;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2021 Timmy Douglas <mail@timmydouglas.com>
;;;
;;; This file is part of GNU Guix.
;;;
;;; GNU Guix 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.
;;;
;;; GNU Guix 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 GNU Guix.  If not, see <http://www.gnu.org/licenses/>.

(define-module (gnu packages containers)
  #:use-module ((guix licenses) #:prefix license:)
  #:use-module (gnu packages)
  #:use-module (guix packages)
  #:use-module (guix download)
  #:use-module (guix git-download)
  #:use-module (guix build-system gnu)
  #:use-module (guix build-system go)
  #:use-module (guix build-system meson)
  #:use-module (guix utils)
  #:use-module (gnu packages autotools)
  #:use-module (gnu packages base)
  #:use-module (gnu packages check)
  #:use-module (gnu packages compression)
  #:use-module (gnu packages glib)
  #:use-module (gnu packages gnupg)
  #:use-module (gnu packages golang)
  #:use-module (gnu packages linux)
  #:use-module (gnu packages python)
  #:use-module (gnu packages networking)
  #:use-module (gnu packages pkg-config)
  #:use-module (gnu packages selinux)
  #:use-module (gnu packages version-control)
  #:use-module (gnu packages virtualization)
  #:use-module (gnu packages web))

;; For podman to work, the user needs to run
;; `sudo mount -t cgroup2 none /sys/fs/cgroup`

(define-public crun
  (package
    (name "crun")
    (version "1.3")
    (source
     (origin
       (method git-fetch)
       (uri (git-reference
             (url "https://github.com/containers/crun")
             (commit "8e5757a4e68590326dafe8a8b1b4a584b10a1370") ; 1.3
             (recursive? #t)))
       (sha256
        (base32 "01yiss2d57kwlxb7zlqzjwlg9fyaf19yjngd1mw9n4hxls3dfj3k"))
       (file-name (git-file-name name version))))
    
    (build-system gnu-build-system)
    (arguments
     '(#:tests? #f
                #:configure-flags '("--disable-systemd")
                #:phases
                (modify-phases %standard-phases
                  (add-after 'unpack 'do-not-depend-on-git
                    (lambda _
                      (substitute* "autogen.sh"
                        (("^git submodule update.*")
                         ""))
                      (with-output-to-file "git-version.h"
                        (lambda ()
                          (display (string-append
                                    "/* autogenerated.  */\n#ifndef GIT_VERSION\n# define GIT_VERSION \""
                                    "8e5757a4e68590326dafe8a8b1b4a584b10a1370" ; refactor this
                                    "\"\n#endif\n"))))
                      #t
                      )))))
    (inputs
     `(("libcap" ,libcap)
       ("libseccomp" ,libseccomp)
       ("libyajl" ,libyajl)))
    (native-inputs
     `(("automake" ,automake)
       ("autoreconf" ,autoconf)
       ("git" ,git)
       ("libtool" ,libtool)
       ("pkg-config" ,pkg-config)
       ("python-3" ,python-3)))
    (home-page "https://github.com/containers/crun")
    (synopsis "OCI Container runtime")
    (description
     "crun is a fast and low-memory footprint OCI Container Runtime fully written in C.")
    (license license:gpl2+)))

(define-public conmon
  (package
    (name "conmon")
    (version "v2.0.30")
    (source
     (origin
       (method git-fetch)
       (uri (git-reference
             (url "https://github.com/containers/conmon")
             (commit version)))
       (sha256
        (base32 "1sxpbm01g4xak4kqwvk45gmzr6n9bjzlfp1j85wyz8rj2hg2x4rm"))
       (file-name (git-file-name name version))))
    
    (build-system gnu-build-system)
    (arguments
     `(#:make-flags (list ,(string-append "CC=" (cc-for-target))
                          (string-append "PREFIX=" %output))
                    #:tests? #f ; currently broken as go tries to use network
                    #:phases (modify-phases %standard-phases
                               (delete 'configure)
                               (add-after 'unpack 'set-env
                                 (lambda* (#:key inputs #:allow-other-keys)
                                   ;; when running go, things fail because
                                   ;; HOME=/homeless-shelter.
                                   (setenv "HOME" "/tmp")))
                               (replace 'check
                                 (lambda* (#:key tests? #:allow-other-keys)
                                   (when tests?
                                     (invoke "make" "test")))))))
    (inputs
     `(("glib" ,glib)
       ("glibc" ,glibc)
       ("libseccomp" ,libseccomp)
       ("crun" ,crun)))
    (native-inputs
     `(("git" ,git)
       ("go" ,go)
       ("pkg-config" ,pkg-config)))
    (home-page "https://github.com/containers/conmon")
    (synopsis "Monitoring and communication tool between container manager and OCI runtime")
    (description
     "Conmon is a monitoring program and communication tool between a container
manager (like Podman or CRI-O) and an OCI runtime (like runc or crun) for a
single container.")
    (license license:asl2.0)))

(define-public libslirp
  (package
    (name "libslirp")
    (version "v4.6.1")
    (source
     (origin
       (method git-fetch)
       (uri (git-reference
             (url "https://gitlab.freedesktop.org/slirp/libslirp")
             (commit version)))
       (sha256
        (base32 "1b4cn51xvzbrxd63g6w1033prvbxfxsnsn1l0fa5i311xv28vkh0"))
       (file-name (git-file-name name version))))
    
    (build-system meson-build-system)
    (arguments '(#:tests? #f))
    (inputs
     `(("glib" ,glib)))
    (native-inputs
     `(("pkg-config" ,pkg-config)))
    (home-page "https://gitlab.freedesktop.org/slirp/libslirp")
    (synopsis "User-mode networking library")
    (description
     "libslirp is a user-mode networking library used by virtual machines,
containers or various tools.")
    (license license:non-copyleft))) ;fixme what is this?

(define-public slirp4netns
  (package
    (name "slirp4netns")
    (version "v1.1.12")
    (source
     (origin
       (method git-fetch)
       (uri (git-reference
             (url "https://github.com/rootless-containers/slirp4netns")
             (commit version)))
       (sha256
        (base32 "03llv4dlf7qqxwz4zdyk926g4bigfj2gb50glm70ciflpvzs8081"))
       (file-name (git-file-name name version))))
    
    (build-system gnu-build-system)
    (arguments '(#:tests? #f))
    (inputs
     `(("glib" ,glib)
       ("libcap" ,libcap)
       ("libseccomp" ,libseccomp)
       ("libslirp" ,libslirp)))
    (native-inputs
     `(("automake" ,automake)
       ("autoreconf" ,autoconf)
       ("pkg-config" ,pkg-config)))
    (home-page "https://github.com/rootless-containers/slirp4netns")
    (synopsis "User-mode networking for unprivileged network namespaces")
    (description
     "slirp4netns provides user-mode networking (\"slirp\") for unprivileged network namespaces.")
    (license license:gpl2+)))

(define-public cni-plugins
  (package
    (name "cni-plugins")
    (version "v1.0.1")
    (source
     (origin
       (method git-fetch)
       (uri (git-reference
             (url "https://github.com/containernetworking/plugins")
             (commit version)))
       (sha256
        (base32 "1j91in0mg4nblpdccyq63ncbnn2pc2zzjp1fh3jy0bsndllgv0nc"))
       (file-name (git-file-name name version))))
    
    (build-system go-build-system)
    (arguments
     `(#:unpack-path "github.com/containernetworking/plugins"
                     #:tests? #f
                     #:phases (modify-phases %standard-phases
                                (replace 'build
                                  (lambda _
                                    (with-directory-excursion "src/github.com/containernetworking/plugins"
                                      (invoke "./build_linux.sh"))))
                                (replace 'install
                                  (lambda* (#:key outputs #:allow-other-keys)
                                    (copy-recursively "src/github.com/containernetworking/plugins/bin"
                                                      (string-append (assoc-ref outputs "out") "/bin"))
                                    #t)))))
    (home-page "https://github.com/containernetworking/plugins")
    (synopsis "CNI network plugins")
    (description
     "Some CNI network plugins, maintained by the containernetworking team.")
    (license license:asl2.0)))

(define-public podman
  (package
    (name "podman")
    (version "v3.4.2")
    (source
     (origin
       (method git-fetch)
       (uri (git-reference
             (url "https://github.com/containers/podman")
             (commit version)))
       (sha256
        (base32 "0v1xpd1q6ym9ibaj6242v4mp0wwdmj4dd9l7zfyydbxrx6a8ahjn"))
       (file-name (git-file-name name version))))
    
    (build-system gnu-build-system)
    (arguments
     `(#:make-flags (list ,(string-append "CC=" (cc-for-target))
                          (string-append "PREFIX=" %output))
                    #:tests? #f ; need to setup ginkgo
                    #:phases (modify-phases %standard-phases
                               (delete 'configure)
                               (add-after 'unpack 'set-env
                                 (lambda* (#:key inputs #:allow-other-keys)
                                   ;; when running go, things fail because
                                   ;; HOME=/homeless-shelter.
                                   (setenv "HOME" "/tmp")))
                               (add-after 'unpack 'fix-hardcoded-paths
                                 (lambda _
                                   (substitute* (find-files "libpod" "\\.go")
                                     (("exec.LookPath[(][\"]slirp4netns[\"][)]")
                                      (string-append "exec.LookPath(\"" (which "slirp4netns") "\")")))
                                   (substitute* "vendor/github.com/containers/common/pkg/config/config_linux.go"
                                     (("/usr/local/libexec/podman")
                                      (string-append (assoc-ref %outputs "out") "/bin")))
                                   (substitute* "vendor/github.com/containers/common/pkg/config/default.go"
                                     (("/usr/libexec/podman/conmon") (which "conmon"))
                                     (("/usr/local/libexec/cni")
                                      (string-append (assoc-ref %build-inputs "cni-plugins") "/bin"))
                                     (("/usr/bin/crun") (which "crun")))
                                   #true))
                               (replace 'check
                                 (lambda* (#:key tests? #:allow-other-keys)
                                   (when tests?
                                     (invoke "make" "test")))))))
    (inputs
     `(("btrfs-progs" ,btrfs-progs)
       ("cni-plugins" ,cni-plugins)
       ("conmon" ,conmon)
       ("gpgme" ,gpgme)
       ("go-md2man" ,go-github-com-go-md2man)
       ("iptables" ,iptables) ; fixme not sure if podman will call this using $PATH
       ("libassuan" ,libassuan)
       ("libseccomp" ,libseccomp)
       ("libselinux" ,libselinux)
       ("slirp4netns" ,slirp4netns)
       ("crun" ,crun)))
    (native-inputs
     `(("git" ,git)
       ("go" ,go)
       ("pkg-config" ,pkg-config)))
    (home-page "https://podman.io")
    (synopsis "Manage containers, images, pods, and their volumes")
    (description
     "Podman (the POD MANager) is a tool for managing containers and images,
volumes mounted into those containers, and pods made from groups of
containers.")
    (license license:asl2.0)))