mirror of
https://github.com/truenas/scale-build.git
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71557b080f
Always use '/var/empty' when comparing reference files to match TrueNAS SCALE's standard home directory for system users, preventing false cache invalidation due to Debian's '/nonexistent' default.
86 lines
2.7 KiB
Python
86 lines
2.7 KiB
Python
import os
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import shutil
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from scale_build.utils.paths import CACHE_DIR
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from scale_build.utils.reference_files import compare_reference_files
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from scale_build.utils.run import run
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from .hash import get_all_repo_hash
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class CacheMixin:
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@property
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def cache_filename(self):
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raise NotImplementedError
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@property
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def cache_file_path(self):
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return os.path.join(CACHE_DIR, self.cache_filename)
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@property
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def cache_exists(self):
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return all(
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os.path.exists(p) for p in (self.cache_file_path, self.saved_packages_file_path, self.cache_hash_file_path)
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)
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def remove_cache(self):
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for path in filter(
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lambda p: os.path.exists(p),
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(self.cache_file_path, self.saved_packages_file_path, self.cache_hash_file_path)
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):
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os.unlink(path)
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def get_mirror_cache(self):
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if self.cache_exists:
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with open(self.cache_hash_file_path, 'r') as f:
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return f.read().strip()
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def save_build_cache(self, installed_packages):
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self.logger.debug('Caching CHROOT_BASEDIR for future runs...')
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run(['mksquashfs', self.chroot_basedir, self.cache_file_path])
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self.update_saved_packages_list(installed_packages)
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self.update_mirror_cache()
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@property
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def mirror_cache_intact(self):
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intact = True
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if not self.cache_exists:
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# No hash file? Lets remove to be safe
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intact = False
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self.logger.debug('Cache does not exist')
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elif get_all_repo_hash() != self.get_mirror_cache():
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self.logger.debug('Upstream repo changed! Removing squashfs cache to re-create.')
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intact = False
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if intact:
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self.restore_cache(self.chroot_basedir)
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for reference_file, diff in compare_reference_files(
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cut_nonexistent_user_group_membership=True,
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default_homedir='/var/empty'
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):
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if diff:
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intact = False
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self.logger.debug(
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'Reference file %r changed, removing squashfs cache to re-create with it '
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'having following diff:\n%s',
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reference_file, '\n'.join(diff)
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)
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break
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# Remove the temporary restored cached directory
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shutil.rmtree(self.chroot_basedir, ignore_errors=True)
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if not intact:
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self.remove_cache()
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return intact
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@property
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def installed_packages_in_cache_changed(self):
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return self.installed_packages_in_cache != self.get_packages()
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def restore_cache(self, chroot_basedir):
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run(['unsquashfs', '-f', '-d', chroot_basedir, self.cache_file_path])
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