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;;; Consfigurator -- Lisp declarative configuration management system
;;; Copyright (C) 2021 Sean Whitton <spwhitton@spwhitton.name>
;;; This file 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, or (at your option)
;;; any later version.
;;; This file 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 this program. If not, see <http://www.gnu.org/licenses/>.
(in-package :consfigurator.property.git)
(named-readtables:in-readtable :consfigurator)
(defproplist installed :posix ()
"Ensures that git(1) is installed."
(:desc "Git installed")
(os:etypecase
(debianlike (apt:installed "git"))))
(defprop snapshot-extracted :posix
(directory snapshot-name
&key replace
&aux (dest
(merge-pathnames snapshot-name
(ensure-directory-pathname directory))))
"Extract a tarball as produced by DATA:GIT-SNAPSHOT under DIRECTORY.
If REPLACE, delete and replace the snapshot (or anything else) that already
exists at DIRECTORY/SNAPSHOT-NAME. This is useful to ensure the latest
available version of the snapshot is present on the remote system."
;; TODO Keyword argument to replace only if a newer version of the
;; prerequisite data is available.
(:desc (declare (ignore replace dest))
#?"git snapshot ${snapshot-name} extracted")
(:hostattrs (declare (ignore replace dest))
(require-data "--git-snapshot" snapshot-name))
(:check (and (not replace) (remote-exists-p dest)))
(:apply
(declare (ignore replace))
(delete-remote-trees dest)
(file:directory-exists directory)
(with-remote-current-directory (directory)
(mrun :input (get-data-stream "--git-snapshot" snapshot-name)
"tar" (if (zerop (get-connattr :remote-uid)) "oxfz" "xfz") "-")))
(:unapply
(declare (ignore replace))
(delete-remote-trees dest)))
(defprop %cloned :posix (url dest branch
&aux (dest (ensure-directory-pathname dest)))
(:check
(declare (ignore branch))
(let ((config (merge-pathnames ".git/config" dest)))
(and (remote-exists-p config)
(string= url (car (runlines "git" "config" "--file" config
"remote.origin.url"))))))
(:apply
(delete-remote-trees dest)
(file:containing-directory-exists dest)
(run "git" "clone" url dest)
(with-remote-current-directory (dest)
(when branch
(mrun "git" "checkout" branch))
;; Do this in case this repo is to be served via HTTP, though note that
;; we don't set up the hook to do this upon update here.
(mrun "git" "update-server-info"))))
(defproplist cloned :posix (url dest &optional branch)
"Clone git repo available at URL to DEST.
If the directory already exists and contains anything but a git repo cloned
from URL, recursively delete it first. If BRANCH, check out that branch."
(:desc #?"${url} cloned to ${dest}")
(installed)
(%cloned url dest branch))
(defprop %pulled :posix (dest &aux (dest (ensure-directory-pathname dest)))
(:apply
(with-change-if-changes-file-content
((merge-pathnames ".git/FETCH_HEAD" dest))
(with-remote-current-directory (dest)
(mrun "git" "pull")
(mrun "git" "update-server-info")))))
(defproplist pulled :posix (url dest &optional branch)
"Like GIT:CLONED, but also 'git pull' each time this property is applied."
(:desc #?"${url} pulled to ${dest}")
(installed)
(%cloned url dest branch)
(%pulled dest))
(defprop repo-configured :posix (repo &rest pairs)
(:desc
(format nil "git repo at ~S has configuration ~{~A=~A~^, ~}" repo pairs))
(:check (loop for (k v) on pairs by #'cddr
always (string= v (stripln
(run :may-fail "git" "-C" repo "config" k)))))
(:apply (loop for (k v) on pairs by #'cddr
do (mrun "git" "-C" repo "config" k v))))
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