Make the dependency on plone.app.content conditional.

This is for `INameFromTitle`, which we want to move to `plone.base`.
See #379 (comment) for why this is not working yet, and we need this workaround.

.meta.toml

@@ -7,7 +7,7 @@ commit-id = "55bda5c9"
 
 [pyproject]
 codespell_ignores = "hove"
-dependencies_ignores = "['plone.app.relationfield', 'plone.directives.form', 'plone.directives.dexterity', 'five.grok', 'plone.app.intid', 'plone.contentrules', 'plone.schema', 'z3c.relationfield']"
+dependencies_ignores = "['plone.app.content', 'plone.app.relationfield', 'plone.directives.form', 'plone.directives.dexterity', 'five.grok', 'plone.app.intid', 'plone.contentrules', 'plone.schema', 'z3c.relationfield']"
 
 [flake8]
 extra_lines = """

news/3858.internal

@@ -0,0 +1,3 @@
+Make the dependency on ``plone.app.content`` conditional.
+This is for ``INameFromTitle``, which we want to move to ``plone.base``.
+[maurits]

plone/app/dexterity/behaviors/configure.zcml

@@ -59,23 +59,25 @@
       for="plone.dexterity.interfaces.IDexterityContent"
       />
 
-  <!-- Title-to-id -->
-  <plone:behavior
-      name="plone.namefromtitle"
-      title="Name from title"
-      description="Automatically generate short URL name for content based on its initial title"
-      provides="plone.app.content.interfaces.INameFromTitle"
-      />
+  <configure zcml:condition="installed plone.app.content">
+    <!-- Title-to-id -->
+    <plone:behavior
+        name="plone.namefromtitle"
+        title="Name from title"
+        description="Automatically generate short URL name for content based on its initial title"
+        provides="plone.app.content.interfaces.INameFromTitle"
+        />
 
-  <!-- File-name-to-id -->
-  <plone:behavior
-      name="plone.namefromfilename"
-      title="Name from file name"
-      description="Automatically generate short URL name for content based on its primary field file name"
-      provides=".filename.INameFromFileName"
-      />
+    <!-- File-name-to-id -->
+    <plone:behavior
+        name="plone.namefromfilename"
+        title="Name from file name"
+        description="Automatically generate short URL name for content based on its primary field file name"
+        provides=".filename.INameFromFileName"
+        />
 
-  <adapter factory=".filename.NameFromFileName" />
+    <adapter factory=".filename.NameFromFileName" />
+  </configure>
 
   <!-- Navigation root -->
   <plone:behavior

pyproject.toml

@@ -92,7 +92,7 @@ Zope = [
   'Products.CMFCore', 'Products.CMFDynamicViewFTI',
 ]
 python-dateutil = ['dateutil']
-ignore-packages = ['plone.app.relationfield', 'plone.directives.form', 'plone.directives.dexterity', 'five.grok', 'plone.app.intid', 'plone.contentrules', 'plone.schema', 'z3c.relationfield']
+ignore-packages = ['plone.app.content', 'plone.app.relationfield', 'plone.directives.form', 'plone.directives.dexterity', 'five.grok', 'plone.app.intid', 'plone.contentrules', 'plone.schema', 'z3c.relationfield']
 
 ##
 # Add extra configuration options in .meta.toml:

setup.py

@@ -62,7 +62,6 @@
         # Plone/Zope core
         "lxml",
         "plone.base",
-        "plone.app.content",
         "plone.app.uuid",
         "plone.app.z3cform>=1.1.0",
         "plone.autoform>=1.1",