checkout: implement "-" abbreviation, add docs and tests

diff --git a/t/diff-lib.sh b/t/diff-lib.sh
index 7dc6d7eb1e13a1831b61c70269ce593457badf0c..4bddeb591ecc17ec532164d0d6cf1ad1a54eb996 100644 (file)
--- a/t/diff-lib.sh
+++ b/t/diff-lib.sh
@@ -11,7 +11,7 @@ compare_diff_raw () {
 
     sed -e "$sanitize_diff_raw" <"$1" >.tmp-1
     sed -e "$sanitize_diff_raw" <"$2" >.tmp-2
-    git diff .tmp-1 .tmp-2 && rm -f .tmp-1 .tmp-2
+    test_cmp .tmp-1 .tmp-2 && rm -f .tmp-1 .tmp-2
 }
 
 sanitize_diff_raw_z='/^:/s/ '"$_x40"' '"$_x40"' \([A-Z]\)[0-9]*$/ X X \1#/'
@@ -21,9 +21,9 @@ compare_diff_raw_z () {
     # Also we do not check SHA1 hash generation in this test, which
     # is a job for t0000-basic.sh
 
-    tr '\000' '\012' <"$1" | sed -e "$sanitize_diff_raw_z" >.tmp-1
-    tr '\000' '\012' <"$2" | sed -e "$sanitize_diff_raw_z" >.tmp-2
-    git diff .tmp-1 .tmp-2 && rm -f .tmp-1 .tmp-2
+    perl -pe 'y/\000/\012/' <"$1" | sed -e "$sanitize_diff_raw_z" >.tmp-1
+    perl -pe 'y/\000/\012/' <"$2" | sed -e "$sanitize_diff_raw_z" >.tmp-2
+    test_cmp .tmp-1 .tmp-2 && rm -f .tmp-1 .tmp-2
 }
 
 compare_diff_patch () {
@@ -37,5 +37,5 @@ compare_diff_patch () {
        /^[dis]*imilarity index [0-9]*%$/d
        /^index [0-9a-f]*\.\.[0-9a-f]/d
     ' <"$2" >.tmp-2
-    git diff .tmp-1 .tmp-2 && rm -f .tmp-1 .tmp-2
+    test_cmp .tmp-1 .tmp-2 && rm -f .tmp-1 .tmp-2
 }