Add support for bootstrapping Sulu projects

[chirimoya]

With the changes of symfony-cli/symfony-cli#645 and this new Sulu specific upsun template, it is now much easier to create and deploy a new Sulu project on upsun.

Examples:

Basic Sulu project:
symfony new sulu-beta --skeleton=sulu --version=3.0.0-beta-1 --upsun

With Varnish (requires additional config update in the skeleton)
symfony new sulu-beta --skeleton=sulu --version=3.0.0-beta-1 --upsun --service=varnish

Redis as session storage (to scale the application):
symfony new sulu-beta --skeleton=sulu --version=3.0.0-beta-1 --upsun --service=redissession:redis-persistent

[tucksaun]

I see a big chunk of duplication with the original Symfony template (which makes totally sense) but should this mean partials should be introduced with the use of include?

[tucksaun]

You should be able to merge the two loops over $.Services and move routes after services (because keys order in the YAML does not matter)

[chirimoya]

Updated to use a single initial loop to gather the needed information. I’d prefer to keep the original order in the YAML file for better DX and readability.

[chirimoya]

I see a big chunk of duplication with the original Symfony template (which makes totally sense) but should this mean partials should be introduced with the use of include?

@tucksaun could you provide an example of how include would work? I’m not sure how to implement it. Thanks.

[nicolas-grekas]

please rebase and consider this change:

-                "/var": { source: storage, source_path: var }
+                "/var/cache": { source: instance, source_path: var/cache }
+                "/var/cache/prod/pools/app": { source: storage, source_path: var/cache/prod/pools/app }
                 "/public/uploads": { source: storage, source_path: public/uploads }
-                {{ if file_exists "templates/debug/source_code.html.twig" -}}
-                "/data": { source: storage, source_path: "data" }
-                {{- end }}

Also, I see many whitespace control have changed position.
I'd like this file to be as much in sync with the flex-one as possible.
Could you figure out how these differences could minimized?

About "include" as suggested by @tucksaun, this can be done later on.

[chirimoya]

please rebase and consider this change:

-                "/var": { source: storage, source_path: var }
+                "/var/cache": { source: instance, source_path: var/cache }
+                "/var/cache/prod/pools/app": { source: storage, source_path: var/cache/prod/pools/app }
                 "/public/uploads": { source: storage, source_path: public/uploads }
-                {{ if file_exists "templates/debug/source_code.html.twig" -}}
-                "/data": { source: storage, source_path: "data" }
-                {{- end }}

@nicolas-grekas ... are you sure these changes work properly on upsun? I’m getting a Permission denied error during deployment. For Symfony projects as well. The var/cache/prod folder is owned by the root user. Could that be causing the issue?

Otherwise, the template should be ready now. Since I’m not an upsun expert, it might make sense for someone with more experience to review and challenge the template. I did my best, but I have limited experience in this area.