Patchwork [V2,STABLE] hgweb: refresh hgweb.repo on phase change (issue4061)

# HG changeset patch
# User Anton Shestakov <engored@ya.ru>
# Date 1411822795 -32400
#      Sat Sep 27 21:59:55 2014 +0900
# Branch stable
# Node ID ba0f310dff74d469c1449337f76b2d0898ef48d1
# Parent  6e1fbcb18a75e9cc7d3a88ec9461aa31fac6e3ad
hgweb: refresh hgweb.repo on phase change (issue4061)

Make hgweb.refresh() also look at phaseroots file (in addition to 00changelog.i
file) and reload the repo when os.stat returns different mtime or size than
cached, signifying the file was modified.

This way if user changes phase of a changeset (secret <-> draft), there's no
need to restart hg serve to see the change.

On Sun, Sep 28, 2014 at 07:55:15PM +0900, Anton Shestakov wrote:
> # HG changeset patch
> # User Anton Shestakov <engored@ya.ru>
> # Date 1411822795 -32400
> #      Sat Sep 27 21:59:55 2014 +0900
> # Branch stable
> # Node ID ba0f310dff74d469c1449337f76b2d0898ef48d1
> # Parent  6e1fbcb18a75e9cc7d3a88ec9461aa31fac6e3ad
> hgweb: refresh hgweb.repo on phase change (issue4061)

This was pushed as a111e460318a.

>
> Make hgweb.refresh() also look at phaseroots file (in addition to 00changelog.i
> file) and reload the repo when os.stat returns different mtime or size than
> cached, signifying the file was modified.
>
> This way if user changes phase of a changeset (secret <-> draft), there's no
> need to restart hg serve to see the change.
>
> diff --git a/mercurial/hgweb/common.py b/mercurial/hgweb/common.py
> --- a/mercurial/hgweb/common.py
> +++ b/mercurial/hgweb/common.py
> @@ -112,9 +112,9 @@
>  def statusmessage(code, message=None):
>      return '%d %s' % (code, message or _statusmessage(code))
>
> -def get_stat(spath):
> -    """stat changelog if it exists, spath otherwise"""
> -    cl_path = os.path.join(spath, "00changelog.i")
> +def get_stat(spath, fn="00changelog.i"):
> +    """stat fn (00changelog.i by default) if it exists, spath otherwise"""
> +    cl_path = os.path.join(spath, fn)
>      if os.path.exists(cl_path):
>          return os.stat(cl_path)
>      else:
> diff --git a/mercurial/hgweb/hgweb_mod.py b/mercurial/hgweb/hgweb_mod.py
> --- a/mercurial/hgweb/hgweb_mod.py
> +++ b/mercurial/hgweb/hgweb_mod.py
> @@ -71,8 +71,8 @@
>          r.baseui.setconfig('ui', 'nontty', 'true', 'hgweb')
>          self.repo = r
>          hook.redirect(True)
> +        self.repostate = ((-1, -1), (-1, -1))
>          self.mtime = -1
> -        self.size = -1
>          self.reponame = name
>          self.archives = 'zip', 'gz', 'bz2'
>          self.stripecount = 1
> @@ -107,9 +107,12 @@
>
>      def refresh(self, request=None):
>          st = get_stat(self.repo.spath)
> -        # compare changelog size in addition to mtime to catch
> -        # rollbacks made less than a second ago
> -        if st.st_mtime != self.mtime or st.st_size != self.size:
> +        pst = get_stat(self.repo.spath, 'phaseroots')
> +        # changelog mtime and size, phaseroots mtime and size
> +        repostate = ((st.st_mtime, st.st_size), (pst.st_mtime, pst.st_size))
> +        # we need to compare file size in addition to mtime to catch
> +        # changes made less than a second ago
> +        if repostate != self.repostate:
>              r = hg.repository(self.repo.baseui, self.repo.root)
>              self.repo = self._getview(r)
>              self.maxchanges = int(self.config("web", "maxchanges", 10))
> @@ -121,8 +124,9 @@
>              encoding.encoding = self.config("web", "encoding",
>                                              encoding.encoding)
>              # update these last to avoid threads seeing empty settings
> +            self.repostate = repostate
> +            # mtime is needed for ETag
>              self.mtime = st.st_mtime
> -            self.size = st.st_size
>          if request:
>              self.repo.ui.environ = request.env
>
> diff --git a/tests/test-hgweb.t b/tests/test-hgweb.t
> --- a/tests/test-hgweb.t
> +++ b/tests/test-hgweb.t
> @@ -531,6 +531,50 @@
>    304 Not Modified
>
>
> +phase changes are refreshed (issue4061)
> +
> +  $ echo bar >> foo
> +  $ hg ci -msecret --secret
> +  $ "$TESTDIR/get-with-headers.py" localhost:$HGPORT 'log?style=raw'
> +  200 Script output follows
> +
> +
> +  # HG changelog
> +  # Node ID 2ef0ac749a14e4f57a5a822464a0902c6f7f448f
> +
> +  changeset:   2ef0ac749a14e4f57a5a822464a0902c6f7f448f
> +  revision:    0
> +  user:        test
> +  date:        Thu, 01 Jan 1970 00:00:00 +0000
> +  summary:     base
> +  branch:      default
> +  tag:         tip
> +
> +
> +  $ hg phase --draft tip
> +  $ "$TESTDIR/get-with-headers.py" localhost:$HGPORT 'log?style=raw'
> +  200 Script output follows
> +
> +
> +  # HG changelog
> +  # Node ID a084749e708a9c4c0a5b652a2a446322ce290e04
> +
> +  changeset:   a084749e708a9c4c0a5b652a2a446322ce290e04
> +  revision:    1
> +  user:        test
> +  date:        Thu, 01 Jan 1970 00:00:00 +0000
> +  summary:     secret
> +  branch:      default
> +  tag:         tip
> +
> +  changeset:   2ef0ac749a14e4f57a5a822464a0902c6f7f448f
> +  revision:    0
> +  user:        test
> +  date:        Thu, 01 Jan 1970 00:00:00 +0000
> +  summary:     base
> +
> +
> +
>  errors
>
>    $ cat errors.log
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