Initial setup for vpd-tool APIs (ibm-openbmc#501)

This commit includes changes and new source code files required for
implementation of vpd-tool APIs.

Change-Id: I821777237a3080d390e2bba151cd685ef8994bf9
Signed-off-by: Souvik Roy <[email protected]>

vpd-tool/include/tool_constants.hpp

@@ -14,5 +14,9 @@ constexpr auto inventoryManagerService =
     "xyz.openbmc_project.Inventory.Manager";
 constexpr auto baseInventoryPath = "/xyz/openbmc_project/inventory";
 constexpr auto ipzVpdInfPrefix = "com.ibm.ipzvpd.";
+constexpr auto inventoryItemInf = "xyz.openbmc_project.Inventory.Item";
+constexpr auto kwdVpdInf = "com.ibm.ipzvpd.VINI";
+constexpr auto locationCodeInf = "com.ibm.ipzvpd.Location";
+constexpr auto assetInf = "xyz.openbmc_project.Inventory.Decorator.Asset";
 } // namespace constants
 } // namespace vpd

vpd-tool/include/tool_json_utility.hpp

@@ -0,0 +1,53 @@
+#pragma once
+
+#include <nlohmann/json.hpp>
+
+#include <fstream>
+
+namespace vpd
+{
+namespace jsonUtility
+{
+
+/**
+ * @brief API to parse respective JSON.
+ *
+ * Exception is thrown in case of JSON parse error.
+ *
+ * @param[in] i_pathToJson - Path to JSON.
+ * @return Parsed JSON.
+ * @throw std::runtime_error
+ */
+inline nlohmann::json getParsedJson(const std::string& i_pathToJson)
+{
+    if (i_pathToJson.empty())
+    {
+        throw std::runtime_error("Path to JSON is missing");
+    }
+
+    if (!std::filesystem::exists(i_pathToJson) ||
+        std::filesystem::is_empty(i_pathToJson))
+    {
+        throw std::runtime_error("Incorrect File Path or empty file = " +
+                                 i_pathToJson);
+    }
+
+    std::ifstream jsonFile(i_pathToJson);
+    if (!jsonFile)
+    {
+        throw std::runtime_error("Failed to access Json path = " +
+                                 i_pathToJson);
+    }
+
+    try
+    {
+        return nlohmann::json::parse(jsonFile);
+    }
+    catch (const nlohmann::json::parse_error& e)
+    {
+        throw std::runtime_error("Failed to parse JSON file");
+    }
+}
+
+} // namespace jsonUtility
+} // namespace vpd

vpd-tool/include/tool_utils.hpp

@@ -1,5 +1,6 @@
 #pragma once
 
+#include "tool_constants.hpp"
 #include "tool_types.hpp"
 
 #include <nlohmann/json.hpp>

vpd-tool/meson.build

@@ -8,6 +8,11 @@ endif
 sdbusplus = dependency('sdbusplus', fallback: [ 'sdbusplus', 'sdbusplus_dep' ])
 dependency_list = [CLI11_dep, sdbusplus]
 
+conf_data = configuration_data()
+conf_data.set_quoted('INVENTORY_JSON_SYM_LINK', get_option('INVENTORY_JSON_SYM_LINK'))
+configure_file(output: 'config.h',
+            configuration : conf_data)
+
 sources = ['src/vpd_tool_main.cpp',
             'src/vpd_tool.cpp']
 

vpd-tool/meson.options

@@ -0,0 +1 @@
+option('INVENTORY_JSON_SYM_LINK', type: 'string', value: '/var/lib/vpd/vpd_inventory.json',  description: 'Symbolic link to vpd inventory json.')