1 /*
2 * Copyright (c) 2022-2023 Huawei Device Co., Ltd.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at
6 *
7 * http://www.apache.org/licenses/LICENSE-2.0
8 *
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
14 */
15
16 #include <iostream>
17 #include <sstream>
18
19 #include "tools_op.h"
20
21 namespace OHOS::FileManagement::Backup {
22 using namespace std;
23
GenHelpMsg()24 static string GenHelpMsg()
25 {
26 return "\t\tThis operation helps to dump the help messages.";
27 }
28
Exec(map<string,vector<string>> & mapArgToVal)29 static int Exec(map<string, vector<string>> &mapArgToVal)
30 {
31 stringstream ss;
32 auto &&allOps = ToolsOp::GetAllOperations();
33 ss << "Usage: backup_tool <SubCommand> [OPTION]... [ARG]..." << endl;
34 for (size_t i = 0; i < allOps.size(); ++i) {
35 auto desc = allOps[i].GetDescriptor();
36
37 // echo: <op seqs>\n
38 ss << allOps[i].GetName();
39
40 // echo: help msgs\n\n
41 if (desc.funcGenHelpMsg) {
42 ss << desc.funcGenHelpMsg() << endl;
43 }
44 if (i != allOps.size() - 1) {
45 ss << endl;
46 }
47 }
48 printf("%s", ss.str().c_str());
49 return 0;
50 }
51
52 /**
53 * @brief The hack behind is that "variable with static storage duration has initialization or a destructor with side
54 * effects; it shall not be eliminated even if it appears to be unused" -- point 2.[basic.stc.static].c++ draft
55 *
56 */
57 static bool g_autoRegHack = ToolsOp::Register(ToolsOp {ToolsOp::Descriptor {
58 .opName = {"help"},
59 .funcGenHelpMsg = GenHelpMsg,
60 .funcExec = Exec,
61 }});
62 } // namespace OHOS::FileManagement::Backup