packs: make debug*pack commands take more paths

Summary:
Previously 'hg debug[data|hist]pack' required passing the filepath without the
suffix (just up to the hash). This was kind of a pain when using tab complete,
and a pain in tests when trying to use 'find' to run hg debugdatapack on a
number of files. Let's make the debug commands more forgiving.

Test Plan: Manual verification

Reviewers: #mercurial, dsyang, rmcelroy

Reviewed By: rmcelroy

Subscribers: rmcelroy, mjpieters

Differential Revision: https://phabricator.intern.facebook.com/D4261586

Signature: t1:4261586:1480705548:1aa5dbe44ed5e29c28a29a8256de12ffee8d7387

remotefilelog/debugcommands.py

@@ -189,6 +189,8 @@ def parsefileblob(path, decompress):
     return size, firstnode, mapping
 
 def debugdatapack(ui, path, **opts):
+    if '.data' in path:
+        path = path[:path.index('.data')]
     dpack = datapack.datapack(path)
 
     node = opts.get('node')
@@ -239,6 +241,8 @@ def dumpdeltachain(ui, deltachain, **opts):
             len(delta)))
 
 def debughistorypack(ui, path):
+    if '.hist' in path:
+        path = path[:path.index('.hist')]
     hpack = historypack.historypack(path)
 
     lastfilename = None