Add method to search for potential DCPs.v1.10.13

4 files changed, 123 insertions, 0 deletions

diff --git a/src/search.cc b/src/search.cc
index e7871dc6..09e4d3ce 100644
--- a/src/search.cc
+++ b/src/search.cc
@@ -93,3 +93,37 @@ dcp::find_and_resolve_cpls (vector<boost::filesystem::path> const& directories,
 	return cpls;
 }
 
+
+
+static
+void
+find_potential_dcps(boost::filesystem::path path, vector<boost::filesystem::path>& dcp)
+{
+	bool found = false;
+	try {
+		found = dcp::filesystem::exists(path / "ASSETMAP") || dcp::filesystem::exists(path / "ASSETMAP.xml");
+	} catch (...) {}
+
+	if (found) {
+		dcp.push_back(path);
+	} else if (boost::filesystem::is_directory(path)) {
+		for (auto i: boost::filesystem::directory_iterator(path)) {
+			try {
+				find_potential_dcps(i.path(), dcp);
+			} catch (...) {}
+		}
+	}
+}
+
+
+/** Search a directory recursively and return directories within that could be DCPs (because they
+ *  contain ASSETMAP or ASSETMAP.xml)
+ */
+vector<boost::filesystem::path>
+dcp::find_potential_dcps(boost::filesystem::path directory)
+{
+	vector<boost::filesystem::path> dcp;
+	::find_potential_dcps(directory, dcp);
+	return dcp;
+}
+
diff --git a/src/search.h b/src/search.h
index c7199d44..0d8a7405 100644
--- a/src/search.h
+++ b/src/search.h
@@ -32,9 +32,19 @@
 */
 
 
+#include <boost/filesystem.hpp>
+#include <memory>
+#include <vector>
+
+
 namespace dcp {
 
+
+class CPL;
+
+
 extern std::vector<std::shared_ptr<dcp::CPL>> find_and_resolve_cpls (std::vector<boost::filesystem::path> const& directories, bool tolerant);
+extern std::vector<boost::filesystem::path> find_potential_dcps(boost::filesystem::path directory);
 
 }
 
diff --git a/test/search_test.cc b/test/search_test.cc
new file mode 100644
index 00000000..92136654
--- /dev/null
+++ b/test/search_test.cc
@@ -0,0 +1,78 @@
+/*
+    Copyright (C) 2025 Carl Hetherington <cth@carlh.net>
+
+    This file is part of libdcp.
+
+    libdcp is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    libdcp is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with libdcp.  If not, see <http://www.gnu.org/licenses/>.
+
+    In addition, as a special exception, the copyright holders give
+    permission to link the code of portions of this program with the
+    OpenSSL library under certain conditions as described in each
+    individual source file, and distribute linked combinations
+    including the two.
+
+    You must obey the GNU General Public License in all respects
+    for all of the code used other than OpenSSL.  If you modify
+    file(s) with this exception, you may extend this exception to your
+    version of the file(s), but you are not obligated to do so.  If you
+    do not wish to do so, delete this exception statement from your
+    version.  If you delete this exception statement from all source
+    files in the program, then also delete it here.
+*/
+
+
+#include "search.h"
+#include "util.h"
+#include <boost/test/unit_test.hpp>
+
+
+using std::vector;
+
+
+/* boost::filesystem::permissions does not work on Windows as we need. Let's hope the test on
+ * Linux/macOS finds problems.
+ */
+
+#ifndef LIBDCP_WINDOWS
+
+BOOST_AUTO_TEST_CASE(find_potential_dcps_test)
+{
+	auto dir = boost::filesystem::path("build/test/find_potential_dcps_test");
+
+	boost::filesystem::remove_all(dir);
+	boost::filesystem::create_directories(dir);
+
+	boost::filesystem::create_directories(dir / "foo");
+	dcp::write_string_to_file("foo", dir / "foo" / "ASSETMAP");
+
+	boost::filesystem::create_directories(dir / "bar" / "baz");
+	dcp::write_string_to_file("foo", dir / "bar" / "baz" / "ASSETMAP.xml");
+
+	boost::filesystem::create_directories(dir / "fred" / "jim" / "sheila" / "brian");
+	dcp::write_string_to_file("foo", dir / "fred" / "jim" / "sheila" / "brian" / "ASSETMAP.xml");
+
+	boost::filesystem::create_directories(dir / "fred" / "jim" / "sophie");
+	dcp::write_string_to_file("foo", dir / "fred" / "jim" / "sophie" / "ASSETMAP.xml");
+
+	boost::filesystem::permissions(dir / "fred" / "jim" / "sheila", boost::filesystem::remove_perms | boost::filesystem::owner_read | boost::filesystem::owner_exe);
+
+	auto dcp = dcp::find_potential_dcps(dir);
+
+	boost::filesystem::permissions(dir / "fred" / "jim" / "sheila", boost::filesystem::add_perms | boost::filesystem::owner_read | boost::filesystem::owner_exe);
+
+	BOOST_REQUIRE_EQUAL(dcp.size(), 3U);
+}
+
+#endif
+
diff --git a/test/wscript b/test/wscript
index f8286d05..86ccbca6 100644
--- a/test/wscript
+++ b/test/wscript
@@ -109,6 +109,7 @@ def build(bld):
                  rgb_xyz_test.cc
                  round_trip_test.cc
                  scope_guard_test.cc
+                 search_test.cc
                  shared_subtitle_test.cc
                  smpte_load_font_test.cc
                  smpte_subtitle_test.cc