lib/bundler/audit/database.rb
#
# Copyright (c) 2013-2022 Hal Brodigan (postmodern.mod3 at gmail.com)
#
# bundler-audit is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# bundler-audit is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with bundler-audit. If not, see <https://www.gnu.org/licenses/>.
#
require 'bundler/audit/advisory'
require 'time'
require 'yaml'
module Bundler
module Audit
#
# Represents the directory of advisories, grouped by gem name
# and CVE number.
#
class Database
class DownloadFailed < RuntimeError
end
class UpdateFailed < RuntimeError
end
# Git URL of the ruby-advisory-db.
URL = 'https://github.com/rubysec/ruby-advisory-db.git'
# Path to the user's copy of the ruby-advisory-db.
USER_PATH = File.expand_path(File.join(Gem.user_home,'.local','share','ruby-advisory-db'))
# Default path to the ruby-advisory-db.
#
# @since 0.8.0
DEFAULT_PATH = ENV.fetch('BUNDLER_AUDIT_DB',USER_PATH)
# The path to the advisory database.
#
# @return [String]
attr_reader :path
#
# Initializes the Advisory Database.
#
# @param [String] path
# The path to the advisory database.
#
# @raise [ArgumentError]
# The path was not a directory.
#
def initialize(path=self.class.path)
unless File.directory?(path)
raise(ArgumentError,"#{path.dump} is not a directory")
end
@path = path
end
#
# The default path for the database.
#
# @return [String]
# The path to the database directory.
#
def self.path
DEFAULT_PATH
end
#
# Tests whether the database exists.
#
# @param [String] path
# The given path of the database to check.
#
# @return [Boolean]
#
# @since 0.8.0
#
def self.exists?(path=DEFAULT_PATH)
File.directory?(path) && !(Dir.entries(path) - %w[. ..]).empty?
end
#
# Downloads the ruby-advisory-db.
#
# @param [Hash] options
# Additional options.
#
# @option options [String] :path (DEFAULT_PATH)
# The destination path for the new ruby-advisory-db.
#
# @option options [Boolean] :quiet
# Specify whether `git` should be `--quiet`.
#
# @return [Dataase]
# The newly downloaded database.
#
# @raise [DownloadFailed]
# Indicates that the download failed.
#
# @note
# Requires network access.
#
# @since 0.8.0
#
def self.download(options={})
unless (options.keys - [:path, :quiet]).empty?
raise(ArgumentError,"Invalid option(s)")
end
path = options.fetch(:path,DEFAULT_PATH)
command = %w[git clone]
command << '--quiet' if options[:quiet]
command << URL << path
unless system(*command)
raise(DownloadFailed,"failed to download #{URL} to #{path.inspect}")
end
return new(path)
end
#
# Updates the ruby-advisory-db.
#
# @param [Hash] options
# Additional options.
#
# @option options [Boolean] :quiet
# Specify whether `git` should be `--quiet`.
#
# @return [Boolean]
# Specifies whether the update was successful.
#
# @raise [ArgumentError]
# Invalid options were given.
#
# @note
# Requires network access.
#
# @since 0.3.0
#
# @deprecated Use {#update!} instead.
#
def self.update!(options={})
raise "Invalid option(s)" unless (options.keys - [:quiet]).empty?
if File.directory?(DEFAULT_PATH)
begin
new(DEFAULT_PATH).update!(options)
rescue UpdateFailed then false
end
else
begin
download(options.merge(path: DEFAULT_PATH))
rescue DownloadFailed then false
end
end
end
#
# Determines if the database is a git repository.
#
# @return [Boolean]
#
# @since 0.8.0
#
def git?
File.directory?(File.join(@path,'.git'))
end
#
# Updates the ruby-advisory-db.
#
# @param [Hash] options
# Additional options.
#
# @option options [Boolean] :quiet
# Specify whether `git` should be `--quiet`.
#
# @return [true, nil]
# * `true` - the ruby-advisory-db git repository was successfully
# updated.
# * `nil` - the ruby-advisory-db is not a git repository or the `git`
# command is not installed.
#
# @raise [UpdateFailed]
# Could not update the ruby-advisory-db git repository.
#
# @since 0.8.0
#
def update!(options={})
if git?
Dir.chdir(@path) do
command = %w[git pull]
command << '--quiet' if options[:quiet]
command << 'origin' << 'master'
unless system(*command)
raise(UpdateFailed,"failed to update #{@path.inspect}")
end
return true
end
end
end
#
# The last commit ID of the repository.
#
# @return [String, nil]
# The commit hash or `nil` if the database is not a git repository.
#
# @since 0.9.0
#
def commit_id
if git?
Dir.chdir(@path) do
`git rev-parse HEAD`.chomp
end
end
end
#
# Determines the time when the database was last updated.
#
# @return [Time]
#
# @since 0.8.0
#
def last_updated_at
if git?
Dir.chdir(@path) do
Time.parse(`git log --date=iso8601 --pretty="%cd" -1`)
end
else
File.mtime(@path)
end
end
#
# Enumerates over every advisory in the database.
#
# @yield [advisory]
# If a block is given, it will be passed each advisory.
#
# @yieldparam [Advisory] advisory
# An advisory from the database.
#
# @return [Enumerator]
# If no block is given, an Enumerator will be returned.
#
def advisories(&block)
return enum_for(__method__) unless block_given?
each_advisory_path do |path|
yield Advisory.load(path)
end
end
#
# Enumerates over advisories for the given gem.
#
# @param [String] name
# The gem name to lookup.
#
# @yield [advisory]
# If a block is given, each advisory for the given gem will be yielded.
#
# @yieldparam [Advisory] advisory
# An advisory for the given gem.
#
# @return [Enumerator]
# If no block is given, an Enumerator will be returned.
#
def advisories_for(name)
return enum_for(__method__,name) unless block_given?
each_advisory_path_for(name) do |path|
yield Advisory.load(path)
end
end
#
# Verifies whether the gem is effected by any advisories.
#
# @param [Gem::Specification] gem
# The gem to verify.
#
# @yield [advisory]
# If a block is given, it will be passed advisories that effect
# the gem.
#
# @yieldparam [Advisory] advisory
# An advisory that effects the specific version of the gem.
#
# @return [Enumerator]
# If no block is given, an Enumerator will be returned.
#
def check_gem(gem)
return enum_for(__method__,gem) unless block_given?
advisories_for(gem.name) do |advisory|
if advisory.vulnerable?(gem.version)
yield advisory
end
end
end
#
# The number of advisories within the database.
#
# @return [Integer]
# The number of advisories.
#
def size
each_advisory_path.count
end
#
# Converts the database to a String.
#
# @return [String]
# The path to the database.
#
def to_s
@path
end
#
# Inspects the database.
#
# @return [String]
# The inspected database.
#
def inspect
"#<#{self.class}:#{self}>"
end
protected
#
# Enumerates over every advisory path in the database.
#
# @yield [path]
# The given block will be passed each advisory path.
#
# @yieldparam [String] path
# A path to an advisory `.yml` file.
#
def each_advisory_path(&block)
Dir.glob(File.join(@path,'gems','*','*.yml'),&block)
end
#
# Enumerates over the advisories for the given gem.
#
# @param [String] name
# The gem of the gem.
#
# @yield [path]
# The given block will be passed each advisory path.
#
# @yieldparam [String] path
# A path to an advisory `.yml` file.
#
def each_advisory_path_for(name,&block)
Dir.glob(File.join(@path,'gems',name,'*.yml'),&block)
end
end
end
end