docs: describe pre-rebase hook

diff --git a/t/t4127-apply-same-fn.sh b/t/t4127-apply-same-fn.sh
index 2a6ed77c658423c01c1713eab194ccb86b25c476..3a8202ea9311b1c90158ad0d115dda985060fdeb 100755 (executable)
--- a/t/t4127-apply-same-fn.sh
+++ b/t/t4127-apply-same-fn.sh
@@ -4,6 +4,11 @@ test_description='apply same filename'
 
 . ./test-lib.sh
 
+modify () {
+       sed -e "$1" < "$2" > "$2".x &&
+       mv "$2".x "$2"
+}
+
 test_expect_success setup '
        for i in a b c d e f g h i j k l m
        do
@@ -14,37 +19,37 @@ test_expect_success setup '
        git commit -m initial
 '
 test_expect_success 'apply same filename with independent changes' '
-       sed -i -e "s/^d/z/" same_fn &&
+       modify "s/^d/z/" same_fn &&
        git diff > patch0 &&
        git add same_fn &&
-       sed -i -e "s/^i/y/" same_fn &&
+       modify "s/^i/y/" same_fn &&
        git diff >> patch0 &&
        cp same_fn same_fn2 &&
        git reset --hard &&
-       git-apply patch0 &&
+       git apply patch0 &&
        diff same_fn same_fn2
 '
 
 test_expect_success 'apply same filename with overlapping changes' '
        git reset --hard
-       sed -i -e "s/^d/z/" same_fn &&
+       modify "s/^d/z/" same_fn &&
        git diff > patch0 &&
        git add same_fn &&
-       sed -i -e "s/^e/y/" same_fn &&
+       modify "s/^e/y/" same_fn &&
        git diff >> patch0 &&
        cp same_fn same_fn2 &&
        git reset --hard &&
-       git-apply patch0 &&
+       git apply patch0 &&
        diff same_fn same_fn2
 '
 
 test_expect_success 'apply same new filename after rename' '
        git reset --hard
        git mv same_fn new_fn
-       sed -i -e "s/^d/z/" new_fn &&
+       modify "s/^d/z/" new_fn &&
        git add new_fn &&
        git diff -M --cached > patch1 &&
-       sed -i -e "s/^e/y/" new_fn &&
+       modify "s/^e/y/" new_fn &&
        git diff >> patch1 &&
        cp new_fn new_fn2 &&
        git reset --hard &&
@@ -55,11 +60,11 @@ test_expect_success 'apply same new filename after rename' '
 test_expect_success 'apply same old filename after rename -- should fail.' '
        git reset --hard
        git mv same_fn new_fn
-       sed -i -e "s/^d/z/" new_fn &&
+       modify "s/^d/z/" new_fn &&
        git add new_fn &&
        git diff -M --cached > patch1 &&
        git mv new_fn same_fn
-       sed -i -e "s/^e/y/" same_fn &&
+       modify "s/^e/y/" same_fn &&
        git diff >> patch1 &&
        git reset --hard &&
        test_must_fail git apply patch1
@@ -68,15 +73,15 @@ test_expect_success 'apply same old filename after rename -- should fail.' '
 test_expect_success 'apply A->B (rename), C->A (rename), A->A -- should pass.' '
        git reset --hard
        git mv same_fn new_fn
-       sed -i -e "s/^d/z/" new_fn &&
+       modify "s/^d/z/" new_fn &&
        git add new_fn &&
        git diff -M --cached > patch1 &&
        git commit -m "a rename" &&
        git mv other_fn same_fn
-       sed -i -e "s/^e/y/" same_fn &&
+       modify "s/^e/y/" same_fn &&
        git add same_fn &&
        git diff -M --cached >> patch1 &&
-       sed -i -e "s/^g/x/" same_fn &&
+       modify "s/^g/x/" same_fn &&
        git diff >> patch1 &&
        git reset --hard HEAD^ &&
        git apply patch1