disable archive API without plugins

When there are no archive plugins, we do not need the archive API at
all.  Drop all its overhead.

configure.ac

@@ -217,6 +217,16 @@ if test x$enable_iso = xyes; then
 	AC_DEFINE(HAVE_ISO, 1, [Define to have iso archive support])
 fi
 
+dnl archive API
+if test x$enable_bz2 = xyes || test x$enable_zip = xyes || test x$enable_iso = xyes; then
+	enable_archive=yes
+	AC_DEFINE(ENABLE_ARCHIVE, 1, [The archive API is available])
+else
+	enable_archive=no
+fi
+
+AM_CONDITIONAL(ENABLE_ARCHIVE, test x$enable_archive = xyes)
+
 
 dnl
 dnl decoder plugins

src/Makefile.am

@@ -158,10 +158,7 @@ mpd_SOURCES = \
 	volume.c \
 	locate.c \
 	stored_playlist.c \
-	timer.c \
+	timer.c
-	archive_api.c \
-	archive_list.c \
-	input_archive.c
 
 if HAVE_LIBSAMPLERATE
 mpd_SOURCES += pcm_resample_libsamplerate.c
@@ -187,6 +184,14 @@ if HAVE_ISO
 mpd_SOURCES += archive/iso_plugin.c
 endif
 
+if ENABLE_ARCHIVE
+mpd_SOURCES += \
+	archive_api.c \
+	archive_list.c \
+	input_archive.c
+endif
+
+
 # decoder plugins
 
 if HAVE_MAD

src/input_stream.c

@@ -20,7 +20,10 @@
 #include "config.h"
 
 #include "input_file.h"
+
+#ifdef ENABLE_ARCHIVE
 #include "input_archive.h"
+#endif
 
 #ifdef HAVE_CURL
 #include "input_curl.h"
@@ -31,7 +34,9 @@
 
 static const struct input_plugin *const input_plugins[] = {
 	&input_plugin_file,
+#ifdef ENABLE_ARCHIVE
 	&input_plugin_archive,
+#endif
 #ifdef HAVE_CURL
 	&input_plugin_curl,
 #endif

src/ls.c

@@ -84,6 +84,7 @@ hasMusicSuffix(const char *utf8file, unsigned int next)
 	return ret;
 }
 
+#ifdef ENABLE_ARCHIVE
 const struct archive_plugin *
 get_archive_by_suffix(const char *utf8file)
 {
@@ -98,3 +99,4 @@ get_archive_by_suffix(const char *utf8file)
 	}
 	return ret;
 }
+#endif

src/main.c

@@ -40,7 +40,6 @@
 #include "permission.h"
 #include "replay_gain.h"
 #include "decoder_list.h"
-#include "archive_list.h"
 #include "audioOutput.h"
 #include "input_stream.h"
 #include "state_file.h"
@@ -52,6 +51,10 @@
 #include "main_notify.h"
 #include "os_compat.h"
 
+#ifdef ENABLE_ARCHIVE
+#include "archive_list.h"
+#endif
+
 #include <glib.h>
 
 #ifdef HAVE_LOCALE
@@ -147,10 +150,12 @@ static void version(void)
 	     "Supported outputs:\n");
 	printAllOutputPluginTypes(stdout);
 
+#ifdef ENABLE_ARCHIVE
 	puts("\n"
 	     "Supported archives:\n");
 	archive_plugin_init_all();
 	archive_plugin_print_all_suffixes(stdout);
+#endif
 }
 
 static void parseOptions(int argc, char **argv, Options * options)
@@ -421,7 +426,9 @@ int main(int argc, char *argv[])
 	mapper_init();
 	initPermissions();
 	initPlaylist();
+#ifdef ENABLE_ARCHIVE
 	archive_plugin_init_all();
+#endif
 	decoder_plugin_init_all();
 	update_global_init();
 
@@ -507,7 +514,9 @@ int main(int argc, char *argv[])
 	command_finish();
 	update_global_finish();
 	decoder_plugin_deinit_all();
+#ifdef ENABLE_ARCHIVE
 	archive_plugin_deinit_all();
+#endif
 	music_pipe_free();
 	cleanUpPidFile();
 	finishConf();

src/update.c

@@ -276,6 +276,7 @@ make_subdir(struct directory *parent, const char *name)
 	return directory;
 }
 
+#ifdef ENABLE_ARCHIVE
 static void
 update_archive_tree(struct directory *directory, char *name)
 {
@@ -308,6 +309,7 @@ update_archive_tree(struct directory *directory, char *name)
 		}
 	}
 }
+#endif
 
 static bool
 updateDirectory(struct directory *directory, const struct stat *st);
@@ -316,7 +318,10 @@ static void
 updateInDirectory(struct directory *directory,
 		  const char *name, const struct stat *st)
 {
+#ifdef ENABLE_ARCHIVE
 	const struct archive_plugin *archive;
+#endif
+
 	assert(strchr(name, '/') == NULL);
 
 	if (S_ISREG(st->st_mode) && hasMusicSuffix(name, 0)) {
@@ -351,6 +356,7 @@ updateInDirectory(struct directory *directory,
 		ret = updateDirectory(subdir, st);
 		if (!ret)
 			delete_directory(subdir);
+#ifdef ENABLE_ARCHIVE
 	} else if (S_ISREG(st->st_mode) && (archive = get_archive_by_suffix(name))) {
 		struct archive_file *archfile;
 		char pathname[MPD_PATH_MAX];
@@ -380,6 +386,7 @@ updateInDirectory(struct directory *directory,
 		} else {
 			g_warning("unable to open archive %s\n", pathname);
 		}
+#endif
 	} else {
 		g_debug("update: %s is not a directory, archive or music\n", name);
 	}