added a custom haml linter in order to avoid hardcoding application name

.haml-lint.yml

@@ -1,4 +1,10 @@
+require:
+  - './lib/linters/application_name_linter.rb'
+
 linters:
+  ApplicationNameLinter:
+    enabled: true
+
   AlignmentTabs:
     enabled: true
 

lib/linters/application_name_linter.rb

@@ -0,0 +1,46 @@
+module HamlLint
+  class Linter::ApplicationNameLinter < Linter
+    include LinterRegistry
+
+    FORBIDDEN = 'demarches-simplifiees.fr'
+    REPLACEMENT = "APPLICATION_NAME"
+    MSG = 'Hardcoding %s is forbidden, use %s instead'
+
+    def visit_tag(node)
+      check(node)
+    end
+
+    def visit_script(node)
+      check(node)
+    end
+
+    def visit_silent_script(node)
+      check(node)
+    end
+
+    def visit_plain(node)
+      check(node)
+    end
+
+    def visit_comment(node)
+      check(node)
+    end
+
+    def visit_haml_comment(node)
+      check(node)
+    end
+
+    def check(node)
+      line = line_text_for_node(node)
+      if line.downcase.include?(FORBIDDEN)
+        record_lint(node, format(MSG, FORBIDDEN, REPLACEMENT))
+      end
+    end
+
+    private
+
+    def line_text_for_node(node)
+      document.source_lines[node.line - 1]
+    end
+  end
+end