1 files changed, 43 insertions, 0 deletions
diff --git a/examples/chaindemo.py b/examples/chaindemo.py
new file mode 100644
index 0000000..6290b58
--- /dev/null
+++ b/examples/chaindemo.py
@@ -0,0 +1,43 @@
+#!/usr/bin/env python3
+''' Demo of how to chain calls to multiple scripts together.
+Running
+   python chaindemo.py infont outfont --featfile feat.csv --uidsfile uids.csv
+will run execute() against psfnormalize, psfsetassocfeat and psfsetassocuids passing the font, parameters
+and logger objects from one call to the next.  So:
+- the font is only opened once and written once
+- there is a single log file produced
+'''
+__url__ = 'https://github.com/silnrsi/pysilfont'
+__copyright__ = 'Copyright (c) 2017 SIL International (https://www.sil.org)'
+__license__ = 'Released under the MIT License (https://opensource.org/licenses/MIT)'
+__author__ = 'David Raymond'
+
+from silfont.core import execute, chain
+import silfont.scripts.psfnormalize as psfnormalize
+import silfont.scripts.psfsetassocfeat as psfsetassocfeat
+import silfont.scripts.psfsetassocuids as psfsetassocuids
+
+argspec = [
+    ('ifont',{'help': 'Input font file'}, {'type': 'infont'}),
+    ('ofont',{'help': 'Output font file','nargs': '?' }, {'type': 'outfont'}),
+    ('--featfile',{'help': 'Associate features csv'}, {'type': 'filename'}),
+    ('--uidsfile', {'help': 'Associate uids csv'}, {'type': 'filename'}),
+    ('-l','--log',{'help': 'Log file'}, {'type': 'outfile', 'def': '_chain.log'})]
+
+def doit(args) :
+
+    argv = ['psfnormalize', 'dummy'] # 'dummy' replaces input font since font object is being passed.  Other parameters could be added.
+    font = chain(argv, psfnormalize.doit, psfnormalize.argspec, args.ifont, args.paramsobj, args.logger, args.quiet)
+
+    argv = ['psfsetassocfeat', 'dummy', '-i', args.featfile]
+    font = chain(argv, psfsetassocfeat.doit, psfsetassocfeat.argspec, font,       args.paramsobj, args.logger, args.quiet)
+
+    argv = ['psfsetassocuids', 'dummy', '-i', args.uidsfile]
+    font = chain(argv, psfsetassocuids.doit, psfsetassocuids.argspec, font,       args.paramsobj, args.logger, args.quiet)
+
+    return font
+
+def cmd() : execute("UFO",doit, argspec)
+
+if __name__ == "__main__": cmd()
+