Remove support for .bro script extension and BRO_ environment variables

src/plugin/Manager.cc

@@ -257,44 +257,29 @@ bool Manager::ActivateDynamicPluginInternal(const std::string& name, bool ok_if_
 	string init;
 
 	// First load {scripts}/__preload__.zeek automatically.
-	for (const string& ext : util::detail::script_extensions)
-		{
-		init = dir + "scripts/__preload__" + ext;
+	init = dir + "scripts/__preload__.zeek";
 
 	if ( util::is_file(init) )
 		{
 		DBG_LOG(DBG_PLUGINS, "  Loading %s", init.c_str());
-			util::detail::warn_if_legacy_script(init);
 		scripts_to_load.push_back(init);
-			break;
-			}
 		}
 
 	// Load {bif,scripts}/__load__.zeek automatically.
-	for (const string& ext : util::detail::script_extensions)
-		{
-		init = dir + "lib/bif/__load__" + ext;
+	init = dir + "lib/bif/__load__.zeek";
 
 	if ( util::is_file(init) )
 		{
 		DBG_LOG(DBG_PLUGINS, "  Loading %s", init.c_str());
-			util::detail::warn_if_legacy_script(init);
 		scripts_to_load.push_back(init);
-			break;
-			}
 		}
 
-	for (const string& ext : util::detail::script_extensions)
-		{
-		init = dir + "scripts/__load__" + ext;
+	init = dir + "scripts/__load__.zeek";
 
 	if ( util::is_file(init) )
 		{
 		DBG_LOG(DBG_PLUGINS, "  Loading %s", init.c_str());
-			util::detail::warn_if_legacy_script(init);
 		scripts_to_load.push_back(init);
-			break;
-			}
 		}
 
 	// Mark this plugin as activated by clearing the path.

src/util.cc

@@ -581,17 +581,6 @@ uint64_t rand64bit()
 	return base;
 	}
 
-const array<string, 2> script_extensions = {".zeek", ".bro"};
-
-void warn_if_legacy_script(std::string_view filename)
-	{
-	if ( ends_with(filename, ".bro") )
-		{
-		std::string x(filename);
-		reporter->Warning("Loading script '%s' with legacy extension, support for '.bro' will be removed in Zeek v4.1", x.c_str());
-		}
-	}
-
 TEST_CASE("util is_package_loader")
 	{
 	CHECK(is_package_loader("/some/path/__load__.zeek") == true);
@@ -601,17 +590,7 @@ TEST_CASE("util is_package_loader")
 bool is_package_loader(const string& path)
 	{
 	string filename(std::move(SafeBasename(path).result));
-
-	for ( const string& ext : script_extensions )
-		{
-		if ( filename == "__load__" + ext )
-			{
-			warn_if_legacy_script(filename);
-			return true;
-			}
-		}
-
-	return false;
+	return ( filename == "__load__.zeek" );
 	}
 
 void add_to_zeek_path(const string& dir)
@@ -627,19 +606,15 @@ FILE* open_package(string& path, const string& mode)
 	string arg_path = path;
 	path.append("/__load__");
 
-	for ( const string& ext : script_extensions )
-		{
-		string p = path + ext;
+	string p = path + ".zeek";
 	if ( can_read(p) )
 		{
-			warn_if_legacy_script(path);
-			path.append(ext);
+		path.append(".zeek");
 		return open_file(path, mode);
 		}
-		}
 
-	path.append(script_extensions[0]);
-	string package_loader = "__load__" + script_extensions[0];
+	path.append(".zeek");
+	string package_loader = "__load__.zeek";
 	reporter->Error("Failed to open package '%s': missing '%s' file",
 	                arg_path.c_str(), package_loader.c_str());
 	return nullptr;
@@ -2008,28 +1983,15 @@ string find_script_file(const string& filename, const string& path_set)
 	vector<string> paths;
 	tokenize_string(path_set, ":", &paths);
 
-	vector<string> ext(detail::script_extensions.begin(), detail::script_extensions.end());
+	vector<string> ext = {".zeek"};
 
 	for ( size_t n = 0; n < paths.size(); ++n )
 		{
 		string f = find_file_in_path(filename, paths[n], ext);
 
 		if ( ! f.empty() )
-			{
-			detail::warn_if_legacy_script(f);
 			return f;
 		}
-		}
-
-	if ( ends_with(filename, ".bro") )
-		{
-		detail::warn_if_legacy_script(filename);
-
-		// We were looking for a file explicitly ending in .bro and didn't
-		// find it, so fall back to one ending in .zeek, if it exists.
-		auto fallback = string(filename.data(), filename.size() - 4) + ".zeek";
-		return find_script_file(fallback, path_set);
-		}
 
 	return string();
 	}
@@ -2404,17 +2366,7 @@ char* zeekenv(const char* name)
 	if ( it == legacy_vars.end() )
 		return rval;
 
-	auto val = getenv(it->second);
-
-	if ( val && starts_with(it->second, "BRO_") )
-		{
-		if ( reporter )
-			reporter->Warning("Using legacy environment variable %s, support will be removed in Zeek v4.1; use %s instead", it->second, name);
-		else
-			fprintf(stderr, "Using legacy environment variable %s, support will be removed in Zeek v4.1; use %s instead\n", it->second, name);
-		}
-
-	return val;
+	return getenv(it->second);
 	}
 
 static string json_escape_byte(char c)

src/util.h

@@ -174,11 +174,6 @@ constexpr SourceID SOURCE_LOCAL = 0;
 // indicating whether it's a local or remote event.
 constexpr SourceID SOURCE_BROKER = 0xffffffff;
 
-extern const std::array<std::string, 2> script_extensions;
-
-/** Prints a warning if the filename ends in .bro. */
-void warn_if_legacy_script(std::string_view filename);
-
 bool is_package_loader(const std::string& path);
 
 extern void add_to_zeek_path(const std::string& dir);

src/zeekygen/ScriptInfo.cc

@@ -468,13 +468,8 @@ time_t ScriptInfo::DoGetModificationTime() const
 
 		if ( ! info )
 			{
-			for (const string& ext : util::detail::script_extensions)
-				{
-				string pkg_name = *it + "/__load__" + ext;
+			string pkg_name = *it + "/__load__.zeek";
 			info = zeek::detail::zeekygen_mgr->GetScriptInfo(pkg_name);
-				if ( info )
-					break;
-				}
 
 			if ( ! info )
 				reporter->InternalWarning("Zeekygen failed to get mtime of %s",

testing/btest/Baseline/core.load-prefixes/output

@@ -1,5 +1,4 @@
 ### BTest baseline data generated by btest-diff. Do not edit. Use "btest -U/-u" to update. Requires BTest >= 0.63.
 loaded lcl2.base.utils.site.zeek
 loaded lcl.base.utils.site.zeek
-loaded lcl2.base.protocols.http.bro
 loaded lcl.base.protocols.http.zeek

testing/btest/Baseline/core.load-unload/output2

@@ -1,2 +1 @@
 ### BTest baseline data generated by btest-diff. Do not edit. Use "btest -U/-u" to update. Requires BTest >= 0.63.
-Loaded: dontloadme.bro

testing/btest/core/load-explicit-bro-suffix-fallback.zeek

@@ -1,12 +0,0 @@
-# @TEST-EXEC: zeek -b %INPUT >out 2>&1
-# @TEST-EXEC: TEST_DIFF_CANONIFIER=$SCRIPTS/diff-remove-abspath btest-diff out
-
-# We don't have a foo.bro, but we'll accept foo.zeek.
-@load foo.bro
-
-@TEST-START-FILE foo.zeek
-event zeek_init()
-	{
-	print "loaded foo.zeek";
-	}
-@TEST-END-FILE

testing/btest/core/load-file-extension.zeek

@@ -1,34 +1,11 @@
 # Test loading scripts with different file extensions.
 #
-# Test that either ".zeek" or ".bro" can be loaded without specifying extension
-# @TEST-EXEC: cp x/foo.bro .
-# @TEST-EXEC: zeek -b load_foo > bro_only
-# @TEST-EXEC: btest-diff bro_only
-# @TEST-EXEC: rm foo.bro
-#
+# Test that ".zeek" can be loaded without specifying extension
 # @TEST-EXEC: cp x/foo.zeek .
 # @TEST-EXEC: zeek -b load_foo > zeek_only
 # @TEST-EXEC: btest-diff zeek_only
 # @TEST-EXEC: rm foo.zeek
 #
-# Test that ".zeek" is the preferred file extension, unless ".bro" is specified
-# @TEST-EXEC: cp x/foo.* .
-# @TEST-EXEC: cp x2/foo .
-# @TEST-EXEC: zeek -b load_foo > zeek_preferred
-# @TEST-EXEC: btest-diff zeek_preferred
-#
-# @TEST-EXEC: zeek -b load_foo_bro > bro_preferred
-# @TEST-EXEC: btest-diff bro_preferred
-# @TEST-EXEC: rm foo*
-#
-# Test that ".bro" is preferred over a script with no file extension (when
-# there is no ".zeek" script)
-# @TEST-EXEC: cp x/foo.bro .
-# @TEST-EXEC: cp x2/foo .
-# @TEST-EXEC: zeek -b load_foo > bro_preferred_2
-# @TEST-EXEC: btest-diff bro_preferred_2
-# @TEST-EXEC: rm foo*
-#
 # Test that a script with no file extension can be loaded
 # @TEST-EXEC: cp x2/foo .
 # @TEST-EXEC: zeek -b load_foo > no_extension
@@ -55,19 +32,11 @@
 @load foo
 @TEST-END-FILE
 
-@TEST-START-FILE load_foo_bro
-@load foo.bro
-@TEST-END-FILE
-
 @TEST-START-FILE load_foo_xyz
 @load foo.xyz
 @TEST-END-FILE
 
 
-@TEST-START-FILE x/foo.bro
-print "Bro script loaded";
-@TEST-END-FILE
-
 @TEST-START-FILE x/foo.zeek
 print "Zeek script loaded";
 @TEST-END-FILE

testing/btest/core/load-pkg.zeek

@@ -1,23 +1,13 @@
 # Test that package loading works when a package loader script is present.
 #
-# Test that ".zeek" is loaded when there is also a ".bro"
+# Test that ".zeek" is loaded
 # @TEST-EXEC: zeek -b foo >output
 # @TEST-EXEC: btest-diff output
 #
-# Test that ".bro" is loaded when there is no ".zeek"
-# @TEST-EXEC: rm foo/__load__.zeek
-# @TEST-EXEC: zeek -b foo >output2
-# @TEST-EXEC: btest-diff output2
-#
 # Test that package cannot be loaded when no package loader script exists.
-# @TEST-EXEC: rm foo/__load__.bro
+# @TEST-EXEC: rm foo/__load__.zeek
 # @TEST-EXEC-FAIL: zeek -b foo
 
-@TEST-START-FILE foo/__load__.bro
-@load ./test
-print "__load__.bro loaded";
-@TEST-END-FILE
-
 @TEST-START-FILE foo/__load__.zeek
 @load ./test
 print "__load__.zeek loaded";

testing/btest/core/load-prefixes.zeek

@@ -18,12 +18,7 @@ print "loaded lcl.base.utils.site.zeek";
 print "loaded lcl2.base.utils.site.zeek";
 @TEST-END-FILE
 
-# For a script package like base/protocols/http/, either of the recognized
-# file extensions can be loaded here.
+# For a script package like base/protocols/http/, verify the package can be loaded.
 @TEST-START-FILE lcl.base.protocols.http.zeek
 print "loaded lcl.base.protocols.http.zeek";
 @TEST-END-FILE
-
-@TEST-START-FILE lcl2.base.protocols.http.bro
-print "loaded lcl2.base.protocols.http.bro";
-@TEST-END-FILE

testing/btest/core/load-unload.zeek

@@ -1,15 +1,9 @@
 # This tests the @unload directive
 #
 # Test that @unload works with ".bro" when there is no ".zeek" script
-# @TEST-EXEC: zeek -b unloadbro misc/loaded-scripts dontloadmebro > output
+# @TEST-EXEC: zeek -b unload misc/loaded-scripts dontloadme > output
 # @TEST-EXEC: btest-diff output
-# @TEST-EXEC: grep dontloadmebro loaded_scripts.log && exit 1 || exit 0
-#
-# Test that @unload looks for ".zeek" first (assuming no file extension is
-# specified in the @unload)
-# @TEST-EXEC: zeek -b unload misc/loaded-scripts dontloadme.zeek dontloadme.bro > output2
-# @TEST-EXEC: btest-diff output2
-# @TEST-EXEC: grep dontloadme.bro loaded_scripts.log
+# @TEST-EXEC: grep dontloadme loaded_scripts.log && exit 1 || exit 0
 
 @TEST-START-FILE unloadbro.bro
 @unload dontloadmebro
@@ -30,3 +24,4 @@ print "Loaded: dontloadme.zeek";
 @TEST-START-FILE dontloadme.bro
 print "Loaded: dontloadme.bro";
 @TEST-END-FILE
+z