feat: parse dpkg catalogue

1 files changed, 53 insertions, 0 deletions

diff --git a/lib/spandx/os/parsers/dpkg.rb b/lib/spandx/os/parsers/dpkg.rb
new file mode 100644
index 0000000..c2c4637
--- /dev/null
+++ b/lib/spandx/os/parsers/dpkg.rb
@@ -0,0 +1,53 @@
+# frozen_string_literal: true
+
+module Spandx
+  module Os
+    module Parsers
+      class Dpkg < ::Spandx::Core::Parser
+        def match?(path)
+          path.basename.fnmatch?('status')
+        end
+
+        def parse(lockfile)
+          path = lockfile.to_s
+
+          [].tap do |items|
+            lockfile.open(mode: 'r') do |io|
+              each_package(io) do |data|
+                items.push(map_from(data, path))
+              end
+            end
+          end
+        end
+
+        private
+
+        def each_package(io)
+          package = {}
+
+          until io.eof?
+            line = io.readline.chomp
+            next if line.start_with?(" ")
+
+            if line.empty?
+              yield package
+
+              package = {}
+            else
+              line.split(':').tap { |(key, *value)| package[key] = value&.join(':')&.strip }
+            end
+          end
+        end
+
+        def map_from(data, path)
+          ::Spandx::Core::Dependency.new(
+            path: path,
+            name: data['Package'],
+            version: data['Version'],
+            meta: data
+          )
+        end
+      end
+    end
+  end
+end