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[bug#63860] [PATCH] Add Bash completion file.


From: Oleg Pykhalov
Subject: [bug#63860] [PATCH] Add Bash completion file.
Date: Sat, 3 Jun 2023 01:21:22 +0300

* etc/completion/bash/herd: New file.
* Makefile.am (dist_bashcompletion_DATA): New variable.
* configure.ac: Add --with-bash-completion-dir.
---
 Makefile.am              |   4 ++
 configure.ac             |   9 ++++
 etc/completion/bash/herd | 104 +++++++++++++++++++++++++++++++++++++++
 3 files changed, 117 insertions(+)
 create mode 100644 etc/completion/bash/herd

diff --git a/Makefile.am b/Makefile.am
index d82e75c..d7b5d36 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -2,6 +2,7 @@
 # Copyright © 2002, 2003 Wolfgang Jährling <wolfgang@pro-linux.de>
 # Copyright © 2013-2016, 2018-2020, 2022-2023 Ludovic Courtès <ludo@gnu.org>
 # Copyright © 2018 Carlo Zancanaro <carlo@zancanaro.id.au>
+# Copyright © 2023 Oleg Pykhalov <go.wigust@gmail.com>
 #
 # This file is part of the GNU Shepherd.
 #
@@ -135,6 +136,9 @@ doc/%.8: modules/shepherd/scripts/%.scm configure.ac
 dist_man1_MANS = doc/shepherd.1 doc/herd.1
 dist_man8_MANS = doc/halt.8 doc/reboot.8
 
+# Bash completion file.
+dist_bashcompletion_DATA = etc/completion/bash/herd
+
 # Things not automatically included in the distribution.
 EXTRA_DIST +=                                  \
   build-aux/config.rpath                       \
diff --git a/configure.ac b/configure.ac
index 18455a0..8aaea92 100644
--- a/configure.ac
+++ b/configure.ac
@@ -172,6 +172,15 @@ esac
 AC_MSG_RESULT([$build_crash_handler])
 AM_CONDITIONAL([BUILD_CRASH_HANDLER], [test "x$build_crash_handler" = "xyes"])
 
+dnl Bash completion file.
+
+AC_ARG_WITH([bash-completion-dir],
+  AC_HELP_STRING([--with-bash-completion-dir=DIR],
+    [name of the Bash completion directory]),
+  [bashcompletiondir="$withval"],
+  [bashcompletiondir='${sysconfdir}/bash_completion.d'])
+AC_SUBST([bashcompletiondir])
+
 dnl Manual pages.
 AM_MISSING_PROG([HELP2MAN], [help2man])
 
diff --git a/etc/completion/bash/herd b/etc/completion/bash/herd
new file mode 100644
index 0000000..c6a1a63
--- /dev/null
+++ b/etc/completion/bash/herd
@@ -0,0 +1,104 @@
+# GNU Shepherd --- System service manager for GNU
+# Copyright © 2023 Oleg Pykhalov <go.wigust@gmail.com>
+#
+# This file is part of GNU Shepherd.
+#
+# GNU Shepherd 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 Shepherd 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 Shepherd.  If not, see <http://www.gnu.org/licenses/>.
+
+# Bash completion for Shepherd commands.
+
+_herd_complete_subcommand()
+{
+    local command="${COMP_WORDS[1]}"
+    case "$command" in
+        discover)
+            complitions="guix-daemon"
+            COMPREPLY=($(compgen -W "$complitions" -- 
"${COMP_WORDS[$COMP_CWORD]}"))
+            ;;
+        schedule)
+            complitions="mcron"
+            COMPREPLY=($(compgen -W "$complitions" -- 
"${COMP_WORDS[$COMP_CWORD]}"))
+            ;;
+        set-http-proxy)
+            complitions="guix-daemon"
+            COMPREPLY=($(compgen -W "$complitions" -- 
"${COMP_WORDS[$COMP_CWORD]}"))
+            ;;
+        *)
+            local services="$(herd status | grep '^ +\|^ -\| \*' | cut -d ' ' 
-f3)"
+            COMPREPLY=($(compgen -W "$services" -- 
"${COMP_WORDS[$COMP_CWORD]}"))
+            ;;
+    esac
+}
+
+_herd_complete_3()
+{
+    local command="${COMP_WORDS[2]}"
+    case "$command" in
+        guix-daemon)
+            complitions="on off"
+            COMPREPLY=($(compgen -W "$complitions" -- 
"${COMP_WORDS[$COMP_CWORD]}"))
+            ;;
+        *)
+            ;;
+    esac
+}
+
+_herd_is_command ()
+{
+    local word
+    local result="false"
+    for word in ${COMP_WORDS[*]}
+    do
+       if [ "$word" = "$1" ]
+       then
+           result=true
+           break
+       fi
+    done
+    $result
+}
+
+_herd_complete()
+{
+    local word_count=${#COMP_WORDS[*]}
+    local word_at_point="${COMP_WORDS[$COMP_CWORD]}"
+    case $COMP_CWORD in
+        1)
+           if [ -z "$_herd_subcommands" ]
+           then
+               # Cache the list of subcommands to speed things up.
+                _herd_subcommands=(
+                    disable
+                    discover
+                    enable
+                    schedule
+                    set-http-proxy
+                    start
+                    status
+                    stop
+                )
+               _herd_subcommands="${_herd_subcommands[@]}"
+           fi
+            COMPREPLY=($(compgen -W "$_herd_subcommands" -- 
"${COMP_WORDS[$COMP_CWORD]}"))
+            ;;
+        *)
+            case $COMP_CWORD in
+               2) _herd_complete_subcommand;;
+               3) _herd_complete_3;;
+           esac
+            ;;
+    esac
+}
+
+complete -F _herd_complete herd
-- 
2.38.0






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