Don't maintain a generated Languages.pm file

Fixes #32

perl/.gitignore

@@ -6,3 +6,4 @@ perl5/
 .cpanfile_dependencies
 cpanfile.snapshot
 CHANGELOG.md
+lib/Gherkin/Generated/Languages.pm

perl/Makefile

@@ -43,7 +43,7 @@ clean: ## Remove all build artifacts and files generated by the acceptance tests
 
 .DELETE_ON_ERROR:
 
-acceptance: .built $(TOKENS) $(ASTS) $(PICKLES) $(SOURCES) $(ERRORS) ## Build acceptance test dir and compare results with reference
+acceptance: .built lib/Gherkin/Generated/Languages.pm $(TOKENS) $(ASTS) $(PICKLES) $(SOURCES) $(ERRORS) ## Build acceptance test dir and compare results with reference
 
 .built: perl5 $(SOURCE_FILES)
 	touch $@

perl/dist.ini

@@ -36,10 +36,16 @@ exclude_filename=gherkin-perl.razor
 exclude_filename=Makefile
 exclude_filename=VERSION
 
-[GatherFile]
+[GatherFile / CHANGELOG.md]
 ; explicitly add unversioned files
 root=../
 filename=CHANGELOG.md
 
+[GatherFile / GeneratedLanguages]
+filename=lib/Gherkin/Generated/Languages.pm
+
 [Hook::VersionProvider]
 . = my $v = `cat ./VERSION`; chomp( $v ); $v;
+
+[Run::BeforeBuild]
+run = helper-scripts/build_languages.pl >lib/Gherkin/Generated/Languages.pm