From 4b6275c0617628c306c42b98b9c7f2107bf64d48 Mon Sep 17 00:00:00 2001
From: Helmut Grohne <helmut@subdivi.de>
Date: Wed, 28 Sep 2022 10:27:50 +0200
Subject: use portable #!

Also default to python3 at this time.

Reported-by: Robert Smallshire <rob@sixty-north.com>
---
 Makefile | 11 ++++++++---
 tcvt.py  |  2 +-
 2 files changed, 9 insertions(+), 4 deletions(-)

diff --git a/Makefile b/Makefile
index 562f459..225c0db 100644
--- a/Makefile
+++ b/Makefile
@@ -1,3 +1,5 @@
+PYTHON ?= python3
+HASHBANG ?= /usr/bin/env $(PYTHON)
 PREFIX ?= /usr/local
 BINDIR ?= ${PREFIX}/bin
 MANDIR ?= ${PREFIX}/share/man
@@ -5,17 +7,20 @@ MANDIR ?= ${PREFIX}/share/man
 install:build
 	install -d "${DESTDIR}${BINDIR}"
 	install -d "${DESTDIR}${MANDIR}/man1"
-	install -m755 tcvt.py "${DESTDIR}${BINDIR}/tcvt"
+	install -m755 tcvt.py.transformed "${DESTDIR}${BINDIR}/tcvt"
 	install -m755 optcvt.sh.transformed "${DESTDIR}${BINDIR}/optcvt"
 	install -m644 tcvt.1.gz "${DESTDIR}${MANDIR}/man1/tcvt.1.gz"
 	ln -sf tcvt.1.gz "${DESTDIR}${MANDIR}/man1/optcvt.1.gz"
-build:optcvt.sh.transformed tcvt.1.gz
+build:optcvt.sh.transformed tcvt.1.gz tcvt.py.transformed
 clean:
-	rm -f optcvt.sh.transformed tcvt.1.gz
+	rm -f optcvt.sh.transformed tcvt.py.transformed tcvt.1.gz test.tcvterror test.result
 
 optcvt.sh.transformed:optcvt.sh
 	sed 's!^TCVT=.*!TCVT="${BINDIR}/tcvt"!' < $< > $@
 
+tcvt.py.transformed:tcvt.py
+	sed '1c\#!$(HASHBANG)' < $< > $@
+
 %.gz:%
 	gzip -9 < $< > $@
 
diff --git a/tcvt.py b/tcvt.py
index 75ad9f3..f180eb1 100755
--- a/tcvt.py
+++ b/tcvt.py
@@ -1,4 +1,4 @@
-#!/usr/bin/python
+#!/usr/bin/env python3
 #
 # Tow Column Virtual Terminal.
 #
-- 
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