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-rwxr-xr-xtests/t0108-patch.sh37
-rw-r--r--ui-patch.c6
2 files changed, 42 insertions, 1 deletions
diff --git a/tests/t0108-patch.sh b/tests/t0108-patch.sh
new file mode 100755
index 0000000..33351d6
--- /dev/null
+++ b/tests/t0108-patch.sh
@@ -0,0 +1,37 @@
+#!/bin/sh
+
+. ./setup.sh
+
+prepare_tests "Check content on patch page"
+
+run_test 'generate foo/patch' '
+	cgit_query "url=foo/patch" >trash/tmp
+'
+
+run_test 'find `From:` line' '
+	grep -e "^From: " trash/tmp
+'
+
+run_test 'find `Date:` line' '
+	grep -e "^Date: " trash/tmp
+'
+
+run_test 'find `Subject:` line' '
+	grep -e "^Subject: commit 5" trash/tmp
+'
+
+run_test 'find `cgit` signature' '
+	 tail -1 trash/tmp | grep -e "^cgit"
+'
+
+run_test 'find initial commit' '
+	root=$(git --git-dir=$PWD/trash/repos/foo/.git rev-list HEAD | tail -1)
+'
+
+run_test 'generate patch for initial commit' '
+	cgit_query "url=foo/patch&id=$root" >trash/tmp
+'
+
+run_test 'find `cgit` signature' '
+	tail -1 trash/tmp | grep -e "^cgit"
+'
diff --git a/ui-patch.c b/ui-patch.c
index e7a010a..7ee2c41 100644
--- a/ui-patch.c
+++ b/ui-patch.c
@@ -88,7 +88,11 @@ void cgit_print_patch(char *hex, struct cacheitem *item)
 		return;
 	}
 	info = cgit_parse_commit(commit);
-	hashcpy(old_sha1, commit->parents->item->object.sha1);
+
+	if (commit->parents && commit->parents->item)
+		hashcpy(old_sha1, commit->parents->item->object.sha1);
+	else
+		hashclr(old_sha1);
 
 	patchname = fmt("%s.patch", sha1_to_hex(sha1));
 	cgit_print_snapshot_start("text/plain", patchname, item);