forge: Configure tissue for projects.

* guix/forge/forge.scm (<forge-project>)[tissue?]: New field.
(<forge-configuration>)[web-domain]: New field.
(forge-nginx-server-blocks): Do not serve website conventionally if
tissue is enabled.
(forge-tissue-host): New function.
(forge-service-type): Extend tissue-service-type. Do not set up a
default value.
* doc/forge.skb (Reference)[<forge-configuration>]: Document
web-domain.
[<forge-project>]: Document tissue?.

2 files changed, 35 insertions, 3 deletions

diff --git a/doc/forge.skb b/doc/forge.skb
index 4134e70..6e20a67 100644
--- a/doc/forge.skb
+++ b/doc/forge.skb
@@ -516,6 +516,8 @@ gunicorn is run in]))))))
        (record-field "value"
          [Its value]))
      (record-documentation "guix/forge/forge.scm" '<forge-configuration>
+       (record-field "web-domain"
+         [Domain name to serve forge on])
        (record-field "projects"
          [List of ,(record-ref "<forge-project>") objects describing
 projects managed by guix-forge]))
@@ -541,6 +543,12 @@ ownership of its parent directory is granted to the ,(code "laminar")
 user. The idea is that the website is built by a Guix derivation as a
 store item and a symbolic link to that store item is created in the
 parent directory.])
+       (record-field "tissue?"
+         [Does this project use ,(ref :url
+"https://forge.systemreboot.net/tissue/" :text "tissue")? If so, it
+will be served at ,(samp "/<name>/") on the ,(record-field-ref
+"<forge-configuration>" "web-domain") configured in ,(record-ref
+"<forge-configuration>").])
        (record-field "ci-jobs"
          [List of ,(record-ref "<forge-laminar-job>") objects
 describing ,(abbr :short "CI" :long "continuous integration") jobs to
diff --git a/guix/forge/forge.scm b/guix/forge/forge.scm
index abd8a26..09f92c9 100644
--- a/guix/forge/forge.scm
+++ b/guix/forge/forge.scm
@@ -47,6 +47,7 @@
   #:export (forge-service-type
             forge-configuration
             forge-configuration?
+            forge-configuration-web-domain
             forge-configuration-projects
             forge-project
             forge-project?
@@ -57,6 +58,7 @@
             forge-project-repository-branch
             forge-project-web-domain
             forge-project-website-directory
+            forge-project-tissue?
             forge-project-ci-jobs
             forge-project-ci-jobs-trigger
             forge-project-parallel-ci-job-runs
@@ -85,6 +87,8 @@
               (default #f))
   (website-directory forge-project-website-directory
                      (default #f))
+  (tissue? forge-project-tissue?
+           (default #f))
   (ci-jobs forge-project-ci-jobs
            (default '()) (thunked))
   (ci-jobs-trigger forge-project-ci-jobs-trigger ; one of 'post-receive-hook, 'cron, 'webhook
@@ -101,6 +105,7 @@
 (define-record-type* <forge-configuration>
   forge-configuration make-forge-configuration
   forge-configuration?
+  (web-domain forge-configuration-web-domain)
   (projects forge-configuration-projects
             (default '())))
 
@@ -447,16 +452,34 @@ that were built."
   "Return list of @code{<nginx-server-configuration>} extensions for
 forge configuration @var{config}."
   ;; Configure nginx server blocks for projects that have a web domain
-  ;; and a website directory.
+  ;; and a website directory, but do not have tissue enabled.
   (filter-map (match-record-lambda <forge-project>
                   (web-domain website-directory tissue?)
                 (and web-domain
                      website-directory
+                     (not tissue?)
                      (nginx-server-configuration
                       (server-name (list web-domain))
                       (root website-directory))))
               (forge-configuration-projects config)))
 
+(define (forge-tissue-host config)
+  "Return @code{<tissue-host>} object for forge configuration
+@var{config}."
+  (tissue-host
+   (name (forge-configuration-web-domain config))
+   (projects
+    (filter-map (lambda (project)
+                  (and (forge-project-tissue? project)
+                       (tissue-project
+                        (name (forge-project-name project))
+                        ;; The laminar user must own the host state so
+                        ;; that it can run tissue pull.
+                        (user "laminar")
+                        (upstream-repository
+                         (forge-project-repository project)))))
+                (forge-configuration-projects config)))))
+
 (define (forge-ci-jobs config)
   "Return list of CI jobs for forge configuration @var{config}. Each
 value of the returned list is a @code{<forge-laminar-job>} object."
@@ -548,6 +571,8 @@ value is a list of @code{<webhook-hook>} objects."
                                         forge-activation)
                      (service-extension forge-nginx-service-type
                                         forge-nginx-server-blocks)
+                     (service-extension tissue-service-type
+                                        (compose list forge-tissue-host))
                      (service-extension forge-laminar-service-type
                                         forge-ci-jobs+contexts+groups)
                      ;; TODO: Run CI job only if there are new commits
@@ -561,5 +586,4 @@ value is a list of @code{<webhook-hook>} objects."
              (forge-configuration
               (inherit config)
               (projects (append (forge-configuration-projects config)
-                                projects)))))
-   (default-value (forge-configuration))))
+                                projects)))))))