warn on invalid publication date, fixes #98

lib/relaton_bib.rb

@@ -57,6 +57,9 @@ def parse_date(date, str = true) # rubocop:disable Metrics/CyclomaticComplexity,
     def format_date(date, format, str, outformat = nil)
       date = Date.strptime(date, format)
       str ? date.strftime(outformat || format) : date
+    rescue Date::Error => e
+      Util.warn "#{date} #{e.message}"
+      date
     end
 
     # @param arr [nil, Array, #is_a?]

lib/relaton_bib/version.rb

@@ -1,3 +1,3 @@
 module RelatonBib
-  VERSION = "1.20.3".freeze
+  VERSION = "1.20.4".freeze
 end

spec/relaton_bib_spec.rb

@@ -39,6 +39,12 @@
       expect(RelatonBib.parse_date("2012-2")).to eq "2012-02"
       expect(RelatonBib.parse_date("2012-2", false)).to eq Date.new(2012, 2, 1)
     end
+
+    it "invalid date" do
+      expect do
+        expect(RelatonBib.parse_date("2012-02-31")).to eq "2012-02-31"
+      end.to output(/invalid date/).to_stderr_from_any_process
+    end
   end
 
   it "parse YAML with an old version of Psych" do