[PATCH 2/2] gitk: escape file paths before piping to git log

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From: Nico Rieck <nico.rieck@xxxxxxxxx>

We just started piping the file paths via `stdin` instead of passing
them via the command-line, to avoid running into command-line
limitations.

However, since we now pipe the file paths, we need to take care of
special characters.

This fixes https://github.com/git-for-windows/git/issues/2293

Signed-off-by: Nico Rieck <nico.rieck@xxxxxxxxx>
Signed-off-by: Johannes Schindelin <johannes.schindelin@xxxxxx>
---
 gitk | 16 ++++++++++++++--
 1 file changed, 14 insertions(+), 2 deletions(-)

diff --git a/gitk b/gitk
index 92375ca6a2a..df3ba2ea99b 100755
--- a/gitk
+++ b/gitk
@@ -353,6 +353,16 @@ proc parseviewrevs {view revs} {
     return $ret
 }
 
+# Escapes a list of filter paths to be passed to git log via stdin. Note that
+# paths must not be quoted.
+proc escape_filter_paths {paths} {
+	set escaped [list]
+	foreach path $paths {
+		lappend escaped [string map {\\ \\\\ "\ " "\\\ "} $path]
+	}
+	return $escaped
+}
+
 # Start off a git log process and arrange to read its output
 proc start_rev_list {view} {
     global startmsecs commitidx viewcomplete curview
@@ -414,7 +424,8 @@ proc start_rev_list {view} {
     if {[catch {
         set fd [open [concat | git log --no-color -z --pretty=raw $show_notes \
                         --parents --boundary $args --stdin \
-                        "<<[join [concat $revs "--" $files] "\\n"]"] r]
+                        "<<[join [concat $revs "--" \
+                                [escape_filter_paths $files]] "\\n"]"] r]
     } err]} {
         error_popup "[mc "Error executing git log:"] $err"
         return 0
@@ -568,7 +579,8 @@ proc updatecommits {} {
         set fd [open [concat | git log --no-color -z --pretty=raw $show_notes \
                         --parents --boundary $args --stdin \
                         "<<[join [concat $revs "--" \
-                                $vfilelimit($view)] "\\n"]"] r]
+                                [escape_filter_paths \
+                                        $vfilelimit($view)]] "\\n"]"] r]
     } err]} {
         error_popup "[mc "Error executing git log:"] $err"
         return
-- 
gitgitgadget



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