basic POC functionality established for peer module loading

dpmdk/include/CommonModuleAPI.hpp

@@ -170,74 +170,7 @@ extern "C" {
  */
 #define DPM_VERSION "0.1.0"
 
-// If we're building in standalone mode, add support for standalone execution
+// If we're building in standalone mode, include the standalone implementations
 #ifdef BUILD_STANDALONE
-
-// Declare, but don't define the standalone implementations
-// These will be defined in the main file through the DPM_STANDALONE_IMPL macro
-
-/**
- * @brief Helper macro to create a standalone main function for modules
- *
- * This macro defines a main() function that initializes the module and
- * processes command-line arguments to execute commands directly.
- */
-#define DPM_MODULE_STANDALONE_MAIN() \
-extern "C" void dpm_log(int level, const char* message) { \
-const char* level_str; \
-switch (level) { \
-case 0: level_str = "FATAL"; break; \
-case 1: level_str = "ERROR"; break; \
-case 2: level_str = "WARN"; break; \
-case 3: level_str = "INFO"; break; \
-case 4: level_str = "DEBUG"; break; \
-default: level_str = "UNKNOWN"; break; \
-} \
-std::cout << "[" << level_str << "] " << message << std::endl; \
-} \
-extern "C" void dpm_con(int level, const char* message) { \
-const char* level_str; \
-switch (level) { \
-case 0: level_str = "FATAL"; break; \
-case 1: level_str = "ERROR"; break; \
-case 2: level_str = "WARN"; break; \
-case 3: level_str = "INFO"; break; \
-case 4: level_str = "DEBUG"; break; \
-default: level_str = "UNKNOWN"; break; \
-} \
-std::cout << "[" << level_str << "] " << message << std::endl; \
-} \
-extern "C" const char* dpm_get_config(const char* section, const char* key) { \
-if (!section || !key) return nullptr; \
-\
-/* Create environment variable name in format SECTION_KEY */ \
-std::string env_name = std::string(section) + "_" + std::string(key); \
-\
-/* Check if environment variable exists */ \
-const char* env_value = getenv(env_name.c_str()); \
-return env_value; /* Will be null if env var doesn't exist */ \
-} \
-extern "C" void dpm_set_logging_level(int level) { \
-std::cout << "[INFO] Verbosity level ignored, as all standalone executions have maximum verbosity" << std::endl; \
-} \
-extern "C" const char* dpm_get_module_path(void) { \
-/* Get from environment variable or use default */ \
-const char* env_path = getenv("DPM_MODULE_PATH"); \
-return env_path ? env_path : "/usr/lib/dpm/modules/"; \
-} \
-int main(int argc, char** argv) { \
-/* Default to "help" if no command is provided */ \
-const char* command = "help"; \
-\
-/* If arguments are provided, use the first as command */ \
-if (argc > 1) { \
-command = argv[1]; \
-/* Shift arguments for the command handler but keep the original argc count */ \
-argv++; \
-argc--; \
-} \
-\
-return dpm_module_execute(command, argc, argv); \
-}
-
+#include "StandaloneModuleImpl.hpp"
 #endif // BUILD_STANDALONE

dpmdk/include/StandaloneModuleImpl.hpp

@@ -0,0 +1,121 @@
+/**
+ * @file StandaloneModuleImpl.hpp
+ * @brief Standalone implementations for DPM modules
+ *
+ * Provides implementations of core DPM functions for standalone module builds,
+ * allowing modules to be compiled and run independently of the main DPM system
+ * for testing and development purposes.
+ *
+ * @copyright Copyright (c) 2025 SILO GROUP LLC
+ * @author Chris Punches <chris.punches@silogroup.org>
+ *
+ * Part of the Dark Horse Linux Package Manager (DPM)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <https://www.gnu.org/licenses/>.
+ *
+ * For bug reports or contributions, please contact the dhlp-contributors
+ * mailing list at: https://lists.darkhorselinux.org/mailman/listinfo/dhlp-contributors
+ */
+
+#pragma once
+
+#include <iostream>
+#include <string>
+#include <cstdlib>
+
+// All implementations must be inline to prevent multiple definition errors when included in multiple files
+/**
+ * @brief Standalone implementation of dpm_log
+ */
+inline void dpm_log(int level, const char* message) {
+    const char* level_str;
+    switch (level) {
+        case 0: level_str = "FATAL"; break;
+        case 1: level_str = "ERROR"; break;
+        case 2: level_str = "WARN"; break;
+        case 3: level_str = "INFO"; break;
+        case 4: level_str = "DEBUG"; break;
+        default: level_str = "UNKNOWN"; break;
+    }
+    std::cout << "[" << level_str << "] " << message << std::endl;
+}
+
+/**
+ * @brief Standalone implementation of dpm_con
+ */
+inline void dpm_con(int level, const char* message) {
+    const char* level_str;
+    switch (level) {
+        case 0: level_str = "FATAL"; break;
+        case 1: level_str = "ERROR"; break;
+        case 2: level_str = "WARN"; break;
+        case 3: level_str = "INFO"; break;
+        case 4: level_str = "DEBUG"; break;
+        default: level_str = "UNKNOWN"; break;
+    }
+    std::cout << "[" << level_str << "] " << message << std::endl;
+}
+
+/**
+ * @brief Standalone implementation of dpm_get_config
+ */
+inline const char* dpm_get_config(const char* section, const char* key) {
+    if (!section || !key) return nullptr;
+
+    // Create environment variable name in format SECTION_KEY
+    std::string env_name = std::string(section) + "_" + std::string(key);
+
+    // Check if environment variable exists
+    const char* env_value = getenv(env_name.c_str());
+    return env_value; // Will be null if env var doesn't exist
+}
+
+/**
+ * @brief Standalone implementation of dpm_set_logging_level
+ */
+inline void dpm_set_logging_level(int level) {
+    std::cout << "[INFO] Verbosity level ignored, as all standalone executions have maximum verbosity" << std::endl;
+}
+
+/**
+ * @brief Standalone implementation of dpm_get_module_path
+ */
+inline const char* dpm_get_module_path(void) {
+    // Get from environment variable or use default
+    const char* env_path = getenv("DPM_MODULE_PATH");
+    return env_path ? env_path : "/usr/lib/dpm/modules/";
+}
+
+/**
+ * @brief Standalone module main function
+ *
+ * Provides a main() function for standalone module builds that
+ * initializes the environment and routes to the module's execute function.
+ */
+#define DPM_MODULE_STANDALONE_MAIN() \
+int main(int argc, char** argv) { \
+    /* Default to "help" if no command is provided */ \
+    const char* command = "help"; \
+    \
+    /* If arguments are provided, use the first as command */ \
+    if (argc > 1) { \
+        command = argv[1]; \
+        /* Shift arguments for the command handler but keep the original argc count */ \
+        argv++; \
+        argc--; \
+    } \
+    \
+    return dpm_module_execute(command, argc, argv); \
+}
+/* End of file */

include/ConfigManager.hpp

@@ -157,10 +157,10 @@ class ConfigManager {
         bool hasConfigKey(const char* section, const char* key) const;
 
         // getter for _module_path
-        void setModulePath(const std::string& module_path);
+        void setModulePath(const char * module_path);
 
         // setter for _module_path
-        std::string getModulePath() const;
+        const char * getModulePath() const;
 
     private:
         /**

modules/verify/include/verify_commands.hpp

@@ -27,7 +27,8 @@ enum Command {
     CMD_UNKNOWN,     /**< Unknown or unsupported command */
     CMD_HELP,        /**< Display help information */
     CMD_CHECKSUM,    /**< Verify package checksums */
-    CMD_SIGNATURE    /**< Verify package signatures */
+    CMD_SIGNATURE,   /**< Verify package signatures */
+    CMD_CHECK        /**< Check build module integration */
 };
 
 /**
@@ -85,3 +86,15 @@ int cmd_unknown(const char* command, int argc, char** argv);
  * @return The corresponding Command enum value
  */
 Command parse_command(const char* cmd_str);
+
+/**
+ * @brief Handler for the check command
+ *
+ * Checks if the build module can be loaded. This validates that the integration
+ * between the verify module and build module is working correctly.
+ *
+ * @param argc Number of arguments
+ * @param argv Array of arguments
+ * @return 0 on success, non-zero on failure
+ */
+int cmd_check(int argc, char** argv);

modules/verify/src/verify_commands.cpp

@@ -196,6 +196,7 @@ int cmd_help(int argc, char** argv) {
     dpm_con(LOG_INFO, "");
     dpm_con(LOG_INFO, "  checksum   - Verify checksums of installed packages");
     dpm_con(LOG_INFO, "  signature  - Verify signatures of installed packages");
+    dpm_con(LOG_INFO, "  check      - Check build module integration");
     dpm_con(LOG_INFO, "  help       - Display this help message");
     dpm_con(LOG_INFO, "");
     dpm_con(LOG_INFO, "Usage: dpm verify <command>");
@@ -227,6 +228,30 @@ Command parse_command(const char* cmd_str) {
     else if (strcmp(cmd_str, "signature") == 0) {
         return CMD_SIGNATURE;
     }
+    else if (strcmp(cmd_str, "check") == 0) {
+        return CMD_CHECK;
+    }
 
     return CMD_UNKNOWN;
 }
+
+int cmd_check(int argc, char** argv) {
+    dpm_log(LOG_INFO, "Checking build module integration...");
+
+    void* module_handle = nullptr;
+    int result = check_and_load_build_module(module_handle);
+
+    if (result != 0) {
+        dpm_log(LOG_ERROR, "Failed to load build module.");
+        return 1;
+    }
+
+    dpm_log(LOG_INFO, "Successfully loaded build module.");
+
+    // Clean up
+    if (module_handle) {
+        dlclose(module_handle);
+    }
+
+    return 0;
+}

modules/verify/verify.cpp

@@ -85,6 +85,9 @@ extern "C" int dpm_module_execute(const char* command, int argc, char** argv) {
         case CMD_SIGNATURE:
             return cmd_signature(argc, argv);
 
+        case CMD_CHECK:
+            return cmd_check(argc, argv);
+
         case CMD_HELP:
             return cmd_help(argc, argv);
 

src/ConfigManager.cpp

@@ -321,10 +321,10 @@ bool ConfigManager::getConfigBool(const char* section, const char* key, bool def
     return defaultValue;
 }
 
-void ConfigManager::setModulePath(const std::string& module_path) {
+void ConfigManager::setModulePath(const char * module_path) {
     _module_path = module_path;
 }
 
-std::string ConfigManager::getModulePath() const {
-    return _module_path;
+const char * ConfigManager::getModulePath() const {
+    return _module_path.c_str();
 }

src/dpm.cpp

@@ -129,8 +129,6 @@ int main( int argc, char* argv[] )
             }
         }
 
-        g_config_manager.setModulePath(module_path);
-
         // create a module loader object with the determined path
         ModuleLoader loader(module_path);
 
@@ -165,6 +163,8 @@ int main( int argc, char* argv[] )
         }
     }
 
+    g_config_manager.setModulePath(module_path.c_str());
+
     // create a module loader object with the determined path
     ModuleLoader loader(module_path);
 

src/module_interface.cpp

@@ -123,7 +123,7 @@ extern "C" void dpm_set_logging_level(int level) {
 }
 
 extern "C" const char* dpm_get_module_path(void) {
-    static std::string module_path;
+    static const char * module_path;
     module_path = g_config_manager.getModulePath();
-    return module_path.c_str();
+    return module_path;
 }