mmnode-blocks-info: restore --stats-only option

mmgen/node_tools/BlocksInfo.py

@@ -33,6 +33,7 @@ class BlocksInfo:
 	total_bytes = 0
 	total_weight = 0
 	total_solve_time = 0
+	header_printed = False
 
 	bf = namedtuple('block_info_fields',['fmt_func','src','fs','hdr1','hdr2','key1','key2'])
 	# bh=getblockheader, bs=getblockstats, lo=local
@@ -343,7 +344,7 @@ class BlocksInfo:
 				self.t_cur = self.prev_hdrs[n]['time']
 			ret = await self.process_block(self.hdrs[n])
 			self.res.append(ret)
-			if self.fnames:
+			if self.fnames and not self.opt.stats_only:
 				self.output_block(ret,n)
 
 	def output_block(self,data,n):
@@ -403,6 +404,7 @@ class BlocksInfo:
 
 	def print_header(self):
 		Msg('\n'.join(self.gen_header()))
+		self.header_printed = True
 
 	def gen_header(self):
 		hdr1 = [v.hdr1 for v in self.fvals]
@@ -519,6 +521,8 @@ class BlocksInfo:
 					ret = sum(getattr(block,field) for block in self.res) // len(self.res)
 					func = self.fields[field].fmt_func
 					yield ( field, ( (self.fmt_funcs[func] if func else '{}'), ret ))
+		if not self.header_printed:
+			self.print_header()
 		fs = ''.join(self.gen_fs(self.fnames,fill=skip,add_name=True)).strip()
 		return ('averages', ('Averages:', (fs, dict(gen())) ))
 
@@ -543,7 +547,7 @@ class BlocksInfo:
 		return ( 'totals', ['Totals:'] + res )
 
 	def process_stats_pre(self,i):
-		if self.fnames or i != 0:
+		if (self.fnames and not self.opt.stats_only) or i != 0:
 			Msg('')
 
 	def finalize_output(self): pass

mmnode-blocks-info

@@ -30,6 +30,7 @@ opts_data = {
 		('header_info',    True,   'stats',      'range'),
 		('json_raw',       True,   'json',       True),
 		('raw_miner_info', True,   'miner_info', True),
+		('stats_only',     True,   'no_header',  True),
 	],
 	'text': {
 		'desc':    'Display information about a block or range of blocks',
@@ -56,6 +57,7 @@ opts_data = {
 -s, --stats=          Display the specified stats (comma-separated list).
                       See AVAILABLE STATS below.  The prefixes and special
                       values available to the --fields option are recognized.
+-S, --stats-only      Display stats only.  Suppress display of per-block data.
 """,
 	'notes': """
 If no block number is specified, the current chain tip is assumed.
@@ -117,6 +119,9 @@ EXAMPLES:
     Display all fields and stats for the last ten blocks:
     $ {p} -o all -s all +10
 
+    Same as above, but display stats only:
+    $ {p} -o all -s all -S +10
+
     Display headers-only info for the last 1000 blocks.  Speed up execution
     using the async RPC backend:
     $ {p} --rpc-backend=aio -H +1000