Add a homebrew.py tool. It's not hooked up yet.

Author: topher800

eol_scons/tools/homebrew.py

@@ -0,0 +1,25 @@
+# Copyright (c) 2007-present, NSF NCAR, UCAR
+#
+# This source code is licensed under the MIT license found in the LICENSE
+# file in the root directory of this source tree.
+"""
+Tool to setup Homebrew for MacOS.
+"""
+
+
+import subprocess
+
+
+def generate(env):
+    if env['PLATFORM'] != 'darwin':
+      return
+
+    brewPrefix = subprocess.run(['brew', '--prefix'], capture_output=True, text=True).stdout.strip()
+
+    env['BREW_PREFIX'] = brewPrefix
+    env.PrependENVPath('PATH', brewPrefix + '/bin')
+    env.AppendUnique(FRAMEWORKPATH=[brewPrefix + '/Frameworks',])
+
+
+def exists(env):
+    return True