pySim-shell: Add settable parameter on JSON pretty-printing

Change-Id: Ic095c96733de2b0f359bfe067cd719d38712faff

docs/shell.rst

@@ -208,6 +208,14 @@ Writes will only be performed if the new value is different from the current on-
 
 If disabled, pySim will always write irrespective of the current/new value.
 
+json_pretty_print
+~~~~~~~~~~~~~~~~~
+
+This parameter determines if generated JSON output should (by default) be pretty-printed (multi-line
+output with indent level of 4 spaces) or not.
+
+The default value of this parameter is 'true'.
+
 debug
 ~~~~~
 

pySim-shell.py

@@ -72,6 +72,16 @@ class PysimApp(cmd2.Cmd):
 		self.add_settable(cmd2.Settable('conserve_write', bool, 'Read and compare before write',
 						  onchange_cb=self._onchange_conserve_write))
 		self.update_prompt()
+		self.json_pretty_print = True
+		self.add_settable(cmd2.Settable('json_pretty_print', bool, 'Pretty-Print JSON output'))
+
+	def poutput_json(self, data, force_no_pretty = False):
+		"""line cmd2.putput() but for a json serializable dict."""
+		if force_no_pretty or self.json_pretty_print == False:
+			output = json.dumps(data)
+		else:
+			output = json.dumps(data, indent=4)
+		self.poutput(output)
 
 	def _onchange_numeric_path(self, param_name, old, new):
 		self.update_prompt()

pySim/filesystem.py

@@ -404,11 +404,7 @@ class TransparentEF(CardEF):
         def do_read_binary_decoded(self, opts):
             """Read + decode data from a transparent EF"""
             (data, sw) = self._cmd.rs.read_binary_dec()
-            if opts.oneline:
-                output = json.dumps(data)
-            else:
-                output = json.dumps(data, indent=4)
-            self._cmd.poutput(output)
+            self._cmd.poutput_json(data, opts.oneline)
 
         upd_bin_parser = argparse.ArgumentParser()
         upd_bin_parser.add_argument('--offset', type=int, default=0, help='Byte offset for start of read')
@@ -428,7 +424,7 @@ class TransparentEF(CardEF):
             data_json = json.loads(opts.data)
             (data, sw) = self._cmd.rs.update_binary_dec(data_json)
             if data:
-                self._cmd.poutput(json.dumps(data, indent=4))
+                self._cmd.poutput_json(data)
 
     def __init__(self, fid:str, sfid:str=None, name:str=None, desc:str=None, parent:CardDF=None,
                  size={1,None}):
@@ -563,11 +559,7 @@ class LinFixedEF(CardEF):
         def do_read_record_decoded(self, opts):
             """Read + decode a record from a record-oriented EF"""
             (data, sw) = self._cmd.rs.read_record_dec(opts.record_nr)
-            if opts.oneline:
-                output = json.dumps(data)
-            else:
-                output = json.dumps(data, indent=4)
-            self._cmd.poutput(output)
+            self._cmd.poutput_json(data, opts.oneline)
 
         upd_rec_parser = argparse.ArgumentParser()
         upd_rec_parser.add_argument('record_nr', type=int, help='Number of record to be read')