merge(third_party/git): Merge squashed git subtree at v2.23.0

Merge commit '1b593e1ea4' as 'third_party/git'

third_party/git/ci/util/extract-trash-dirs.sh

@@ -0,0 +1,50 @@
+#!/bin/sh
+
+error () {
+	echo >&2 "error: $@"
+	exit 1
+}
+
+find_embedded_trash () {
+	while read -r line
+	do
+		case "$line" in
+		*Start\ of\ trash\ directory\ of\ \'t[0-9][0-9][0-9][0-9]-*\':*)
+			test_name="${line#*\'}"
+			test_name="${test_name%\'*}"
+
+			return 0
+		esac
+	done
+
+	return 1
+}
+
+extract_embedded_trash () {
+	while read -r line
+	do
+		case "$line" in
+		*End\ of\ trash\ directory\ of\ \'$test_name\'*)
+			return
+			;;
+		*)
+			printf '%s\n' "$line"
+			;;
+		esac
+	done
+
+	error "unexpected end of input"
+}
+
+# Raw logs from Linux build jobs have CRLF line endings, while OSX
+# build jobs mostly have CRCRLF, except an odd line every now and
+# then that has CRCRCRLF.  'base64 -d' from 'coreutils' doesn't like
+# CRs and complains about "invalid input", so remove all CRs at the
+# end of lines.
+sed -e 's/\r*$//' | \
+while find_embedded_trash
+do
+	echo "Extracting trash directory of '$test_name'"
+
+	extract_embedded_trash |base64 -d |tar xzp
+done