git-gui: Convert merge dialog to use class system

diff --git a/lib/commit.tcl b/lib/commit.tcl
index dc7c88c6017bcb390c599f8b904ad3e7c31cc7d2..0f3b16dfeb05e4451df3204e94106c0c7b53cbc4 100644 (file)
--- a/lib/commit.tcl
+++ b/lib/commit.tcl
@@ -209,7 +209,7 @@ A good commit message has the following format:
        ui_status {Calling pre-commit hook...}
        set pch_error {}
        set fd_ph [open "| $pchook" r]
-       fconfigure $fd_ph -blocking 0 -translation binary
+       fconfigure $fd_ph -blocking 0 -translation binary -eofchar {}
        fileevent $fd_ph readable \
                [list commit_prehook_wait $fd_ph $curHEAD $msg]
 }
@@ -258,7 +258,18 @@ proc commit_committree {fd_wt curHEAD msg} {
        # -- Verify this wasn't an empty change.
        #
        if {$commit_type eq {normal}} {
-               set old_tree [git rev-parse "$PARENT^{tree}"]
+               set fd_ot [git_read cat-file commit $PARENT]
+               fconfigure $fd_ot -encoding binary -translation lf
+               set old_tree [gets $fd_ot]
+               close $fd_ot
+
+               if {[string equal -length 5 {tree } $old_tree]
+                       && [string length $old_tree] == 45} {
+                       set old_tree [string range $old_tree 5 end]
+               } else {
+                       error "Commit $PARENT appears to be corrupt"
+               }
+
                if {$tree_id eq $old_tree} {
                        info_popup {No changes to commit.