Add JDBC URL option TC_COPY_FILE, copying files to container

docs/modules/databases/jdbc.md

@@ -84,6 +84,18 @@ public class JDBCDriverTest {
     ...
 ```
 
+### Copying files to the container
+
+You may copy files into the container by specifying `TC_COPY_FILES`.
+This is useful for supplying custom configuration files or utilizing the entrypoint of a Docker image to run scripts.
+
+The syntax is: `?TC_COPY_FILES=host-path:container-path[:file-mode]` (file mode is optional).
+If the host path starts with `/` it will be considered an absolute path, otherwise it's mapped from a classpath resource. 
+
+* Single file: `jdbc:tc:mysql:5.7.34:///databasename?TC_COPY_FILES=some-path/init_mysql.sql:/docker-entrypoint-initdb.d/init_mysql.sql`
+* Single file with file mode: `jdbc:tc:mysql:5.7.34:///databasename?TC_COPY_FILES=some-path/init_mysql.sql:/docker-entrypoint-initdb.d/init_mysql.sql:755`
+* Multiple files: `jdbc:tc:mysql:5.7.34:///databasename?TC_COPY_FILES=some-path/init_mysql.sql:/docker-entrypoint-initdb.d/init_mysql.sql:755,/absolute-path/another-file:/another/container-path/another-file`
+
 ### Running container in daemon mode
 
 By default database container is being stopped as soon as last connection is closed. There are cases when you might need to start container and keep it running till you stop it explicitly or JVM is shutdown. To do this, add `TC_DAEMON` parameter to the URL as follows:

modules/jdbc-test/src/main/java/org/testcontainers/jdbc/AbstractJDBCDriverTest.java

@@ -22,6 +22,7 @@ public class AbstractJDBCDriverTest {
     protected enum Options {
         ScriptedSchema,
         CharacterSet,
+        CopyFiles,
         CustomIniFile,
         JDBCParams,
         PmdKnownBroken,
@@ -63,7 +64,7 @@ public void test() throws SQLException {
                 performTestForCharacterEncodingForInitialScriptConnection(dataSource);
             }
 
-            if (options.contains(Options.CustomIniFile)) {
+            if (options.contains(Options.CopyFiles) || options.contains(Options.CustomIniFile)) {
                 performTestForCustomIniFile(dataSource);
             }
         }
@@ -204,13 +205,13 @@ private HikariDataSource verifyCharacterSet(String jdbcUrl) throws SQLException
     private void performTestForCustomIniFile(HikariDataSource dataSource) throws SQLException {
         assumeFalse(SystemUtils.IS_OS_WINDOWS);
         Statement statement = dataSource.getConnection().createStatement();
-        statement.execute("SELECT @@GLOBAL.innodb_file_format");
+        statement.execute("SELECT @@GLOBAL.key_buffer_size");
         ResultSet resultSet = statement.getResultSet();
 
         assertThat(resultSet.next()).as("The query returns a result").isTrue();
         String result = resultSet.getString(1);
 
-        assertThat(result).as("The InnoDB file format has been set by the ini file content").isEqualTo("Barracuda");
+        assertThat(result).as("The InnoDB file format has been set by the ini file content").isEqualTo("32768");
     }
 
     private HikariDataSource getDataSource(String jdbcUrl, int poolSize) {

modules/jdbc/src/main/java/org/testcontainers/jdbc/ConnectionUrl.java

@@ -4,9 +4,13 @@
 import lombok.EqualsAndHashCode;
 import lombok.Getter;
 import org.testcontainers.UnstableAPI;
+import org.testcontainers.utility.MountableFile;
 
+import java.util.ArrayList;
+import java.util.Arrays;
 import java.util.Collections;
 import java.util.HashMap;
+import java.util.List;
 import java.util.Map;
 import java.util.Objects;
 import java.util.Optional;
@@ -61,6 +65,8 @@ public class ConnectionUrl {
 
     private Map<String, String> tmpfsOptions = new HashMap<>();
 
+    private Map<String, List<MountableFile>> copyFilesToContainerOptions = Collections.emptyMap();
+
     public static ConnectionUrl newInstance(final String url) {
         ConnectionUrl connectionUrl = new ConnectionUrl(url);
         connectionUrl.parseUrl();
@@ -135,6 +141,8 @@ private void parseUrl() {
 
         tmpfsOptions = parseTmpfsOptions(containerParameters);
 
+        copyFilesToContainerOptions = parseCopyFilesToContainerOptions(containerParameters);
+
         initScriptPath = Optional.ofNullable(containerParameters.get("TC_INITSCRIPT"));
 
         reusable = Boolean.parseBoolean(containerParameters.get("TC_REUSABLE"));
@@ -160,6 +168,31 @@ private Map<String, String> parseTmpfsOptions(Map<String, String> containerParam
             .collect(Collectors.toMap(string -> string.split(":")[0], string -> string.split(":")[1]));
     }
 
+    private Map<String, List<MountableFile>> parseCopyFilesToContainerOptions(Map<String, String> containerParameters) {
+        if (!containerParameters.containsKey("TC_COPY_FILES")) {
+            return Collections.emptyMap();
+        }
+
+        String copyFilesToContainerOptions = containerParameters.get("TC_COPY_FILES");
+
+        Map<String, List<MountableFile>> mounts = new HashMap<>();
+        Arrays
+            .stream(copyFilesToContainerOptions.split(","))
+            .map(string -> string.split(":"))
+            .forEach(split -> {
+                String hostPath = split[0];
+                String containerPath = split[1];
+                Integer mode = split.length > 2 ? Integer.parseInt(split[2], 8) : null;
+                MountableFile mountableFile = (hostPath.startsWith("/"))
+                    ? MountableFile.forHostPath(hostPath, mode)
+                    : MountableFile.forClasspathResource(hostPath, mode);
+                mounts.putIfAbsent(containerPath, new ArrayList<>());
+                mounts.get(containerPath).add(mountableFile);
+            });
+
+        return mounts;
+    }
+
     /**
      * Get the TestContainers Parameters such as Init Function, Init Script path etc.
      *
@@ -201,6 +234,10 @@ public Map<String, String> getTmpfsOptions() {
         return Collections.unmodifiableMap(tmpfsOptions);
     }
 
+    public Map<String, List<MountableFile>> getCopyFilesToContainerOptions() {
+        return Collections.unmodifiableMap(copyFilesToContainerOptions);
+    }
+
     /**
      * This interface defines the Regex Patterns used by {@link ConnectionUrl}.
      *

modules/jdbc/src/main/java/org/testcontainers/jdbc/ContainerDatabaseDriver.java

@@ -108,6 +108,15 @@ public synchronized Connection connect(String url, final Properties info) throws
                     if (candidateContainerType.supports(connectionUrl.getDatabaseType())) {
                         container = candidateContainerType.newInstance(connectionUrl);
                         container.withTmpFs(connectionUrl.getTmpfsOptions());
+
+                        JdbcDatabaseContainer finalContainer = container;
+                        connectionUrl
+                            .getCopyFilesToContainerOptions()
+                            .forEach((containerPath, mountableFiles) -> {
+                                mountableFiles.forEach(mountableFile -> {
+                                    finalContainer.withCopyFileToContainer(mountableFile, containerPath);
+                                });
+                            });
                         delegate = container.getJdbcDriverInstance();
                     }
                 }

modules/jdbc/src/test/java/org/testcontainers/jdbc/ConnectionUrlTest.java

@@ -3,6 +3,7 @@
 import org.junit.Rule;
 import org.junit.Test;
 import org.junit.rules.ExpectedException;
+import org.testcontainers.utility.MountableFile;
 
 import static org.assertj.core.api.Assertions.assertThat;
 
@@ -68,6 +69,62 @@ public void testTmpfsOption() {
         assertThat(url.getTmpfsOptions()).as("tmpfs option key1 has correct value").containsEntry("key1", "value1");
     }
 
+    @Test
+    public void testCopyFilesOption() {
+        String urlString =
+            "jdbc:tc:mysql://somehostname/databasename?TC_COPY_FILES=/key:path1,logback-test.xml:path2:755";
+        ConnectionUrl url = ConnectionUrl.newInstance(urlString);
+
+        assertThat(url.getQueryParameters()).as("Connection Parameters set is empty").isEmpty();
+        assertThat(url.getContainerParameters()).as("Container Parameters set is not empty").isNotEmpty();
+        assertThat(url.getContainerParameters())
+            .as("Container Parameter TC_COPY_FILES is true")
+            .containsEntry("TC_COPY_FILES", "/key:path1,logback-test.xml:path2:755");
+        assertThat(url.getCopyFilesToContainerOptions())
+            .as("copyFiles option has correct values")
+            .containsOnlyKeys("path1", "path2");
+
+        assertThat(url.getCopyFilesToContainerOptions())
+            .as("copyFiles option path1 has correct value")
+            .extractingByKey("path1")
+            .asList()
+            .hasSize(1);
+        assertThat(url.getCopyFilesToContainerOptions())
+            .as("copyFiles option path1 has correct value")
+            .extractingByKey("path1")
+            .asList()
+            .element(0)
+            .extracting("filesystemPath")
+            .isEqualTo("/key");
+        assertThat(url.getCopyFilesToContainerOptions())
+            .as("copyFiles option path1 has correct value")
+            .extractingByKey("path1")
+            .asList()
+            .element(0)
+            .extracting("fileMode")
+            .isEqualTo(0100000 | 0644);
+
+        assertThat(url.getCopyFilesToContainerOptions())
+            .as("copyFiles option path1 has correct value")
+            .extractingByKey("path2")
+            .asList()
+            .hasSize(1);
+        assertThat(url.getCopyFilesToContainerOptions())
+            .as("copyFiles option path1 has correct value")
+            .extractingByKey("path2")
+            .asList()
+            .element(0)
+            .extracting("filesystemPath")
+            .isEqualTo(MountableFile.forClasspathResource("logback-test.xml").getFilesystemPath());
+        assertThat(url.getCopyFilesToContainerOptions())
+            .as("copyFiles option path1 has correct value")
+            .extractingByKey("path2")
+            .asList()
+            .element(0)
+            .extracting("fileMode")
+            .isEqualTo(0100000 | 0755);
+    }
+
     @Test
     public void testInitScriptPathCapture() {
         String urlString =

modules/mysql/src/test/java/org/testcontainers/jdbc/mysql/MySQLJDBCDriverTest.java

@@ -45,6 +45,10 @@ public static Iterable<Object[]> data() {
                     "jdbc:tc:mysql:5.6.51://hostname/databasename?TC_MY_CNF=somepath/mysql_conf_override",
                     EnumSet.of(Options.CustomIniFile),
                 },
+                {
+                    "jdbc:tc:mysql://hostname/databasename?TC_COPY_FILES=somepath/mysql_conf_override/my.cnf:/etc/mysql/conf.d/mysqld.cnf",
+                    EnumSet.of(Options.CopyFiles),
+                },
             }
         );
     }

modules/mysql/src/test/resources/somepath/mysql_conf_override/my.cnf

@@ -3,7 +3,7 @@ user = mysql
 port   		= 3306
 #socket 		= /tmp/mysql.sock
 skip-external-locking
-key_buffer_size = 16K
+key_buffer_size = 32K
 max_allowed_packet = 1M
 table_open_cache = 4
 sort_buffer_size = 64K
@@ -51,4 +51,4 @@ innodb_buffer_pool_size = 16M
 innodb_log_file_size = 5M
 innodb_log_buffer_size = 8M
 innodb_flush_log_at_trx_commit = 1
-innodb_lock_wait_timeout = 50
+innodb_lock_wait_timeout = 50