Remove option to link separately-built libraft

Makefile.am

@@ -8,11 +8,6 @@ if DQLITE_NEXT_ENABLED
 AM_CFLAGS += -DDQLITE_NEXT
 endif
 
-if !BUILD_RAFT_ENABLED
-AM_CFLAGS += $(RAFT_CFLAGS) -DUSE_SYSTEM_RAFT
-AM_LDFLAGS += $(RAFT_LIBS)
-endif
-
 if DEBUG_ENABLED
 AM_CFLAGS += -O0
 else
@@ -72,7 +67,6 @@ libdqlite_la_CFLAGS = $(AM_CFLAGS) -fvisibility=hidden -DRAFT_API=''
 libdqlite_la_LDFLAGS = $(AM_LDFLAGS) -version-info 0:1:0
 libdqlite_la_SOURCES = $(basic_dqlite_sources)
 
-if BUILD_RAFT_ENABLED
 libraft_la_SOURCES = \
   src/raft/byte.c \
   src/raft/callbacks.c \
@@ -126,7 +120,6 @@ libraft_la_SOURCES = \
   src/raft/uv_writer.c
 
 libdqlite_la_SOURCES += $(libraft_la_SOURCES)
-endif # BUILD_RAFT_ENABLED
 
 check_PROGRAMS = unit-test integration-test
 
@@ -174,9 +167,7 @@ unit_test_CFLAGS = $(AM_CFLAGS) -Wno-unknown-warning-option -Wno-uninitialized -
 unit_test_LDFLAGS = $(AM_LDFLAGS)
 unit_test_LDADD = libtest.la
 
-if BUILD_RAFT_ENABLED
 unit_test_LDADD += libraft.la
-endif
 
 integration_test_SOURCES = \
   test/integration/test_client.c \
@@ -192,7 +183,6 @@ integration_test_CFLAGS = $(AM_CFLAGS) -Wno-conversion
 integration_test_LDFLAGS = $(AM_LDFLAGS) -no-install
 integration_test_LDADD = libtest.la libdqlite.la
 
-if BUILD_RAFT_ENABLED
 check_LTLIBRARIES += libraft.la
 
 check_PROGRAMS += \
@@ -336,8 +326,6 @@ raft_core_unit_test_CFLAGS += -DLZ4_ENABLED
 libraft_la_CFLAGS += -DLZ4_ENABLED
 endif
 
-endif # BUILD_RAFT_ENABLED
-
 if BUILD_SQLITE_ENABLED
 noinst_LTLIBRARIES = libsqlite3.la
 libsqlite3_la_SOURCES = sqlite3.c

configure.ac

@@ -36,12 +36,17 @@ AM_CONDITIONAL(BACKTRACE_ENABLED, test "x$enable_backtrace" = "xyes")
 AC_ARG_ENABLE(build-sqlite, AS_HELP_STRING([--enable-build-sqlite[=ARG]], [build libsqlite3 from sqlite3.c in the build root [default=no]]))
 AM_CONDITIONAL(BUILD_SQLITE_ENABLED, test "x$enable_build_sqlite" = "xyes")
 
-AC_ARG_ENABLE(build-raft, AS_HELP_STRING([--enable-build-raft[=ARG]], [use the bundled raft sources instead of linking to libraft [default=no]]))
-AM_CONDITIONAL(BUILD_RAFT_ENABLED, test "x$enable_build_raft" = "xyes")
+AC_ARG_ENABLE([build-raft],
+  [AS_HELP_STRING([--enable-build-raft[=ARG]],
+		  [use the bundled raft sources instead of linking libraft (default is yes, required)])],
+  [enable_build_raft=$enableval],
+  [enable_build_raft=yes])
+AS_IF([test "x$enable_build_raft" != "xyes"],
+      AC_MSG_ERROR([linking to a separately-built libraft is no longer supported]),
+      [])
 
 AC_ARG_ENABLE(dqlite-next, AS_HELP_STRING([--enable-dqlite-next[=ARG]], [build with the experimental dqlite backend [default=no]]))
 AM_CONDITIONAL(DQLITE_NEXT_ENABLED, test "x$enable_dqlite_next" = "xyes")
-AS_IF([test "x$enable_build_raft" != "xyes" -a "x$enable_dqlite_next" = "xyes"], [AC_MSG_ERROR([dqlite-next requires bundled raft])], [])
 
 # Whether to enable code coverage.
 AX_CODE_COVERAGE
@@ -60,24 +65,15 @@ AC_SYS_LARGEFILE
 # Checks for libraries
 PKG_CHECK_MODULES(SQLITE, [sqlite3 >= 3.22.0], [], [])
 PKG_CHECK_MODULES(UV, [libuv >= 1.34.0], [], [])
-AS_IF([test "x$enable_build_raft" != "xyes"], [PKG_CHECK_MODULES(RAFT, [raft >= 0.18.1], [], [])], [])
-
 
 # Allow not linking to liblz4 even if it's present.
 AC_ARG_WITH([lz4], AS_HELP_STRING([--without-lz4], [never link to liblz4]))
-AS_IF([test "x$enable_build_raft" = "xyes"],
-      # Building raft
-      [AS_IF([test "x$with_lz4" != "xno"],
-	     [PKG_CHECK_MODULES(LZ4, [liblz4 >= 1.7.1], [have_lz4=yes], [have_lz4=no])],
-	     [have_lz4=no])
-       AS_IF([test "x$with_lz4" != "xno" -a "x$have_lz4" = "xno"],
-	     [AC_MSG_ERROR([liblz4 required but not found])],
-	     [])],
-      # Not building raft
-      [AS_IF([test "x$with_lz4" = "xyes"],
-	     [AC_MSG_ERROR([linking lz4 doesn't make sense unless building raft])],
-	     [])
-      have_lz4=no])
+AS_IF([test "x$with_lz4" != "xno"],
+     [PKG_CHECK_MODULES(LZ4, [liblz4 >= 1.7.1], [have_lz4=yes], [have_lz4=no])],
+     [have_lz4=no])
+AS_IF([test "x$with_lz4" != "xno" -a "x$have_lz4" = "xno"],
+     [AC_MSG_ERROR([liblz4 required but not found])],
+     [])
 
 AM_CONDITIONAL(LZ4_AVAILABLE, test "x$have_lz4" = "xyes")
 

src/leader.c

@@ -224,11 +224,7 @@ static void leaderMaybeCheckpointLegacy(struct leader *l)
 		tracef("raft_malloc - no mem");
 		goto err_after_buf_alloc;
 	}
-#ifdef USE_SYSTEM_RAFT
-	rv = raft_apply(l->raft, apply, &buf, 1, leaderCheckpointApplyCb);
-#else
 	rv = raft_apply(l->raft, apply, &buf, NULL, 1, leaderCheckpointApplyCb);
-#endif
 	if (rv != 0) {
 		tracef("raft_apply failed %d", rv);
 		raft_free(apply);
@@ -337,13 +333,9 @@ static int leaderApplyFrames(struct exec *req,
 	apply->type = COMMAND_FRAMES;
 	idSet(apply->req.req_id, req->id);
 
-#ifdef USE_SYSTEM_RAFT
-	rv = raft_apply(l->raft, &apply->req, &buf, 1, leaderApplyFramesCb);
-#else
 	/* TODO actual WAL slice goes here */
 	struct raft_entry_local_data local_data = {};
 	rv = raft_apply(l->raft, &apply->req, &buf, &local_data, 1, leaderApplyFramesCb);
-#endif
 	if (rv != 0) {
 		tracef("raft apply failed %d", rv);
 		goto err_after_command_encode;

src/raft.h

@@ -1,11 +1,4 @@
-#if defined(USE_SYSTEM_RAFT)
-
-#include <raft.h>
-#include <raft/uv.h>
-#include <raft/fixture.h>
-
-#elif !defined(RAFT_H)
-
+#ifndef RAFT_H
 #define RAFT_H
 
 #include <stdarg.h>

src/server.c

@@ -1078,15 +1078,8 @@ int dqlite_node_describe_last_entry(dqlite_node *n,
 	raft_term *t = (raft_term *)term;
 	int rv;
 
-#ifdef USE_SYSTEM_RAFT
-	(void)i;
-	(void)t;
-	(void)rv;
-	return DQLITE_ERROR;
-#else
 	rv = raft_io_describe_last_entry(&n->raft_io, i, t);
 	return rv == 0 ? 0 : DQLITE_ERROR;
-#endif
 }
 
 dqlite_node_id dqlite_generate_node_id(const char *address)

test/integration/test_cluster.c

@@ -134,6 +134,7 @@ TEST(cluster, dataOnNewNode, setUp, tearDown, 0, cluster_params)
 	    strtol(munit_parameters_get(params, "num_records"), NULL, 0);
 	unsigned id = 2;
 	const char *address = "@2";
+	int rv;
 
 	HANDSHAKE;
 	OPEN;
@@ -159,8 +160,6 @@ TEST(cluster, dataOnNewNode, setUp, tearDown, 0, cluster_params)
 	struct test_server *first = &f->servers[0];
 	test_server_stop(first);
 	test_server_prepare(first, params);
-#ifndef USE_SYSTEM_RAFT
-	int rv;
 	/* One entry per INSERT, plus one for the initial configuration, plus
 	 * one for the CREATE TABLE, plus one legacy checkpoint command entry
 	 * after 993 records or two after 2200 records. */
@@ -179,7 +178,6 @@ TEST(cluster, dataOnNewNode, setUp, tearDown, 0, cluster_params)
 	munit_assert_uint64(expected_entries, <=, last_entry_index);
 	munit_assert_uint64(last_entry_index, <, expected_entries + max_barriers);
 	munit_assert_uint64(last_entry_term, ==, 1);
-#endif
 	test_server_run(first);
 
 	/* The full table is visible from the new node */
@@ -199,15 +197,13 @@ TEST(cluster, dataOnNewNode, setUp, tearDown, 0, cluster_params)
 	struct test_server *second = &f->servers[1];
 	test_server_stop(second);
 	test_server_prepare(second, params);
-#ifndef USE_SYSTEM_RAFT
 	rv = dqlite_node_describe_last_entry(second->dqlite,
 					     &last_entry_index,
 					     &last_entry_term);
 	munit_assert_int(rv, ==, 0);
 	munit_assert_uint64(expected_entries + 1, <=, last_entry_index);
 	munit_assert_uint64(last_entry_index, <, expected_entries + max_barriers + 1);
 	munit_assert_uint64(last_entry_term, ==, 1);
-#endif
 	test_server_run(second);
 	return MUNIT_OK;
 }
@@ -332,8 +328,6 @@ TEST(cluster, modifyingQuerySql, setUp, tearDown, 0, cluster_params)
 	return MUNIT_OK;
 }
 
-#ifndef USE_SYSTEM_RAFT
-
 /* Edge cases for dqlite_node_describe_last_entry. */
 TEST(cluster, last_entry_edge_cases, setUp, tearDown, 0, NULL)
 {
@@ -368,5 +362,3 @@ TEST(cluster, last_entry_edge_cases, setUp, tearDown, 0, NULL)
 
 	return MUNIT_OK;
 }
-
-#endif