Only output length if using it

Closes https://git.autonomic.zone/coop-cloud/abra/issues/67.

CHANGELOG.md

@@ -1,5 +1,6 @@
 # abra x.x.x (UNRELEASED)
 
+- Avoid outputting length during secret generation when not in use ([#67](https://git.autonomic.zone/coop-cloud/abra/issues/67))
 - Support graceful failure when missing secret generation commands ([44d3ac3a1cb86edc9b9e91eea1a00e70eae14965](https://git.autonomic.zone/coop-cloud/abra/commit/44d3ac3a1cb86edc9b9e91eea1a00e70eae14965))
 - Fix secret detection when using new `.env` file format in apps ([55324524ca77141666ffe6cc41b62cc71cf89ace](https://git.autonomic.zone/coop-cloud/abra/commit/55324524ca77141666ffe6cc41b62cc71cf89ace))
 - Support choosing an `$EDITOR` when editing configs ([29cc392dff3e93e48e0e2edd3ce11b405c66a95a](https://git.autonomic.zone/coop-cloud/abra/commit/29cc392dff3e93e48e0e2edd3ce11b405c66a95a))

abra

@@ -459,7 +459,12 @@ parse_secret() {
 
   abra__version_="$(echo "$SECRET" | sed -n 's/.*\(v[0-9]\).*/\1/p')"
 
+  if [[ "$SECRET" == *"length"* ]]; then
     echo "Generating $abra__secret_, version: $abra__version_, length: $abra__length_"
+  else
+    echo "Generating $abra__secret_, version: $abra__version_"
+  fi
+
   sub_app_secret_generate
 }