Drop obsolete versions from JSON programatically

After the final merge is done on the JSON, strip out any named versions
from the final product.

Removing 1.6.5-* and 2.5.0-beta(1,2,3) for now.

Author: earlephilhower

package/build_boards_manager_package.sh

@@ -155,7 +155,8 @@ curl -L -o $old_json "https://github.com/esp8266/Arduino/releases/download/${bas
 new_json=package_esp8266com_index.json
 
 set +e
-python ../../merge_packages.py $new_json $old_json >tmp && mv tmp $new_json && rm $old_json
+# Merge the old and new, then drop any obsolete package versions
+python ../../merge_packages.py $new_json $old_json | python ../../drop_versions.py - platforms 1.6.5-947-g39819f0 2.5.0-beta1 2.5.0-beta2 2.5.0-beta3 >tmp && mv tmp $new_json && rm $old_json
 
 popd
 popd

package/drop_version.py

@@ -0,0 +1,43 @@
+#!/usr/bin/env python
+# This script drops one or multiple versions of a release
+#
+from __future__ import print_function
+import json
+import sys
+
+def load_package(filename):
+    if filename == "-":
+        pkg = json.load(sys.stdin)['packages'][0]
+    else:
+        pkg = json.load(open(filename))['packages'][0]
+    print("Loaded package {0} from {1}".format(pkg['name'], filename), file=sys.stderr)
+    print("{0} platform(s), {1} tools".format(len(pkg['platforms']), len(pkg['tools'])), file=sys.stderr)
+    return pkg
+
+# There's probably a lambda way of doing this, but I can't figure it out...
+def drop_version(todrop, obj):
+    out = [];
+    for o in obj:
+        version = o['version'].encode('ascii')
+        if version == todrop:
+            print("Dropping version {0}".format(todrop))
+        else:
+            out.append(o)
+    return out
+
+def main(args):
+    if len(args) < 3:
+        print("Usage: {0} <inpackage> <section> <version-to-remove> ...".format(args[0]), file=sys.stderr)
+        return 1
+
+    pkg = load_package(args[1])
+    section = args[2]
+    sub = pkg[section]
+    for ver in args[3:]:
+        sub = drop_version(ver, sub)
+    pkg[section] = sub
+
+    json.dump({'packages':[pkg]}, sys.stdout, indent=2)
+
+if __name__ == '__main__':
+    sys.exit(main(sys.argv))