config/Block: GetPath() throws exception on error

src/config/Block.cxx

@@ -23,6 +23,7 @@
 #include "ConfigPath.hxx"
 #include "system/FatalError.hxx"
 #include "fs/AllocatedPath.hxx"
+#include "util/RuntimeError.hxx"
 #include "util/Error.hxx"
 
 #include <assert.h>
@@ -91,11 +92,8 @@ ConfigBlock::GetBlockValue(const char *name, const char *default_value) const
 }
 
 AllocatedPath
-ConfigBlock::GetPath(const char *name, const char *default_value,
-		     Error &error) const
+ConfigBlock::GetPath(const char *name, const char *default_value) const
 {
-	assert(!error.IsDefined());
-
 	int line2 = line;
 	const char *s;
 
@@ -110,20 +108,15 @@ ConfigBlock::GetPath(const char *name, const char *default_value,
 		s = default_value;
 	}
 
+	Error error;
 	AllocatedPath path = ParsePath(s, error);
 	if (gcc_unlikely(path.IsNull()))
-		error.FormatPrefix("Invalid path in \"%s\" at line %i: ",
-				   name, line2);
+		throw FormatRuntimeError("Invalid path in \"%s\" at line %i: %s",
+					 name, line2, error.GetMessage());
 
 	return path;
 }
 
-AllocatedPath
-ConfigBlock::GetPath(const char *name, Error &error) const
-{
-	return GetPath(name, nullptr, error);
-}
-
 int
 ConfigBlock::GetBlockValue(const char *name, int default_value) const
 {

src/config/Block.hxx

@@ -111,11 +111,11 @@ struct ConfigBlock {
 	/**
 	 * Same as config_get_path(), but looks up the setting in the
 	 * specified block.
+	 *
+	 * Throws #std::runtime_error on error.
 	 */
-	AllocatedPath GetPath(const char *name, const char *default_value,
-			      Error &error) const;
-
-	AllocatedPath GetPath(const char *name, Error &error) const;
+	AllocatedPath GetPath(const char *name,
+			      const char *default_value=nullptr) const;
 
 	gcc_pure
 	int GetBlockValue(const char *name, int default_value) const;

src/db/plugins/simple/SimpleDatabasePlugin.cxx

@@ -78,39 +78,27 @@ inline SimpleDatabase::SimpleDatabase(AllocatedPath &&_path,
 Database *
 SimpleDatabase::Create(gcc_unused EventLoop &loop,
 		       gcc_unused DatabaseListener &listener,
-		       const ConfigBlock &block, Error &error)
+		       const ConfigBlock &block, Error &)
 {
 	SimpleDatabase *db = new SimpleDatabase();
-	if (!db->Configure(block, error)) {
-		delete db;
-		db = nullptr;
-	}
-
+	db->Configure(block);
 	return db;
 }
 
-bool
-SimpleDatabase::Configure(const ConfigBlock &block, Error &error)
+void
+SimpleDatabase::Configure(const ConfigBlock &block)
 {
-	path = block.GetPath("path", error);
-	if (path.IsNull()) {
-		if (!error.IsDefined())
-			error.Set(simple_db_domain,
-				  "No \"path\" parameter specified");
-		return false;
-	}
+	path = block.GetPath("path");
+	if (path.IsNull())
+		throw std::runtime_error("No \"path\" parameter specified");
 
 	path_utf8 = path.ToUTF8();
 
-	cache_path = block.GetPath("cache_directory", error);
-	if (path.IsNull() && error.IsDefined())
-		return false;
+	cache_path = block.GetPath("cache_directory");
 
 #ifdef ENABLE_ZLIB
 	compress = block.GetBlockValue("compress", compress);
 #endif
-
-	return true;
 }
 
 void

src/db/plugins/simple/SimpleDatabasePlugin.hxx

@@ -133,7 +133,7 @@ public:
 	}
 
 private:
-	bool Configure(const ConfigBlock &block, Error &error);
+	void Configure(const ConfigBlock &block);
 
 	void Check() const;
 

src/decoder/plugins/SidplayDecoderPlugin.cxx

@@ -85,12 +85,9 @@ static bool
 sidplay_init(const ConfigBlock &block)
 {
 	/* read the songlengths database file */
-	Error error;
-	const auto database_path = block.GetPath("songlength_database", error);
+	const auto database_path = block.GetPath("songlength_database");
 	if (!database_path.IsNull())
 		songlength_database = sidplay_load_songlength_db(database_path);
-	else if (error.IsDefined())
-		FatalError(error);
 
 	default_songlength = block.GetBlockValue("default_songlength", 0u);
 

src/decoder/plugins/WildmidiDecoderPlugin.cxx

@@ -40,13 +40,9 @@ static constexpr unsigned WILDMIDI_SAMPLE_RATE = 48000;
 static bool
 wildmidi_init(const ConfigBlock &block)
 {
-	Error error;
 	const AllocatedPath path =
 		block.GetPath("config_file",
-			      "/etc/timidity/timidity.cfg",
-			      error);
-	if (path.IsNull())
-		FatalError(error);
+			      "/etc/timidity/timidity.cfg");
 
 	if (!FileExists(path)) {
 		const auto utf8 = path.ToUTF8();

src/output/plugins/FifoOutputPlugin.cxx

@@ -183,14 +183,10 @@ FifoOutput::Create(const ConfigBlock &block, Error &error)
 {
 	FifoOutput *fd = new FifoOutput();
 
-	fd->path = block.GetPath("path", error);
+	fd->path = block.GetPath("path");
 	if (fd->path.IsNull()) {
 		delete fd;
-
-		if (!error.IsDefined())
-			error.Set(config_domain,
-				  "No \"path\" parameter specified");
-		return nullptr;
+		throw std::runtime_error("No \"path\" parameter specified");
 	}
 
 	fd->path_utf8 = fd->path.ToUTF8();

src/output/plugins/RecorderOutputPlugin.cxx

@@ -128,9 +128,7 @@ RecorderOutput::Configure(const ConfigBlock &block, Error &error)
 		return false;
 	}
 
-	path = block.GetPath("path", error);
-	if (error.IsDefined())
-		return false;
+	path = block.GetPath("path");
 
 	const char *fmt = block.GetBlockValue("format_path", nullptr);
 	if (fmt != nullptr)