Avoid repeated dashes in $CI_ENVIRONMENT_SLUG

1 files changed, 13 insertions, 5 deletions

diff --git a/db/migrate/20161207231626_add_environment_slug.rb b/db/migrate/20161207231626_add_environment_slug.rb
index 7153e6a32b1..8e98ee5b9ba 100644
--- a/db/migrate/20161207231626_add_environment_slug.rb
+++ b/db/migrate/20161207231626_add_environment_slug.rb
@@ -8,8 +8,9 @@ class AddEnvironmentSlug < ActiveRecord::Migration
   DOWNTIME_REASON = 'Adding NOT NULL column environments.slug with dependent data'
 
   # Used to generate random suffixes for the slug
+  LETTERS = 'a'..'z'
   NUMBERS = '0'..'9'
-  SUFFIX_CHARS = ('a'..'z').to_a + NUMBERS.to_a
+  SUFFIX_CHARS = LETTERS.to_a + NUMBERS.to_a
 
   def up
     environments = Arel::Table.new(:environments)
@@ -39,17 +40,24 @@ class AddEnvironmentSlug < ActiveRecord::Migration
     slugified = name.to_s.downcase.gsub(/[^a-z0-9]/, '-')
 
     # Must start with a letter
-    slugified = "env-" + slugified if NUMBERS.cover?(slugified[0])
+    slugified = 'env-' + slugified unless LETTERS.cover?(slugified[0])
+
+    # Repeated dashes are invalid (OpenShift limitation)
+    slugified.gsub!(/\-+/, '-')
 
     # Maximum length: 24 characters (OpenShift limitation)
     slugified = slugified[0..23]
 
-    # Cannot end with a "-" character (Kubernetes label limitation)
-    slugified = slugified[0..-2] if slugified[-1] == "-"
+    # Cannot end with a dash (Kubernetes label limitation)
+    slugified.chop! if slugified.end_with?('-')
 
     # Add a random suffix, shortening the current string if necessary, if it
     # has been slugified. This ensures uniqueness.
-    slugified = slugified[0..16] + "-" + random_suffix if slugified != name
+    if slugified != name
+      slugified = slugified[0..16]
+      slugified << '-' unless slugified.end_with?('-')
+      slugified << random_suffix
+    end
 
     slugified
   end