Refactor. Added an example of how to use environment variables in a configuration file.

3 files changed, 76 insertions, 0 deletions

diff --git a/examples/environment_variables/environment_variables.cfg b/examples/environment_variables/environment_variables.cfg
new file mode 100644
index 0000000..9f14c93
--- /dev/null
+++ b/examples/environment_variables/environment_variables.cfg
@@ -0,0 +1,5 @@
+[Configuration]
+motd = It was all so different before everything changed, your home is $(HOME)
+
+[Inputs]
+input_string = 42
diff --git a/examples/environment_variables/environment_variables.pcl b/examples/environment_variables/environment_variables.pcl
new file mode 100644
index 0000000..b7995c9
--- /dev/null
+++ b/examples/environment_variables/environment_variables.pcl
@@ -0,0 +1,29 @@
+#
+# Copyright Capita Translation and Interpreting 2013
+#
+# This file is part of Pipeline Creation Language (PCL).
+# 
+# Pipeline Creation Language (PCL) is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+# 
+# Pipeline Creation Language (PCL) is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+# 
+# You should have received a copy of the GNU General Public License
+# along with Pipeline Creation Language (PCL).  If not, see <http://www.gnu.org/licenses/>.
+#
+import motd as message_of_the_day
+
+component environment_variables
+  inputs input_string
+  output output_string
+  configuration motd
+  declare
+    motd := new message_of_the_day with motd -> message
+  as
+    wire input_string -> string >>> motd >>> wire string -> output_string
+
diff --git a/examples/environment_variables/motd.py b/examples/environment_variables/motd.py
new file mode 100644
index 0000000..ef1c47f
--- /dev/null
+++ b/examples/environment_variables/motd.py
@@ -0,0 +1,42 @@
+#
+# Copyright Capita Translation and Interpreting 2013
+#
+# This file is part of Pipeline Creation Language (PCL).
+# 
+# Pipeline Creation Language (PCL) is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+# 
+# Pipeline Creation Language (PCL) is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+# 
+# You should have received a copy of the GNU General Public License
+# along with Pipeline Creation Language (PCL).  If not, see <http://www.gnu.org/licenses/>.
+#
+import sys
+
+def get_name():
+  return 'motd'
+
+def get_inputs():
+  return ['string']
+
+def get_outputs():
+  return ['string']
+
+def get_configuration():
+  return ['message']
+
+def configure(args):
+  return {'motd' : args['message']}
+
+def initialise(config):
+  def echo_fn(a, s):
+    print >> sys.stdout, "%s: %s" % (config['motd'], a['string'])
+    return {'string' : a['string']}
+
+  return echo_fn
+