path: root/doc/forge.skb

;;; guix-forge --- Guix software forge meta-service
;;; Copyright © 2022, 2023 Arun Isaac <arunisaac@systemreboot.net>
;;;
;;; This file is part of guix-forge.
;;;
;;; guix-forge is free software: you can redistribute it and/or modify
;;; it under the terms of the GNU General Public License as published
;;; by the Free Software Foundation, either version 3 of the License,
;;; or (at your option) any later version.
;;;
;;; guix-forge is distributed in the hope that it will be useful, but
;;; WITHOUT ANY WARRANTY; without even the implied warranty of
;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
;;; General Public License for more details.
;;;
;;; You should have received a copy of the GNU General Public License
;;; along with guix-forge.  If not, see
;;; <https://www.gnu.org/licenses/>.

(use-modules (skribilo source lisp)
             (doc skribilo))

(document :title [guix-forge]
  (toc :subsection #t)
  (chapter :title [Introduction]
           :ident "chapter-introduction"
    (p [guix-forge is a Guix service that lets you run a complete
,(ref :url "https://en.wikipedia.org/wiki/Forge_(software)"
:text "software forge") in the manner of GitHub, GitLab, etc. Unlike
other free software forges such as GitLab, Gitea, etc., guix-forge is
not a monolith but is an assemblage of several pieces of server
software wired up to function as one. In this sense, it is a
,(emph "meta-service"). guix-forge does for software forges what ,(ref
:url "https://mailinabox.email/" :text "Mail-in-a-Box") does for
email.])
    (p [guix-forge integrates the following software components:]
       (itemize
        (item [,(ref :url "https://git.zx2c4.com/cgit/" :text "cgit")
and ,(ref :url "https://github.com/jonashaag/klaus/" :text "klaus")
(pick your favourite) to serve project git repositories on the web])
        (item [,(ref :url "https://laminar.ohwg.net/" :text "laminar")
for continuous integration])
        (item [,(ref :url "https://github.com/ndilieto/uacme/" :text
"uacme") and ,(ref :url "https://gnutls.org/" :text "gnutls") for
automatic provision and renewal of TLS certificates via ACME])))
    (p [In the future, it will also provide:]
       (itemize
        (item [web server to serve static project sites])
        (item [,(ref :url "https://public-inbox.org/README.html"
:text "public-inbox") for project discussions])))
    (p [A choice of different software components may be offered
provided it does not complicate the interface too much.])
    (p [guix-forge is provided on a best effort basis. Its
design is unstable, and open to change. We will try our best to not
break your system configuration often, but it might happen.])
    (section :title [Philosophy]
      (p [In order to empower ordinary users, software should not just
be free (as in freedom), but also be simple and easy to deploy,
especially for small-scale deployments. guix-forge is therefore
minimalistic, and does not require running large database servers such
as MariaDB and PostgreSQL.])
      (p [While some state is inevitable, server software should
strive to be as stateless as an old analog television set. You switch
it on, and it works all the time. There are no pesky software updates,
and complex hidden state. guix-forge tries to be as stateless as
possible. Almost all of guix-forge's state can be version controlled,
and the rest are simple files that can be backed up easily.])
      (p [,(ref
:url "https://drewdevault.com/2018/07/23/Git-is-already-distributed.html"
:text "Git is already federated and decentralized") with
email. guix-forge acknowledges this and prefers to support git's ,(ref
:url "https://drewdevault.com/2018/07/02/Email-driven-git.html"
:text "email driven workflow") with project discussion, bug reports
and patches all happening over email.])
      (p [guix-forge is opinionated and will not expose all features
provided by the software components underlying it. Keeping
configuration options to a minimum is necessary to help casual users
deploy their own forge, and to reduce the likelihood of configuration
bugs.])))
  (chapter :title [Tutorial]
           :ident "chapter-tutorial"
    (p [In this tutorial, you will learn how to set up guix-forge to
host continuous integration for a project. For the purposes of this
tutorial, we will set up continuous integration for the ,(ref :url
[https://github.com/aconchillo/guile-json] :text [guile-json])
project.])
    (p [First, we clone the upstream guile-json repository into a
local bare clone at ,(file [/srv/git/guile-json]).])
    (prog [$ git clone --bare https://github.com/aconchillo/guile-json /srv/git/guile-json
Cloning into bare repository '/srv/git/guile-json'...
remote: Enumerating objects: 1216, done.
remote: Counting objects: 100% (162/162), done.
remote: Compressing objects: 100% (107/107), done.
remote: Total 1216 (delta 96), reused 106 (delta 54), pack-reused 1054
Receiving objects: 100% (1216/1216), 276.10 KiB \| 3.89 MiB/s, done.
Resolving deltas: 100% (742/742), done.]
          :line #f)
    (p [Now that we have a git repository to work with, we start
writing our Guix system configuration. We begin with a bunch of ,(code
[use-modules]) statements importing all required modules.])
    (prog (source :language scheme
                  :file "doc/snippets/tutorial.scm"
                  :start 0 :stop 9)
          :line #f)
    (p [Then, we define the ,(ref :url
"https://guix.gnu.org/en/manual/devel/en/html_node/G_002dExpressions.html"
:text "G-expression") that will be run as a continuous integration job
on every commit. This G-expression uses ,(code [invoke]) from ,(code
[(guix build utils)]). Hence, we make it available to the G-expression
using ,(code [with-imported-modules]). In addition, it needs a number
of packages which we make available using ,(code [with-packages]). And
finally, within the body of the G-expression, we have commands cloning
the git repository, building the source and running the tests.])
    (p [The attentive reader may notice what looks like ,(code [(guix
build utils)]) being referenced twice—once with ,(code
[with-imported-modules]) and again with ,(code [use-modules]). This is
not a mistake. G-expressions are serialized into Guile scripts. ,(code
[with-imported-modules]) ensures that code for ,(code [(guix build
utils)]) is available and is in the ,(ref :url
"https://www.gnu.org/software/guile/manual/html_node/Load-Paths.html"
:text "load path"). ,(code [use-modules]) actually imports ,(code
[(guix build utils)]) when the script runs. ,(code
[with-imported-modules]) is like installing a library in your system,
and ,(code [use-modules]) is like actually importing that library in a
script. Both are necessary.])
    (prog (source :language scheme
                  :file "doc/snippets/tutorial.scm"
                  :start 11 :stop 22)
          :line #f)
    (p [Now, we configure a ,(code [<forge-project>]) record that
holds metadata about the project and wires up the G-expression we just
defined into a continuous integration job.])
    (prog (source :language scheme
                  :file "doc/snippets/tutorial.scm"
                  :start 24 :stop 32)
          :line #f)
    (p [The ,(code [name]) and ,(code [description]) fields are
hopefully self-explanatory. The ,(code [user]) field specifies the
user who will own the git repository at the path specified by ,(code
[repository]). That user will therefore be able to push into the
repository through ssh or similar. git provides various ,(ref :url
"https://git-scm.com/book/en/v2/Customizing-Git-Git-Hooks" :text
"server-side hooks") that trigger on various events. Of these, the
,(file [post-receive]) hook triggers when pushed commits are
received. guix-forge sets up a ,(source-ref "guix/forge/forge.scm"
"\\(define\\* \\(ci-jobs-trigger-gexp" "post-receive hook script") in
the repository to trigger a continuous integration run on every
,(command [git push]).])
    (p [And finally, we put everything together in an ,(code
[operating-system]) declaration. Notice the forge service configured
with ,(code [guile-json-project]) and the laminar service configured
with a port for the web interface to listen on.])
    (prog (source :language scheme
                  :file "doc/snippets/tutorial.scm"
                  :start 34)
          :line #f)
    (p [Now that we have a complete ,(code [operating-system])
definition, let's use the following command to build a
container. After a lot of building, a container script should pop
out.])
    (prog [$ guix system container --network --share=/srv/git/guile-json tutorial.scm
/gnu/store/ilg7c2hpkxhwircxpz22qhjsqp3i9har-run-container]
          :line #f)
    (p [The ,(code [--network]) flag specifies that the container
should share the network namespace of the host. To us, this means that
all ports opened by the container will be visible on the host without
any port forwarding or complicated configuration. The ,(code
[--share=/srv/git/guile-json]) option shares the git repository we
cloned earlier, with the container.])
    (p [To start the container, simply run the container script as
root.])
    (prog [# /gnu/store/ilg7c2hpkxhwircxpz22qhjsqp3i9har-run-container]
          :line #f)
    (p [Now, you can see the status of laminar and running jobs
through its web interface listening on ,(ref
:url "http://localhost:8080"). You can list and queue jobs on the
command-line like so:])
    (prog [$ laminarc show-jobs
guile-json
$ laminarc queue guile-json
guile-json:1]
          :line #f)
    (p [That's it! You just set up your own continuous integration
system and took the first steps to owning your code!])
    (p [You could easily use the same configuration to configure a
Guix system instead of a container. To do so, you will have to take
care of defining the bootloader, file systems and other settings as
per your needs. The overall configuration used in this tutorial is
repeated below for your reference.])
    (prog (source :language scheme
                  :file "doc/snippets/tutorial.scm")))
  (chapter :title [How To]
           :ident "chapter-how-to"
    (section :title [How to set up cgit]
             :ident "section-how-to-set-up-cgit"
      (p [guix-forge comes with an end-to-end cgit solution that not
only sets up cgit itself but also an nginx server complete with
automatically renewed TLS certificates. cgit even runs in its own
container for maximal security.])
      (p [The cgit service uses the forge-nginx service as its web
server. The forge-nginx service in turn uses the ACME service to fetch
and renew TLS certificates. Here's a minimal working configuration.])
      (prog (source :language scheme
                    :file "doc/snippets/how-to-set-up-cgit.scm")
            :line #f)
      (p [The cgit service configuration specifies the domain ,(samp
[git.example.org]) to serve cgit on and the ,(file "/srv/git")
repository directory containing bare git repositories to publish. The
forge nginx service configuration specifies the ports to serve HTTP
and HTTPS on. The ACME service configuration specifies the email
address to register an ACME account with. The sudoers file declaration
is required to allow the ,(samp [acme]) user to restart the nginx
server when a certificate is renewed. The configured machine will
start out with self-signed certificates. Run ,(samp [/usr/bin/acme
renew]) the first time to get CA-issued certificates. Thereafter,
certificates will auto-renew via a cron job.])
      (p [When testing your deployment, it might help to start with
the Let's Encrypt staging server as shown below. This will give you
dummy certificates, but will help you avoid running afoul of Let's
Encrypt rate limits. Once you know everything works, delete the ACME
state directory (,(file "/var/lib/acme") by default) and run ,(samp
[/usr/bin/acme renew]) again to get real certificates.]
         (prog (source :language scheme
                       :file "doc/snippets/acme-staging-url.scm")
               :line #f))
      (p [If you are running guix-forge in a Guix system container, do
remember to mount the ACME state directory (,(file [/var/lib/acme]) by
default) into the container from persistent storage.])))
  (chapter :title [Services]
           :ident "chapter-services"
    (section :title [Git web viewers]
             :ident "section-git-web-viewers"
      (subsection :title [cgit service]
                  :ident "subsection-cgit-service"
        (p [cgit is a web frontend to serve git repositories on the
web. Our cgit service features]
           (itemize
            (item [clonable URLs via the smart HTTP protocol through
,(command [git-http-backend])])
            (item [syntax highlighting for a wide variety of
programming languages using ,(ref :url "https://pygments.org/" :text
"Pygments")])
            (item [rendering markdown, org mode, reStructuredText, man
page, HTML or plain text README files in the ,(emph [About]) page])
            (item [hiding full email addresses on cgit web pages]))
           [Note that this service is different from the cgit service
of the same name in Guix upstream.])
        (description
         (record-documentation "guix/forge/cgit.scm" '<cgit-configuration>
           (record-field "cgit"
             [,(code [cgit]) package to use])
           (record-field "git"
             [,(code [git]) package to use. ,(code [git]) provides the
smart HTTP protocol backend.])
           (record-field "server-name"
             [Domain name to serve cgit on])
           (record-field "repository-directory"
             [Directory containing git repositories to serve])
           (record-field "socket"
             [Socket that the internal cgit fcgiwrap instance listens on])
           (record-field "readme"
             [README file to serve as the ,(emph [About]) page of the
repository. This field is a list of candidate README files looked up
in the default branch of the repository. cgit will serve the first
file that is found.])
           (record-field "snapshots"
             [List of strings specifying snapshot formats that cgit
generates links for. Valid strings are ,(code ["tar"]), ,(code
["tar.gz"]), ,(code ["tar.bz2"]), ,(code ["tar.lz"]), ,(code
["tar.xz"]), ,(code ["tar.xst"]) and ,(code ["zip"]).])
           (record-field "about-filter"
             [Script invoked to format the content of about pages])
           (record-field "commit-filter"
             [Script invoked to format commit messages])
           (record-field "email-filter"
             [Script invoked to format email addresses])
           (record-field "source-filter"
             [Script invoked to format plaintext blobs in the tree
view])
           (record-field "mimetype-file"
             [File to use for automatic mimetype lookup. This is used
by the plain endpoint when serving blob content])
           (record-field "repository-sort"
             [Order in which repositories are sorted on the index
page. Valid values are ,(code ['name]) (sorting by repository name)
and ,(code ['age]) (sorting most recently updated repository
first).])
           (record-field "plain-email?"
             [If ,(code [#true]), full email addresses will be
shown. Else, they won't.])
           (record-field "extra-options"
             [Association list of additional key-value option pairs to
include in the generated ,(file [cgitrc]) configuration file])))))
    (section :title [forge nginx service]
             :ident "section-forge-nginx-service"
      (p [The forge nginx service is a wrapper around the nginx web
service in Guix upstream. It features]
         (itemize
          (item [automatic HTTPS for all sites through the ,(ref :ident
"section-acme-service" :text "ACME service")])
          (item [HTTP endpoint that redirects to HTTPS and responds to
ACME HTTP-01 challenges])
          (item [automatic provision of ,(ref :url
"https://en.wikipedia.org/wiki/HTTP_Strict_Transport_Security" :text
(abbr :short "HSTS" :long "HTTP Strict Transport Security"))
headers])))
      (p [When using this service, you must allow the ,(samp [acme])
user to restart nginx using ,(command [sudo]). This is so that newly
obtained certificates can be deployed to nginx. You may achieve this
with the following in the ,(code [sudoers-file]) field of your ,(code
[operating-system]) definition.]
         (prog (source :language scheme
                       :file "doc/snippets/acme-restart-nginx-sudoers.scm")
               :line #f))
      (description
       (record-documentation "guix/forge/nginx.scm" '<forge-nginx-configuration>
         (record-field "http-listen"
           [Socket to listen on for HTTP requests. Socket may be a
,(record-ref "<forge-host-socket>"), ,(record-ref
"<forge-ip-socket>"), or ,(record-ref "<forge-unix-socket>") object.])
         (record-field "https-listen"
           [Socket to listen on for HTTPS requests. Socket may be a
,(record-ref "<forge-host-socket>"), ,(record-ref
"<forge-ip-socket>"), or ,(record-ref "<forge-unix-socket>") object.])
         (record-field "acme-state-directory"
           [State directory of the ,(ref :ident "section-acme-service"
:text "ACME service")])
         (record-field "acme-challenge-directory"
           [Directory to serve on ,(samp
[/.well-known/acme-challenge/]) in response to ACME HTTP-01
challenges])
         (record-field "server-blocks"
           [List of ,(ref :url
"https://guix.gnu.org/manual/en/html_node/Web-Services.html#index-nginx_002dserver_002dconfiguration"
:text "<nginx-server-configuration>") objects describing server blocks
to add to the nginx configuration]))))
    (section :title [ACME service]
             :ident "section-acme-service"
      (p [,(abbr :short "ACME" :long "Automatic Certificate Management
Environment") is a protocol popularized by the Let's Encrypt
certificate authority for the automatic issue and renewal of TLS
certificates. The guix-forge ACME service featuers]
         (itemize
          (item [a ,(samp [/usr/bin/acme]) script to help with
certificate management tasks])
          (item [cron job that runs at a random minute during the day and
renews certificates older than 30 days])
          (item [HTTP-01 challenge support. The DNS-01 challenge and
wildcard certificates will be supported in the future.])
          (item [completely rootless operation])))
      (p [The first time the ACME service is set up or each time new
certificates are configured, self-signed certificates are created so
that processes (such as nginx) that depend on these certificates can
start up successfully. You must replace these with certificate
authority issued certificates by running ,(samp [/usr/bin/acme
renew]). ,(samp [/usr/bin/acme renew]) automatically registers an ACME
account unless one already exists and renews all configured
certificates. It uses parameters that were configured in the ACME
service and does not need any additional command-line arguments.])
      (p [The ACME service does not use ,(ref :url
"https://certbot.eff.org/" :text "certbot"), the official Let's
Encrypt client. It instead uses ,(ref :url
"https://github.com/ndilieto/uacme/" :text "uacme"). uacme is smaller,
simpler, manages far less state, does no magic, and is better suited
to automation. However, the choice of backend tool is an
implementation detail. The ACME service is an ,(emph [abstract])
service that is largely independent of the backend tool that powers
it.])
      (p [By using the ACME service, you agree to the Terms of Service
of your ACME server.])
      (description
       (record-documentation "guix/forge/acme.scm" '<acme-configuration>
         (record-field "uacme"
           [,(code [uacme]) package to use])
         (record-field "email"
           [Email ID to register ACME account with])
         (record-field "acme-url"
           [URL of the ACME server to use. This field can be set to
,(code [%letsencrypt-staging-url]) when testing your deployment.])
         (record-field "state-directory"
           [State directory in which private keys and certificates are
stored])
         (record-field "http-01-challenge-directory"
           [Directory served by the web server at ,(samp
"/.well-known/acme-challenge/") in response to ACME HTTP-01
challenges])
         (record-field "http-01-authorization-hook"
           [Script invoked to complete a HTTP-01 challenge])
         (record-field "http-01-cleanup-hook"
           [Script invoked after the completion of a HTTP-01
challenge])
         (record-field "key"
           [,(record-ref "<acme-rsa-key>") or ,(record-ref
"<acme-ecdsa-key>") object describing the ACME account and TLS
certificate keys. Changing this field does not affect keys already
generated and stored on disk.])
         (record-field "certificates"
           [List of ,(record-ref "<acme-certificate>") objects
describing certificates to configure])))
      (p [The ,(code [http-01-authorization-hook]) and ,(code
[http-01-cleanup-hook]) scripts are invoked with the following three
command-line arguments.])
      (description
       (item :key (code [identifier])
             [Primary domain name on the certificate])
       (item :key (code [token])
             [Filename of the resource requested under ,(samp
"/.well-known/acme-challenge/") during the HTTP-01 challenge])
       (item :key (code [auth])
             [Authorization string expected to be at the requested
resource]))
      (description
       (record-documentation "guix/forge/acme.scm" '<acme-certificate>
         (record-field "domains"
           [List of domain names that the certificate is valid
for. Each domain name is a string.])
         (record-field "deploy-hook"
           [Script invoked to deploy a new certificate after
successful renewal. This script is invoked without any command-line
arguments.]))
       (record-documentation "guix/forge/acme.scm" '<acme-rsa-key>
         (record-field "length"
           [Length of the RSA key in number of bits. Must be a multiple
of 8 between 2048 and 8192.]))
       (record-documentation "guix/forge/acme.scm" '<acme-ecdsa-key>
         (record-field "length"
           [Length of the ECDSA key in number of bits. Must be either
256 or 384.]))))
    (section :title [Specialized application deployment services]
             :ident "section-specialized-application-deployment-services"
      (subsection :title [fcgiwrap service]
                  :ident "fcgiwrap-service"
        (p [fcgiwrap is a specialized web server for ,(ref :url
"https://en.wikipedia.org/wiki/Common_Gateway_Interface" :text "CGI")
applications. It provides a ,(ref :url
"https://en.wikipedia.org/wiki/FastCGI" :text "FastCGI") interface
that web servers such as nginx can talk to. We run separate
containerized instances of fcgiwrap for each application.])
        (p [Note that this service is different from the fcgiwrap
service of the same name in Guix upstream.])
        (description
         (record-documentation "guix/forge/fcgiwrap.scm" '<fcgiwrap-configuration>
           (record-field "package"
             [,(code [fcgiwrap]) package to use])
           (record-field "instances"
             [List of ,(record-ref "<fcgiwrap-instance>") objects
describing fcgiwrap instances to run]))
         (record-documentation "guix/forge/fcgiwrap.scm" '<fcgiwrap-instance>
           (record-field "name"
             [Name of the fcgiwrap instance])
           (record-field "socket"
             [Socket the fcgiwrap instance listens on. Socket may be a
,(record-ref "<forge-host-socket>"), ,(record-ref "<forge-ip-socket>")
or ,(record-ref "<forge-unix-socket>") object.])
           (record-field "user"
             [User the fcgiwrap instance should run as])
           (record-field "group"
             [Group the fcgiwrap instance should run as])
           (record-field "processes"
             [Number of fcgiwrap worker processes])
           (record-field "environment-variables"
             [Association list mapping environment variables that
should be set in the execution environment to their values])
           (record-field "mappings"
             [List of ,(code [<file-system-mapping>]) objects
describing additional directories that should be shared with the
container fcgiwrap is run in]))))
      (subsection :title [gunicorn service]
        (p [gunicorn is a specialized web server for Python ,(ref :url
"https://en.wikipedia.org/wiki/Web_Server_Gateway_Interface" :text
"WSGI") applications. We run separate containerized instances of
gunicorn for each application.])
        (description
         (record-documentation "guix/forge/gunicorn.scm" '<gunicorn-configuration>
           (record-field "package"
             [,(code [gunicorn]) package to use])
           (record-field "apps"
             [List of ,(record-ref "<gunicorn-app>") objects describing
gunicorn apps to run]))
         (record-documentation "guix/forge/gunicorn.scm" '<gunicorn-app>
           (record-field "name"
             [Name of the app])
           (record-field "package"
             [Package of the app])
           (record-field "wsgi-app-module"
             [WSGI app module passed to gunicorn])
           (record-field "sockets"
             [List of ,(record-ref "<forge-host-socket>"), ,(record-ref
"<forge-ip-socket>") or ,(record-ref "<forge-unix-socket>") objects
describing sockets to listen on])
           (record-field "workers"
             [Number of worker processes])
           (record-field "environment-variables"
             [Association list mapping environment variables that should
be set in the execution environment to their values])
           (record-field "mappings"
             [List of ,(code [<file-system-mapping>]) objects describing
additional directories that should be shared with the container
gunicorn is run in]))))))
  (chapter :title [Reference]
           :ident "chapter-reference"
    (description
     (record-documentation "guix/forge/forge.scm" '<forge-configuration>
       (record-field "projects"
         [List of ,(record-ref "<forge-project>") objects describing
projects managed by guix-forge]))
     (record-documentation "guix/forge/forge.scm" '<forge-project>
       (record-field "name"
         [Name of the project])
       (record-field "repository"
         [Path to a local git repository, or URI to a remote git
repository])
       (record-field "user"
         [User who owns the repository if it is local. This field is
disregarded if the repository is remote.])
       (record-field "description"
         [Short one-line description of the project. It is used to set
the ,(file "description") file in the repository and will appear in
the cgit web interface.])
       (record-field "website-directory"
         [Path to the document root of the project website. The
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 "ci-jobs"
         [List of ,(record-ref "<forge-laminar-job>") objects
describing ,(abbr :short "CI" :long "continuous integration") jobs to
configure])
       (record-field "ci-jobs-trigger"
         [One of ,(code ['post-receive-hook]), ,(code ['webhook]), or
,(code ['cron]) representing the type of trigger for continuous
integration jobs.
,(description
  (item :key (code ['post-receive-hook])
        [If ,(code ['post-receive-hook]) is specified, the ,(file
"post-receive") hook of the repository is configured to trigger CI
jobs. This is possible only for local repositories. Note that any
pre-existing ,(file "post-receive") hook is overwritten.])
  (item :key (code ['webhook]) [If ,(code
['webhook]) is specified, a webhook server is configured to trigger CI
jobs when a request is received on ,(samp "http://hostname:port/hooks/<name>") \.])
  (item :key (code ['cron]) [If ,(code ['cron]) is
specified, a cron job triggers the CI jobs once a day.]))]
         :default [,(code ['post-receive-hook]) for local repositories
and ,(code ['cron]) for remote repositories])
       (record-field "repository-branch"
         [Main branch of the repository. This field is currently
unused unused, and may be deprecated in the future.]))
     (record-documentation "guix/forge/laminar.scm" '<forge-laminar-job>
       (record-field "name"
         [Name of the job])
       (record-field "run"
         [G-expression to be run])
       (record-field "after"
         [G-expression to be run after the main job script])
       (record-field "trigger?"
         [If ,(code [#t]), this job is run on every commit. Else, it
must be manually set up to run some other way.]))
     (record-documentation "guix/forge/socket.scm" '<forge-host-socket>
       (record-field "hostname"
         [Name of the host])
       (record-field "port"
         [Port number]))
     (record-documentation "guix/forge/socket.scm" '<forge-ip-socket>
       (record-field "ip"
         [IP address, either IPv4 or IPv6, as a string. The loopback
address is ,(code ["127.0.0.1"]) and ,(code ["::1"]) for IPv4 and IPv6
respectively. The any address is ,(code ["0.0.0.0"]) and ,(code
["::"]) for IPv4 and IPv6 respectively.])
       (record-field "port"
         [Port number to listen on.]))
     (record-documentation "guix/forge/socket.scm" '<forge-unix-socket>
       (record-field "path"
         [Path to socket file.]))
     (record-documentation "guix/forge/webhook.scm" '<webhook-configuration>
       (record-field "package"
         [,(code [webhook]) package to use])
       (record-field "socket"
         [Socket, a ,(record-ref "<forge-ip-socket>") object, to listen
on.])
       (record-field "log-directory"
         [Directory to write log files to])
       (record-field "hooks"
         [List of ,(record-ref "<webhook-hook>") objects describing
hooks to configure]))
     (record-documentation "guix/forge/webhook.scm" '<webhook-hook>
       (record-field "id"
         [Identifier of the webhook. This hook is triggered at ,(ref
:url [http://host:port/hooks/<id>]).])
       (record-field "run"
         [G-expression to run when the webhook is triggered]))
     (docstring-function-documentation "guix/forge/klaus.scm" 'klaus-gunicorn-app))))