pegtl: version bump (#4621)

* pegtl: version bump

* pegtl: added 2.1.4

* pegtl: reorder versions

* pegtl: fix flake8

var/spack/repos/builtin/packages/pegtl/package.py

@@ -27,7 +27,7 @@
 
 
 # package has a Makefile, but only to build examples
-class Pegtl(Package):
+class Pegtl(CMakePackage):
     """The Parsing Expression Grammar Template Library (PEGTL) is a
         zero-dependency C++11 header-only library for creating parsers
         according to a Parsing Expression Grammar (PEG).
@@ -36,9 +36,15 @@ class Pegtl(Package):
     homepage = "https://github.com/taocpp/PEGTL"
     url      = "https://github.com/taocpp/PEGTL/tarball/1.3.1"
 
-    version('1.3.1', '11efc4beac8f4f5153466d56074e9f0c')
+    version('develop', git='https://github.com/taocpp/PEGTL', branch='master')
+    version('2.1.4', 'e5288b6968e6e910287fce93dc5557bf')
+    version('2.0.0', 'c772828e7188459338a920c21f9896db')
 
-    def install(self, spec, prefix):
-        mkdirp(prefix.include)
-        install_tree('pegtl', join_path(prefix.include, 'pegtl'))
-        install('pegtl.hh', prefix.include)
+    variant('debug', default=False, description='Build debug version')
+
+    def build_type(self):
+        spec = self.spec
+        if '+debug' in spec:
+            return 'Debug'
+        else:
+            return 'Release'