hgweb: remove support for short query string based aliases (BC)

hgweb: remove support for short query string based aliases (BC)

Form data exposed by hgweb is post-processed to expand certain
shortcuts. For example, URLs with "?cs=@" is essentially expanded to
"?cmd=changeset&node=@". And the URL router treats this the same
as "/changeset/@".

These shortcuts were initially added in 2005 in 34cb3957d875 and
964baa35faf8. They have rarely been touched in the last decade (just
moving code around a bit).

We have almost no test coverage of this feature. AFAICT no templates
reference URLs of this form. I even looked at the initial version
of paper and coal from ~2008 and they use the "/command/params" URL
form and not these shortcuts.

Furthermore, I couldn't even get some shortcuts to work! For example,
"?sl=@" attempts to do a revision search instead of showing shortlog
starting at revision @. Maybe I'm just doing it wrong?

Because this is ancient, mostly untested code, there is a migration
path to something better, and because anyone passionate enough to
preserve URLs can install URL redirects, let's nuke the feature.

.. bc::

   Query string shorts in hgweb like ``?cs=@`` have been removed. Use
   URLs of the form ``/:cmd`` instead.

Differential Revision: https://phab.mercurial-scm.org/D2773

--- a/mercurial/hgweb/request.py	Sat Mar 10 11:07:53 2018 -0800
+++ b/mercurial/hgweb/request.py	Fri Mar 09 17:10:36 2018 -0800
@@ -27,37 +27,6 @@
     util,
 )
 
-shortcuts = {
-    'cl': [('cmd', ['changelog']), ('rev', None)],
-    'sl': [('cmd', ['shortlog']), ('rev', None)],
-    'cs': [('cmd', ['changeset']), ('node', None)],
-    'f': [('cmd', ['file']), ('filenode', None)],
-    'fl': [('cmd', ['filelog']), ('filenode', None)],
-    'fd': [('cmd', ['filediff']), ('node', None)],
-    'fa': [('cmd', ['annotate']), ('filenode', None)],
-    'mf': [('cmd', ['manifest']), ('manifest', None)],
-    'ca': [('cmd', ['archive']), ('node', None)],
-    'tags': [('cmd', ['tags'])],
-    'tip': [('cmd', ['changeset']), ('node', ['tip'])],
-    'static': [('cmd', ['static']), ('file', None)]
-}
-
-def normalize(form):
-    # first expand the shortcuts
-    for k in shortcuts:
-        if k in form:
-            for name, value in shortcuts[k]:
-                if value is None:
-                    value = form[k]
-                form[name] = value
-            del form[k]
-    # And strip the values
-    bytesform = {}
-    for k, v in form.iteritems():
-        bytesform[pycompat.bytesurl(k)] = [
-            pycompat.bytesurl(i.strip()) for i in v]
-    return bytesform
-
 @attr.s(frozen=True)
 class parsedrequest(object):
     """Represents a parsed WSGI request.
@@ -258,7 +227,7 @@
         self.run_once = wsgienv[r'wsgi.run_once']
         self.env = wsgienv
         self.req = parserequestfromenv(wsgienv, inp)
-        self.form = normalize(self.req.querystringdict)
+        self.form = self.req.querystringdict
         self._start_response = start_response
         self.server_write = None
         self.headers = []

--- a/tests/test-hgweb-raw.t	Sat Mar 10 11:07:53 2018 -0800
+++ b/tests/test-hgweb-raw.t	Fri Mar 09 17:10:36 2018 -0800
@@ -17,7 +17,7 @@
   $ hg serve -p $HGPORT -A access.log -E error.log -d --pid-file=hg.pid
 
   $ cat hg.pid >> $DAEMON_PIDS
-  $ (get-with-headers.py localhost:$HGPORT '?f=bf0ff59095c9;file=sub/some%20text%25.txt;style=raw' content-type content-length content-disposition) >getoutput.txt
+  $ (get-with-headers.py localhost:$HGPORT 'raw-file/bf0ff59095c9/sub/some%20text%25.txt' content-type content-length content-disposition) >getoutput.txt
 
   $ killdaemons.py hg.pid
 
@@ -32,14 +32,14 @@
   It is very boring to read, but computers don't
   care about things like that.
   $ cat access.log error.log
-  $LOCALIP - - [*] "GET /?f=bf0ff59095c9;file=sub/some%20text%25.txt;style=raw HTTP/1.1" 200 - (glob)
+  $LOCALIP - - [$LOGDATE$] "GET /raw-file/bf0ff59095c9/sub/some%20text%25.txt HTTP/1.1" 200 - (glob)
 
   $ rm access.log error.log
   $ hg serve -p $HGPORT -A access.log -E error.log -d --pid-file=hg.pid \
   > --config web.guessmime=True
 
   $ cat hg.pid >> $DAEMON_PIDS
-  $ (get-with-headers.py localhost:$HGPORT '?f=bf0ff59095c9;file=sub/some%20text%25.txt;style=raw' content-type content-length content-disposition) >getoutput.txt
+  $ (get-with-headers.py localhost:$HGPORT 'raw-file/bf0ff59095c9/sub/some%20text%25.txt' content-type content-length content-disposition) >getoutput.txt
   $ killdaemons.py hg.pid
 
   $ cat getoutput.txt
@@ -53,6 +53,6 @@
   It is very boring to read, but computers don't
   care about things like that.
   $ cat access.log error.log
-  $LOCALIP - - [*] "GET /?f=bf0ff59095c9;file=sub/some%20text%25.txt;style=raw HTTP/1.1" 200 - (glob)
+  $LOCALIP - - [$LOGDATE$] "GET /raw-file/bf0ff59095c9/sub/some%20text%25.txt HTTP/1.1" 200 - (glob)
 
   $ cd ..