Maven.extract_pom_info: add support for more lookup variable namespac…

…es. (#567)

* Maven.extract_pom_info: add support for more lookup variables.

* Add a TODO to improve maven's parent pom inheritance.

lib/bibliothecary/parsers/maven.rb

@@ -322,6 +322,9 @@ def self.extract_pom_info(xml, location, parent_properties = {})
         extract_pom_dep_info(xml, xml, location, parent_properties)
       end
 
+      # TODO: it might be worth renaming parent_properties to parent_elements
+      # so that more can be inherited from the parent pom than just <properties>
+      # here (see https://maven.apache.org/pom.html#inheritance)
       def self.extract_pom_dep_info(xml, dependency, name, parent_properties = {})
         field = dependency.locate(name).first
         return nil if field.nil?
@@ -363,7 +366,10 @@ def self.property_value(xml, property_name, parent_properties)
         return "${#{property_name}}" if !xml.respond_to?("properties") && parent_properties.empty? && xml.locate(non_prop_name).empty?
 
         prop_field = xml.properties.locate(property_name).first if xml.respond_to?("properties")
-        parent_prop = parent_properties[property_name]
+        parent_prop = parent_properties[property_name] ||                 # e.g. "${foo}"
+          parent_properties[property_name.sub(/^project\./, '')] ||       # e.g. "${project.foo}"
+          parent_properties[property_name.sub(/^project\.parent\./, '')]  # e.g. "${project.parent.foo}"
+
         if prop_field
           prop_field.nodes.first
         elsif parent_prop

lib/bibliothecary/version.rb

@@ -1,3 +1,3 @@
 module Bibliothecary
-  VERSION = "8.5.0"
+  VERSION = "8.5.1"
 end

spec/parsers/maven_spec.rb

@@ -323,7 +323,7 @@
   end
 
   describe 'parent properties' do
-    it 'totally ignores parent propes' do
+    it 'totally ignores parent props' do
       parent_props = {}
       deps = described_class.parse_pom_manifest(load_fixture('pom.xml'), parent_props)
 
@@ -352,6 +352,21 @@
       bibliothecary_dep = deps.find { |dep| dep[:name] == "io.libraries:bibliothecary" }
       expect(bibliothecary_dep[:requirement]).to eq("9.9.9")
     end
+
+    it "can extract parent properties specified with a lookup prefix during resolve" do
+      parent_props = { "scm.url"=>"scm:git:[email protected]:accidia/echo.git" }
+
+      # Esnure that all of these lookup variations resolve to the parent's relevant property.
+      ["project.parent.scm.url", "project.scm.url", "scm.url"].each do |lookup_var|
+        xml = Ox.parse(%Q!
+        <?xml version="1.0" encoding="UTF-8"?>
+        <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+          <scm><url>${#{lookup_var}}</url></scm>
+        </project>!)
+        scm_url = described_class.extract_pom_info(xml, "project/scm/url", parent_props)
+        expect(scm_url).to eq("scm:git:[email protected]:accidia/echo.git")
+      end
+    end
   end
 
   it 'returns property name for missing property values' do