colegatron · August 21, 2018 10:58 · Aug 21, 2018
diff --git a/c.py b/c.py
@@ -0,0 +1,47 @@
+#!/usr/bin/python3
+import os
+import re
+import yaml
+import sys
+
+if not os.getenv("CONFIG_FILE"):
+    print("Usage:")
+    print("$ CONFIG_FILE=the/config.yaml " + sys.argv[0] + "   < exports to yaml by default")
+    print("$ CONFIG_FILE=the/config.yaml " + sys.argv[0] + " yaml")
+    print("$ CONFIG_FILE=the/config.yaml " + sys.argv[0] + " bash")
+    print("$ CONFIG_FILE=the/config.yaml " + sys.argv[0] + " bash CONFIG   < Adds a leading 'CONFIG_' to all vars")
+    sys.exit(1)
+
+data = yaml.load(open(os.getenv("CONFIG_FILE"),'r'))
+
+FMT = sys.argv[1].lower() if len(sys.argv)>1 else "yaml"
+STARTWITH = sys.argv[2].lower() if len(sys.argv)==3 else ""
+
+# Display name and value with format depending on type
+# Values list are joined with commas
+# Values in shell are protected from expansion
+# Shell: caution: remember to quote them in shell to preserve \n and *
+# Force variables, in any case, to contain ony digits, a-z and underscores
+def display_var(k, v):
+  format = "{},{}"
+  if FMT == "yaml": format = "{}: {}"
+  if FMT == "bash": format = "export {}=\"{}\""
+
+  if type(v) is list: v = ",".join(v)
+
+  if FMT == "bash" and isinstance(v,str):
+      v = v.replace("$","\$")
+  k = re.sub("[^a-zA-Z0-9_]", "_", k)
+
+  print(format.format(k, v))
+
+def print_level(data,start_in="", start_with=""):
+    start_in = start_in if not start_with else start_with
+    for subkey in data.keys():
+      if hasattr(data[subkey],'items'):
+        restart_in = start_in + "_" + subkey if start_in else subkey
+        print_level(data[subkey],restart_in)
+      else:
+        display_var((start_in[len(start_with):]+"_"+subkey).upper(), data[subkey])
+
+print_level(data,start_with=STARTWITH)
diff --git a/read.me b/read.me
@@ -0,0 +1,25 @@
+I use yaml files for global environments configuration.
+Each environment (dev, prod, stage) has its own identical 
+structured yaml file with the environment's values.
+
+To use them into bash scripts or containers and docker-compose 
+files as environment variables I just wrote this little script
+to generate the proper output.
+
+CAUTION: It modifies yaml keys in order to make them usable. 
+This feature will force everybody use nice names
+
+Example input:
+cfg:
+  google:
+    ownership_verification:
+      stage.domain.com:
+        upload_file_name: googlec862b21dd0613842e.html
+
+Example output (bash):
+# Variable name modified, original: CFG_GOOGLE_OWNERSHIP_VERIFICATION_STAGE.DOMAIN.COM_UPLOAD_FILE_NAME
+export CFG_GOOGLE_OWNERSHIP_VERIFICATION_STAGE_DOMAIN_COM_UPLOAD_FILE_NAME="googlec862b21dd0613842e.html"
+
+Example output (yaml):
+# Variable name modified, original: CFG_GOOGLE_OWNERSHIP_VERIFICATION_STAGE.DOMAIN.COM_UPLOAD_FILE_NAME
+CFG_GOOGLE_OWNERSHIP_VERIFICATION_STAGE_DOMAIN_COM_UPLOAD_FILE_NAME: googlec862b21dd0613842e.html
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