add: migration from main exe

add: sql files embedded in exe

.gitignore

@@ -2,4 +2,6 @@ build
 cmake-build-debug
 .idea
 
+sql/*.h
+
 core.sqlite

CMakeLists.txt

@@ -61,5 +61,8 @@ endforeach()
 include_directories(${CMAKE_CURRENT_SOURCE_DIR})
 add_executable(core ${SRC_DIR} ${CTL_SRC} ${FILTER_SRC} ${VIEWSRC} ${PLUGIN_SRC} ${MODEL_SRC} ${HELPER_SRC})
 
+add_custom_target(compiled_migrations ${CMAKE_CURRENT_SOURCE_DIR}/compile_migrations.sh)
+add_dependencies(core compiled_migrations)
+
 add_subdirectory(drogon)
 target_link_libraries(${PROJECT_NAME} PRIVATE drogon)

compile_migrations.sh

@@ -0,0 +1,13 @@
+#!/usr/bin/env bash
+
+cd "$(dirname "$0")";
+
+migration_num=0;
+
+while [ -f sql/migration_$migration_num.sql ]
+do
+  xxd -i sql/migration_$migration_num.sql | sed 's/\([0-9a-f]\)$/\0, 0x00/' > sql/migration_$migration_num.h
+  ((migration_num++));
+done;
+
+cd $PWD;

helpers.h

@@ -35,6 +35,9 @@ namespace helpers
 
     int
     open_tcp_connection(char* host, char* port);
+
+    int
+    migrate_sql();
 }
 
 #endif //EMGAUWA_CORE_HELPERS_H

helpers/migrate_sql.cc

@@ -0,0 +1,63 @@
+#include <helpers.h>
+#include <globals.h>
+#include <drogon/trantor/trantor/utils/Logger.h>
+
+#include <config.h>
+
+#include <sql/migration_0.h>
+
+int
+helpers::migrate_sql()
+{
+    uint16_t version_num = 0;
+    int s, rc;
+    sqlite3_stmt *stmt;
+    sqlite3_prepare_v2(globals::db, "SELECT version_num FROM meta LIMIT 1;", -1, &stmt, nullptr);
+    s = sqlite3_step(stmt);
+    if (s == SQLITE_ROW)
+    {
+        version_num = sqlite3_column_int(stmt, 0);
+    }
+    else
+    {
+        version_num = 0;
+    }
+
+    uint16_t new_version_num = version_num;
+    char* err_msg;
+    char* sql;
+
+    sqlite3_finalize(stmt);
+
+    switch(version_num)
+    {
+        case 0:
+            rc = sqlite3_exec(globals::db, (const char *)sql_migration_0_sql, nullptr, nullptr, &err_msg);
+            if(rc != 0)
+            {
+                LOG_FATAL << "Couldn't migrate LEVEL 0 (" << err_msg << ")";
+                break;
+            }
+            new_version_num = 1;
+        default:
+            break;
+    }
+
+    if(version_num == 0)
+    {
+        sqlite3_prepare_v2(globals::db, "INSERT INTO meta (version_num) VALUES (?1);", -1, &stmt, nullptr);
+    }
+    else
+    {
+        sqlite3_prepare_v2(globals::db, "UPDATE meta SET version_num=?1;", -1, &stmt, nullptr);
+    }
+    sqlite3_bind_int(stmt, 1, new_version_num);
+
+    rc = sqlite3_step(stmt);
+    if (rc != SQLITE_DONE)
+    {
+        LOG_FATAL << "Couldn't write new Schema Version";
+    }
+
+    return rc == SQLITE_DONE;
+}

main.cc

@@ -46,6 +46,11 @@ main()
         return 1;
     }
 
+    if(!helpers::migrate_sql())
+    {
+        terminate(1);
+    }
+
     //Load config file
     drogon::app().loadConfigFile("config.json");
 

schema-migration.sh

@@ -1,27 +0,0 @@
-#!/usr/bin/env bash
-
-sqlite_return=$(sqlite3 core.sqlite "SELECT version_num FROM meta LIMIT 1;" 2>/dev/null);
-
-if ! [[ $sqlite_return =~ ^-?[0-9]+$ ]]
-then
-  echo "No version number found. Initiating database."
-  sqlite_return=0;
-fi;
-
-version_num=$sqlite_return;
-
-while [ -f sql/migration_$version_num.sql ]
-do
-  echo "sql/migration_$version_num.sql";
-  sqlite3 core.sqlite < sql/migration_$version_num.sql;
-  ((version_num++));
-done;
-
-echo "New Schemaversion: $version_num";
-
-if [ $sqlite_return -eq 0 ]
-then
-  sqlite3 core.sqlite "INSERT INTO meta (version_num) VALUES ($version_num); ";
-else
-  sqlite3 core.sqlite "UPDATE meta SET version_num=$version_num;";
-fi