patch: emit binary patches (optionally)

3 files changed, 284 insertions, 0 deletions

diff --git a/tests/core/buffer.c b/tests/core/buffer.c
index eb1d95a95..da5ec605c 100644
--- a/tests/core/buffer.c
+++ b/tests/core/buffer.c
@@ -773,6 +773,26 @@ void test_core_buffer__base64(void)
 	git_buf_free(&buf);
 }
 
+void test_core_buffer__base85(void)
+{
+	git_buf buf = GIT_BUF_INIT;
+
+	cl_git_pass(git_buf_put_base85(&buf, "this", 4));
+	cl_assert_equal_s("bZBXF", buf.ptr);
+	git_buf_clear(&buf);
+
+	cl_git_pass(git_buf_put_base85(&buf, "two rnds", 8));
+	cl_assert_equal_s("ba!tca&BaE", buf.ptr);
+	git_buf_clear(&buf);
+
+	cl_git_pass(git_buf_put_base85(&buf, "this is base 85 encoded",
+		strlen("this is base 85 encoded")));
+	cl_assert_equal_s("bZBXFAZc?TVqtS-AUHK3Wo~0{WMyOk", buf.ptr);
+	git_buf_clear(&buf);
+
+	git_buf_free(&buf);
+}
+
 void test_core_buffer__classify_with_utf8(void)
 {
 	char *data0 = "Simple text\n";
diff --git a/tests/diff/binary.c b/tests/diff/binary.c
new file mode 100644
index 000000000..cb574a588
--- /dev/null
+++ b/tests/diff/binary.c
@@ -0,0 +1,263 @@
+#include "clar_libgit2.h"
+
+#include "buffer.h"
+#include "filebuf.h"
+
+static git_repository *repo;
+
+void test_diff_binary__initialize(void)
+{
+}
+
+void test_diff_binary__cleanup(void)
+{
+	cl_git_sandbox_cleanup();
+}
+
+void test_patch(
+	const char *one,
+	const char *two,
+	const git_diff_options *opts,
+	const char *expected)
+{
+	git_oid id_one, id_two;
+	git_index *index = NULL;
+	git_commit *commit_one, *commit_two = NULL;
+	git_tree *tree_one, *tree_two;
+	git_diff *diff;
+	git_patch *patch;
+	git_buf actual = GIT_BUF_INIT;
+
+	cl_git_pass(git_oid_fromstr(&id_one, one));
+	cl_git_pass(git_commit_lookup(&commit_one, repo, &id_one));
+	cl_git_pass(git_commit_tree(&tree_one, commit_one));
+
+	if (two) {
+		cl_git_pass(git_oid_fromstr(&id_two, two));
+		cl_git_pass(git_commit_lookup(&commit_two, repo, &id_two));
+		cl_git_pass(git_commit_tree(&tree_two, commit_two));
+	} else {
+		cl_git_pass(git_repository_index(&index, repo));
+		cl_git_pass(git_index_write_tree(&id_two, index));
+		cl_git_pass(git_tree_lookup(&tree_two, repo, &id_two));
+	}
+
+	cl_git_pass(git_diff_tree_to_tree(&diff, repo, tree_one, tree_two, opts));
+
+	cl_git_pass(git_patch_from_diff(&patch, diff, 0));
+	cl_git_pass(git_patch_to_buf(&actual, patch));
+
+	cl_assert_equal_s(expected, actual.ptr);
+
+	git_buf_free(&actual);
+	git_patch_free(patch);
+	git_diff_free(diff);
+	git_tree_free(tree_one);
+	git_tree_free(tree_two);
+	git_commit_free(commit_one);
+	git_commit_free(commit_two);
+	git_index_free(index);
+}
+
+void test_diff_binary__add_normal(void)
+{
+	git_diff_options opts = GIT_DIFF_OPTIONS_INIT;
+	const char *expected =
+		"diff --git a/binary.bin b/binary.bin\n" \
+		"new file mode 100644\n" \
+		"index 0000000..bd474b2\n" \
+		"Binary files /dev/null and b/binary.bin differ\n";
+
+	repo = cl_git_sandbox_init("diff_format_email");
+	test_patch(
+		"873806f6f27e631eb0b23e4b56bea2bfac14a373",
+		"897d3af16ca9e420cd071b1c4541bd2b91d04c8c",
+		&opts,
+		expected);
+}
+
+void test_diff_binary__add(void)
+{
+	git_diff_options opts = GIT_DIFF_OPTIONS_INIT;
+	const char *expected =
+		"diff --git a/binary.bin b/binary.bin\n" \
+		"new file mode 100644\n" \
+		"index 0000000000000000000000000000000000000000..bd474b2519cc15eab801ff851cc7d50f0dee49a1\n" \
+		"GIT binary patch\n" \
+		"literal 3\n" \
+		"Kc${Nk-~s>u4FC%O\n"
+		"\n" \
+		"literal 0\n" \
+		"Hc$@<O00001\n";
+
+	opts.flags = GIT_DIFF_SHOW_BINARY;
+	opts.id_abbrev = GIT_OID_HEXSZ;
+
+	repo = cl_git_sandbox_init("diff_format_email");
+	test_patch(
+		"873806f6f27e631eb0b23e4b56bea2bfac14a373",
+		"897d3af16ca9e420cd071b1c4541bd2b91d04c8c",
+		&opts,
+		expected);
+}
+
+void test_diff_binary__modify_normal(void)
+{
+	git_diff_options opts = GIT_DIFF_OPTIONS_INIT;
+	const char *expected =
+		"diff --git a/binary.bin b/binary.bin\n" \
+		"index bd474b2..9ac35ff 100644\n" \
+		"Binary files a/binary.bin and b/binary.bin differ\n";
+
+	repo = cl_git_sandbox_init("diff_format_email");
+	test_patch(
+		"897d3af16ca9e420cd071b1c4541bd2b91d04c8c",
+		"8d7523f6fcb2404257889abe0d96f093d9f524f9",
+		&opts,
+		expected);
+}
+
+void test_diff_binary__modify(void)
+{
+	git_diff_options opts = GIT_DIFF_OPTIONS_INIT;
+	const char *expected =
+		"diff --git a/binary.bin b/binary.bin\n" \
+		"index bd474b2519cc15eab801ff851cc7d50f0dee49a1..9ac35ff15cd8864aeafd889e4826a3150f0b06c4 100644\n" \
+		"GIT binary patch\n" \
+		"literal 5\n" \
+		"Mc${NkU}WL~000&M4gdfE\n" \
+		"\n" \
+		"literal 3\n" \
+		"Kc${Nk-~s>u4FC%O\n";
+
+	opts.flags = GIT_DIFF_SHOW_BINARY;
+
+	repo = cl_git_sandbox_init("diff_format_email");
+	test_patch(
+		"897d3af16ca9e420cd071b1c4541bd2b91d04c8c",
+		"8d7523f6fcb2404257889abe0d96f093d9f524f9",
+		&opts,
+		expected);
+}
+
+void test_diff_binary__delete_normal(void)
+{
+	git_diff_options opts = GIT_DIFF_OPTIONS_INIT;
+	const char *expected =
+		"diff --git a/binary.bin b/binary.bin\n" \
+		"deleted file mode 100644\n" \
+		"index bd474b2..0000000\n" \
+		"Binary files a/binary.bin and /dev/null differ\n";
+
+	repo = cl_git_sandbox_init("diff_format_email");
+	test_patch(
+		"897d3af16ca9e420cd071b1c4541bd2b91d04c8c",
+		"873806f6f27e631eb0b23e4b56bea2bfac14a373",
+		&opts,
+		expected);
+}
+
+void test_diff_binary__delete(void)
+{
+	git_diff_options opts = GIT_DIFF_OPTIONS_INIT;
+	const char *expected =
+		"diff --git a/binary.bin b/binary.bin\n" \
+		"deleted file mode 100644\n" \
+		"index bd474b2519cc15eab801ff851cc7d50f0dee49a1..0000000000000000000000000000000000000000\n" \
+		"GIT binary patch\n" \
+		"literal 0\n" \
+		"Hc$@<O00001\n" \
+		"\n" \
+		"literal 3\n" \
+		"Kc${Nk-~s>u4FC%O\n";
+
+	opts.flags = GIT_DIFF_SHOW_BINARY;
+	opts.id_abbrev = GIT_OID_HEXSZ;
+
+	repo = cl_git_sandbox_init("diff_format_email");
+	test_patch(
+		"897d3af16ca9e420cd071b1c4541bd2b91d04c8c",
+		"873806f6f27e631eb0b23e4b56bea2bfac14a373",
+		&opts,
+		expected);
+}
+
+void test_diff_binary__delta(void)
+{
+	git_index *index;
+	git_buf contents = GIT_BUF_INIT;
+	size_t i;
+	git_diff_options opts = GIT_DIFF_OPTIONS_INIT;
+	const char *expected =
+		"diff --git a/songof7cities.txt b/songof7cities.txt\n" \
+		"index 4210ffd5c390b21dd5483375e75288dea9ede512..cc84ec183351c9944ed90a619ca08911924055b5 100644\n" \
+		"GIT binary patch\n" \
+		"delta 198\n" \
+		"zc$}LmI8{(0BqLQJI6p64AwNwaIJGP_Pa)Ye#M3o+qJ$<Jl;sX*mF<MGCYv&*L7AHu\n" \
+		"zGA1*^gt?gYVN82wTbPO_W)+x<&1+cP;HrPHR>PQ;Y(X&QMK*C5^Br3bjG4d=XI^5@\n" \
+		"JfH567LIG)KJdFSV\n" \
+		"\n" \
+		"delta 198\n" \
+		"zc$}LmI8{(0BqLQJI6p64AwNwaIJGP_Pr*5}Br~;mqJ$<Jl;sX*mF<MGCYv&*L7AHu\n" \
+		"zGA1*^gt?gYVN82wTbPO_W)+x<&1+cP;HrPHR>PQ;Y(X&QMK*C5^Br3bjG4d=XI^5@\n" \
+		"JfH567LIF3FM2!Fd\n";
+
+	opts.flags = GIT_DIFF_SHOW_BINARY | GIT_DIFF_FORCE_BINARY;
+	opts.id_abbrev = GIT_OID_HEXSZ;
+
+	repo = cl_git_sandbox_init("renames");
+	cl_git_pass(git_repository_index(&index, repo));
+
+	cl_git_pass(git_futils_readbuffer(&contents, "renames/songof7cities.txt"));
+
+	for (i = 0; i < contents.size - 6; i++) {
+		if (strncmp(&contents.ptr[i], "Cities", 6) == 0)
+			memcpy(&contents.ptr[i], "cITIES", 6);
+	}
+
+	cl_git_rewritefile("renames/songof7cities.txt", contents.ptr);
+	cl_git_pass(git_index_add_bypath(index, "songof7cities.txt"));
+	cl_git_pass(git_index_write(index));
+
+	test_patch(
+		"19dd32dfb1520a64e5bbaae8dce6ef423dfa2f13",
+		NULL,
+		&opts,
+		expected);
+
+	git_index_free(index);
+	git_buf_free(&contents);
+}
+
+void test_diff_binary__delta_append(void)
+{
+	git_index *index;
+	git_diff_options opts = GIT_DIFF_OPTIONS_INIT;
+	const char *expected =
+		"diff --git a/untimely.txt b/untimely.txt\n" \
+		"index 9a69d960ae94b060f56c2a8702545e2bb1abb935..1111d4f11f4b35bf6759e0fb714fe09731ef0840 100644\n" \
+		"GIT binary patch\n" \
+		"delta 32\n" \
+		"nc%1vf+QYWt3zLL@hC)e3Vu?a>QDRl4f_G*?PG(-ZA}<#J$+QbW\n" \
+		"\n" \
+		"delta 7\n" \
+		"Oc%18D`@*{63ljhg(E~C7\n";
+
+	opts.flags = GIT_DIFF_SHOW_BINARY | GIT_DIFF_FORCE_BINARY;
+	opts.id_abbrev = GIT_OID_HEXSZ;
+
+	repo = cl_git_sandbox_init("renames");
+	cl_git_pass(git_repository_index(&index, repo));
+
+	cl_git_append2file("renames/untimely.txt", "Oh that crazy Kipling!\r\n");
+	cl_git_pass(git_index_add_bypath(index, "untimely.txt"));
+	cl_git_pass(git_index_write(index));
+
+	test_patch(
+		"19dd32dfb1520a64e5bbaae8dce6ef423dfa2f13",
+		NULL,
+		&opts,
+		expected);
+
+	git_index_free(index);
+}
diff --git a/tests/diff/patch.c b/tests/diff/patch.c
index 76d7fcde3..1184d1968 100644
--- a/tests/diff/patch.c
+++ b/tests/diff/patch.c
@@ -2,6 +2,7 @@
 #include "git2/sys/repository.h"
 
 #include "diff_helpers.h"
+#include "diff.h"
 #include "repository.h"
 #include "buf_text.h"