Locally develop slapos.cookbook.

As develop recipes have to be available *before* buildout run add check-recipe
part which will stop buildout in case if recipe is not in develop-eggs.

Fetch recipe using usual buildout commands to interact with buildout's provided
git.

software/erp5/software.cfg

@@ -5,7 +5,13 @@ extends =
 
 versions = versions
 
+# Local development
+develop =
+  ${:parts-directory}/slapos.cookbook-repository
 parts +=
+# Local development
+  slapos.cookbook-repository
+  check-recipe
 # Create instance template
   template
   validator
@@ -15,6 +21,20 @@ parts +=
 # development / fast switching environment for whole software
 unzip = true
 
+# Local development
+[slapos.cookbook-repository]
+recipe = plone.recipe.command
+stop-on-error = true
+location = ${buildout:parts-directory}/${:_buildout_section_name_}
+command = ${git:location}/bin/git clone --quiet http://git.erp5.org/repos/slapos.git ${:location}
+update-command = cd ${:location} && ${git:location}/bin/git pull --quiet
+
+[check-recipe]
+recipe = plone.recipe.command
+stop-on-error = true
+update-command = ${:command}
+command = grep parts ${buildout:develop-eggs-directory}/slapos.cookbook.egg-link
+
 [template-mariadb]
 recipe = slapos.recipe.template
 url = ${:_profile_base_location_}/instance-mariadb.cfg