Add requirements

terrabutler/requirements.py

@@ -0,0 +1,25 @@
+def check_requirements():
+    """
+    Check requirements before running the application.
+    """
+    from terrabutler.settings import validate_settings
+    from os import getenv, path
+    from colorama import Fore
+
+    if getenv("TERRABUTLER_ENABLE") != "true":
+        print(Fore.YELLOW + "Terrabutler is not currently enabled on this"
+              " folder. Please set 'TERRABUTLER_ENABLE' in your environment"
+              " to true to enable it.")
+        exit(1)
+    root = getenv("TERRABUTLER_ROOT")
+    if root is None or not path.exists(root):
+        print(Fore.RED + "Terrabutler can't determine the root folder of"
+              " your project or it doesn't exist.\nPlease set"
+              " 'TERRABUTLER_ROOT' in your environment pointing"
+              " to the root folder of your project.")
+        exit(1)
+    if not path.exists(root + "configs/settings.yml"):
+        print(Fore.RED + "Terrabutler can't find you settings file\nPlease"
+              " create a 'settings.yml' file inside the 'configs' folder.")
+        exit(1)
+    validate_settings()

terrabutler/settings.py

@@ -1,9 +1,9 @@
 from colorama import Fore
-from os import path
+from os import getenv, path
 from schema import Schema, SchemaError
 import yaml
 
-PATH = path.realpath("configs/settings.yml")
+PATH = path.realpath(getenv("TERRABUTLER_ROOT") + "configs/settings.yml")
 SCHEMA = Schema({
     "general": {
         "organization": str,