--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/bash-completion.sh	Wed Dec 09 17:55:03 2020 +0100
@@ -0,0 +1,77 @@
+# Relational pipes
+# Copyright © 2020 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_out_ini_completion() {
+	local w0 w1 w2 w3
+
+	COMPREPLY=()
+	w0=${COMP_WORDS[COMP_CWORD]}
+	w1=${COMP_WORDS[COMP_CWORD-1]}
+	w2=${COMP_WORDS[COMP_CWORD-2]}
+	w3=${COMP_WORDS[COMP_CWORD-3]}
+
+	BOOLEAN_VALUES=(
+		"true"
+		"false"
+	)
+
+	STYLES=(
+		"auto"
+		"dropped"
+		"literal"
+		"literal-with-section-attribute"
+		"standard"
+	)
+
+	DIALECTS=(
+		"java-properties"
+	);
+
+	WRITER_OPTIONS=(
+		"dialect"
+		"comment-separator-for-sections"
+		"comment-separator-for-entries"
+		"comment-separator-standalone"
+		"key-value-separator"
+		"escape-backspace"
+		"escape-basic"
+		"escape-java-properties"
+	);
+
+
+	if   [[ "$w1" == "--relation"                                            && "x$w0" == "x" ]];    then COMPREPLY=("''")
+	elif [[ "$w1" == "--style"                                                                ]];    then COMPREPLY=($(compgen -W "${STYLES[*]}" -- "$w0"))
+	elif [[ "$w1" == "--writer-option"                                                        ]];    then COMPREPLY=($(compgen -W "${WRITER_OPTIONS[*]}" -- "$w0"))
+	elif [[ "$w2" == "--writer-option" && "$w1" == "dialect"                                  ]];    then COMPREPLY=($(compgen -W "${DIALECTS[*]}" -- "$w0"))
+	elif [[ "$w2" == "--writer-option" && "$w1" == "comment-separator-for-sections"           ]];    then COMPREPLY=("' ; '")
+	elif [[ "$w2" == "--writer-option" && "$w1" == "comment-separator-for-entries"            ]];    then COMPREPLY=("' ; '")
+	elif [[ "$w2" == "--writer-option" && "$w1" == "comment-separator-standalone"             ]];    then COMPREPLY=("'; '")
+	elif [[ "$w2" == "--writer-option" && "$w1" == "key-value-separator"                      ]];    then COMPREPLY=("' = '")
+	elif [[ "$w2" == "--writer-option" && "$w1" == "escape-backspace"                         ]];    then COMPREPLY=($(compgen -W "${BOOLEAN_VALUES[*]}" -- "$w0"))
+	elif [[ "$w2" == "--writer-option" && "$w1" == "escape-basic"                             ]];    then COMPREPLY=($(compgen -W "${BOOLEAN_VALUES[*]}" -- "$w0"))
+	elif [[ "$w2" == "--writer-option" && "$w1" == "escape-java-properties"                   ]];    then COMPREPLY=($(compgen -W "${BOOLEAN_VALUES[*]}" -- "$w0"))
+	elif [[ "$w2" == "--writer-option"                                       && "x$w0" == "x" ]];    then COMPREPLY=("''")
+
+	else
+		OPTIONS=(
+			"--writer-option"
+			"--relation"
+			"--style"
+		)
+		COMPREPLY=($(compgen -W "${OPTIONS[*]}" -- "$w0"))
+	fi
+}
+
+complete -F _relpipe_out_ini_completion relpipe-out-ini