Merge branch 'development' into blame_rebased

Conflicts:
	include/git2.h

1 files changed, 406 insertions, 0 deletions

diff --git a/examples/log.c b/examples/log.c
new file mode 100644
index 000000000..413c211e4
--- /dev/null
+++ b/examples/log.c
@@ -0,0 +1,406 @@
+#include <stdio.h>
+#include <git2.h>
+#include <stdlib.h>
+#include <string.h>
+
+static void check(int error, const char *message, const char *arg)
+{
+	if (!error)
+		return;
+	if (arg)
+		fprintf(stderr, "%s '%s' (%d)\n", message, arg, error);
+	else
+		fprintf(stderr, "%s (%d)\n", message, error);
+	exit(1);
+}
+
+static void usage(const char *message, const char *arg)
+{
+	if (message && arg)
+		fprintf(stderr, "%s: %s\n", message, arg);
+	else if (message)
+		fprintf(stderr, "%s\n", message);
+	fprintf(stderr, "usage: log [<options>]\n");
+	exit(1);
+}
+
+struct log_state {
+	git_repository *repo;
+	const char *repodir;
+	git_revwalk *walker;
+	int hide;
+	int sorting;
+};
+
+static void set_sorting(struct log_state *s, unsigned int sort_mode)
+{
+	if (!s->repo) {
+		if (!s->repodir) s->repodir = ".";
+		check(git_repository_open_ext(&s->repo, s->repodir, 0, NULL),
+			"Could not open repository", s->repodir);
+	}
+
+	if (!s->walker)
+		check(git_revwalk_new(&s->walker, s->repo),
+			"Could not create revision walker", NULL);
+
+	if (sort_mode == GIT_SORT_REVERSE)
+		s->sorting = s->sorting ^ GIT_SORT_REVERSE;
+	else
+		s->sorting = sort_mode | (s->sorting & GIT_SORT_REVERSE);
+
+	git_revwalk_sorting(s->walker, s->sorting);
+}
+
+static void push_rev(struct log_state *s, git_object *obj, int hide)
+{
+	hide = s->hide ^ hide;
+
+	if (!s->walker) {
+		check(git_revwalk_new(&s->walker, s->repo),
+			"Could not create revision walker", NULL);
+		git_revwalk_sorting(s->walker, s->sorting);
+	}
+
+	if (!obj)
+		check(git_revwalk_push_head(s->walker),
+			"Could not find repository HEAD", NULL);
+	else if (hide)
+		check(git_revwalk_hide(s->walker, git_object_id(obj)),
+			"Reference does not refer to a commit", NULL);
+	else
+		check(git_revwalk_push(s->walker, git_object_id(obj)),
+			"Reference does not refer to a commit", NULL);
+
+	git_object_free(obj);
+}
+
+static int add_revision(struct log_state *s, const char *revstr)
+{
+	git_revspec revs;
+	int hide = 0;
+
+	if (!s->repo) {
+		if (!s->repodir) s->repodir = ".";
+		check(git_repository_open_ext(&s->repo, s->repodir, 0, NULL),
+			"Could not open repository", s->repodir);
+	}
+
+	if (!revstr) {
+		push_rev(s, NULL, hide);
+		return 0;
+	}
+
+	if (*revstr == '^') {
+		revs.flags = GIT_REVPARSE_SINGLE;
+		hide = !hide;
+
+		if (git_revparse_single(&revs.from, s->repo, revstr + 1) < 0)
+			return -1;
+	} else if (git_revparse(&revs, s->repo, revstr) < 0)
+		return -1;
+
+	if ((revs.flags & GIT_REVPARSE_SINGLE) != 0)
+		push_rev(s, revs.from, hide);
+	else {
+		push_rev(s, revs.to, hide);
+
+		if ((revs.flags & GIT_REVPARSE_MERGE_BASE) != 0) {
+			git_oid base;
+			check(git_merge_base(&base, s->repo,
+				git_object_id(revs.from), git_object_id(revs.to)),
+				"Could not find merge base", revstr);
+			check(git_object_lookup(&revs.to, s->repo, &base, GIT_OBJ_COMMIT),
+				"Could not find merge base commit", NULL);
+
+			push_rev(s, revs.to, hide);
+		}
+
+		push_rev(s, revs.from, !hide);
+	}
+
+	return 0;
+}
+
+static void print_time(const git_time *intime, const char *prefix)
+{
+	char sign, out[32];
+	struct tm intm;
+	int offset, hours, minutes;
+	time_t t;
+
+	offset = intime->offset;
+	if (offset < 0) {
+		sign = '-';
+		offset = -offset;
+	} else {
+		sign = '+';
+	}
+
+	hours   = offset / 60;
+	minutes = offset % 60;
+
+	t = (time_t)intime->time + (intime->offset * 60);
+
+	gmtime_r(&t, &intm);
+	strftime(out, sizeof(out), "%a %b %e %T %Y", &intm);
+
+	printf("%s%s %c%02d%02d\n", prefix, out, sign, hours, minutes);
+}
+
+static void print_commit(git_commit *commit)
+{
+	char buf[GIT_OID_HEXSZ + 1];
+	int i, count;
+	const git_signature *sig;
+	const char *scan, *eol;
+
+	git_oid_tostr(buf, sizeof(buf), git_commit_id(commit));
+	printf("commit %s\n", buf);
+
+	if ((count = (int)git_commit_parentcount(commit)) > 1) {
+		printf("Merge:");
+		for (i = 0; i < count; ++i) {
+			git_oid_tostr(buf, 8, git_commit_parent_id(commit, i));
+			printf(" %s", buf);
+		}
+		printf("\n");
+	}
+
+	if ((sig = git_commit_author(commit)) != NULL) {
+		printf("Author: %s <%s>\n", sig->name, sig->email);
+		print_time(&sig->when, "Date:   ");
+	}
+	printf("\n");
+
+	for (scan = git_commit_message(commit); scan && *scan; ) {
+		for (eol = scan; *eol && *eol != '\n'; ++eol) /* find eol */;
+
+		printf("    %.*s\n", (int)(eol - scan), scan);
+		scan = *eol ? eol + 1 : NULL;
+	}
+	printf("\n");
+}
+
+static int print_diff(
+	const git_diff_delta *delta,
+	const git_diff_range *range,
+	char usage,
+	const char *line,
+	size_t line_len,
+	void *data)
+{
+	(void)delta; (void)range; (void)usage; (void)line_len; (void)data;
+	fputs(line, stdout);
+	return 0;
+}
+
+static int match_int(int *value, const char *arg, int allow_negative)
+{
+	char *found;
+	*value = (int)strtol(arg, &found, 10);
+	return (found && *found == '\0' && (allow_negative || *value >= 0));
+}
+
+static int match_int_arg(
+	int *value, const char *arg, const char *pfx, int allow_negative)
+{
+	size_t pfxlen = strlen(pfx);
+	if (strncmp(arg, pfx, pfxlen) != 0)
+		return 0;
+	if (!match_int(value, arg + pfxlen, allow_negative))
+		usage("Invalid value after argument", arg);
+	return 1;
+}
+
+static int match_with_parent(
+	git_commit *commit, int i, git_diff_options *opts)
+{
+	git_commit *parent;
+	git_tree *a, *b;
+	git_diff_list *diff;
+	int ndeltas;
+
+	check(git_commit_parent(&parent, commit, (size_t)i), "Get parent", NULL);
+	check(git_commit_tree(&a, parent), "Tree for parent", NULL);
+	check(git_commit_tree(&b, commit), "Tree for commit", NULL);
+	check(git_diff_tree_to_tree(&diff, git_commit_owner(commit), a, b, opts),
+		  "Checking diff between parent and commit", NULL);
+
+	ndeltas = (int)git_diff_num_deltas(diff);
+
+	git_diff_list_free(diff);
+	git_tree_free(a);
+	git_tree_free(b);
+	git_commit_free(parent);
+
+	return ndeltas > 0;
+}
+
+struct log_options {
+	int show_diff;
+	int skip, limit;
+	int min_parents, max_parents;
+	git_time_t before;
+	git_time_t after;
+	char *author;
+	char *committer;
+};
+
+int main(int argc, char *argv[])
+{
+	int i, count = 0, printed = 0, parents;
+	char *a;
+	struct log_state s;
+	struct log_options opt;
+	git_diff_options diffopts = GIT_DIFF_OPTIONS_INIT;
+	git_oid oid;
+	git_commit *commit = NULL;
+	git_pathspec *ps = NULL;
+
+	git_threads_init();
+
+	memset(&s, 0, sizeof(s));
+	s.sorting = GIT_SORT_TIME;
+
+	memset(&opt, 0, sizeof(opt));
+	opt.max_parents = -1;
+ 	opt.limit = -1;
+
+	for (i = 1; i < argc; ++i) {
+		a = argv[i];
+
+		if (a[0] != '-') {
+			if (!add_revision(&s, a))
+				++count;
+			else /* try failed revision parse as filename */
+				break;
+		} else if (!strcmp(a, "--")) {
+			++i;
+			break;
+		}
+		else if (!strcmp(a, "--date-order"))
+			set_sorting(&s, GIT_SORT_TIME);
+		else if (!strcmp(a, "--topo-order"))
+			set_sorting(&s, GIT_SORT_TOPOLOGICAL);
+		else if (!strcmp(a, "--reverse"))
+			set_sorting(&s, GIT_SORT_REVERSE);
+		else if (!strncmp(a, "--git-dir=", strlen("--git-dir=")))
+			s.repodir = a + strlen("--git-dir=");
+		else if (match_int_arg(&opt.skip, a, "--skip=", 0))
+			/* found valid --skip */;
+		else if (match_int_arg(&opt.limit, a, "--max-count=", 0))
+			/* found valid --max-count */;
+		else if (a[1] >= '0' && a[1] <= '9') {
+			if (!match_int(&opt.limit, a + 1, 0))
+				usage("Invalid limit on number of commits", a);
+		} else if (!strcmp(a, "-n")) {
+			if (i + 1 == argc || !match_int(&opt.limit, argv[i + 1], 0))
+				usage("Argument -n not followed by valid count", argv[i + 1]);
+			else
+				++i;
+		}
+		else if (!strcmp(a, "--merges"))
+			opt.min_parents = 2;
+		else if (!strcmp(a, "--no-merges"))
+			opt.max_parents = 1;
+		else if (!strcmp(a, "--no-min-parents"))
+			opt.min_parents = 0;
+		else if (!strcmp(a, "--no-max-parents"))
+			opt.max_parents = -1;
+		else if (match_int_arg(&opt.max_parents, a, "--max-parents=", 1))
+			/* found valid --max-parents */;
+		else if (match_int_arg(&opt.min_parents, a, "--min-parents=", 0))
+			/* found valid --min_parents */;
+		else if (!strcmp(a, "-p") || !strcmp(a, "-u") || !strcmp(a, "--patch"))
+			opt.show_diff = 1;
+		else
+			usage("Unsupported argument", a);
+	}
+
+	if (!count)
+		add_revision(&s, NULL);
+
+	diffopts.pathspec.strings = &argv[i];
+	diffopts.pathspec.count   = argc - i;
+	if (diffopts.pathspec.count > 0)
+		check(git_pathspec_new(&ps, &diffopts.pathspec),
+			"Building pathspec", NULL);
+
+	printed = count = 0;
+
+	for (; !git_revwalk_next(&oid, s.walker); git_commit_free(commit)) {
+		check(git_commit_lookup(&commit, s.repo, &oid),
+			"Failed to look up commit", NULL);
+
+		parents = (int)git_commit_parentcount(commit);
+		if (parents < opt.min_parents)
+			continue;
+		if (opt.max_parents > 0 && parents > opt.max_parents)
+			continue;
+
+		if (diffopts.pathspec.count > 0) {
+			int unmatched = parents;
+
+			if (parents == 0) {
+				git_tree *tree;
+				check(git_commit_tree(&tree, commit), "Get tree", NULL);
+				if (git_pathspec_match_tree(
+						NULL, tree, GIT_PATHSPEC_NO_MATCH_ERROR, ps) != 0)
+					unmatched = 1;
+				git_tree_free(tree);
+			} else if (parents == 1) {
+				unmatched = match_with_parent(commit, 0, &diffopts) ? 0 : 1;
+			} else {
+				for (i = 0; i < parents; ++i) {
+					if (match_with_parent(commit, i, &diffopts))
+						unmatched--;
+				}
+			}
+
+			if (unmatched > 0)
+				continue;
+		}
+
+		if (count++ < opt.skip)
+			continue;
+		if (opt.limit != -1 && printed++ >= opt.limit) {
+			git_commit_free(commit);
+			break;
+		}
+
+		print_commit(commit);
+
+		if (opt.show_diff) {
+			git_tree *a = NULL, *b = NULL;
+			git_diff_list *diff = NULL;
+
+			if (parents > 1)
+				continue;
+			check(git_commit_tree(&b, commit), "Get tree", NULL);
+			if (parents == 1) {
+				git_commit *parent;
+				check(git_commit_parent(&parent, commit, 0), "Get parent", NULL);
+				check(git_commit_tree(&a, parent), "Tree for parent", NULL);
+				git_commit_free(parent);
+			}
+
+			check(git_diff_tree_to_tree(
+				&diff, git_commit_owner(commit), a, b, &diffopts),
+				"Diff commit with parent", NULL);
+			check(git_diff_print_patch(diff, print_diff, NULL),
+				"Displaying diff", NULL);
+
+			git_diff_list_free(diff);
+			git_tree_free(a);
+			git_tree_free(b);
+		}
+	}
+
+	git_pathspec_free(ps);
+	git_revwalk_free(s.walker);
+	git_repository_free(s.repo);
+	git_threads_shutdown();
+
+	return 0;
+}