SERVER-17789 Do not use option values to configure the variant directory

1 files changed, 37 insertions, 0 deletions

diff --git a/site_scons/mongo_scons_utils.py b/site_scons/mongo_scons_utils.py
new file mode 100644
index 00000000000..1ddaf9915dd
--- /dev/null
+++ b/site_scons/mongo_scons_utils.py
@@ -0,0 +1,37 @@
+import md5
+
+def default_variant_dir_generator(target, source, env, for_signature):
+
+    if env.GetOption('cache') != None:
+        return 'cached'
+
+    # If an option should affect the variant directory, name it here.
+    variant_options = [
+        'opt',
+        'dbg',
+    ]
+
+    # Hash the named options and their values, and take the first 8 characters of the hash as
+    # the variant name
+    hasher = md5.md5()
+    for option in variant_options:
+        hasher.update(option)
+        hasher.update(str(env.GetOption(option)))
+    variant_dir = hasher.hexdigest()[0:8]
+
+    # If our option hash yields a well known hash, replace it with its name.
+    known_variant_hashes = {
+        '343e6678' : 'debug',
+        '85fcf9b0' : 'opt',
+        '981ce870' : 'debug',
+        '9fface73' : 'optdebug',
+        'c52b1cc3' : 'opt',
+    }
+
+    return known_variant_hashes.get(variant_dir, variant_dir)
+
+
+def os_specific_variant_dir_generator(target, source, env, for_signature):
+    return '-'.join([
+        env['TARGET_OS'],
+        default_variant_dir_generator(target, source, env, for_signature)])