add annex-ignore-command and annex-sync-command configs

Added remote configuration settings annex-ignore-command and
annex-sync-command, which are dynamic equivilants of the annex-ignore
and annex-sync configurations.

For this I needed a new DynamicConfig infrastructure. Its implementation
should be as fast as before when there is no dynamic config, and it caches
so shell commands are only run once.

Note that annex-ignore-command exits nonzero when the remote should be ignored.
While that may seem backwards, it allows using the same command for it as
for annex-sync-command when you want to disable both.

This commit was sponsored by Trenton Cronholm on Patreon.

1 files changed, 3 insertions, 3 deletions

diff --git a/CHANGELOG b/CHANGELOG
index b2c8f6229..6bef5110b 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -15,9 +15,9 @@ git-annex (6.20170521) UNRELEASED; urgency=medium
     an url to check if it exists. Some web servers take quite a long time
     to answer a HEAD request.
   * Windows: Win32 package has subsumed Win32-extras; update dependency.
-  * Added annex-check-command configuration, which can be used to
-    provide a shell command to check if a remote should be allowed to be
-    used at all.
+  * Added remote configuration settings annex-ignore-command and
+    annex-sync-command, which are dynamic equivilants of the annex-ignore
+    and annex-sync configurations.
 
  -- Joey Hess <id@joeyh.name>  Sat, 17 Jun 2017 13:02:24 -0400