feat(sops): add 3rd party fallback completion loader

https://github.com/getsops/sops

completions/Makefile.am

@@ -409,6 +409,7 @@ bashcomp_DATA = 2to3 \
 		smartctl \
 		smbclient \
 		snownews \
+		_sops \
 		sqlite3 \
 		ss \
 		ssh \

completions/_sops

@@ -0,0 +1,24 @@
+# 3rd party completion loader for commands using           -*- shell-script -*-
+# version 1 of the https://cli.urfave.org library.
+#
+# This serves as a fallback in case the completion is not installed otherwise.
+
+# https://github.com/urfave/cli/blob/v1-maint/docs/v1/manual.md#bash-completion
+# https://github.com/urfave/cli/blob/v1-maint/autocomplete/bash_autocomplete
+_comp_cmd__urfave_cli_v1()
+{
+    local cur prev words cword comp_args
+    _comp_initialize -- "$@" || return
+
+    local compcmd=("${words[@]:0:cword}")
+    if [[ $cur == -* ]]; then
+        compcmd+=("$cur")
+    fi
+    compcmd+=(--generate-bash-completion)
+
+    _comp_compgen_split -- "$("${compcmd[@]}" 2>/dev/null)"
+} &&
+    complete -o bashdefault -o default -o nospace \
+        -F _comp_cmd__urfave_cli_v1 "$1"
+
+# ex: filetype=sh

test/fallback/completions/Makefile.am

@@ -38,6 +38,7 @@ EXTRA_DIST = \
 	runuser \
 	rustup \
 	slackpkg \
+	sops \
 	su \
 	svn \
 	svnadmin \

test/fallback/completions/sops

@@ -0,0 +1 @@
+../../../completions/_sops