378 lines
14 KiB
Scheme
378 lines
14 KiB
Scheme
;;; GNU Guix --- Functional package management for GNU
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;;; Copyright © 2016 Nils Gillmann <ng0@n0.is>
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;;; Copyright © 2016 Sou Bunnbu <iyzsong@member.fsf.org>
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;;; Copyright © 2017 Oleg Pykhalov <go.wigust@gmail.com>
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;;; Copyright © 2017 Clément Lassieur <clement@lassieur.org>
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;;; Copyright © 2018 Christopher Baines <mail@cbaines.net>
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;;;
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;;; This file is part of GNU Guix.
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;;;
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;;; GNU Guix is free software; you can redistribute it and/or modify it
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;;; under the terms of the GNU General Public License as published by
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;;; the Free Software Foundation; either version 3 of the License, or (at
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;;; your option) any later version.
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;;;
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;;; GNU Guix is distributed in the hope that it will be useful, but
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;;; WITHOUT ANY WARRANTY; without even the implied warranty of
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;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;;; GNU General Public License for more details.
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;;;
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;;; You should have received a copy of the GNU General Public License
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;;; along with GNU Guix. If not, see <http://www.gnu.org/licenses/>.
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(define-module (gnu services version-control)
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#:use-module (gnu services)
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#:use-module (gnu services base)
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#:use-module (gnu services shepherd)
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#:use-module (gnu services web)
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#:use-module (gnu system shadow)
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#:use-module (gnu packages version-control)
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#:use-module (gnu packages admin)
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#:use-module (guix records)
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#:use-module (guix gexp)
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#:use-module (guix store)
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#:use-module (srfi srfi-1)
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#:use-module (srfi srfi-26)
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#:use-module (ice-9 format)
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#:use-module (ice-9 match)
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#:export (git-daemon-service
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git-daemon-service-type
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git-daemon-configuration
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git-daemon-configuration?
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git-http-configuration
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git-http-configuration?
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git-http-nginx-location-configuration
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<gitolite-configuration>
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gitolite-configuration
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gitolite-configuration-package
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gitolite-configuration-user
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gitolite-configuration-rc-file
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gitolite-configuration-admin-pubkey
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<gitolite-rc-file>
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gitolite-rc-file
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gitolite-rc-file-umask
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gitolite-rc-file-git-config-keys
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gitolite-rc-file-roles
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gitolite-rc-file-enable
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gitolite-service-type))
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;;; Commentary:
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;;;
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;;; Version Control related services.
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;;;
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;;; Code:
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;;;
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;;; Git daemon.
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;;;
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(define-record-type* <git-daemon-configuration>
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git-daemon-configuration
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make-git-daemon-configuration
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git-daemon-configuration?
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(package git-daemon-configuration-package ;package
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(default git))
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(export-all? git-daemon-configuration-export-all ;boolean
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(default #f))
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(base-path git-daemon-configuration-base-path ;string | #f
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(default "/srv/git"))
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(user-path git-daemon-configuration-user-path ;string | #f
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(default #f))
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(listen git-daemon-configuration-listen ;list of string
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(default '()))
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(port git-daemon-configuration-port ;number | #f
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(default #f))
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(whitelist git-daemon-configuration-whitelist ;list of string
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(default '()))
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(extra-options git-daemon-configuration-extra-options ;list of string
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(default '())))
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(define git-daemon-shepherd-service
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(match-lambda
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(($ <git-daemon-configuration>
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package export-all? base-path user-path
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listen port whitelist extra-options)
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(let* ((git (file-append package "/bin/git"))
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(command `(,git
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"daemon" "--syslog" "--reuseaddr"
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,@(if export-all?
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'("--export-all")
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'())
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,@(if base-path
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`(,(string-append "--base-path=" base-path))
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'())
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,@(if user-path
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`(,(string-append "--user-path=" user-path))
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'())
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,@(map (cut string-append "--listen=" <>) listen)
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,@(if port
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`(,(string-append
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"--port=" (number->string port)))
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'())
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,@extra-options
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,@whitelist)))
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(list (shepherd-service
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(documentation "Run the git-daemon.")
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(requirement '(networking))
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(provision '(git-daemon))
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(start #~(make-forkexec-constructor '#$command
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#:user "git-daemon"
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#:group "git-daemon"))
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(stop #~(make-kill-destructor))))))))
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(define %git-daemon-accounts
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;; User account and group for git-daemon.
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(list (user-group
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(name "git-daemon")
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(system? #t))
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(user-account
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(name "git-daemon")
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(system? #t)
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(group "git-daemon")
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(comment "Git daemon user")
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(home-directory "/var/empty")
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(shell (file-append shadow "/sbin/nologin")))))
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(define (git-daemon-activation config)
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"Return the activation gexp for git-daemon using CONFIG."
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(let ((base-path (git-daemon-configuration-base-path config)))
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#~(begin
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(use-modules (guix build utils))
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;; Create the 'base-path' directory when it's not '#f'.
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(and=> #$base-path mkdir-p))))
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(define git-daemon-service-type
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(service-type
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(name 'git-daemon)
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(extensions
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(list (service-extension shepherd-root-service-type
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git-daemon-shepherd-service)
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(service-extension account-service-type
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(const %git-daemon-accounts))
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(service-extension activation-service-type
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git-daemon-activation)))
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(description
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"Expose Git respositories over the insecure @code{git://} TCP-based
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protocol.")
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(default-value (git-daemon-configuration))))
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(define* (git-daemon-service #:key (config (git-daemon-configuration)))
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"Return a service that runs @command{git daemon}, a simple TCP server to
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expose repositories over the Git protocol for annoymous access.
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The optional @var{config} argument should be a
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@code{<git-daemon-configuration>} object, by default it allows read-only
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access to exported repositories under @file{/srv/git}."
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(service git-daemon-service-type config))
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;;;
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;;; HTTP access. Add the result of calling
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;;; git-http-nginx-location-configuration to an nginx-server-configuration's
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;;; "locations" field.
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;;;
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(define-record-type* <git-http-configuration>
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git-http-configuration
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make-git-http-configuration
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git-http-configuration?
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(package git-http-configuration-package ;package
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(default git))
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(git-root git-http-configuration-git-root ;string
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(default "/srv/git"))
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(export-all? git-http-configuration-export-all? ;boolean
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(default #f))
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(uri-path git-http-configuration-uri-path ;string
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(default "/git/"))
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(fcgiwrap-socket git-http-configuration-fcgiwrap-socket ;string
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(default "127.0.0.1:9000")))
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(define* (git-http-nginx-location-configuration #:optional
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(config
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(git-http-configuration)))
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(match config
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(($ <git-http-configuration> package git-root export-all?
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uri-path fcgiwrap-socket)
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(nginx-location-configuration
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(uri (string-append "~ /" (string-trim-both uri-path #\/) "(/.*)"))
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(body
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(list
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(list "fastcgi_pass " fcgiwrap-socket ";")
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(list "fastcgi_param SCRIPT_FILENAME "
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package "/libexec/git-core/git-http-backend"
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";")
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"fastcgi_param QUERY_STRING $query_string;"
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"fastcgi_param REQUEST_METHOD $request_method;"
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"fastcgi_param CONTENT_TYPE $content_type;"
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"fastcgi_param CONTENT_LENGTH $content_length;"
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(if export-all?
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"fastcgi_param GIT_HTTP_EXPORT_ALL \"\";"
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"")
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(list "fastcgi_param GIT_PROJECT_ROOT " git-root ";")
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"fastcgi_param PATH_INFO $1;"))))))
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;;;
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;;; Gitolite
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;;;
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(define-record-type* <gitolite-rc-file>
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gitolite-rc-file make-gitolite-rc-file
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gitolite-rc-file?
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(umask gitolite-rc-file-umask
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(default #o0077))
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(git-config-keys gitolite-rc-file-git-config-keys
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(default ""))
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(roles gitolite-rc-file-roles
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(default '(("READERS" . 1)
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("WRITERS" . 1))))
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(enable gitolite-rc-file-enable
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(default '("help"
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"desc"
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"info"
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"perms"
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"writable"
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"ssh-authkeys"
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"git-config"
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"daemon"
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"gitweb"))))
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(define-gexp-compiler (gitolite-rc-file-compiler
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(file <gitolite-rc-file>) system target)
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(match file
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(($ <gitolite-rc-file> umask git-config-keys roles enable)
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(apply text-file* "gitolite.rc"
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`("%RC = (\n"
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" UMASK => " ,(format #f "~4,'0o" umask) ",\n"
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" GIT_CONFIG_KEYS => '" ,git-config-keys "',\n"
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" ROLES => {\n"
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,@(map (match-lambda
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((role . value)
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(simple-format #f " ~A => ~A,\n" role value)))
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roles)
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" },\n"
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"\n"
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" ENABLE => [\n"
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,@(map (lambda (value)
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(simple-format #f " '~A',\n" value))
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enable)
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" ],\n"
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");\n"
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"\n"
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"1;\n")))))
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(define-record-type* <gitolite-configuration>
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gitolite-configuration make-gitolite-configuration
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gitolite-configuration?
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(package gitolite-configuration-package
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(default gitolite))
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(user gitolite-configuration-user
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(default "git"))
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(group gitolite-configuration-group
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(default "git"))
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(home-directory gitolite-configuration-home-directory
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(default "/var/lib/gitolite"))
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(rc-file gitolite-configuration-rc-file
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(default (gitolite-rc-file)))
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(admin-pubkey gitolite-configuration-admin-pubkey))
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(define gitolite-accounts
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(match-lambda
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(($ <gitolite-configuration> package user group home-directory
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rc-file admin-pubkey)
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;; User group and account to run Gitolite.
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(list (user-group (name user) (system? #t))
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(user-account
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(name user)
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(group group)
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(system? #t)
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(comment "Gitolite user")
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(home-directory home-directory))))))
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(define gitolite-activation
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(match-lambda
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(($ <gitolite-configuration> package user group home
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rc-file admin-pubkey)
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#~(begin
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(use-modules (ice-9 match)
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(guix build utils))
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(let* ((user-info (getpwnam #$user))
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(admin-pubkey #$admin-pubkey)
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(pubkey-file (string-append
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#$home "/"
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(basename
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(strip-store-file-name admin-pubkey)))))
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(simple-format #t "guix: gitolite: installing ~A\n" #$rc-file)
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(copy-file #$rc-file #$(string-append home "/.gitolite.rc"))
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;; The key must be writable, so copy it from the store
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(copy-file admin-pubkey pubkey-file)
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(chmod pubkey-file #o500)
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(chown pubkey-file
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(passwd:uid user-info)
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(passwd:gid user-info))
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;; Set the git configuration, to avoid gitolite trying to use
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;; the hostname command, as the network might not be up yet
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(with-output-to-file #$(string-append home "/.gitconfig")
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(lambda ()
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(display "[user]
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name = GNU Guix
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email = guix@localhost
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")))
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;; Run Gitolite setup, as this updates the hooks and include the
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;; admin pubkey if specified. The admin pubkey is required for
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;; initial setup, and will replace the previous key if run after
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;; initial setup
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(match (primitive-fork)
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(0
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;; Exit with a non-zero status code if an exception is thrown.
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(dynamic-wind
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(const #t)
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(lambda ()
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(setenv "HOME" (passwd:dir user-info))
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(setenv "USER" #$user)
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(setgid (passwd:gid user-info))
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(setuid (passwd:uid user-info))
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(primitive-exit
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(system* #$(file-append package "/bin/gitolite")
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"setup"
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"-m" "gitolite setup by GNU Guix"
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"-pk" pubkey-file)))
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(lambda ()
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(primitive-exit 1))))
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(pid (waitpid pid)))
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(when (file-exists? pubkey-file)
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(delete-file pubkey-file)))))))
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(define gitolite-service-type
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(service-type
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(name 'gitolite)
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(extensions
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(list (service-extension activation-service-type
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gitolite-activation)
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(service-extension account-service-type
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gitolite-accounts)
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(service-extension profile-service-type
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;; The Gitolite package in Guix uses
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;; gitolite-shell in the authorized_keys file, so
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;; gitolite-shell needs to be on the PATH for
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;; gitolite to work.
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(lambda (config)
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(list
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(gitolite-configuration-package config))))))
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(description
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"Setup @command{gitolite}, a Git hosting tool providing access over SSH..
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By default, the @code{git} user is used, but this is configurable.
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Additionally, Gitolite can integrate with with tools like gitweb or cgit to
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provide a web interface to view selected repositories.")))
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