git-gui: maintain backwards compatibility for merge syntax

Commit b5f325c updated to use the newer merge syntax but continue to
support older versions of git.

Signed-off-by: Pat Thoyts <patthoyts@users.sourceforge.net>

diff --git a/lib/merge.tcl b/lib/merge.tcl
index 2b10a983898c8d918a68f2fbb70c9d3973de2797..9f253db5b37e5633c19914248a58a3f2feb3c512 100644 (file)
--- a/lib/merge.tcl
+++ b/lib/merge.tcl
@@ -112,7 +112,16 @@ method _start {} {
        close $fh
        set _last_merged_branch $branch
 
-       set cmd [list git merge --strategy=recursive FETCH_HEAD]
+       if {[git-version >= "2.5.0"]} {
+               set cmd [list git merge --strategy=recursive FETCH_HEAD]
+       } else {
+               set cmd [list git]
+               lappend cmd merge
+               lappend cmd --strategy=recursive
+               lappend cmd [git fmt-merge-msg <[gitdir FETCH_HEAD]]
+               lappend cmd HEAD
+               lappend cmd $name
+       }
 
        ui_status [mc "Merging %s and %s..." $current_branch $stitle]
        set cons [console::new [mc "Merge"] "merge $stitle"]