Fix CI_PROJECT_PATH_SLUG slugify

app/models/ci/build.rb

@@ -194,10 +194,7 @@ module Ci
     #   * Maximum length is 63 bytes
     #   * First/Last Character is not a hyphen
     def ref_slug
-      ref.to_s
-          .downcase
-          .gsub(/[^a-z0-9]/, '-')[0..62]
-          .gsub(/(\A-+|-+\z)/, '')
+      Gitlab::Utils.slugify(ref.to_s)
     end
 
     # Variables whose value does not depend on environment

app/models/project.rb

@@ -1283,12 +1283,16 @@ class Project < ActiveRecord::Base
     status.zero?
   end
 
+  def full_path_slug
+    Gitlab::Utils.slugify(full_path.to_s)
+  end
+
   def predefined_variables
     [
       { key: 'CI_PROJECT_ID', value: id.to_s, public: true },
       { key: 'CI_PROJECT_NAME', value: path, public: true },
       { key: 'CI_PROJECT_PATH', value: full_path, public: true },
-      { key: 'CI_PROJECT_PATH_SLUG', value: full_path.parameterize, public: true },
+      { key: 'CI_PROJECT_PATH_SLUG', value: full_path_slug, public: true },
       { key: 'CI_PROJECT_NAMESPACE', value: namespace.full_path, public: true },
       { key: 'CI_PROJECT_URL', value: web_url, public: true }
     ]

changelogs/unreleased/34643-fix-project-path-slugify.yml

+---
+title: Fix CI_PROJECT_PATH_SLUG slugify
+merge_request: 13350
+author: Ivan Chernov

lib/gitlab/utils.rb

@@ -14,6 +14,19 @@ module Gitlab
       str.force_encoding(Encoding::UTF_8)
     end
 
+    # A slugified version of the string, suitable for inclusion in URLs and
+    # domain names. Rules:
+    #
+    #   * Lowercased
+    #   * Anything not matching [a-z0-9-] is replaced with a -
+    #   * Maximum length is 63 bytes
+    #   * First/Last Character is not a hyphen
+    def slugify(str)
+      return str.downcase
+        .gsub(/[^a-z0-9]/, '-')[0..62]
+        .gsub(/(\A-+|-+\z)/, '')
+    end
+
     def to_boolean(value)
       return value if [true, false].include?(value)
       return true if value =~ /^(true|t|yes|y|1|on)$/i

spec/lib/gitlab/utils_spec.rb

 require 'spec_helper'
 
 describe Gitlab::Utils do
-  delegate :to_boolean, :boolean_to_yes_no, to: :described_class
+  delegate :to_boolean, :boolean_to_yes_no, :slugify, to: :described_class
+
+  describe '.slugify' do
+    {
+      'TEST' => 'test',
+      'project_with_underscores' => 'project-with-underscores',
+      'namespace/project' =>  'namespace-project',
+      'a' * 70 => 'a' * 63,
+      'test_trailing_' => 'test-trailing'
+    }.each do |original, expected|
+      it "slugifies #{original} to #{expected}" do
+        expect(slugify(original)).to eq(expected)
+      end
+    end
+  end
 
   describe '.to_boolean' do
     it 'accepts booleans' do

spec/models/ci/build_spec.rb

@@ -1220,7 +1220,7 @@ describe Ci::Build do
         { key: 'CI_PROJECT_ID', value: project.id.to_s, public: true },
         { key: 'CI_PROJECT_NAME', value: project.path, public: true },
         { key: 'CI_PROJECT_PATH', value: project.full_path, public: true },
-        { key: 'CI_PROJECT_PATH_SLUG', value: project.full_path.parameterize, public: true },
+        { key: 'CI_PROJECT_PATH_SLUG', value: project.full_path_slug, public: true },
         { key: 'CI_PROJECT_NAMESPACE', value: project.namespace.full_path, public: true },
         { key: 'CI_PROJECT_URL', value: project.web_url, public: true },
         { key: 'CI_PIPELINE_ID', value: pipeline.id.to_s, public: true },