Revert "Remove yaml exporter"

This reverts commit 4f7804b.

Author: mshawcroft

tools/export/__init__.py

@@ -17,6 +17,7 @@
 import os, tempfile
 from os.path import join, exists, basename
 from shutil import copytree, rmtree, copy
+import yaml
 
 from tools.utils import mkdir
 from tools.export import uvision4, codered, gccarm, ds5_5, iar, emblocks, coide, kds, zip, simplicityv3, atmelstudio, sw4stm32
@@ -54,7 +55,7 @@ def online_build_url_resolver(url):
 
 
 def export(project_path, project_name, ide, target, destination='/tmp/',
-           tempdir=None, clean=True, extra_symbols=None, zip=True, build_url_resolver=online_build_url_resolver):
+           tempdir=None, clean=True, extra_symbols=None, build_url_resolver=online_build_url_resolver):
     # Convention: we are using capitals for toolchain and target names
     if target is not None:
         target = target.upper()
@@ -108,16 +109,30 @@ def export(project_path, project_name, ide, target, destination='/tmp/',
 
     zip_path = None
     if report['success']:
+        # readme.txt to contain more exported data
+        exporter_yaml = { 
+            'project_generator': {
+                'active' : False,
+            }
+        }
+        if use_progen:
+            try:
+                import pkg_resources
+                version = pkg_resources.get_distribution('project_generator').version
+                exporter_yaml['project_generator']['version'] = version
+                exporter_yaml['project_generator']['active'] =  True;
+                exporter_yaml['project_generator_definitions'] = {}
+                version = pkg_resources.get_distribution('project_generator_definitions').version
+                exporter_yaml['project_generator_definitions']['version'] = version
+            except ImportError:
+                pass
+        with open(os.path.join(tempdir, 'exporter.yaml'), 'w') as outfile:
+            yaml.dump(exporter_yaml, outfile, default_flow_style=False)
         # add readme file to every offline export.
         open(os.path.join(tempdir, 'GettingStarted.htm'),'w').write('<meta http-equiv="refresh" content="0; url=http://mbed.org/handbook/Getting-Started-mbed-Exporters#%s"/>'% (ide))
         # copy .hgignore file to exported direcotry as well.
-        if exists(os.path.join(exporter.TEMPLATE_DIR,'.hgignore')):
-            copy(os.path.join(exporter.TEMPLATE_DIR,'.hgignore'),tempdir)
-        
-        if zip:
-            zip_path = zip_working_directory_and_clean_up(tempdir, destination, project_name, clean)
-        else:
-            zip_path = destination
+        copy(os.path.join(exporter.TEMPLATE_DIR,'.hgignore'),tempdir)
+        zip_path = zip_working_directory_and_clean_up(tempdir, destination, project_name, clean)
 
     return zip_path, report