[bug#57722] [PATCH] gnu: ipfs: Install bash completion.

[Michael Rohleder <mike@rohleder.de>]

* gnu/packages/ipfs.scm (ipfs)[arguments]: Add 'install-bashcompletion
phase to install bash completion.
---
 gnu/packages/ipfs.scm | 23 +++++++++++++++++++++--
 1 file changed, 21 insertions(+), 2 deletions(-)

diff --git a/gnu/packages/ipfs.scm b/gnu/packages/ipfs.scm
index ccc36007b4..faa209bf2a 100644
--- a/gnu/packages/ipfs.scm
+++ b/gnu/packages/ipfs.scm
@@ -2,7 +2,7 @@
 ;;; Copyright © 2018 Pierre Neidhardt <mail@ambrevar.xyz>
 ;;; Copyright © 2019, 2020 Tobias Geerinckx-Rice <me@tobias.gr>
 ;;; Copyright © 2019, 2020 Martin Becze <mjbecze@riseup.net>
-;;; Copyright © 2020, 2021 Michael Rohleder <mike@rohleder.de>
+;;; Copyright © 2020, 2021, 2022 Michael Rohleder <mike@rohleder.de>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -230,7 +230,26 @@ (define-public go-ipfs
     (build-system go-build-system)
     (arguments
      `(#:unpack-path "github.com/ipfs/go-ipfs"
-       #:import-path "github.com/ipfs/go-ipfs/cmd/ipfs"))
+       #:import-path "github.com/ipfs/go-ipfs/cmd/ipfs"
+       #:modules ((guix build utils)
+                  (guix build go-build-system)
+                  (ice-9 popen)
+                  (ice-9 textual-ports))
+       #:phases
+       (modify-phases %standard-phases
+         ;; https://github.com/ipfs/kubo/blob/master/docs/command-completion.md
+         (add-after 'install 'install-bashcompletion
+           (lambda* (#:key inputs outputs #:allow-other-keys)
+             (let* ((out (assoc-ref outputs "out"))
+                    (completiondir (string-append out "/etc/bash_completion.d")))
+               (mkdir-p completiondir)
+               (call-with-output-file (string-append completiondir "/ipfs")
+                 (lambda (port)
+                   (let ((input-pipe (open-pipe* OPEN_READ
+                                                 (string-append out "/bin/ipfs")
+                                                 "commands" "completion" "bash")))
+                     (display (get-string-all input-pipe) port)
+                     (close-pipe input-pipe))))))))))
     (native-inputs
      (list python-minimal-wrapper zsh))
     (home-page "https://ipfs.io")
-- 
2.37.3