From bda91af9d315d1abee2f9d5fb6053f1befeaa30f Mon Sep 17 00:00:00 2001
From: Jonathan Xu <jonathan.xu@seafile.com>
Date: Mon, 24 Jun 2019 15:04:27 +0800
Subject: [PATCH] Make mysqlclient dependency optional.

---
 common/seaf-db.c    | 10 ++++++++++
 common/seaf-utils.c |  6 ++++++
 configure.ac        | 11 ++++++++---
 3 files changed, 24 insertions(+), 3 deletions(-)

diff --git a/common/seaf-db.c b/common/seaf-db.c
index 998d876..83a8366 100644
--- a/common/seaf-db.c
+++ b/common/seaf-db.c
@@ -6,7 +6,9 @@
 #include "seaf-db.h"
 
 #include <stdarg.h>
+#ifdef HAVE_MYSQL
 #include <mysql.h>
+#endif
 #include <sqlite3.h>
 #include <pthread.h>
 
@@ -43,6 +45,8 @@ typedef struct DBOperations {
 
 static DBOperations db_ops;
 
+#ifdef HAVE_MYSQL
+
 /* MySQL Ops */
 static SeafDB *
 mysql_db_new (const char *host,
@@ -105,6 +109,8 @@ seaf_db_new_mysql (const char *host,
     return db;
 }
 
+#endif
+
 /* SQLite Ops */
 static SeafDB *
 sqlite_db_new (const char *db_path);
@@ -500,6 +506,8 @@ seaf_db_trans_foreach_selected_row (SeafDBTrans *trans, const char *sql,
     return ret;
 }
 
+#ifdef HAVE_MYSQL
+
 /* MySQL DB */
 
 typedef struct MySQLDB {
@@ -936,6 +944,8 @@ mysql_db_row_get_column_int64 (SeafDBRow *vrow, int idx)
     return ret;
 }
 
+#endif  /* HAVE_MYSQL */
+
 /* SQLite DB */
 
 /* SQLite thread synchronization rountines.
diff --git a/common/seaf-utils.c b/common/seaf-utils.c
index fc6066c..ef1c750 100644
--- a/common/seaf-utils.c
+++ b/common/seaf-utils.c
@@ -51,6 +51,8 @@ sqlite_db_start (SeafileSession *session)
     return 0;
 }
 
+#ifdef HAVE_MYSQL
+
 #define MYSQL_DEFAULT_PORT 3306
 
 static int
@@ -124,6 +126,8 @@ mysql_db_start (SeafileSession *session)
     return 0;
 }
 
+#endif
+
 #ifdef HAVE_POSTGRESQL
 
 static int
@@ -197,9 +201,11 @@ load_database_config (SeafileSession *session)
     if (!type || strcasecmp (type, "sqlite") == 0) {
         ret = sqlite_db_start (session);
     }
+#ifdef HAVE_MYSQL
     else if (strcasecmp (type, "mysql") == 0) {
         ret = mysql_db_start (session);
     }
+#endif
 #ifdef HAVE_POSTGRESQL
     else if (strcasecmp (type, "pgsql") == 0) {
         ret = pgsql_db_start (session);
diff --git a/configure.ac b/configure.ac
index d18c2b5..0795526 100644
--- a/configure.ac
+++ b/configure.ac
@@ -228,12 +228,17 @@ AC_SUBST(ZLIB_CFLAGS)
 AC_SUBST(ZLIB_LIBS)
 
 if test "x${MYSQL_CONFIG}" = "xdefault_mysql_config"; then
-    PKG_CHECK_MODULES(MYSQL, [mysqlclient])
-    AC_SUBST(MYSQL_CFLAGS)
-    AC_SUBST(MYSQL_LIBS)
+    PKG_CHECK_MODULES(MYSQL, [mysqlclient], [have_mysql="yes"], [have_mysql="no"])
+    if test "x${have_mysql}" = "xyes"; then
+        AC_SUBST(MYSQL_CFLAGS)
+        AC_SUBST(MYSQL_LIBS)
+        AC_DEFINE([HAVE_MYSQL], 1, [Define to 1 if MySQL support is enabled])
+    fi
 else
+    AC_MSG_CHECKING([for MySQL])
     MYSQL_CFLAGS=`${MYSQL_CONFIG} --include`
     MYSQL_LIBS=`${MYSQL_CONFIG} --libs`
+    AC_MSG_RESULT([${MYSQL_CFLAGS}])
     AC_SUBST(MYSQL_CFLAGS)
     AC_SUBST(MYSQL_LIBS)
 fi