我目前遇到了一个标准的Bobby Tables问题，但环境是Chef + Ruby + powershell。
到目前为止，所有solutions I've seen似乎都不合适：它们用引号包围参数，但不完全转义参数。 Shellwords和shellescape看起来很有希望，但它们似乎是特定于bash的。
例如，我可能想在Chef中构建这个windows shell命令：
.\foo.exe BAR="#{node['baz']}"
从SQL开发世界中推广我会天真地期待一个类似这样的接口：
cmd = "foo.exe BAR=?"
args = (node['baz'])
run-command(cmd, args)
run-command将处理转义任何参数的位置。相反，我看到接口让我想起了开发人员必须将SQL构造为字符串并且“手动”转义任何参数时糟糕的旧SQL时间。
有关如何进行的最佳做法的指示？使用system？谢谢！
编辑：要明确，上面的参数baz可以包含任意文本，包括可能的任何字符组合。可以认为它与Bobby Tables问题相同。
答案 0 :(得分：1)
The easiest generic solution is to use the array form for the int main()
{
Account Savings;
Account Checkings;
Account *ptr;
Account savings; // Savings account object
char choice; // Menu selection
// Set numeric output formatting.
cout << fixed << showpoint << setprecision(2);
do
{
// Display the menu and get a valid selection.
displayMenu();
cin >> choice;
while (toupper(choice) < 'A' || toupper(choice) > 'G')
{
cout << "Please make a choice in the range " << "of A through G:";
cin >> choice;
}
// Process the user's menu selection.
switch(choice)
{
case 'a':
case 'A': cout << "The current balance is $";
cout << savings.getBalance() << endl;
break;
case 'b':
case 'B': cout << "There have been ";
cout << savings.getTransactions() << " transactions.\n";
break;
case 'c':
case 'C': cout << "Interest earned for this period: $";
cout << savings.getInterest() << endl;
break;
case 'd':
case 'D': makeDeposit(savings);
break;
case 'e':
case 'E': withdraw(savings);
break;
case 'f':
case 'F': savings.calcInterest();
cout << "Interest added.\n";
}
} while (toupper(choice) != 'G');
return 0;
}
void displayMenu()
{
cout << "\n Welcome to The Bank \n";
cout << "-----------------------------------------\n";
cout << "A) Display the account balance\n";
cout << "B) Display the number of transactions\n";
cout << "C) Display interest earned for this period\n";
cout << "D) Make a deposit\n";
cout << "E) Make a withdrawal\n";
cout << "F) Add interest for this period\n";
cout << "G) Exit the program\n\n";
cout << "Enter your choice: ";
}
void makeDeposit(Account *acct)
{
double dollars;
cout << "Enter the amount of the deposit: ";
cin >> dollars;
cin.ignore();
acct.makeDeposit(dollars);
}
void withdraw(Account *acct)
{
double dollars;
cout << "Enter the amount of the withdrawal: ";
cin >> dollars;
cin.ignore();
if (!acct.withdraw(dollars))
cout << "ERROR: Withdrawal amount too large.\n\n";
}
resource's execute property. This avoids all shell parsing an runs the command verbatim.
commandThis doesn't work for execute 'whatever' do
command ['foo.exe', "BAR=#{node['baz']}"]
end
style resources though, which take a string for the script chunk to run, including script. There you would need something more tailored to PowerShell and I don't know its rules well enough to say if Shellwords would match.