1.
Automake Makefile.am GNUmakefile.am *.am
Rake     Rakefile *.rake
foo      [Mm]akefile GNUmakefile
2.
Ruby     [Mm]akefile GNUmakefile *.rb *.ruby *.html
3.
Automake Makefile.am GNUmakefile.am *.am
Rake     Rakefile *.rake
Ruby     [Mm]akefile GNUmakefile *.rb *.ruby *.html
4.
Ruby     [Mm]akefile GNUmakefile *.rb *.ruby *.html
5.
HTML     *.htm *.html