add a wrapper script using ttq with git push-options (MR 2)

It's possible to push to a branch and open an MR with a single command
on GitLab with

  git push -o merge_request.create

One can also adjust the MR title and description with

  merge_request.title="beep"
  merge_request.description="boop"

However, it isn't possible to include newline literals in git push
options. As a workaround GitLab will automatically convert all '\n'
literals into newlines.

To enable using this with TTQ, add a simple wrapper script which runs
TTQ through awk to convert all newline literals into '\n'.

Signed-off-by: Caleb Connolly <caleb.connolly@linaro.org>

ttqs

+#!/bin/sh -e
+# TTQ-WRAPPER
+# Wrap the TTQ python script to allow for filtering on stdout such as to
+# replace newlines with the literal '\n' to allow # for TTQ output to be
+# used in git push-options (which don't allow newlines)
+
+BASEDIR=$(dirname "$(realpath "$0")")
+TTQ="$BASEDIR/ttq.py"
+
+if [ ! -f "$TTQ" ]; then
+	# If this fails the script will abort
+	TTQ="$(which ttq)"
+	if grep -q "TTQ-WRAPPER" "$TTQ"; then
+		echo "Can't find TTQ python script, only this wrapper!" >&2
+		exit 1
+	fi
+fi
+
+# Invoke TTQ and convert newlines to '\n' literals
+$TTQ $* | awk '{printf "%s\\n", $0}'
+
+