_time`` or failed
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pass
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else:
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try:
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# When was the source file modified last time?
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source_last_modified = source_storage.modified_time(path)
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except (OSError, NotImplementedError, AttributeError):
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pass
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else:
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# The full path of the target file
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if self.local:
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full_path = self.storage.path(prefixed_path)
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else:
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full_path = None
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# Skip the file if the source file is younger
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# Avoid sub-second precision (see #14665, #19540)
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if (target_last_modified.replace(microsecond=0)
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>= source_last_modified.replace(microsecond=0)):
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if not ((self.symlink and full_path
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and not os.path.islink(full_path)) or
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(not self.symlink and full_path
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and os.path.islink(full_path))):
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if prefixed_path not in self.unmodified_files:
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self.unmodified_files.append(prefixed_path)
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self.log("Skipping '%s' (not modified)" % path)
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return False
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# Then delete the existing file if really needed
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if self.dry_run:
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self.log("Pretending to delete '%s'" % path)
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else:
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self.log("Deleting '%s'" % path)
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self.storage.delete(prefixed_path)
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return True
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def link_file(self, path, prefixed_path, source_storage):
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"""
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Attempt to link ``path``
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"""
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# Skip this file if it was already copied earlier
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if prefixed_path in self.symlinked_files:
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return self.log("Skipping '%s' (already linked earlier)" % path)
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# Delete the target file if needed or break
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if not self.delete_file(path, prefixed_path, source_storage):
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return
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# The full path of the source file
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source_path = source_storage.path(path)
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# Finally link the file
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if self.dry_run:
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self.log("Pretending to link '%s'" % source_path, level=1)
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else:
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self.log("Linking '%s'" % source_path, level=1)
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full_path = self.storage.path(prefixed_path)
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try:
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os.makedirs(os.path.dirname(full_path))
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except OSError:
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pass
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try:
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if os.path.lexists(full_path):
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os.unlink(full_path)
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os.symlink(source_path, full_path)
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except AttributeError:
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import platform
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raise CommandError("Symlinking is not supported by Python %s." %
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platform.python_version())
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except NotImplementedError:
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import platform
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raise CommandError("Symlinking is not supported in this "
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"platform (%s)." % platform.platform())
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except OSError as e:
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raise CommandError(e)
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if prefixed_path not in self.symlinked_files:
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self.symlinked_files.append(prefixed_path)
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def copy_file(self, path, prefixed_path, source_storage):
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"""
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Attempt to copy ``path`` with storage
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"""
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# Skip this file if it was already copied earlier
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if prefixed_path in self.copied_files:
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return self.log("Skipping '%s' (already copied earlier)" % path)
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# Delete the target file if needed or break
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if not self.delete_file(path, prefixed_path, source_storage):
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return
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# The full path of the source file
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source_path = source_storage.path(path)
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# Finally start copying
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if self.dry_run:
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self.log("Pretending to copy '%s'" % source_path, level=1)
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else:
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self.log("Copying '%s'" % source_path, level=1)
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with source_storage.open(path) as source_file:
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self.storage.save(prefixed_path, source_file)
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self.copied_files.append(prefixed_path)
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