[PATCH 3/6] assume parse_commit checks for NULL commit

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The parse_commit function will check whether it was passed a
NULL commit pointer, and if so, return an error. There is no
need for callers to check this separately.

Signed-off-by: Jeff King <peff@xxxxxxxx>
---
 builtin/branch.c | 2 +-
 builtin/commit.c | 4 ++--
 commit.c         | 2 +-
 notes-utils.c    | 2 +-
 sha1_name.c      | 2 --
 5 files changed, 5 insertions(+), 7 deletions(-)

diff --git a/builtin/branch.c b/builtin/branch.c
index ad0f86d..491090f 100644
--- a/builtin/branch.c
+++ b/builtin/branch.c
@@ -496,7 +496,7 @@ static void add_verbose_info(struct strbuf *out, struct ref_item *item,
 	const char *sub = _(" **** invalid ref ****");
 	struct commit *commit = item->commit;
 
-	if (commit && !parse_commit(commit)) {
+	if (!parse_commit(commit)) {
 		pp_commit_easy(CMIT_FMT_ONELINE, commit, &subject);
 		sub = subject.buf;
 	}
diff --git a/builtin/commit.c b/builtin/commit.c
index 6ab4605..e89c519 100644
--- a/builtin/commit.c
+++ b/builtin/commit.c
@@ -1338,7 +1338,7 @@ static void print_summary(const char *prefix, const unsigned char *sha1,
 	commit = lookup_commit(sha1);
 	if (!commit)
 		die(_("couldn't look up newly created commit"));
-	if (!commit || parse_commit(commit))
+	if (parse_commit(commit))
 		die(_("could not parse newly created commit"));
 
 	strbuf_addstr(&format, "format:%h] %s");
@@ -1525,7 +1525,7 @@ int cmd_commit(int argc, const char **argv, const char *prefix)
 		current_head = NULL;
 	else {
 		current_head = lookup_commit_or_die(sha1, "HEAD");
-		if (!current_head || parse_commit(current_head))
+		if (parse_commit(current_head))
 			die(_("could not parse HEAD commit"));
 	}
 	argc = parse_and_validate_options(argc, argv, builtin_commit_options,
diff --git a/commit.c b/commit.c
index 51a9bbc..11509ff 100644
--- a/commit.c
+++ b/commit.c
@@ -79,7 +79,7 @@ struct commit *lookup_commit_reference_by_name(const char *name)
 	if (get_sha1_committish(name, sha1))
 		return NULL;
 	commit = lookup_commit_reference(sha1);
-	if (!commit || parse_commit(commit))
+	if (parse_commit(commit))
 		return NULL;
 	return commit;
 }
diff --git a/notes-utils.c b/notes-utils.c
index 9107c37..7bb3473 100644
--- a/notes-utils.c
+++ b/notes-utils.c
@@ -18,7 +18,7 @@ void create_notes_commit(struct notes_tree *t, struct commit_list *parents,
 		unsigned char parent_sha1[20];
 		if (!read_ref(t->ref, parent_sha1)) {
 			struct commit *parent = lookup_commit(parent_sha1);
-			if (!parent || parse_commit(parent))
+			if (parse_commit(parent))
 				die("Failed to find/parse commit %s", t->ref);
 			commit_list_insert(parent, &parents);
 		}
diff --git a/sha1_name.c b/sha1_name.c
index 0e5fe7f..1dfc401 100644
--- a/sha1_name.c
+++ b/sha1_name.c
@@ -582,8 +582,6 @@ static int get_parent(const char *name, int len,
 	if (ret)
 		return ret;
 	commit = lookup_commit_reference(sha1);
-	if (!commit)
-		return -1;
 	if (parse_commit(commit))
 		return -1;
 	if (!idx) {
-- 
1.8.4.1.898.g8bf8a41.dirty

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