Date: Wed, 6 Aug 2014 20:43:46 +0200

The number of loose objects at which git-gui shows a gc warning has
historically been hardcoded to ~2000, or ~200 on Windows. The warning can
only be disabled completely via gui.gcwarning=false.

Especially on Windows, the hardcoded threshold is so ridiculously low that
git-gui often complains even immediately after gc (due to loose objects
only referenced by the reflog).

'git gc --auto' uses a much bigger threshold to check if gc is necessary.
Additionally, the value can be configured via gc.auto (default 6700).
There's no special case for Windows.

Change git-gui so that it only warns if 'git gc --auto' would also do an
automatic gc, i.e.:
 - calculate the threshold from the gc.auto setting (default 6700,
   disabled if <= 0)
 - check directory .git/objects/17

We still check four directories (14-17) if gc.auto is very small, to get a
better estimate.

Signed-off-by: Karsten Blees <bl...@dcon.de>
---
 git-gui/lib/database.tcl | 17 ++++++++++++-----
 1 file changed, 12 insertions(+), 5 deletions(-)

diff --git a/git-gui/lib/database.tcl b/git-gui/lib/database.tcl
index 1f187ed..212b195 100644
--- a/git-gui/lib/database.tcl
+++ b/git-gui/lib/database.tcl
@@ -89,19 +89,26 @@ proc do_fsck_objects {} {
 }
 
 proc hint_gc {} {
+       global repo_config
+       set auto_gc $repo_config(gc.auto)
+       if {$auto_gc eq {}} {
+               set auto_gc 6700
+       } elseif {$auto_gc <= 0} {
+               return
+       }
+
        set ndirs 1
-       set limit 8
-       if {[is_Windows]} {
+       set limit [expr {($auto_gc + 255) / 256}]
+       if {$limit < 4} {
                set ndirs 4
-               set limit 1
        }
 
        set count [llength [glob \
                -nocomplain \
                -- \
-               [gitdir objects 4\[0-[expr {$ndirs-1}]\]/*]]]
+               [gitdir objects 1\[[expr {8-$ndirs}]-7\]/*]]]
 
-       if {$count >= $limit * $ndirs} {
+       if {$count > $limit * $ndirs} {
                set objects_current [expr {$count * 256/$ndirs}]
                if {[ask_popup \
                        [mc "This repository currently has approximately %i 
loose objects.
-- 
2.4.1.windows.1

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