test-lib-functions: move function to lib-bitmap.sh

Move a function added to test-lib-functions.sh in ea047a8 (t5310:
factor out bitmap traversal comparison, 2020-02-14) into a new
lib-bitmap.sh.

The test-lib-functions.sh file should be for functions that are widely
used across the test suite, if something's only used by a few tests it
makes more sense to have it in a lib-*.sh file.

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

Author: avar

t/lib-bitmap.sh

@@ -0,0 +1,26 @@
+# Compare a file containing rev-list bitmap traversal output to its non-bitmap
+# counterpart. You can't just use test_cmp for this, because the two produce
+# subtly different output:
+#
+#   - regular output is in traversal order, whereas bitmap is split by type,
+#     with non-packed objects at the end
+#
+#   - regular output has a space and the pathname appended to non-commit
+#     objects; bitmap output omits this
+#
+# This function normalizes and compares the two. The second file should
+# always be the bitmap output.
+test_bitmap_traversal () {
+	if test "$1" = "--no-confirm-bitmaps"
+	then
+		shift
+	elif cmp "$1" "$2"
+	then
+		echo >&2 "identical raw outputs; are you sure bitmaps were used?"
+		return 1
+	fi &&
+	cut -d' ' -f1 "$1" | sort >"$1.normalized" &&
+	sort "$2" >"$2.normalized" &&
+	test_cmp "$1.normalized" "$2.normalized" &&
+	rm -f "$1.normalized" "$2.normalized"
+}

t/t5310-pack-bitmaps.sh

@@ -5,6 +5,8 @@ GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=master
 export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
 
 . ./test-lib.sh
+. "$TEST_DIRECTORY"/lib-bundle.sh
+. "$TEST_DIRECTORY"/lib-bitmap.sh
 
 objpath () {
 	echo ".git/objects/$(echo "$1" | sed -e 's|\(..\)|\1/|')"

t/t6113-rev-list-bitmap-filters.sh

@@ -2,6 +2,7 @@
 
 test_description='rev-list combining bitmaps and filters'
 . ./test-lib.sh
+. "$TEST_DIRECTORY"/lib-bitmap.sh
 
 test_expect_success 'set up bitmapped repo' '
 	# one commit will have bitmaps, the other will not

t/test-lib-functions.sh

@@ -1602,33 +1602,6 @@ test_set_port () {
 	eval $var=$port
 }
 
-# Compare a file containing rev-list bitmap traversal output to its non-bitmap
-# counterpart. You can't just use test_cmp for this, because the two produce
-# subtly different output:
-#
-#   - regular output is in traversal order, whereas bitmap is split by type,
-#     with non-packed objects at the end
-#
-#   - regular output has a space and the pathname appended to non-commit
-#     objects; bitmap output omits this
-#
-# This function normalizes and compares the two. The second file should
-# always be the bitmap output.
-test_bitmap_traversal () {
-	if test "$1" = "--no-confirm-bitmaps"
-	then
-		shift
-	elif cmp "$1" "$2"
-	then
-		echo >&2 "identical raw outputs; are you sure bitmaps were used?"
-		return 1
-	fi &&
-	cut -d' ' -f1 "$1" | sort >"$1.normalized" &&
-	sort "$2" >"$2.normalized" &&
-	test_cmp "$1.normalized" "$2.normalized" &&
-	rm -f "$1.normalized" "$2.normalized"
-}
-
 # Tests for the hidden file attribute on Windows
 test_path_is_hidden () {
 	test_have_prereq MINGW ||