Add detect-secrets hook & baseline

.pre-commit-config.yaml

@@ -33,3 +33,10 @@
         args:
         - --add-import
         - from __future__ import absolute_import
+-   repo: https://github.com/Yelp/detect-secrets
+    sha: 0.9.1
+    hooks:
+    -   id: detect-secrets
+        args: ['--baseline', '.secrets.baseline']
+        exclude: .*tests/.*|\.pre-commit-config\.yaml
+        language_version: python2.7

.secrets.baseline

@@ -0,0 +1,27 @@
+{
+  "exclude_regex": ".*tests/.*|\\.pre-commit-config\\.yaml", 
+  "generated_at": "2018-12-11T20:18:23Z", 
+  "plugins_used": [
+    {
+      "base64_limit": 4.5, 
+      "name": "Base64HighEntropyString"
+    }, 
+    {
+      "hex_limit": 3, 
+      "name": "HexHighEntropyString"
+    }, 
+    {
+      "name": "PrivateKeyDetector"
+    }
+  ], 
+  "results": {
+    ".travis.yml": [
+      {
+        "hashed_secret": "20bccf6b10adb3faf8ef4552f5ec21b2767501ac", 
+        "line_number": 18, 
+        "type": "Base64 High Entropy String"
+      }
+    ]
+  }, 
+  "version": "0.9.1"
+}