Add bash-completion for secret-tool

Fixes: https://gitlab.gnome.org/GNOME/libsecret/-/issues/50

bash-completion/meson.build

@@ -0,0 +1,10 @@
+bashcompdir = get_option('bashcompdir')
+if bashcompdir == ''
+  bashcomp = dependency('bash-completion', required: get_option(
+    'bash_completion'))
+  if bashcomp.found()
+    bashcompdir = bashcomp.get_pkgconfig_variable('completionsdir')
+  else
+    warning('Will not install bash completion due to missing dependencies!')
+  endif
+endif

bash-completion/secret-tool

@@ -0,0 +1,19 @@
+# secret-tool(8) completion
+
+_secret-tool()
+{
+    local cur prev word cword
+    _init_completion || return
+
+    if [[ $cur == -* ]]; then
+      local opts="--help --verbose -q --quiet" # not sure about the opts
+      COMPREPLY=( $(compgen -W "$opts" -- "$cur") )
+      return
+    elif [[ $cword -eq 1 ]]; then
+      local commands='store lookup clear search'
+      COMPREPLY=( $(compgen -W "$commands" -- "$cur") )
+    fi
+} &&
+complete -F _secret-tool secret-tool
+
+# ex: filetype=sh