gnu: Add nncp.

* gnu/packages/uucp.scm (nncp): New variable.

gnu/packages/uucp.scm

@@ -1,5 +1,6 @@
 ;;; GNU Guix --- Functional package management for GNU
 ;;; Copyright © 2014 Ludovic Courtès <ludo@gnu.org>
+;;; Copyright © 2021 Arun Isaac <arunisaac@systemreboot.net>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -17,10 +18,13 @@
 ;;; along with GNU Guix.  If not, see <http://www.gnu.org/licenses/>.
 
 (define-module (gnu packages uucp)
+  #:use-module (gnu packages golang)
+  #:use-module (gnu packages texinfo)
   #:use-module (guix licenses)
   #:use-module (guix packages)
   #:use-module (guix download)
-  #:use-module (guix build-system gnu))
+  #:use-module (guix build-system gnu)
+  #:use-module (guix build-system go))
 
 (define-public uucp
   (package
@@ -54,3 +58,115 @@
 set of utilities for remotely transferring files, email and net news
 between computers.")
     (license gpl2+)))
+
+(define-public nncp
+  (package
+    (name "nncp")
+    (version "7.5.0")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (string-append "http://www.nncpgo.org/download/nncp-"
+                           version ".tar.xz"))
+       (sha256
+        (base32
+         "1r1zgj7gpkdmdm3wf31m0xi8y313kzd4dbyp4r4y8khnp32jvn8l"))
+       (modules '((ice-9 ftw)
+                  (guix build utils)))
+       (snippet
+        '(begin
+           ;; Unbundle dependencies.
+           ;; TODO: go.cypherpunks.ru was down at the time of
+           ;; packaging. Unbundle go.cypherpunks dependencies as well once it
+           ;; comes back online.
+           (for-each (lambda (file)
+                       (unless (member file (list "." ".." "go.cypherpunks.ru"))
+                         (delete-file-recursively (string-append "src/vendor/" file))))
+                     (scandir "src/vendor"))
+           ;; Delete built documentation.
+           (delete-file "doc/nncp.info")
+           #t))))
+    (build-system gnu-build-system)
+    (arguments
+     `(#:modules ((guix build gnu-build-system)
+                  ((guix build go-build-system) #:prefix go:)
+                  (guix build utils))
+       #:imported-modules ,%go-build-system-modules
+       #:phases
+       (modify-phases %standard-phases
+         (add-before 'unpack 'setup-go-environment
+           (assoc-ref go:%standard-phases 'setup-go-environment))
+         (add-after 'unpack 'go-unpack
+           (lambda* (#:key source #:allow-other-keys)
+             ;; Copy source to GOPATH.
+             (copy-recursively "src" "../src/go.cypherpunks.ru/nncp/v7")
+             ;; Move bundled dependencies to GOPATH.
+             (for-each (lambda (dependency)
+                         (rename-file (string-append "src/vendor/go.cypherpunks.ru/"
+                                                     dependency)
+                                      (string-append "../src/go.cypherpunks.ru/"
+                                                     dependency)))
+                       (list "balloon" "recfile"))
+             ;; Delete empty bundled dependencies directory.
+             (delete-file-recursively "src/vendor")))
+         (replace 'configure
+           (lambda* (#:key outputs #:allow-other-keys)
+             (let ((out (assoc-ref outputs "out")))
+               ;; Set configuration path.
+               (setenv "CFGPATH" "/etc/nncp.hjson")
+               ;; Set output directories.
+               (setenv "BINDIR" (string-append out "/bin"))
+               (setenv "INFODIR" (string-append out "/share/info"))
+               (setenv "DOCDIR" (string-append out "/share/doc/nncp")))
+             ;; Set absolute store paths to sh and cat.
+             (substitute* (list "src/pipe.go" "src/toss_test.go")
+               (("/bin/sh") (which "sh")))
+             (substitute* "src/toss_test.go"
+               (("; cat") (string-append "; " (which "cat"))))
+             ;; Remove module flags.
+             (substitute* (list "bin/default.do" "bin/hjson-cli.do" "test.do")
+               ((" -mod=vendor") "")
+               ((" -m") ""))
+             ;; Use the correct module path. `go list` does not report the
+             ;; correct module path since we have moved the source files.
+             (substitute* "bin/default.do"
+               (("^mod=[^\n]*" all) "mod=go.cypherpunks.ru/nncp/v7"))
+             ;; Disable timeout in tests. Tests can take longer than the
+             ;; default timeout on spinning disks.
+             (substitute* "test.do"
+               (("test") "test -timeout 0"))))
+         (replace 'check
+           (lambda* (#:key tests? #:allow-other-keys)
+             (when tests?
+               (invoke "contrib/do" "-c" "test"))))
+         (add-after 'install 'remove-go-references
+           (assoc-ref go:%standard-phases 'remove-go-references)))))
+    (inputs
+     `(("go-github-com-davecgh-go-xdr" ,go-github-com-davecgh-go-xdr)
+       ("go-github-com-dustin-go-humanize" ,go-github-com-dustin-go-humanize)
+       ("go-github-com-flynn-noise" ,go-github-com-flynn-noise)
+       ("go-github-com-gorhill-cronexpr" ,go-github-com-gorhill-cronexpr)
+       ("go-github-com-hjson-hjson-go" ,go-github-com-hjson-hjson-go)
+       ("go-github-com-klauspost-compress" ,go-github-com-klauspost-compress)
+       ("go-golang-org-x-crypto" ,go-golang-org-x-crypto)
+       ("go-golang-org-x-net" ,go-golang-org-x-net)
+       ("go-golang-org-x-term" ,go-golang-org-x-term)
+       ("go-lukechampine-com-blake3" ,go-lukechampine-com-blake3)))
+    (native-inputs
+     `(("go" ,go)
+       ("texinfo" ,texinfo)))
+    (home-page "http://www.nncpgo.org/")
+    (synopsis "Store and forward utilities")
+    (description "NNCP (Node to Node copy) is a collection of utilities
+simplifying secure store-and-forward files, mail and command exchanging.
+These utilities are intended to help build up small size (dozens of nodes)
+ad-hoc friend-to-friend (F2F) statically routed darknet delay-tolerant
+networks for fire-and-forget secure reliable files, file requests, Internet
+mail and commands transmission.  All packets are integrity checked, end-to-end
+encrypted, explicitly authenticated by known participants public keys.  Onion
+encryption is applied to relayed packets.  Each node acts both as a client and
+server, can use push and poll behaviour model.  Multicasting areas, offline
+sneakernet/floppynet, dead drops, sequential and append-only CD-ROM/tape
+storages, air-gapped computers and online TCP daemon with full-duplex
+resumable data transmission exists are all supported.")
+    (license gpl3)))