yet another tool (very straightforward behaviour for now: actually mo…

…r of "concatenate" than of "merge" kind);

will improve later


git-svn-id: https://slps.svn.sourceforge.net/svnroot/slps@1100 ab42f6e0-554d-0410-b580-99e487e6eeb2

shared/tools/mergebgf

@@ -0,0 +1,15 @@
+#! /bin/sh
+
+# Get our hands on basedir
+LOCAL=${PWD}
+cd `dirname $0`
+cd ../..
+SLPS=${PWD}
+cd ${LOCAL}
+
+if [ $# -lt 3 ]; then
+    echo "Usage: mergebgf <BGF-input> [<BGF-input>...] <BGF-output>"
+    exit 1
+else
+	${SLPS}/topics/transformation/merge/merge.py $*
+fi

topics/transformation/merge/merge.py

@@ -0,0 +1,40 @@
+#!/Library/Frameworks/Python.framework/Versions/3.1/bin/python3
+# -*- coding: utf-8 -*-
+import os, sys
+import xml.etree.ElementTree as ET
+sys.path.append(os.getcwd().split('slps')[0]+'slps/shared/python')
+import BGF3
+from functools import reduce
+
+if __name__ == "__main__":
+	if len(sys.argv) < 4:
+		print('Usage:')
+		print('	merge.py input1.bgf [inputX.bgf ...] output.bgf')
+		sys.exit(-1)
+	bgfs = []
+	names = []
+	nts = []
+	for fname in sys.argv[1:-1]:
+		g = BGF3.Grammar()
+		g.parse(fname)
+		bgfs.append(g)
+		names.append(fname)
+	print(len(bgfs),'grammars read.')
+	for i in range(0,len(bgfs)):
+		n = []
+		for p in bgfs[i].prods:
+			if p.nt not in n:
+				n.append(p.nt)
+		nts.append(n)
+		print('\t',names[i],'has',len(bgfs[i].prods),'productions,',len(nts[i]),'nonterminals and',len(bgfs[i].roots),'roots')
+	# FINAL STEP: compose BGF
+	allbgf = BGF3.Grammar()
+	# roots are combined
+	for g in bgfs:
+		for r in g.roots:
+			allbgf.addRoot(r)
+		# TODO: write a real merge, not just concatenate
+		for p in g.prods:
+			allbgf.addProd(p)
+	ET.ElementTree(allbgf.getXml()).write(sys.argv[-1])
+	print('Merged BGF written to',sys.argv[-1])