#!/bin/sh

# pyccopy:   a build-time utiltiy script

# objective: copy one or more source python (.py) scripts

#            to the destination directory specified via the

#            environment variable PYCOPY_DSTDIR, replacing

#            the original shebang line, should the script

#            contain one, with a program interpreter based

#            on the PYCOPY_PREFIX and PYCOPY_PYTHON

#            environment variables.

if [ -z "$PYCOPY_PYTHON" ]; then

	python='python'

else

	python="$PYCOPY_PYTHON"

fi

if [ -z "$PYCOPY_PREFIX" ]; then

	prefix='/usr'

else

	prefix="$PYCOPY_PREFIX"

fi

if [ -z "$PYCOPY_DSTDIR" ]; then

	dstdir='.'

else

	dstdir="$PYCOPY_DSTDIR"

fi

for pysrc in $@; do

	basename=$(basename "$pysrc");

	sed -e '1s@^#!.*@#!'" $prefix/bin/$python"'@g'   \

		"$pysrc" > "$dstdir/$basename"          || exit 2

	if [ "$(head -n1 "$dstdir/$basename")" = "#! $prefix/bin/$python" ]; then

		chmod +x "$dstdir/$basename"            || exit 2

	fi

done

exit 0