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module Gitlab
module Regex
extend self
# The namespace regex is used in Javascript to validate usernames in the "Register" form. However, Javascript
# does not support the negative lookbehind assertion (?<!) that disallows usernames ending in `.git` and `.atom`.
# Since this is a non-trivial problem to solve in Javascript (heavily complicate the regex, modify view code to
# allow non-regex validatiions, etc), `NAMESPACE_REGEX_STR_JS` serves as a Javascript-compatible version of
# `NAMESPACE_REGEX_STR`, with the negative lookbehind assertion removed. This means that the client-side validation
# will pass for usernames ending in `.atom` and `.git`, but will be caught by the server-side validation.
PATH_REGEX_STR = '[a-zA-Z0-9_\.][a-zA-Z0-9_\-\.]*'.freeze
NAMESPACE_REGEX_STR_JS = PATH_REGEX_STR + '[a-zA-Z0-9_\-]|[a-zA-Z0-9_]'.freeze
NO_SUFFIX_REGEX_STR = '(?<!\.git|\.atom)'.freeze
NAMESPACE_REGEX_STR = "(?:#{NAMESPACE_REGEX_STR_JS})#{NO_SUFFIX_REGEX_STR}".freeze
PROJECT_REGEX_STR = "(?:#{PATH_REGEX_STR})#{NO_SUFFIX_REGEX_STR}".freeze
# Same as NAMESPACE_REGEX_STR but allows `/` in the path.
# So `group/subgroup` will match this regex but not NAMESPACE_REGEX_STR
FULL_NAMESPACE_REGEX_STR = "(?:#{NAMESPACE_REGEX_STR}/)*#{NAMESPACE_REGEX_STR}".freeze
def namespace_regex
@namespace_regex ||= /\A#{NAMESPACE_REGEX_STR}\z/.freeze
end
def namespace_route_regex
@namespace_route_regex ||= /#{NAMESPACE_REGEX_STR}/.freeze
end
def namespace_regex_message
"can contain only letters, digits, '_', '-' and '.'. " \
"Cannot start with '-' or end in '.', '.git' or '.atom'." \
end
def namespace_name_regex
@namespace_name_regex ||= /\A[\p{Alnum}\p{Pd}_\. ]*\z/.freeze
end
def namespace_name_regex_message
"can contain only letters, digits, '_', '.', dash and space."
end
def project_name_regex
@project_name_regex ||= /\A[\p{Alnum}\u{00A9}-\u{1f9c0}_][\p{Alnum}\p{Pd}\u{00A9}-\u{1f9c0}_\. ]*\z/.freeze
end
def project_name_regex_message
"can contain only letters, digits, emojis, '_', '.', dash, space. " \
"It must start with letter, digit, emoji or '_'."
end
def project_path_regex
@project_path_regex ||= /\A#{PROJECT_REGEX_STR}\z/.freeze
end
def project_route_regex
@project_route_regex ||= /#{PROJECT_REGEX_STR}/.freeze
end
def project_git_route_regex
@project_route_git_regex ||= /#{PATH_REGEX_STR}\.git/.freeze
end
def project_path_regex_message
"can contain only letters, digits, '_', '-' and '.'. " \
"Cannot start with '-', end in '.git' or end in '.atom'" \
end
def file_name_regex
@file_name_regex ||= /\A[[[:alnum:]]_\-\.\@\+]*\z/.freeze
end
def file_name_regex_message
"can contain only letters, digits, '_', '-', '@', '+' and '.'."
end
def file_path_regex
@file_path_regex ||= /\A[[[:alnum:]]_\-\.\/\@]*\z/.freeze
end
def file_path_regex_message
"can contain only letters, digits, '_', '-', '@' and '.'. Separate directories with a '/'."
end
def directory_traversal_regex
@directory_traversal_regex ||= /\.{2}/.freeze
end
def directory_traversal_regex_message
"cannot include directory traversal."
end
def archive_formats_regex
# |zip|tar| tar.gz | tar.bz2 |
@archive_formats_regex ||= /(zip|tar|tar\.gz|tgz|gz|tar\.bz2|tbz|tbz2|tb2|bz2)/.freeze
end
def git_reference_regex
# Valid git ref regex, see:
# https://www.kernel.org/pub/software/scm/git/docs/git-check-ref-format.html
@git_reference_regex ||= %r{
(?!
(?# doesn't begins with)
\/| (?# rule #6)
(?# doesn't contain)
.*(?:
[\/.]\.| (?# rule #1,3)
\/\/| (?# rule #6)
@\{| (?# rule #8)
\\ (?# rule #9)
)
)
[^\000-\040\177~^:?*\[]+ (?# rule #4-5)
(?# doesn't end with)
(?<!\.lock) (?# rule #1)
(?<![\/.]) (?# rule #6-7)
}x.freeze
end
def container_registry_reference_regex
git_reference_regex
end
def environment_name_regex
@environment_name_regex ||= /\A[a-zA-Z0-9_\\\/\${}. -]+\z/.freeze
end
def environment_name_regex_message
"can contain only letters, digits, '-', '_', '/', '$', '{', '}', '.' and spaces"
end
def kubernetes_namespace_regex
/\A[a-z0-9]([-a-z0-9]*[a-z0-9])?\z/
end
def kubernetes_namespace_regex_message
"can contain only letters, digits or '-', and cannot start or end with '-'"
end
def environment_slug_regex
@environment_slug_regex ||= /\A[a-z]([a-z0-9-]*[a-z0-9])?\z/.freeze
end
def environment_slug_regex_message
"can contain only lowercase letters, digits, and '-'. " \
"Must start with a letter, and cannot end with '-'"
end
end
end
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