Merge branch 'new-error-handling' into development

Conflicts:
	.travis.yml
	include/git2/diff.h
	src/config_file.c
	src/diff.c
	src/diff_output.c
	src/mwindow.c
	src/path.c
	tests-clar/clar_helpers.c
	tests-clar/object/tree/frompath.c
	tests/t00-core.c
	tests/t03-objwrite.c
	tests/t08-tag.c
	tests/t10-refs.c
	tests/t12-repo.c
	tests/t18-status.c
	tests/test_helpers.c
	tests/test_main.c

6 files changed, 261 insertions, 34 deletions

diff --git a/tests-clar/diff/diff_helpers.c b/tests-clar/diff/diff_helpers.c
index d8eca7d9b..74a44ab99 100644
--- a/tests-clar/diff/diff_helpers.c
+++ b/tests-clar/diff/diff_helpers.c
@@ -5,10 +5,10 @@ git_tree *resolve_commit_oid_to_tree(
 	git_repository *repo,
 	const char *partial_oid)
 {
-	size_t len = strlen(partial_oid);
+	unsigned int len = (unsigned int)strlen(partial_oid);
 	git_oid oid;
-	git_object *obj;
-	git_tree *tree;
+	git_object *obj = NULL;
+	git_tree *tree = NULL;
 
 	if (git_oid_fromstrn(&oid, partial_oid, len) == 0)
 		git_object_lookup_prefix(&obj, repo, &oid, len, GIT_OBJ_ANY);
@@ -27,7 +27,9 @@ int diff_file_fn(
 	float progress)
 {
 	diff_expects *e = cb_data;
-	(void)progress;
+
+	GIT_UNUSED(progress);
+
 	e->files++;
 	switch (delta->status) {
 	case GIT_DELTA_ADDED: e->file_adds++; break;
@@ -48,9 +50,11 @@ int diff_hunk_fn(
 	size_t header_len)
 {
 	diff_expects *e = cb_data;
-	(void)delta;
-	(void)header;
-	(void)header_len;
+
+	GIT_UNUSED(delta);
+	GIT_UNUSED(header);
+	GIT_UNUSED(header_len);
+
 	e->hunks++;
 	e->hunk_old_lines += range->old_lines;
 	e->hunk_new_lines += range->new_lines;
@@ -60,14 +64,18 @@ int diff_hunk_fn(
 int diff_line_fn(
 	void *cb_data,
 	git_diff_delta *delta,
+	git_diff_range *range,
 	char line_origin,
 	const char *content,
 	size_t content_len)
 {
 	diff_expects *e = cb_data;
-	(void)delta;
-	(void)content;
-	(void)content_len;
+
+	GIT_UNUSED(delta);
+	GIT_UNUSED(range);
+	GIT_UNUSED(content);
+	GIT_UNUSED(content_len);
+
 	e->lines++;
 	switch (line_origin) {
 	case GIT_DIFF_LINE_CONTEXT:
diff --git a/tests-clar/diff/diff_helpers.h b/tests-clar/diff/diff_helpers.h
index 010d156fa..ca8c40177 100644
--- a/tests-clar/diff/diff_helpers.h
+++ b/tests-clar/diff/diff_helpers.h
@@ -37,6 +37,7 @@ extern int diff_hunk_fn(
 extern int diff_line_fn(
 	void *cb_data,
 	git_diff_delta *delta,
+	git_diff_range *range,
 	char line_origin,
 	const char *content,
 	size_t content_len);
diff --git a/tests-clar/diff/iterator.c b/tests-clar/diff/iterator.c
index 3953fd83f..0ec2326eb 100644
--- a/tests-clar/diff/iterator.c
+++ b/tests-clar/diff/iterator.c
@@ -37,7 +37,7 @@ static void tree_iterator_test(
 
 	while (entry != NULL) {
 		if (expected_values != NULL)
-			cl_assert_strequal(expected_values[count], entry->path);
+			cl_assert_equal_s(expected_values[count], entry->path);
 
 		count++;
 
@@ -139,6 +139,40 @@ void test_diff_iterator__tree_3(void)
 	tree_iterator_test("status", "0017bd4ab1e", 8, expected_tree_3);
 }
 
+/* $ git ls-tree -r --name-only 24fa9a9fc4e202313e24b648087495441dab432b */
+const char *expected_tree_4[] = {
+	"attr0",
+	"attr1",
+	"attr2",
+	"attr3",
+	"binfile",
+	"gitattributes",
+	"macro_bad",
+	"macro_test",
+	"root_test1",
+	"root_test2",
+	"root_test3",
+	"root_test4.txt",
+	"sub/abc",
+	"sub/file",
+	"sub/sub/file",
+	"sub/sub/subsub.txt",
+	"sub/subdir_test1",
+	"sub/subdir_test2.txt",
+	"subdir/.gitattributes",
+	"subdir/abc",
+	"subdir/subdir_test1",
+	"subdir/subdir_test2.txt",
+	"subdir2/subdir2_test1",
+	NULL
+};
+
+void test_diff_iterator__tree_4(void)
+{
+	tree_iterator_test(
+		"attr", "24fa9a9fc4e202313e24b648087495441dab432b",
+		23, expected_tree_4);
+}
 
 /* -- INDEX ITERATOR TESTS -- */
 
@@ -158,7 +192,7 @@ static void index_iterator_test(
 
 	while (entry != NULL) {
 		if (expected_names != NULL)
-			cl_assert_strequal(expected_names[count], entry->path);
+			cl_assert_equal_s(expected_names[count], entry->path);
 
 		if (expected_oids != NULL) {
 			git_oid oid;
@@ -188,6 +222,12 @@ static const char *expected_index_0[] = {
 	"root_test2",
 	"root_test3",
 	"root_test4.txt",
+	"sub/abc",
+	"sub/file",
+	"sub/sub/file",
+	"sub/sub/subsub.txt",
+	"sub/subdir_test1",
+	"sub/subdir_test2.txt",
 	"subdir/.gitattributes",
 	"subdir/abc",
 	"subdir/subdir_test1",
@@ -208,6 +248,12 @@ static const char *expected_index_oids_0[] = {
 	"4d713dc48e6b1bd75b0d61ad078ba9ca3a56745d",
 	"108bb4e7fd7b16490dc33ff7d972151e73d7166e",
 	"fe773770c5a6cc7185580c9204b1ff18a33ff3fc",
+	"3e42ffc54a663f9401cc25843d6c0e71a33e4249",
+	"45b983be36b73c0788dc9cbcb76cbb80fc7bb057",
+	"45b983be36b73c0788dc9cbcb76cbb80fc7bb057",
+	"9e5bdc47d6a80f2be0ea3049ad74231b94609242",
+	"e563cf4758f0d646f1b14b76016aa17fa9e549a4",
+	"fb5067b1aef3ac1ada4b379dbcb7d17255df7d78",
 	"99eae476896f4907224978b88e5ecaa6c5bb67a9",
 	"3e42ffc54a663f9401cc25843d6c0e71a33e4249",
 	"e563cf4758f0d646f1b14b76016aa17fa9e549a4",
@@ -217,7 +263,7 @@ static const char *expected_index_oids_0[] = {
 
 void test_diff_iterator__index_0(void)
 {
-	index_iterator_test("attr", 17, expected_index_0, expected_index_oids_0);
+	index_iterator_test("attr", 23, expected_index_0, expected_index_oids_0);
 }
 
 static const char *expected_index_1[] = {
@@ -284,7 +330,7 @@ static void workdir_iterator_test(
 		}
 
 		if (expected_names != NULL)
-			cl_assert_strequal(expected_names[count_all], entry->path);
+			cl_assert_equal_s(expected_names[count_all], entry->path);
 
 		if (an_ignored_name && strcmp(an_ignored_name,entry->path)==0)
 			cl_assert(ignored);
diff --git a/tests-clar/diff/patch.c b/tests-clar/diff/patch.c
new file mode 100644
index 000000000..05e748667
--- /dev/null
+++ b/tests-clar/diff/patch.c
@@ -0,0 +1,99 @@
+#include "clar_libgit2.h"
+#include "diff_helpers.h"
+
+static git_repository *g_repo = NULL;
+
+void test_diff_patch__initialize(void)
+{
+	g_repo = cl_git_sandbox_init("status");
+}
+
+void test_diff_patch__cleanup(void)
+{
+	cl_git_sandbox_cleanup();
+}
+
+#define EXPECTED_HEADER "diff --git a/subdir.txt b/subdir.txt\n" \
+	"deleted file mode 100644\n" \
+	"index e8ee89e..0000000\n" \
+	"--- a/subdir.txt\n" \
+	"+++ /dev/null\n"
+
+#define EXPECTED_HUNK "@@ -1,2 +0,0 @@\n"
+
+static int check_removal_cb(
+	void *cb_data,
+	git_diff_delta *delta,
+	git_diff_range *range,
+	char line_origin,
+	const char *formatted_output,
+	size_t output_len)
+{
+	GIT_UNUSED(cb_data);
+	GIT_UNUSED(output_len);
+
+	switch (line_origin) {
+	case GIT_DIFF_LINE_FILE_HDR:
+		cl_assert_equal_s(EXPECTED_HEADER, formatted_output);
+		cl_assert(range == NULL);
+		goto check_delta;
+
+	case GIT_DIFF_LINE_HUNK_HDR:
+		cl_assert_equal_s(EXPECTED_HUNK, formatted_output);
+		/* Fall through */
+
+	case GIT_DIFF_LINE_CONTEXT:
+	case GIT_DIFF_LINE_DELETION:
+		goto check_range;
+
+	default:
+		/* unexpected code path */
+		return -1;
+	}
+
+check_range:
+	cl_assert(range != NULL);
+	cl_assert_equal_i(1, range->old_start);
+	cl_assert_equal_i(2, range->old_lines);
+	cl_assert_equal_i(0, range->new_start);
+	cl_assert_equal_i(0, range->new_lines);
+
+check_delta:
+	cl_assert_equal_s("subdir.txt", delta->old_file.path);
+	cl_assert_equal_s("subdir.txt", delta->new_file.path);
+	cl_assert_equal_i(GIT_DELTA_DELETED, delta->status);
+
+	return 0;
+}
+
+void test_diff_patch__can_properly_display_the_removal_of_a_file(void)
+{
+	/*
+	* $ git diff 26a125e..735b6a2
+	* diff --git a/subdir.txt b/subdir.txt
+	* deleted file mode 100644
+	* index e8ee89e..0000000
+	* --- a/subdir.txt
+	* +++ /dev/null
+	* @@ -1,2 +0,0 @@
+	* -Is it a bird?
+	* -Is it a plane?
+	*/
+
+	const char *one_sha = "26a125e";
+	const char *another_sha = "735b6a2";
+	git_tree *one, *another;
+	git_diff_list *diff;
+
+	one = resolve_commit_oid_to_tree(g_repo, one_sha);
+	another = resolve_commit_oid_to_tree(g_repo, another_sha);
+
+	cl_git_pass(git_diff_tree_to_tree(g_repo, NULL, one, another, &diff));
+
+	cl_git_pass(git_diff_print_patch(diff, NULL, check_removal_cb));
+
+	git_diff_list_free(diff);
+
+	git_tree_free(another);
+	git_tree_free(one);
+}
diff --git a/tests-clar/diff/tree.c b/tests-clar/diff/tree.c
index 91e1343cc..1e269ae42 100644
--- a/tests-clar/diff/tree.c
+++ b/tests-clar/diff/tree.c
@@ -149,15 +149,15 @@ void test_diff_tree__options(void)
 			diff, &actual, diff_file_fn, diff_hunk_fn, diff_line_fn));
 
 		expected = &test_expects[i];
-		cl_assert_intequal(actual.files,     expected->files);
-		cl_assert_intequal(actual.file_adds, expected->file_adds);
- 		cl_assert_intequal(actual.file_dels, expected->file_dels);
-		cl_assert_intequal(actual.file_mods, expected->file_mods);
-		cl_assert_intequal(actual.hunks,     expected->hunks);
-		cl_assert_intequal(actual.lines,     expected->lines);
-		cl_assert_intequal(actual.line_ctxt, expected->line_ctxt);
-		cl_assert_intequal(actual.line_adds, expected->line_adds);
-		cl_assert_intequal(actual.line_dels, expected->line_dels);
+		cl_assert_equal_i(actual.files,     expected->files);
+		cl_assert_equal_i(actual.file_adds, expected->file_adds);
+ 		cl_assert_equal_i(actual.file_dels, expected->file_dels);
+		cl_assert_equal_i(actual.file_mods, expected->file_mods);
+		cl_assert_equal_i(actual.hunks,     expected->hunks);
+		cl_assert_equal_i(actual.lines,     expected->lines);
+		cl_assert_equal_i(actual.line_ctxt, expected->line_ctxt);
+		cl_assert_equal_i(actual.line_adds, expected->line_adds);
+		cl_assert_equal_i(actual.line_dels, expected->line_dels);
 
 		git_diff_list_free(diff);
 		diff = NULL;
diff --git a/tests-clar/diff/workdir.c b/tests-clar/diff/workdir.c
index 9fefdbb03..1ea1af86a 100644
--- a/tests-clar/diff/workdir.c
+++ b/tests-clar/diff/workdir.c
@@ -37,19 +37,19 @@ void test_diff_workdir__to_index(void)
 	 * - git diff
 	 * - mv .git .gitted
 	 */
-	cl_assert_intequal(12, exp.files);
-	cl_assert_intequal(0, exp.file_adds);
-	cl_assert_intequal(4, exp.file_dels);
-	cl_assert_intequal(4, exp.file_mods);
-	cl_assert_intequal(1, exp.file_ignored);
-	cl_assert_intequal(3, exp.file_untracked);
+	cl_assert_equal_i(12, exp.files);
+	cl_assert_equal_i(0, exp.file_adds);
+	cl_assert_equal_i(4, exp.file_dels);
+	cl_assert_equal_i(4, exp.file_mods);
+	cl_assert_equal_i(1, exp.file_ignored);
+	cl_assert_equal_i(3, exp.file_untracked);
 
-	cl_assert_intequal(8, exp.hunks);
+	cl_assert_equal_i(8, exp.hunks);
 
-	cl_assert_intequal(14, exp.lines);
-	cl_assert_intequal(5, exp.line_ctxt);
-	cl_assert_intequal(4, exp.line_adds);
-	cl_assert_intequal(5, exp.line_dels);
+	cl_assert_equal_i(14, exp.lines);
+	cl_assert_equal_i(5, exp.line_ctxt);
+	cl_assert_equal_i(4, exp.line_adds);
+	cl_assert_equal_i(5, exp.line_dels);
 
 	git_diff_list_free(diff);
 }
@@ -164,6 +164,79 @@ void test_diff_workdir__to_tree(void)
 	git_tree_free(b);
 }
 
+void test_diff_workdir__to_index_with_pathspec(void)
+{
+	git_diff_options opts = {0};
+	git_diff_list *diff = NULL;
+	diff_expects exp;
+	char *pathspec = NULL;
+
+	opts.context_lines = 3;
+	opts.interhunk_lines = 1;
+	opts.flags |= GIT_DIFF_INCLUDE_IGNORED | GIT_DIFF_INCLUDE_UNTRACKED;
+	opts.pathspec.strings = &pathspec;
+	opts.pathspec.count   = 1;
+
+	memset(&exp, 0, sizeof(exp));
+
+	cl_git_pass(git_diff_workdir_to_index(g_repo, &opts, &diff));
+	cl_git_pass(git_diff_foreach(diff, &exp, diff_file_fn, NULL, NULL));
+
+	cl_assert_equal_i(12, exp.files);
+	cl_assert_equal_i(0, exp.file_adds);
+	cl_assert_equal_i(4, exp.file_dels);
+	cl_assert_equal_i(4, exp.file_mods);
+	cl_assert_equal_i(1, exp.file_ignored);
+	cl_assert_equal_i(3, exp.file_untracked);
+
+	git_diff_list_free(diff);
+
+	memset(&exp, 0, sizeof(exp));
+	pathspec = "modified_file";
+
+	cl_git_pass(git_diff_workdir_to_index(g_repo, &opts, &diff));
+	cl_git_pass(git_diff_foreach(diff, &exp, diff_file_fn, NULL, NULL));
+
+	cl_assert_equal_i(1, exp.files);
+	cl_assert_equal_i(0, exp.file_adds);
+	cl_assert_equal_i(0, exp.file_dels);
+	cl_assert_equal_i(1, exp.file_mods);
+	cl_assert_equal_i(0, exp.file_ignored);
+	cl_assert_equal_i(0, exp.file_untracked);
+
+	git_diff_list_free(diff);
+
+	memset(&exp, 0, sizeof(exp));
+	pathspec = "subdir";
+
+	cl_git_pass(git_diff_workdir_to_index(g_repo, &opts, &diff));
+	cl_git_pass(git_diff_foreach(diff, &exp, diff_file_fn, NULL, NULL));
+
+	cl_assert_equal_i(3, exp.files);
+	cl_assert_equal_i(0, exp.file_adds);
+	cl_assert_equal_i(1, exp.file_dels);
+	cl_assert_equal_i(1, exp.file_mods);
+	cl_assert_equal_i(0, exp.file_ignored);
+	cl_assert_equal_i(1, exp.file_untracked);
+
+	git_diff_list_free(diff);
+
+	memset(&exp, 0, sizeof(exp));
+	pathspec = "*_deleted";
+
+	cl_git_pass(git_diff_workdir_to_index(g_repo, &opts, &diff));
+	cl_git_pass(git_diff_foreach(diff, &exp, diff_file_fn, NULL, NULL));
+
+	cl_assert_equal_i(2, exp.files);
+	cl_assert_equal_i(0, exp.file_adds);
+	cl_assert_equal_i(2, exp.file_dels);
+	cl_assert_equal_i(0, exp.file_mods);
+	cl_assert_equal_i(0, exp.file_ignored);
+	cl_assert_equal_i(0, exp.file_untracked);
+
+	git_diff_list_free(diff);
+}
+
 /* PREPARATION OF TEST DATA
  *
  * Since there is no command line equivalent of git_diff_workdir_to_tree,