frantzmiccoli · March 30, 2020 20:22 · Mar 30, 2020
diff --git a/envcheck b/envcheck
@@ -0,0 +1,77 @@
+#!/usr/bin/env python3
+
+# Usage:
+#     envcheck source/.env.template source/.env
+
+import sys
+
+
+def main():
+    variables_sets_list = _get_variables_set_list()
+    file_paths = sys.argv[1:]
+    reference_file_variables = variables_sets_list[0]
+
+    compared_sets_list = variables_sets_list[1:]
+    missing = False
+    for compared_file_variables_index in range(0, len(compared_sets_list)):
+        compared_file_variables = \
+            compared_sets_list[compared_file_variables_index]
+        relevant_file_path = file_paths[compared_file_variables_index + 1]
+        missing_variables_message = _get_missing_variables_message(
+            reference_file_variables, compared_file_variables,
+            relevant_file_path)
+
+        if missing_variables_message is None:
+            continue
+        missing = True
+        print(missing_variables_message)
+
+    return_code = {True: 1, False: 0}[missing]
+    sys.exit(return_code)
+
+
+def _get_variables_set_list():
+    variables_sets_list = []
+    file_paths = sys.argv[1:]
+    for file_path in file_paths:
+        variables_sets_list.append(_get_file_variables_from_file(file_path))
+
+    if len(variables_sets_list) == 0:
+        raise Exception('Missing target files')
+
+    if len(variables_sets_list) == 1:
+        raise Exception('Missing files to compare with reference')
+
+    return variables_sets_list
+
+
+def _get_file_variables_from_file(file_path):
+    handle = open(file_path, 'r')
+
+    variables = []
+    for line in handle.readlines():
+        parts = line.split('=')
+        if len(parts) < 2:
+            continue
+        variables.append(parts[0])
+
+    handle.close()
+
+    return set(variables)
+
+
+def _get_missing_variables_message(reference_set, compared_set, compared_path):
+    missing_variables_set = reference_set - compared_set
+
+    if len(missing_variables_set) == 0:
+        return None
+    missing_variables = list(missing_variables_set)
+    missing_variables.sort()
+
+    message = compared_path + ' is missing: \n\t' + "\n\t".join(
+        missing_variables)
+    return message
+
+
+if __name__ == '__main__':
+    main()
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