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350 lines
15 KiB
Python
350 lines
15 KiB
Python
import os
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from django.apps import apps
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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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from django.core.files.storage import FileSystemStorage
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from django.core.management.base import BaseCommand, CommandError
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from django.core.management.color import no_style
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from django.utils.functional import cached_property
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class Command(BaseCommand):
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"""
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Copies or symlinks static files from different locations to the
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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().__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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@cached_property
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def local(self):
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try:
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self.storage.path('')
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except NotImplementedError:
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return False
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return True
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def add_arguments(self, parser):
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parser.add_argument(
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'--noinput', '--no-input', action='store_false', dest='interactive',
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help="Do NOT prompt the user for input of any kind.",
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)
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parser.add_argument(
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'--no-post-process', action='store_false', dest='post_process',
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help="Do NOT post process collected files.",
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)
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parser.add_argument(
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'-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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)
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parser.add_argument(
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'-n', '--dry-run', action='store_true',
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help="Do everything except modify the filesystem.",
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)
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parser.add_argument(
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'-c', '--clear', action='store_true',
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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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)
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parser.add_argument(
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'-l', '--link', action='store_true',
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help="Create a symbolic link to each file instead of copying.",
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)
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parser.add_argument(
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'--no-default-ignore', action='store_false', dest='use_default_ignore_patterns',
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help="Don't ignore the common private glob-style patterns (defaults to 'CVS', '.*' and '*~').",
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)
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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 += apps.get_app_config('staticfiles').ignore_patterns
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self.ignore_patterns = list(set(os.path.normpath(p) for p in 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 = {}
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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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else:
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self.log(
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"Found another file with the destination path '%s'. It "
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"will be ignored since only the first encountered file "
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"is collected. If this is not what you want, make sure "
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"every static file has a unique path." % prefixed_path,
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level=1,
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)
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# Storage backends may define a post_process() method.
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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=2)
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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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should_warn_user = (
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self.storage.exists(destination_path) and
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any(self.storage.listdir(destination_path))
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)
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else:
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destination_path = None
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message.append('.\n\n')
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# Destination files existence not checked; play it safe and warn.
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should_warn_user = True
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if self.interactive and should_warn_user:
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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 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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return 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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Delete the given relative path using the destination storage backend.
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"""
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if not self.storage.exists(path):
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return
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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'" % fpath, level=1)
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else:
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self.log("Deleting '%s'" % fpath, level=1)
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try:
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full_path = self.storage.path(fpath)
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except NotImplementedError:
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self.storage.delete(fpath)
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else:
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if not os.path.exists(full_path) and os.path.lexists(full_path):
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# Delete broken symlinks
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os.unlink(full_path)
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else:
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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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Check 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 = self.storage.get_modified_time(prefixed_path)
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except (OSError, NotImplementedError, AttributeError):
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# The storage doesn't support get_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.get_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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# If it's --link mode and the path isn't a link (i.e.
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# the previous collectstatic wasn't with --link) or if
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# it's non-link mode and the path is a link (i.e. the
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# previous collectstatic was with --link), the old
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# links/files must be deleted so it's not safe to skip
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# unmodified files.
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can_skip_unmodified_files = not (self.symlink ^ os.path.islink(full_path))
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else:
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# In remote storages, skipping is only based on the
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# modified times since symlinks aren't relevant.
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can_skip_unmodified_files = True
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# Avoid sub-second precision (see #14665, #19540)
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file_is_unmodified = (
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target_last_modified.replace(microsecond=0) >=
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source_last_modified.replace(microsecond=0)
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)
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if file_is_unmodified and can_skip_unmodified_files:
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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=2)
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full_path = self.storage.path(prefixed_path)
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os.makedirs(os.path.dirname(full_path), exist_ok=True)
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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=2)
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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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