Merge branch 'gb/apply-ignore-whitespace'

* gb/apply-ignore-whitespace:
  git apply: option to ignore whitespace differences

1 files changed, 185 insertions, 0 deletions

diff --git a/t/t4107-apply-ignore-whitespace.sh b/t/t4107-apply-ignore-whitespace.sh
new file mode 100755
index 0000000000..484654d6e4
--- /dev/null
+++ b/t/t4107-apply-ignore-whitespace.sh
@@ -0,0 +1,185 @@
+#!/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);
+T/* a comment */
+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_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 applies (leading whitespace)' '
+	git-apply patch5.patch
+'
+
+test_expect_success 'patches do not mangle whitespace' '
+	test_cmp main.c main.c.final
+'
+
+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_done