Utility to make almost independent Lilypond files by incorporating files that have been relatively included into one big file

ly_expander.py

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+#!/usr/bin/env python3
+
+import io, os, sys
+
+# Rewrite relative includes ('./', '../') and copy the files into one big file.
+# This file is then compilable even after it has been moved around.
+
+
+def rewrite_local_lilypond_includes( out_file, fname, recursive = True ):
+	with io.open(fname, 'r', encoding='utf8') as in_file:
+		for i, line in enumerate(in_file.readlines()):
+			if line.startswith(u'\ufeff'): continue
+
+			if '\\include' in line:
+				# Rewrite includes to absolute location of file
+				incline = line.replace('\\include', '').strip('"\'\n ')
+
+				# Only copy if it starts with a "./"
+				if incline.startswith('./') or incline.startswith('../'):
+					# Make it an absolute location first
+					inc_fname = os.path.join(os.path.abspath(os.path.dirname(fname)), incline)
+
+					try:
+						with io.open( inc_fname, 'r', encoding='utf8') as inc_file:
+							out_file.write("% Including Relative File: " + incline + "\n")
+
+							if recursive:
+								rewrite_local_lilypond_includes( out_file, inc_fname, False )
+							else:
+								for subline in inc_file.readlines():
+									out_file.write( subline )
+
+							out_file.write("% End of Relative File: " + incline + "\n")
+
+						# We are done here
+						continue
+
+					except IOError:
+						print("{}:{} Error opening File: '{}'".format(fname, i, incline), file=sys.stderr)
+
+
+			out_file.write(line)
+
+
+
+if __name__ == "__main__":
+	from argparse import ArgumentParser
+	import os
+
+	parser = ArgumentParser()
+	parser.add_argument("files", default='', nargs='+')
+
+	command_group = parser.add_mutually_exclusive_group()
+	command_group.add_argument("-c", "--command", metavar="COMMAND",
+		dest="runcommand", default=None,
+		help="Run COMMAND on the generated file")
+	command_group.add_argument("-l", "--lilypond",
+		action="store_true", dest="uselilypond", default=False,
+		help="Run Lilypond on the generated file")
+
+
+	parser.add_argument("-o", "--options", nargs='?',
+		action="append", dest="options", default=[],
+		help="Options to pass to lilypond")
+	parser.add_argument("-k", "--keep",
+		action="store_false", dest="delete_tempfile", default=True,
+		help="Keep Temporary File after running COMMAND on it")
+
+	args = parser.parse_args()
+	
+	if args.uselilypond:
+		args.runcommand = 'lilypond'
+
+	if args.runcommand:
+		import subprocess
+		import tempfile
+
+	else:
+		import sys
+		out_file = sys.stdout
+
+	for f in args.files:
+		if args.runcommand:
+			
+			out_file = tempfile.NamedTemporaryFile( mode='w+', suffix='.ly', delete=args.delete_tempfile, prefix=os.path.basename(f).rsplit('.', 1)[0], dir=os.path.abspath(os.path.dirname(f)) )
+
+		out_file.write('\ufeff')
+		out_file.write("%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%\n")
+		out_file.write("% This file was preprocessed by a script '" + os.path.basename(__file__) + "'\n")
+		out_file.write("% that copies all '\\include \"./\"'d files into one file\n")
+		out_file.write("% such that it can be moved around and still be compiled\n")
+		out_file.write("%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%\n")
+		out_file.write("% Original file: " + f + "\n")
+		out_file.write("%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%\n\n")
+
+		rewrite_local_lilypond_includes( out_file, f )
+
+		out_file.flush()
+
+		if args.runcommand:
+			print( args.runcommand + " " + " ".join(args.options) + " " + out_file.name )
+			subprocess.call( args.runcommand + " " + " ".join(args.options) + " " + out_file.name, shell=True )