git/t/t4107-apply-ignore-whitespace.sh
René Scharfe 4855de1233 apply: update line lengths for --inaccurate-eof
Some diff implementations don't report missing newlines at the end of
files.  Applying such a patch can cause a newline character to be
added inadvertently.  The option --inaccurate-eof of git apply can be
used to remove trailing newlines if needed.

apply_one_fragment() cuts it off from the buffers for preimage and
postimage.  Before it does, it builds an array with the lengths of each
line for both.  Make sure to update the length of the last line in
these line info structures as well to keep them consistent with their
respective buffer.

Without this fix the added test fails; git apply dies and reports:

   fatal: BUG: caller miscounted postlen: asked 1, orig = 1, used = 2

That sanity check is only called if whitespace changes are ignored.

Reported-by: Mahmoud Al-Qudsi <mqudsi@neosmart.net>
Signed-off-by: Rene Scharfe <l.s.r@web.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-11-17 10:42:08 +09:00

195 lines
4 KiB
Bash
Executable file

#!/bin/sh
#
# Copyright (c) 2009 Giuseppe Bilotta
#
test_description='git-apply --ignore-whitespace.
'
. ./test-lib.sh
# This primes main.c file that indents without using HT at all.
# Various patches with HT and other spaces are attempted in the test.
cat > patch1.patch <<\EOF
diff --git a/main.c b/main.c
new file mode 100644
--- /dev/null
+++ b/main.c
@@ -0,0 +1,22 @@
+#include <stdio.h>
+
+void print_int(int num);
+int func(int num);
+
+int main() {
+ int i;
+
+ for (i = 0; i < 10; i++) {
+ print_int(func(i)); /* stuff */
+ }
+
+ return 0;
+}
+
+int func(int num) {
+ return num * num;
+}
+
+void print_int(int num) {
+ printf("%d", num);
+}
EOF
# Since whitespace is very significant and we want to prevent whitespace
# mangling when creating this test from a patch, we protect 'fixable'
# whitespace by replacing spaces with Z and replacing them at patch
# creation time, hence the sed trick.
# This patch will fail unless whitespace differences are being ignored
sed -e 's/Z/ /g' > patch2.patch <<\EOF
diff --git a/main.c b/main.c
--- a/main.c
+++ b/main.c
@@ -10,6 +10,8 @@
Z print_int(func(i)); /* stuff */
Z }
Z
+ printf("\n");
+
Z return 0;
Z}
Z
EOF
# This patch will fail even if whitespace differences are being ignored,
# because of the missing string at EOL. TODO: this testcase should be
# improved by creating a line that has the same hash with and without
# the final string.
sed -e 's/Z/ /g' > patch3.patch <<\EOF
diff --git a/main.c b/main.c
--- a/main.c
+++ b/main.c
@@ -10,3 +10,4 @@
Z for (i = 0; i < 10; i++) {
Z print_int(func(i));Z
+ /* stuff */
Z }
EOF
# This patch will fail even if whitespace differences are being ignored,
# because of the missing EOL at EOF.
sed -e 's/Z/ /g' > patch4.patch <<\EOF
diff --git a/main.c b/main.c
--- a/main.c
+++ b/main.c
@@ -21,1 +21,1 @@
- };Z
\ No newline at end of file
+ };
EOF
# This patch will fail unless whitespace differences are being ignored.
sed -e 's/Z/ /g' > patch5.patch <<\EOF
diff --git a/main.c b/main.c
--- a/main.c
+++ b/main.c
@@ -2,2 +2,3 @@
Z void print_int(int num);
+ /* a comment */
Z int func(int num);
EOF
# And this is how the final output should be. Patches introduce
# HTs but the original SP indents are mostly kept.
sed -e 's/T/ /g' > main.c.final <<\EOF
#include <stdio.h>
void print_int(int num);
int func(int num);
int main() {
int i;
for (i = 0; i < 10; i++) {
print_int(func(i)); /* stuff */
}
Tprintf("\n");
return 0;
}
int func(int num) {
return num * num;
}
void print_int(int num) {
printf("%d", num);
}
EOF
test_expect_success 'file creation' '
git apply patch1.patch
'
test_expect_success 'patch2 fails (retab)' '
test_must_fail git apply patch2.patch
'
test_expect_success 'patch2 applies with --ignore-whitespace' '
git apply --ignore-whitespace patch2.patch
'
test_expect_success 'patch2 reverse applies with --ignore-space-change' '
git apply -R --ignore-space-change patch2.patch
'
git config apply.ignorewhitespace change
test_expect_success 'patch2 applies (apply.ignorewhitespace = change)' '
git apply patch2.patch &&
test_cmp main.c.final main.c
'
test_expect_success 'patch3 fails (missing string at EOL)' '
test_must_fail git apply patch3.patch
'
test_expect_success 'patch4 fails (missing EOL at EOF)' '
test_must_fail git apply patch4.patch
'
test_expect_success 'patch5 fails (leading whitespace differences matter)' '
test_must_fail git apply patch5.patch
'
test_expect_success 're-create file (with --ignore-whitespace)' '
rm -f main.c &&
git apply patch1.patch
'
test_expect_success 'patch5 fails (--no-ignore-whitespace)' '
test_must_fail git apply --no-ignore-whitespace patch5.patch
'
test_expect_success 'apply --ignore-space-change --inaccurate-eof' '
echo 1 >file &&
git apply --ignore-space-change --inaccurate-eof <<-\EOF &&
diff --git a/file b/file
--- a/file
+++ b/file
@@ -1 +1 @@
-1
+2
EOF
printf 2 >expect &&
test_cmp expect file
'
test_done