+
+# From dak/add_user.py
+re_gpg_fingerprint_colon = re.compile(r"^fpr:+(.*):$", re.MULTILINE);
+# The next one is dirty
+re_user_address = re.compile(r"^pub:.*<(.*)@.*>.*$", re.MULTILINE);
+re_user_mails = re.compile(r"^(pub|uid):[^rdin].*<(.*@.*)>.*$", re.MULTILINE);
+re_user_name = re.compile(r"^pub:.*:(.*)<.*$", re.MULTILINE);
+re_re_mark = re.compile(r'^RE:')
+
+re_parse_lintian = re.compile(r"^(?P<level>W|E|O): (?P<package>.*?): (?P<tag>[^ ]*) ?(?P<description>.*)$")
+
+# in generate-releases
+re_gensubrelease = re.compile (r".*/(binary-[0-9a-z-]+|source)$")
+re_includeinrelease = re.compile (r"(Translation-[a-zA-Z_]+\.(?:bz2|xz)|Contents-[0-9a-z-]+.gz|Index|Packages(.gz|.bz2|.xz)?|Sources(.gz|.bz2|.xz)?|Components-[0-9a-z-]+.yml(.gz|.xz)|icons-[0-9x-]+.tar(.gz|.xz)|MD5SUMS|SHA256SUMS|Release)$")
+
+# in generate_index_diffs
+re_includeinpdiff = re.compile(r"(Translation-[a-zA-Z_]+\.(?:bz2|xz))")
+
+
+######################################################################
+# Patterns matching filenames #
+######################################################################
+
+# Match safe filenames
+re_file_safe = re.compile(r'^[a-zA-Z0-9][a-zA-Z0-9_.~+-]*$')
+
+# Match safe filenames, including slashes
+re_file_safe_slash = re.compile(r'^[a-zA-Z0-9][/a-zA-Z0-9_.~+-]*$')
+
+# Prefix of binary and source filenames
+_re_file_prefix = r'^(?P<package>[a-z0-9][a-z0-9.+-]+)_(?P<version>[A-Za-z0-9.~+-]+?)'
+
+# Match binary packages
+# Groups: package, version, architecture, type
+re_file_binary = re.compile(_re_file_prefix + r'_(?P<architecture>[a-z0-9-]+)\.(?P<type>u?deb)$')
+
+# Match changes files
+# Groups: package, version, suffix
+re_file_changes = re.compile(_re_file_prefix + r'_(?P<suffix>[a-zA-Z0-9+-]+)\.changes$')
+
+# Match dsc files
+# Groups: package, version
+re_file_dsc = re.compile(_re_file_prefix + r'\.dsc$')
+
+# Match other source files
+# Groups: package, version
+re_file_source = re.compile(_re_file_prefix + r'\.' + file_source_ext_re)
+
+# Match upstream tarball
+# Groups: package, version
+re_file_orig = re.compile(_re_file_prefix + r'\.' + orig_source_ext_re)
+
+# Match buildinfo file
+# Groups: package, version, suffix
+re_file_buildinfo = re.compile(_re_file_prefix + r'_(?P<suffix>[a-zA-Z0-9+-]+)\.buildinfo$')
+
+######################################################################
+# Patterns matching fields #
+######################################################################
+
+# Match package name
+re_field_package = re.compile(r'^[a-z0-9][a-z0-9.+-]+$')
+
+# Match version
+# Groups: without-epoch
+re_field_version = re.compile(r'^(?:[0-9]+:)?(?P<without_epoch>[A-Za-z0-9.:~+-]+)$')
+
+# Extract upstream version
+# Groups: upstream
+re_field_version_upstream = re.compile(r'^(?:[0-9]+:)?(?P<upstream>.*)-[^-]*$')
+
+# Match source field
+# Groups: package, version
+re_field_source = re.compile(r'^(?P<package>[a-z0-9][a-z0-9.+-]+)(?:\s*\((?P<version>[A-Za-z0-9.:~+-]+)\))?$')