Allow UseDelta option to specify a delta ratio

Rework the frontend and backend to allow passing a ratio value in for
UseDelta rather than having a hardcoded #define-d 0.7 value always used.
This is useful for those with fast connections, who would likely benefit
from tuning this ratio to lower values; it is also useful for general
testing purposes.

The libalpm API changes for this, but we do support the old config file
format with a no-value 'UseDelta' option; in this case we simply use the
old default of 0.7.

We clamp the ratio values to a sane range between 0.0 and 2.0, allowing
ratios above 1.0 for testing purposes.

Signed-off-by: Dan McGee <dan@archlinux.org>

1 files changed, 1 insertions, 1 deletions

diff --git a/etc/pacman.conf.in b/etc/pacman.conf.in
index 932140f4..7f9db1b5 100644
--- a/etc/pacman.conf.in
+++ b/etc/pacman.conf.in
@@ -20,6 +20,7 @@ SyncFirst   = pacman
 #XferCommand = /usr/bin/curl -C - -f %u > %o
 #XferCommand = /usr/bin/wget --passive-ftp -c -O %o %u
 #CleanMethod = KeepInstalled
+#UseDelta    = 0.7
 Architecture = auto
 
 # Pacman won't upgrade packages listed in IgnorePkg and members of IgnoreGroup
@@ -31,7 +32,6 @@ Architecture = auto
 
 # Misc options
 #UseSyslog
-#UseDelta
 #TotalDownload
 CheckSpace
 #VerbosePkgLists