public CommandProcessorBase CreateCommandProcessor(Command command)
{
string cmdText = command.CommandText;
CommandInfo commandInfo = null;
bool useLocalScope = command.UseLocalScope;
if (command.IsScript) //CommandText contains a script block. Parse it
{
command.ScriptBlockAst = CommandManager.ParseInput(cmdText);
}
//either we parsed something like "& { foo; bar }", or the CommandText was a script and was just parsed
if (command.ScriptBlockAst != null)
{
commandInfo = new ScriptInfo("", command.ScriptBlockAst.GetScriptBlock(),
useLocalScope ? ScopeUsages.NewScope : ScopeUsages.CurrentScope);
}
else //otherwise it's a real command (cmdlet, script, function, application)
{
commandInfo = FindCommand(cmdText, useLocalScope);
}
// make sure we only create a valid command processor if it's a valid command
commandInfo.Validate();
switch (commandInfo.CommandType)
{
case CommandTypes.Application:
return(new ApplicationProcessor((ApplicationInfo)commandInfo));
case CommandTypes.Cmdlet:
return(new CommandProcessor(commandInfo as CmdletInfo));
case CommandTypes.Script:
case CommandTypes.ExternalScript:
case CommandTypes.Function:
return(new ScriptBlockProcessor(commandInfo as IScriptBlockInfo, commandInfo));
default:
throw new NotImplementedException("Invalid command type");
}
}
private void AddInitialSessionCommands()
{
foreach (SessionStateCommandEntry cmdEntry in _initialSessionState.Commands)
{
if (cmdEntry is SessionStateAliasEntry)
{
var aliasEntry = (SessionStateAliasEntry)cmdEntry;
var aliasInfo = new AliasInfo(aliasEntry.Name, aliasEntry.Definition, aliasEntry.Description,
CommandManager, aliasEntry.Options);
ExecutionContext.SessionState.Alias.Set(aliasInfo, "global");
}
else if (cmdEntry is SessionStateFunctionEntry)
{
var funEntry = (SessionStateFunctionEntry)cmdEntry;
var scriptBlock = new ScriptBlock(CommandManager.ParseInput(funEntry.Definition));
var funInfo = new FunctionInfo(funEntry.Name, scriptBlock, funEntry.Options);
ExecutionContext.SessionState.Function.Set(funInfo);
}
}
}