annotate: port to generic templater enabled by hidden -T option

If the selected formatter is other than plainformatter, raw data are passed
to the formatter.  In this case, it isn't necessary (and not possible) to
calculate column widths.

Field names are substituted to be the same as "log" command.

There are a few limitations:

 - "binary file" message is not included in formatted output.
 - no data structure for multiple files. all lines are packed to single list.

mercurial/commands.py

@@ -247,7 +247,7 b' def addremove(ui, repo, *pats, **opts):'
     ('n', 'number', None, _('list the revision number (default)')),
     ('c', 'changeset', None, _('list the changeset')),
     ('l', 'line-number', None, _('show line number at the first appearance'))
-    ] + diffwsopts + walkopts,
+    ] + diffwsopts + walkopts + formatteropts,
     _('[-r REV] [-f] [-a] [-u] [-d] [-n] [-c] [-l] FILE...'),
     inferrepo=True)
 def annotate(ui, repo, *pats, **opts):
@@ -274,8 +274,12 b' def annotate(ui, repo, *pats, **opts):'
         # to mimic the behavior of Mercurial before version 1.5
         opts['file'] = True
 
+    fm = ui.formatter('annotate', opts)
     datefunc = ui.quiet and util.shortdate or util.datestr
-    hexfn = ui.debugflag and hex or short
+    if fm or ui.debugflag:
+        hexfn = hex
+    else:
+        hexfn = short
 
     opmap = [('user', ' ', lambda x: x[0].user(), ui.shortuser),
              ('number', ' ', lambda x: x[0].rev(), str),
@@ -284,6 +288,7 b' def annotate(ui, repo, *pats, **opts):'
              ('file', ' ', lambda x: x[0].path(), str),
              ('line_number', ':', lambda x: x[1], str),
             ]
+    fieldnamemap = {'number': 'rev', 'changeset': 'node'}
 
     if (not opts.get('user') and not opts.get('changeset')
         and not opts.get('date') and not opts.get('file')):
@@ -293,11 +298,17 b' def annotate(ui, repo, *pats, **opts):'
     if linenumber and (not opts.get('changeset')) and (not opts.get('number')):
         raise util.Abort(_('at least one of -n/-c is required for -l'))
 
-    def makefunc(get, fmt):
-        return lambda x: fmt(get(x))
+    if fm:
+        def makefunc(get, fmt):
+            return get
+    else:
+        def makefunc(get, fmt):
+            return lambda x: fmt(get(x))
     funcmap = [(makefunc(get, fmt), sep) for op, sep, get, fmt in opmap
                if opts.get(op)]
     funcmap[0] = (funcmap[0][0], '') # no separator in front of first column
+    fields = ' '.join(fieldnamemap.get(op, op) for op, sep, get, fmt in opmap
+                      if opts.get(op))
 
     def bad(x, y):
         raise util.Abort("%s: %s" % (x, y))
@@ -310,7 +321,7 b' def annotate(ui, repo, *pats, **opts):'
     for abs in ctx.walk(m):
         fctx = ctx[abs]
         if not opts.get('text') and util.binary(fctx.data()):
-            ui.write(_("%s: binary file\n") % ((pats and m.rel(abs)) or abs))
+            fm.plain(_("%s: binary file\n") % ((pats and m.rel(abs)) or abs))
             continue
 
         lines = fctx.annotate(follow=follow, linenumber=linenumber,
@@ -321,17 +332,23 b' def annotate(ui, repo, *pats, **opts):'
         for f, sep in funcmap:
             l = [f(n) for n, dummy in lines]
             if l:
-                sizes = [encoding.colwidth(x) for x in l]
-                ml = max(sizes)
-                formats.append([sep + ' ' * (ml - w) + '%s' for w in sizes])
+                if fm:
+                    formats.append(['%s' for x in l])
+                else:
+                    sizes = [encoding.colwidth(x) for x in l]
+                    ml = max(sizes)
+                    formats.append([sep + ' ' * (ml - w) + '%s' for w in sizes])
                 pieces.append(l)
 
         for f, p, l in zip(zip(*formats), zip(*pieces), lines):
-            ui.write("".join(f) % p)
-            ui.write(": %s" % l[1])
+            fm.startitem()
+            fm.write(fields, "".join(f), *p)
+            fm.write('line', ": %s", l[1])
 
         if lines and not lines[-1][1].endswith('\n'):
-            ui.write('\n')
+            fm.plain('\n')
+
+    fm.end()
 
 @command('archive',
     [('', 'no-decode', None, _('do not pass files through decoders')),

tests/test-annotate.t

@@ -51,6 +51,29 b' annotate -cdnul'
   $ hg annotate -cdnul a
   nobody 0 8435f90966e4 Thu Jan 01 00:00:01 1970 +0000:1: a
 
+annotate (JSON)
+
+  $ hg annotate -Tjson a
+  [
+   {
+    "line": "a\n",
+    "rev": 0
+   }
+  ]
+
+  $ hg annotate -Tjson -cdfnul a
+  [
+   {
+    "date": [1.0, 0],
+    "file": "a",
+    "line": "a\n",
+    "line_number": 1,
+    "node": "8435f90966e442695d2ded29fdade2bac5ad8065",
+    "rev": 0,
+    "user": "nobody"
+   }
+  ]
+
   $ cat <<EOF >>a
   > a
   > a

tests/test-completion.t

@@ -198,7 +198,7 b' Show an error if we use --options with a'
 Show all commands + options
   $ hg debugcommands
   add: include, exclude, subrepos, dry-run
-  annotate: rev, follow, no-follow, text, user, file, date, number, changeset, line-number, ignore-all-space, ignore-space-change, ignore-blank-lines, include, exclude
+  annotate: rev, follow, no-follow, text, user, file, date, number, changeset, line-number, ignore-all-space, ignore-space-change, ignore-blank-lines, include, exclude, template
   clone: noupdate, updaterev, rev, branch, pull, uncompressed, ssh, remotecmd, insecure
   commit: addremove, close-branch, amend, secret, edit, include, exclude, message, logfile, date, user, subrepos
   diff: rev, change, text, git, nodates, show-function, reverse, ignore-all-space, ignore-space-change, ignore-blank-lines, unified, stat, include, exclude, subrepos