gitlab: Add helper to set up promise to check something via url

Like with [promise-wrapper] a recipe could do

    [promise-<service>]
    <= promise-byurl
    url     = ...

and a script to check such ur will be generated and automatically put
into etc/promise/<service>.

/cc @kazuhiko, @jerome

software/gitlab/instance-gitlab.cfg.in

@@ -326,6 +326,13 @@ tune-command =
 recipe  = slapos.cookbook:wrapper
 wrapper-path = !py! '${directory:promise}/' + '${:_buildout_section_name_}'[8:]
 
+# [promise-<something>] to check <something> by url
+[promise-byurl]
+recipe  = slapos.cookbook:check_url_available
+path    = !py! '${directory:promise}/' + '${:_buildout_section_name_}'[8:]
+dash_path   = {{ bash_bin }}
+curl_path   = {{ curl_bin }}
+http_code   = 200
 
 
 

software/gitlab/instance.cfg.in

@@ -30,7 +30,9 @@ context =
     raw gitlab_shell_repository_location    ${gitlab-shell-repository:location}
 
 # program binaries
+    raw bash_bin                    ${bash:location}/bin/bash
     raw bundler_4gitlab             ${bundler-4gitlab:bundle}
+    raw curl_bin                    ${curl:location}/bin/curl
     raw dcron_bin                   ${dcron-output:crond}
     raw git                         ${git:location}/bin/git
     raw gunzip_bin                  ${gzip:location}/bin/gunzip

software/gitlab/software.cfg

@@ -14,6 +14,8 @@ extends =
     ../../component/nginx/buildout.cfg
 
 #   for instance
+    ../../component/bash/buildout.cfg
+    ../../component/curl/buildout.cfg
     ../../component/gzip/buildout.cfg
     ../../component/dcron/buildout.cfg
     ../../component/logrotate/buildout.cfg
@@ -39,6 +41,8 @@ parts =
     slapos-cookbook
     eggs
 
+    bash
+    curl
     gzip
     dcron-output
     logrotate