build.json prettifier

tools/build-cleaner/build-cleaner.py

@@ -0,0 +1,56 @@
+#!/usr/bin/python
+# produces cleaner build.json files
+
+import collections
+import json
+import os
+import sys
+
+_TOP_LEVEL_KEYS = ['settings', 'filegroups', 'libs', 'targets']
+_VERSION_KEYS = ['major', 'minor', 'micro', 'build']
+_ELEM_KEYS = [
+    'name', 
+    'build', 
+    'language', 
+    'public_headers', 
+    'headers', 
+    'src', 
+    'deps']
+
+def rebuild_as_ordered_dict(indict, special_keys):
+  outdict = collections.OrderedDict()
+  for key in special_keys:
+    if key in indict:
+      outdict[key] = indict[key]
+  for key in sorted(indict.keys()):
+    if key in special_keys: continue
+    outdict[key] = indict[key]
+  return outdict
+
+def clean_elem(indict):
+  for name in ['public_headers', 'headers', 'src']:
+    if name not in indict: continue
+    inlist = indict[name]
+    protos = set(x for x in inlist if os.path.splitext(x)[1] == '.proto')
+    others = set(x for x in inlist if x not in protos)
+    indict[name] = sorted(protos) + sorted(others)
+  return rebuild_as_ordered_dict(indict, _ELEM_KEYS)
+
+for filename in sys.argv[1:]:
+  with open(filename) as f:
+    js = json.load(f)
+  js = rebuild_as_ordered_dict(js, _TOP_LEVEL_KEYS)
+  js['settings']['version'] = rebuild_as_ordered_dict(
+      js['settings']['version'], _VERSION_KEYS)
+  for grp in ['filegroups', 'libs', 'targets']:
+    if grp not in js: continue
+    js[grp] = sorted([clean_elem(x) for x in js[grp]],
+                     key=lambda x: x['name'])
+  output = json.dumps(js, indent = 2)
+  # massage out trailing whitespace
+  lines = []
+  for line in output.splitlines():
+    lines.append(line.rstrip() + '\n')
+  with open(filename, 'w') as f:
+    f.write(''.join(lines))
+