[PATCH] Teach gitk to display dirty submodules correctly

[Jens Lehmann <Jens.Lehmann@web.de>]

Since recently "git diff --submodule" prints out extra lines when the
submodule contains untracked or modified files. Show all those lines of
one submodule under the same header.

Also for newly added or removed submodules the submodule name contained
trailing garbage because the extraction of the name was not done right.

Signed-off-by: Jens Lehmann <Jens.Lehmann@web.de>
---

No need to test for the version of the underlying git here, as the
string "Submodule" does not appear in the diff output when older git
versions are used and the changed code is not executed at all in this
case (except for setting the new "currdiffsubmod" variable to the
empty string, but that doesn't have any negative side effects).

 gitk-git/gitk |   29 +++++++++++++++++++++--------
 1 files changed, 21 insertions(+), 8 deletions(-)

diff --git a/gitk-git/gitk b/gitk-git/gitk
index 1f36a3e..36a9dcf 100644
--- a/gitk-git/gitk
+++ b/gitk-git/gitk
@@ -7501,7 +7501,7 @@ proc getblobdiffs {ids} {
     global ignorespace
     global limitdiffs vfilelimit curview
     global diffencoding targetline diffnparents
-    global git_version
+    global git_version currdiffsubmod

     set textconv {}
     if {[package vcompare $git_version "1.6.1"] >= 0} {
@@ -7528,6 +7528,7 @@ proc getblobdiffs {ids} {
     set diffencoding [get_path_encoding {}]
     fconfigure $bdf -blocking 0 -encoding binary -eofchar {}
     set blobdifffd($ids) $bdf
+    set currdiffsubmod ""
     filerun $bdf [list getblobdiffline $bdf $diffids]
 }

@@ -7598,7 +7599,7 @@ proc getblobdiffline {bdf ids} {
     global diffnexthead diffnextnote difffilestart
     global ctext_file_names ctext_file_lines
     global diffinhdr treediffs mergemax diffnparents
-    global diffencoding jump_to_here targetline diffline
+    global diffencoding jump_to_here targetline diffline currdiffsubmod

     set nr 0
     $ctext conf -state normal
@@ -7679,19 +7680,30 @@ proc getblobdiffline {bdf ids} {

 	} elseif {![string compare -length 10 "Submodule " $line]} {
 	    # start of a new submodule
-	    if {[string compare [$ctext get "end - 4c" end] "\n \n\n"]} {
+	    if {[regexp -indices "\[0-9a-f\]+\\.\\." $line nameend]} {
+		set fname [string range $line 10 [expr [lindex $nameend 0] - 2]]
+	    } else {
+		set fname [string range $line 10 [expr [string first "contains " $line] - 2]]
+	    }
+	    if {$currdiffsubmod != $fname} {
 		$ctext insert end "\n";     # Add newline after commit message
 	    }
 	    set curdiffstart [$ctext index "end - 1c"]
 	    lappend ctext_file_names ""
-	    set fname [string range $line 10 [expr [string last " " $line] - 1]]
-	    lappend ctext_file_lines $fname
-	    makediffhdr $fname $ids
-	    $ctext insert end "\n$line\n" filesep
+	    if {$currdiffsubmod != $fname} {
+		lappend ctext_file_lines $fname
+		makediffhdr $fname $ids
+		set currdiffsubmod $fname
+		$ctext insert end "\n$line\n" filesep
+	    } else {
+		$ctext insert end "$line\n" filesep
+	    }
 	} elseif {![string compare -length 3 "  >" $line]} {
+	    set $currdiffsubmod ""
 	    set line [encoding convertfrom $diffencoding $line]
 	    $ctext insert end "$line\n" dresult
 	} elseif {![string compare -length 3 "  <" $line]} {
+	    set $currdiffsubmod ""
 	    set line [encoding convertfrom $diffencoding $line]
 	    $ctext insert end "$line\n" d0
 	} elseif {$diffinhdr} {
@@ -8527,7 +8539,7 @@ proc do_cmp_commits {a b} {
 }

 proc diffcommits {a b} {
-    global diffcontext diffids blobdifffd diffinhdr
+    global diffcontext diffids blobdifffd diffinhdr currdiffsubmod

     set tmpdir [gitknewtmpdir]
     set fna [file join $tmpdir "commit-[string range $a 0 7]"]
@@ -8548,6 +8560,7 @@ proc diffcommits {a b} {
     set diffids [list commits $a $b]
     set blobdifffd($diffids) $fd
     set diffinhdr 0
+    set currdiffsubmod ""
     filerun $fd [list getblobdiffline $fd $diffids]
 }

-- 
1.7.0.2.448.g45e29