Add bin/htmlent

bin/htmlent

@@ -0,0 +1,55 @@
+#!/usr/bin/env python3
+
+# Encode/decode HTML entities in stdin or given file(s).
+
+import getopt
+import sys
+import os
+import fileinput
+import html
+from html.entities import entitydefs
+
+ENTITIES = {value: key for key, value in entitydefs.items()}
+
+def encode(text):
+    t = ""
+    for c in text:
+            if c in ENTITIES:
+                    t += "&" + ENTITIES[c] + ";"
+            else:
+                    t += c
+    return t
+
+def decode(text):
+    return html.unescape(text)
+
+def usage():
+    # TODO Improve this
+    print("Usage: {} [-edh] file1[ file2[ ...]]".format(os.path.basename(sys.argv[0])))
+
+
+if __name__ == '__main__':
+    COMMANDS = {
+        "-e": encode,
+        "-d": decode
+    }
+
+    try:
+        optlist, args = getopt.getopt(sys.argv[1:], 'edh')
+        sys.argv = [sys.argv[0]] + args
+    except getopt.GetoptError as err:
+        print(err)
+        sys.exit(1)
+
+    action = encode
+    for o, a in optlist:
+        if o in COMMANDS:
+            action = COMMANDS[o]
+        elif o == '-h':
+            usage()
+            sys.exit()
+        else:
+            assert False, "unhandled option"
+
+    input = "\n".join([line for line in fileinput.input()]).strip()
+    print(action(input))