diff tests/test-help.t @ 27738:a0e783d26e81

exchange: make clone bundles non-experimental and enabled by default

The clone bundles feature was introduced in Mercurial 3.6 behind an
experimental and disabled by default flag. The feature has been enabled
on hg.mozilla.org for a few months and has served many terabytes of
clones. Users have been encouraged to use the feature and reception
has been very positive (mainly due to faster clones as a result of
connecting to a CDN). I have heard no feedback about changing the
feature other than inquiries about when it will be enabled by default.
So, I think the feature is ready to be enabled by default.

This patch renames experimental.clonebundles to ui.clonebundles,
documents the option, and enables it by default. References to the
experimental state of clone bundles have been removed. The remaining
config option docs in clonebundles.py have been removed because they
are redudant with `hg help config`.

There are some oddities with behavior of clone bundles. Because clones
with clone bundles are effectively 2 `hg pull` operations, there may be
2 transactions. This could result in hooks running twice. If the
subsequent pull is aborted, it could result in partial rollback and an
incomplete clone. This behavior is a bit wonky and should probably
be documented. If this patch is accepted, I'll send a follow-up to
document it. I don't think this behavior should prevent the feature
being enabled by default. Reworking the clone mechanism to support
interrupted or multi-part clones feels like a major new feature and
something that when implemented can change the hook and rollback
semantics of clone bundles. Besides, partial clone is better than
full rollback and hooks running on initial clone are likely rare, so I
think the impact is minimal.

--- a/tests/test-help.t	Fri Jan 08 10:57:01 2016 -0800
+++ b/tests/test-help.t	Fri Jan 08 10:58:04 2016 -0800
@@ -252,7 +252,6 @@
        censor        erase file content at a given revision
        churn         command to display statistics about repository history
        clonebundles  advertise pre-generated bundles to seed clones
-                     (experimental)
        color         colorize output from some commands
        convert       import revisions from foreign VCS repositories into
                      Mercurial
@@ -1309,7 +1308,7 @@
   
   Extensions:
   
-   clonebundles advertise pre-generated bundles to seed clones (experimental)
+   clonebundles advertise pre-generated bundles to seed clones
    prefixedname matched against word "clone"
    relink       recreates hardlinks between repository clones