Merge branch '39885-ensure-users-cannot-create-environments-with-leading-slashes' into 'master'

Resolve "Environment with starting slash in name causes error"

Closes #39885

See merge request gitlab-org/gitlab-ce!17071

1 files changed, 6 insertions, 2 deletions

diff --git a/lib/gitlab/regex.rb b/lib/gitlab/regex.rb
index 7ab85e1c35c..ac3de2a8f71 100644
--- a/lib/gitlab/regex.rb
+++ b/lib/gitlab/regex.rb
@@ -40,12 +40,16 @@ module Gitlab
       'a-zA-Z0-9_/\\$\\{\\}\\. \\-'
     end
 
+    def environment_name_regex_chars_without_slash
+      'a-zA-Z0-9_\\$\\{\\}\\. -'
+    end
+
     def environment_name_regex
-      @environment_name_regex ||= /\A[#{environment_name_regex_chars}]+\z/.freeze
+      @environment_name_regex ||= /\A[#{environment_name_regex_chars_without_slash}]([#{environment_name_regex_chars}]*[#{environment_name_regex_chars_without_slash}])?\z/.freeze
     end
 
     def environment_name_regex_message
-      "can contain only letters, digits, '-', '_', '/', '$', '{', '}', '.', and spaces"
+      "can contain only letters, digits, '-', '_', '/', '$', '{', '}', '.', and spaces, but it cannot start or end with '/'"
     end
 
     def kubernetes_namespace_regex