Support revision and branch overriding.

software/erp5/software.cfg

@@ -26,9 +26,11 @@ unzip = true
 [slapos.cookbook-repository]
 recipe = plone.recipe.command
 stop-on-error = true
+branch = erp5
+revision =
 location = ${buildout:parts-directory}/${:_buildout_section_name_}
-command = ${git:location}/bin/git clone --branch erp5 --quiet http://git.erp5.org/repos/slapos.git ${:location}
-update-command = cd ${:location} && GIT_COMMITTER_EMAIL=nobody@example.com GIT_AUTHOR_NAME=Nobody GIT_AUTHOR_EMAIL=nobody@example.com ${git:location}/bin/git pull --quiet
+command = ${git:location}/bin/git clone --branch ${:branch} --quiet http://git.erp5.org/repos/slapos.git ${:location} && if [ -n "${:revision} "]; then cd ${:location} && ${git:location}/bin/git reset --quiet --hard ${:revision} ; fi
+update-command = cd ${:location} && GIT_COMMITTER_EMAIL=nobody@example.com GIT_AUTHOR_NAME=Nobody GIT_AUTHOR_EMAIL=nobody@example.com ${git:location}/bin/git pull --quiet && if [ -n "${:revision}" ]; then echo "Resetting." ; cd ${:location} && ${git:location}/bin/git reset --hard ${:revision} ; fi
 
 [check-recipe]
 recipe = plone.recipe.command