shell-completion/*/insmod: add bash/fish/zsh completion

A few inline todos and some odd fish behaviour as mentioned inline.
Otherwise things just work :-)

v2:
 - use e(x)clusive answers for fish, tweak force string

Signed-off-by: Emil Velikov <[email protected]>

meson.build

@@ -215,6 +215,7 @@ foreach tuple : _completiondirs
   endif
 
   _completions = [
+    'insmod',
     'lsmod',
     'rmmod',
   ]

shell-completion/bash/insmod

@@ -0,0 +1,35 @@
+# insmod(8) completion                                      -*- shell-script -*-
+# SPDX-License-Identifier: LGPL-2.1-or-later
+#
+# Copyright 2024 Emil Velikov
+#
+# Formatted using:
+# shfmt --language-dialect bash --indent 4 --func-next-line
+
+_insmod()
+{
+    # long/short opt pairs
+    local -A opts=(
+        ['force']='f'
+        ['syslog']='s'
+        ['verbose']='v'
+        ['version']='V'
+        ['help']='h'
+    )
+
+    local cur="${COMP_WORDS[COMP_CWORD]}"
+
+    if [[ $cur == --* ]]; then
+        COMPREPLY=($(compgen -P '--' -W "${!opts[*]}" -- "${cur:2}"))
+    elif [[ $cur == -* ]]; then
+        if (( ${#cur} != 2 )); then
+            COMPREPLY=($(compgen -P '--' -W "${!opts[*]}" -- "${cur:2}"))
+        fi
+        COMPREPLY+=($(compgen -P '-' -W "${opts[*]}" -- "${cur:1}"))
+    else
+        # TODO: match only one file
+        _filedir '@(ko?(.gz|.xz|.zst))'
+        # TODO: add module parameter completion, based of modinfo
+    fi
+} &&
+    complete -F _insmod insmod

shell-completion/fish/insmod.fish

@@ -0,0 +1,21 @@
+# insmod(8) completion                                      -*- shell-script -*-
+# SPDX-License-Identifier: LGPL-2.1-or-later
+#
+# Copyright 2024 Emil Velikov
+
+# globally disable file completions
+complete -c insmod -f
+
+complete -c insmod -s f -l force -d "DANGEROUS: forces a module load, may cause data corruption and crash your machine"
+complete -c insmod -s s -l syslog -d 'print to syslog, not stderr'
+complete -c insmod -s v -l verbose -d 'enables more messages'
+complete -c insmod -s V -l version -d 'show version'
+complete -c insmod -s h -l help -d 'show this help'
+
+# provide an exclusive (x) list of required (r) answers (a), keeping (k) the
+# matches at the top.
+# TODO: match only one file
+# BUG: fish lists everything, even when only the given suffix is requested. Plus
+# we need to explicitly keep them sorted.
+complete -c insmod -x -ra "(__fish_complete_suffix .ko .ko.gz .ko.xz .ko.zst)" -k
+# TODO: add module parameter completion, based of modinfo

shell-completion/zsh/_insmod

@@ -0,0 +1,14 @@
+#compdef insmod
+
+# insmod(8) completion                                      -*- shell-script -*-
+# SPDX-License-Identifier: LGPL-2.1-or-later
+#
+# Copyright 2024 Emil Velikov
+
+_arguments \
+    {-f,--force}'[DANGEROUS: forces a module load, may cause data corruption and crash your machine]' \
+    {-s,--syslog}'[print to syslog, not stderr]' \
+    {-v,--verbose}'[enables more messages]' \
+    {-V,--version}'[show version]' \
+    {-h,--help}'[show this help]' \
+    '1::module:_files -g "*.ko(|.gz|.xz|.zst)"'