Add new package: http-get (#16677)

* Add new package: http-get

* refine version name

var/spack/repos/builtin/packages/http-get/package.py

@@ -0,0 +1,35 @@
+# Copyright 2013-2020 Lawrence Livermore National Security, LLC and other
+# Spack Project Developers. See the top-level COPYRIGHT file for details.
+#
+# SPDX-License-Identifier: (Apache-2.0 OR MIT)
+
+from spack import *
+import datetime
+
+
+class HttpGet(MakefilePackage):
+    """Http_get fetches an HTTP URL and dumps the contents to stdout.
+    It does not do gopher, ftp, file, news, or any other type of URL,
+    only HTTP. It can be configured to do HTTPS fetches as well."""
+
+    homepage = "http://www.acme.com/software/http_get/"
+    url      = "http://www.acme.com/software/http_get/http_get_23May2018.tar.gz"
+
+    version('2018-05-23', sha256='7d46ce25e53b6d3e27a99c1853c3054a046cc97d5e30a713a7ec986cfe7c4fe0')
+
+    def url_for_version(self, version):
+        ver = datetime.datetime.strptime(str(version), '%Y-%m-%d').date()
+        verstr = datetime.datetime.strftime(ver, '%d%b%Y')
+        return "http://www.acme.com/software/http_get/http_get_{0}.tar.gz".format(verstr)
+
+    def edit(self, spec, prefix):
+        makefile = FileFilter("Makefile")
+        makefile.filter("BINDIR =\t/usr/local/bin",
+                        "BINDIR =    {0}/bin".format(self.prefix))
+        makefile.filter("MANDIR =\t/usr/local/man/man1",
+                        "MANDIR={0}/man/man1".format(self.prefix))
+
+    def install(self, spec, prefix):
+        mkdirp(prefix.bin)
+        mkdirp(prefix.man.man1)
+        make('install')