patchbomb: add content-disposition to make display inline and add filename

if rev being emailed has tag that ends in .patch or .diff then use that as
filename. else make up filename from name of repo.

hgext/patchbomb.py

@@ -45,6 +45,7 b" demandload(globals(), '''email.MIMEMulti"
                          mercurial:commands,hg,ui
                          os errno popen2 socket sys tempfile time''')
 from mercurial.i18n import gettext as _
+from mercurial.node import *
 
 try:
     # readline gives raw_input editing capabilities, but is not
@@ -133,7 +134,20 b' def patchbomb(ui, repo, *revs, **opts):'
         if opts['attach']:
             msg = email.MIMEMultipart.MIMEMultipart()
             if body: msg.attach(email.MIMEText.MIMEText(body, 'plain'))
-            msg.attach(email.MIMEText.MIMEText('\n'.join(patch), 'x-patch'))
+            p = email.MIMEText.MIMEText('\n'.join(patch), 'x-patch')
+            node = bin(node)
+            # if node is mq patch, it will have patch file name as tag
+            patchname = [t for t in repo.nodetags(node)
+                         if t.endswith('.patch') or t.endswith('.diff')]
+            if patchname:
+                patchname = patchname[0]
+            elif total > 1:
+                patchname = commands.make_filename(repo, '%b-%n.patch',
+                                                   node, idx, total)
+            else:
+                patchname = commands.make_filename(repo, '%b.patch', node)
+            p['Content-Disposition'] = 'inline; filename=' + patchname
+            msg.attach(p)
         else:
             body += '\n'.join(patch)
             msg = email.MIMEText.MIMEText(body)