Update script search logic for new file extension

When searching for script files, look for both the new and old file
extensions.  If a file with ".zeek" can't be found, then search for
a file with ".bro" as a fallback.

src/Debug.cc

@@ -348,7 +348,7 @@ vector<ParseLocationRec> parse_location_string(const string& s)
 			if ( ! sscanf(line_string.c_str(), "%d", &plr.line) )
 				plr.type = plrUnknown;
 
-			string path(find_file(filename, bro_path(), "bro"));
+			string path(find_script_file(filename, bro_path()));
 
 			if ( path.empty() )
 				{

src/OSFinger.cc

@@ -295,7 +295,7 @@ void OSFingerprint::load_config(const char* file)
   char buf[MAXLINE];
   char* p;
 
-  FILE* c = open_file(find_file(file, bro_path(), "osf"));
+  FILE* c = open_file(find_file(file, bro_path(), ".osf"));
 
   if (!c)
     {

src/RuleMatcher.cc

@@ -235,7 +235,7 @@ bool RuleMatcher::ReadFiles(const name_list& files)
 
 	for ( int i = 0; i < files.length(); ++i )
 		{
-		rules_in = open_file(find_file(files[i], bro_path(), "sig"));
+		rules_in = open_file(find_file(files[i], bro_path(), ".sig"));
 
 		if ( ! rules_in )
 			{

src/broxygen/ScriptInfo.cc

@@ -158,7 +158,7 @@ static string make_redef_details(const string& heading, char underline,
 ScriptInfo::ScriptInfo(const string& arg_name, const string& arg_path)
     : Info(),
       name(arg_name), path(arg_path),
-      is_pkg_loader(SafeBasename(name).result == PACKAGE_LOADER),
+      is_pkg_loader(is_package_loader(SafeBasename(name).result)),
       dependencies(), module_usages(), comments(), id_info(),
       redef_options(), constants(), state_vars(), types(), events(), hooks(),
       functions(), redefs()
@@ -314,7 +314,7 @@ string ScriptInfo::DoReStructuredText(bool roles_only) const
 			if ( it != dependencies.begin() )
 				rval += ", ";
 
-			string path = find_file(*it, bro_path(), "bro");
+			string path = find_script_file(*it, bro_path());
 			string doc = *it;
 
 			if ( ! path.empty() && is_dir(path.c_str()) )
@@ -365,8 +365,13 @@ time_t ScriptInfo::DoGetModificationTime() const
 
 		if ( ! info )
 			{
-			string pkg_name = *it + "/" + PACKAGE_LOADER;
+			for (const string& ext : script_extensions)
+				{
+				string pkg_name = *it + "/__load__" + ext;
 				info = broxygen_mgr->GetScriptInfo(pkg_name);
+				if ( info )
+					break;
+				}
 
 			if ( ! info )
 				reporter->InternalWarning("Broxygen failed to get mtime of %s",

src/broxygen/Target.cc

@@ -410,7 +410,7 @@ void ScriptTarget::DoFindDependencies(const vector<Info*>& infos)
 
 	for ( size_t i = 0; i < script_deps.size(); ++i )
 		{
-		if ( SafeBasename(script_deps[i]->Name()).result == PACKAGE_LOADER )
+		if ( is_package_loader(SafeBasename(script_deps[i]->Name()).result) )
 			{
 			string pkg_dir = SafeDirname(script_deps[i]->Name()).result;
 			string target_file = Name() + pkg_dir + "/index.rst";

src/plugin/Manager.cc

@@ -13,6 +13,7 @@
 #include "../Reporter.h"
 #include "../Func.h"
 #include "../Event.h"
+#include "../util.h"
 
 using namespace plugin;
 
@@ -182,30 +183,44 @@ bool Manager::ActivateDynamicPluginInternal(const std::string& name, bool ok_if_
 		add_to_bro_path(scripts);
 		}
 
+	string init;
+
 	// First load {scripts}/__preload__.bro automatically.
-	string init = dir + "scripts/__preload__.bro";
+	for (const string& ext : script_extensions)
+		{
+		init = dir + "scripts/__preload__" + ext;
 
 		if ( is_file(init) )
 			{
 			DBG_LOG(DBG_PLUGINS, "  Loading %s", init.c_str());
 			scripts_to_load.push_back(init);
+			break;
+			}
 		}
 
 	// Load {bif,scripts}/__load__.bro automatically.
-	init = dir + "lib/bif/__load__.bro";
+	for (const string& ext : script_extensions)
+		{
+		init = dir + "lib/bif/__load__" + ext;
 
 		if ( is_file(init) )
 			{
 			DBG_LOG(DBG_PLUGINS, "  Loading %s", init.c_str());
 			scripts_to_load.push_back(init);
+			break;
+			}
 		}
 
-	init = dir + "scripts/__load__.bro";
+	for (const string& ext : script_extensions)
+		{
+		init = dir + "scripts/__load__" + ext;
 
 		if ( is_file(init) )
 			{
 			DBG_LOG(DBG_PLUGINS, "  Loading %s", init.c_str());
 			scripts_to_load.push_back(init);
+			break;
+			}
 		}
 
 	// Load shared libraries.

src/scan.l

@@ -77,6 +77,17 @@ static string find_relative_file(const string& filename, const string& ext)
 		return find_file(filename, bro_path(), ext);
 	}
 
+static string find_relative_script_file(const string& filename)
+	{
+	if ( filename.empty() )
+		return string();
+
+	if ( filename[0] == '.' )
+		return find_script_file(filename, SafeDirname(::filename).result);
+	else
+		return find_script_file(filename, bro_path());
+	}
+
 static ino_t get_inode_num(FILE* f, const string& path)
 	{
 	struct stat b;
@@ -363,14 +374,14 @@ when	return TOK_WHEN;
 @load{WS}{FILE}	{
 	const char* new_file = skip_whitespace(yytext + 5);	// Skip "@load".
 	string loader = ::filename;  // load_files may change ::filename, save copy
-	string loading = find_relative_file(new_file, "bro");
+	string loading = find_relative_script_file(new_file);
 	(void) load_files(new_file);
 	broxygen_mgr->ScriptDependency(loader, loading);
 	}
 
 @load-sigs{WS}{FILE} {
 	const char* file = skip_whitespace(yytext + 10);
-	string path = find_relative_file(file, "sig");
+	string path = find_relative_file(file, ".sig");
 	int rc = PLUGIN_HOOK_WITH_RESULT(HOOK_LOAD_FILE, HookLoadFile(plugin::Plugin::SIGNATURES, file, path), -1);
 
 	switch ( rc ) {
@@ -430,7 +441,7 @@ when	return TOK_WHEN;
 @unload{WS}{FILE}	{
 	// Skip "@unload".
 	const char* file = skip_whitespace(yytext + 7);
-	string path = find_relative_file(file, "bro");
+	string path = find_relative_script_file(file);
 
 	if ( path.empty() )
 		reporter->Error("failed find file associated with @unload %s", file);
@@ -624,7 +635,7 @@ static bool already_scanned(const string& path)
 
 static int load_files(const char* orig_file)
 	{
-	string file_path = find_relative_file(orig_file, "bro");
+	string file_path = find_relative_script_file(orig_file);
 	int rc = PLUGIN_HOOK_WITH_RESULT(HOOK_LOAD_FILE, HookLoadFile(plugin::Plugin::SCRIPT, orig_file, file_path), -1);
 
 	if ( rc == 1 )
@@ -970,7 +981,7 @@ int yywrap()
 
 			string canon = without_bropath_component(it->name);
 			string flat = flatten_script_name(canon, prefixes[i]);
-			string path = find_relative_file(flat, "bro");
+			string path = find_relative_script_file(flat);
 
 			if ( ! path.empty() )
 				{

src/util.cc

@@ -20,6 +20,7 @@
 #endif
 
 #include <string>
+#include <array>
 #include <vector>
 #include <algorithm>
 #include <ctype.h>
@@ -1007,7 +1008,18 @@ string bro_prefixes()
 	return rval;
 	}
 
-const char* PACKAGE_LOADER = "__load__.bro";
+const array<string, 2> script_extensions = {".zeek", ".bro"};
+
+bool is_package_loader(const string& path)
+	{
+	for (const string& ext : script_extensions)
+		{
+		if (path == "__load__" + ext)
+			return true;
+		}
+
+	return false;
+	}
 
 FILE* open_file(const string& path, const string& mode)
 	{
@@ -1034,13 +1046,22 @@ static bool can_read(const string& path)
 FILE* open_package(string& path, const string& mode)
 	{
 	string arg_path = path;
-	path.append("/").append(PACKAGE_LOADER);
+	path.append("/__load__");
 
-	if ( can_read(path) )
+	for (const string& ext : script_extensions)
+		{
+		string p = path + ext;
+		if ( can_read(p) )
+			{
+			path.append(ext);
 			return open_file(path, mode);
+			}
+		}
 
+	path.append(script_extensions[0]);
+	string package_loader = "__load__" + script_extensions[0];
 	reporter->Error("Failed to open package '%s': missing '%s' file",
-	                arg_path.c_str(), PACKAGE_LOADER);
+	                arg_path.c_str(), package_loader.c_str());
 	return 0;
 	}
 
@@ -1123,7 +1144,7 @@ string flatten_script_name(const string& name, const string& prefix)
 	if ( ! rval.empty() )
 		rval.append(".");
 
-	if ( SafeBasename(name).result == PACKAGE_LOADER )
+	if ( is_package_loader(SafeBasename(name).result) )
 		rval.append(SafeDirname(name).result);
 	else
 		rval.append(name);
@@ -1221,7 +1242,7 @@ string without_bropath_component(const string& path)
 	}
 
 static string find_file_in_path(const string& filename, const string& path,
-                                const string& opt_ext = "")
+                                const vector<string>& opt_ext)
 	{
 	if ( filename.empty() )
 		return string();
@@ -1239,11 +1260,14 @@ static string find_file_in_path(const string& filename, const string& path,
 
 	if ( ! opt_ext.empty() )
 		{
-		string with_ext = abs_path + '.' + opt_ext;
+		for (const string& ext : opt_ext)
+			{
+			string with_ext = abs_path + ext;
 
 			if ( can_read(with_ext) )
 				return with_ext;
 			}
+		}
 
 	if ( can_read(abs_path) )
 		return abs_path;
@@ -1257,9 +1281,31 @@ string find_file(const string& filename, const string& path_set,
 	vector<string> paths;
 	tokenize_string(path_set, ":", &paths);
 
+	vector<string> ext;
+	if ( ! opt_ext.empty() )
+		ext.push_back(opt_ext);
+
 	for ( size_t n = 0; n < paths.size(); ++n )
 		{
-		string f = find_file_in_path(filename, paths[n], opt_ext);
+		string f = find_file_in_path(filename, paths[n], ext);
+
+		if ( ! f.empty() )
+			return f;
+		}
+
+	return string();
+	}
+
+string find_script_file(const string& filename, const string& path_set)
+	{
+	vector<string> paths;
+	tokenize_string(path_set, ":", &paths);
+
+	vector<string> ext(script_extensions.begin(), script_extensions.end());
+
+	for ( size_t n = 0; n < paths.size(); ++n )
+		{
+		string f = find_file_in_path(filename, paths[n], ext);
 
 		if ( ! f.empty() )
 			return f;

src/util.h

@@ -26,6 +26,7 @@
 #include <stdint.h>
 
 #include <string>
+#include <array>
 #include <vector>
 #include <stdio.h>
 #include <stdlib.h>
@@ -248,16 +249,16 @@ static const SourceID SOURCE_BROKER = 0xffffffff;
 extern void pinpoint();
 extern int int_list_cmp(const void* v1, const void* v2);
 
-// Contains the name of the script file that gets read
-// when a package is loaded (i.e., "__load__.bro).
-extern const char* PACKAGE_LOADER;
-
 extern const std::string& bro_path();
 extern const char* bro_magic_path();
 extern const char* bro_plugin_path();
 extern const char* bro_plugin_activate();
 extern std::string bro_prefixes();
 
+extern const std::array<std::string, 2> script_extensions;
+
+bool is_package_loader(const std::string& path);
+
 extern void add_to_bro_path(const std::string& dir);
 
 
@@ -341,6 +342,14 @@ std::string without_bropath_component(const std::string& path);
 std::string find_file(const std::string& filename, const std::string& path_set,
                       const std::string& opt_ext = "");
 
+/**
+ * Locate a script file within a given search path.
+ * @param filename Name of a file to find.
+ * @param path_set Colon-delimited set of paths to search for the file.
+ * @return Path to the found file, or an empty string if not found.
+ */
+std::string find_script_file(const std::string& filename, const std::string& path_set);
+
 // Wrapper around fopen(3).  Emits an error when failing to open.
 FILE* open_file(const std::string& path, const std::string& mode = "r");