--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/bash-completion.sh	Sun Oct 27 19:49:22 2019 +0100
@@ -0,0 +1,57 @@
+# Relational pipes
+# Copyright © 2019 František Kučera (Frantovo.cz, GlobalCode.info)
+#
+# This program 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, version 3 of the License.
+#
+# This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
+
+_relpipe_tr_awk_completion() {
+	local w0 w1 w2
+
+	COMPREPLY=()
+	w0=${COMP_WORDS[COMP_CWORD]}
+	w1=${COMP_WORDS[COMP_CWORD-1]}
+	w2=${COMP_WORDS[COMP_CWORD-2]}
+
+	DATA_TYPE=(
+		"string"
+		"integer"
+		"boolean"
+	)
+
+	if   [[ "$w1" == "--relation"          && "x$w0" == "x" ]];    then COMPREPLY=("'.*'")
+	elif [[ "$w1" == "--before-records"    && "x$w0" == "x" ]];    then COMPREPLY=("''")
+	elif [[ "$w1" == "--after-records"     && "x$w0" == "x" ]];    then COMPREPLY=("''")
+	elif [[ "$w1" == "--output-attribute"  && "x$w0" == "x" ]];    then COMPREPLY=("''")
+	elif [[ "$w2" == "--output-attribute"                   ]];    then COMPREPLY=($(compgen -W "${DATA_TYPE[*]}" -- "$w0"))
+	elif [[ "$w1" == "--define"            && "x$w0" == "x" ]];    then COMPREPLY=("''")
+	elif [[ "$w2" == "--define"                             ]];    then COMPREPLY=($(compgen -W "${DATA_TYPE[*]}" -- "$w0"))
+	elif [[ "$w3" == "--define"            && "x$w0" == "x" ]];    then COMPREPLY=("''")
+	elif [[ "$w1" == "--for-each"          && "x$w0" == "x" ]];    then COMPREPLY=("'1'")
+	else
+		OPTIONS=(
+			"--relation"
+			"--output-attribute"
+			"--input-attributes-append"
+			"--input-attributes-prepend"
+			"--debug-variable-mapping"
+			"--before-records"
+			"--after-records"
+			"--for-each"
+			"--drop"
+			"--define"
+		)
+		COMPREPLY=($(compgen -W "${OPTIONS[*]}" -- "$w0"))
+	fi
+}
+
+complete -F _relpipe_tr_awk_completion relpipe-tr-awk
+complete -F _relpipe_tr_awk_completion relpipe-in-awk