private bool AstAssignsToSameVariable(Ast ast)
{
ParameterAst ast2 = ast as ParameterAst;
if (ast2 != null)
{
return(this.VariablePath.IsUnscopedVariable && ast2.Name.VariablePath.UnqualifiedPath.Equals(this.VariablePath.UnqualifiedPath, StringComparison.OrdinalIgnoreCase));
}
ForEachStatementAst ast3 = ast as ForEachStatementAst;
if (ast3 != null)
{
return(this.VariablePath.IsUnscopedVariable && ast3.Variable.VariablePath.UnqualifiedPath.Equals(this.VariablePath.UnqualifiedPath, StringComparison.OrdinalIgnoreCase));
}
AssignmentStatementAst ast4 = (AssignmentStatementAst)ast;
ExpressionAst left = ast4.Left;
ConvertExpressionAst ast6 = left as ConvertExpressionAst;
if (ast6 != null)
{
left = ast6.Child;
}
VariableExpressionAst ast7 = left as VariableExpressionAst;
if (ast7 == null)
{
return(false);
}
System.Management.Automation.VariablePath variablePath = ast7.VariablePath;
return(variablePath.UserPath.Equals(this.VariablePath.UserPath, StringComparison.OrdinalIgnoreCase) || (this.VariablePath.IsScript && this.VariablePath.UnqualifiedPath.Equals(variablePath.UnqualifiedPath, StringComparison.OrdinalIgnoreCase)));
}
/// <summary>
/// Derived classes override this method to return their
/// particular type of scoped item.
/// </summary>
/// <param name="scope">
/// The scope to look the item up in.
/// </param>
/// <param name="name">
/// The name of the item to retrieve.
/// </param>
/// <param name="alias">
/// The scope item that the derived class should return.
/// </param>
/// <returns>
/// True if the scope item was found or false otherwise.
/// </returns>
protected override bool GetScopeItem(
SessionStateScope scope,
VariablePath name,
out AliasInfo alias)
{
Diagnostics.Assert(!(name is FunctionLookupPath),
"name was scanned incorrect if we get here and it is a FunctionLookupPath");
bool result = true;
alias = scope.GetAlias(name.QualifiedName);
// If the alias is private and the lookup scope
// isn't the current scope, claim that the alias
// doesn't exist so that the lookup continues.
if (alias == null ||
((alias.Options & ScopedItemOptions.Private) != 0 &&
scope != sessionState.CurrentScope))
{
result = false;
}
return(result);
}
protected override bool GetScopeItem(SessionStateScope scope, VariablePath name, out PSVariable variable)
{
bool flag = true;
variable = scope.GetVariable(name.QualifiedName, this._origin);
return(((variable != null) && (!variable.IsPrivate || (scope == base.sessionState.CurrentScope))) && flag);
}
internal object GetVariableValue(VariablePath path, object defaultValue)
{
CmdletProviderContext context;
SessionStateScope scope;
return(this._engineSessionState.GetVariableValue(path, out context, out scope) ?? defaultValue);
}
internal static PSReference GetVariableAsRef(VariablePath variablePath, ExecutionContext executionContext, Type staticType)
{
Diagnostics.Assert(variablePath.IsVariable, "calller to verify varpath is a variable.");
SessionStateInternal sessionState = executionContext.EngineSessionState;
CommandOrigin origin = sessionState.CurrentScope.ScopeOrigin;
SessionStateScope scope;
PSVariable var = sessionState.GetVariableItem(variablePath, out scope, origin);
if (var == null)
{
throw InterpreterError.NewInterpreterException(variablePath, typeof(RuntimeException), null,
"NonExistingVariableReference",
ParserStrings.NonExistingVariableReference);
}
object value = var.Value;
if (staticType == null && value != null)
{
value = PSObject.Base(value);
if (value != null)
{
staticType = value.GetType();
}
}
if (staticType == null)
{
var declaredType = var.Attributes.OfType <ArgumentTypeConverterAttribute>().FirstOrDefault();
staticType = declaredType != null ? declaredType.TargetType : typeof(LanguagePrimitives.Null);
}
return(PSReference.CreateInstance(var, staticType));
}
protected override bool GetScopeItem(SessionStateScope scope, VariablePath name, out AliasInfo alias)
{
bool flag = true;
alias = scope.GetAlias(name.QualifiedName);
return(((alias != null) && (((alias.Options & ScopedItemOptions.Private) == ScopedItemOptions.None) || (scope == base.sessionState.CurrentScope))) && flag);
}
private static PSReference GetVariableAsRef(VariablePath variablePath, ExecutionContext executionContext, Type staticType)
{
SessionStateScope scope;
SessionStateInternal engineSessionState = executionContext.EngineSessionState;
CommandOrigin scopeOrigin = engineSessionState.CurrentScope.ScopeOrigin;
PSVariable variable = engineSessionState.GetVariableItem(variablePath, out scope, scopeOrigin);
if (variable == null)
{
throw InterpreterError.NewInterpreterException(variablePath, typeof(RuntimeException), null, "NonExistingVariableReference", ParserStrings.NonExistingVariableReference, new object[0]);
}
object obj2 = variable.Value;
if ((staticType == null) && (obj2 != null))
{
obj2 = PSObject.Base(obj2);
if (obj2 != null)
{
staticType = obj2.GetType();
}
}
if (staticType == null)
{
ArgumentTypeConverterAttribute attribute = variable.Attributes.OfType<ArgumentTypeConverterAttribute>().FirstOrDefault<ArgumentTypeConverterAttribute>();
staticType = (attribute != null) ? attribute.TargetType : typeof(LanguagePrimitives.Null);
}
return PSReference.CreateInstance(variable, staticType);
}
private static PSReference GetVariableAsRef(VariablePath variablePath, ExecutionContext executionContext, Type staticType)
{
SessionStateScope scope;
SessionStateInternal engineSessionState = executionContext.EngineSessionState;
CommandOrigin scopeOrigin = engineSessionState.CurrentScope.ScopeOrigin;
PSVariable variable = engineSessionState.GetVariableItem(variablePath, out scope, scopeOrigin);
if (variable == null)
{
throw InterpreterError.NewInterpreterException(variablePath, typeof(RuntimeException), null, "NonExistingVariableReference", ParserStrings.NonExistingVariableReference, new object[0]);
}
object obj2 = variable.Value;
if ((staticType == null) && (obj2 != null))
{
obj2 = PSObject.Base(obj2);
if (obj2 != null)
{
staticType = obj2.GetType();
}
}
if (staticType == null)
{
ArgumentTypeConverterAttribute attribute = variable.Attributes.OfType <ArgumentTypeConverterAttribute>().FirstOrDefault <ArgumentTypeConverterAttribute>();
staticType = (attribute != null) ? attribute.TargetType : typeof(LanguagePrimitives.Null);
}
return(PSReference.CreateInstance(variable, staticType));
}
internal static object GetVariableValue(VariablePath variablePath, ExecutionContext executionContext, VariableExpressionAst varAst)
{
if (!variablePath.IsVariable)
{
CmdletProviderContext contextOut;
SessionStateScope scopeOut;
SessionStateInternal ss = executionContext.EngineSessionState;
return(ss.GetVariableValueFromProvider(variablePath, out contextOut, out scopeOut, ss.CurrentScope.ScopeOrigin));
}
SessionStateInternal sessionState = executionContext.EngineSessionState;
CommandOrigin origin = sessionState.CurrentScope.ScopeOrigin;
SessionStateScope scope;
PSVariable var = sessionState.GetVariableItem(variablePath, out scope, origin);
if (var != null)
{
return(var.Value);
}
if (sessionState.ExecutionContext._debuggingMode > 0)
{
sessionState.ExecutionContext.Debugger.CheckVariableRead(variablePath.UnqualifiedPath);
}
if (ThrowStrictModeUndefinedVariable(executionContext, varAst))
{
throw InterpreterError.NewInterpreterException(variablePath.UserPath, typeof(RuntimeException),
varAst.Extent, "VariableIsUndefined", ParserStrings.VariableIsUndefined, variablePath.UserPath);
}
return(null);
}
protected override bool GetScopeItem(SessionStateScope scope, VariablePath path, out FunctionInfo script)
{
bool flag = true;
this.name = path.IsFunction ? path.UnqualifiedPath : path.QualifiedName;
script = scope.GetFunction(this.name);
if (script != null)
{
bool flag2;
FilterInfo info = script as FilterInfo;
if (info != null)
{
flag2 = (info.Options & ScopedItemOptions.Private) != ScopedItemOptions.None;
}
else
{
flag2 = (script.Options & ScopedItemOptions.Private) != ScopedItemOptions.None;
}
if (flag2 && (scope != base.sessionState.CurrentScope))
{
return(false);
}
SessionState.ThrowIfNotVisible(this._origin, script);
return(flag);
}
return(false);
}
public FunctionScopeItemSearcher(
SessionStateInternal sessionState,
VariablePath lookupPath,
CommandOrigin origin) : base(sessionState, lookupPath)
{
_origin = origin;
}
/// <summary>
/// Derived classes override this method to return their
/// particular type of scoped item.
/// </summary>
/// <param name="scope">
/// The scope to look the item up in.
/// </param>
/// <param name="name">
/// The name of the item to retrieve.
/// </param>
/// <param name="variable">
/// The scope item that the derived class should return.
/// </param>
/// <returns>
/// True if the scope item was found or false otherwise.
/// </returns>
protected override bool GetScopeItem(
SessionStateScope scope,
VariablePath name,
out PSVariable variable)
{
Diagnostics.Assert(!(name is FunctionLookupPath),
"name was scanned incorrect if we get here and it is a FunctionLookupPath");
bool result = true;
variable = scope.GetVariable(name.QualifiedName, _origin);
// If the variable is private and the lookup scope
// isn't the current scope, claim that the variable
// doesn't exist so that the lookup continues.
if (variable == null ||
(variable.IsPrivate &&
scope != sessionState.CurrentScope))
{
result = false;
}
return(result);
}
public VariableExpressionAst(IScriptExtent extent, System.Management.Automation.VariablePath variablePath, bool splatted) : base(extent)
{
this._tupleIndex = -1;
if (variablePath == null)
{
throw PSTraceSource.NewArgumentNullException("variablePath");
}
this.VariablePath = variablePath;
this.Splatted = splatted;
}
private SessionStateProviderBase GetSessionStateProvider(VariablePath variablePath)
{
PSDriveInfo driveInfo;
if (!ExecutionContext.SessionState.Drive.TryGet(variablePath.DriveName, out driveInfo))
{
return null;
}
return ExecutionContext.SessionState.Provider.GetInstance(driveInfo.Provider.Name)
as SessionStateProviderBase;
}
protected override bool GetScopeItem(SessionStateScope scope, VariablePath name, out PSDriveInfo drive)
{
bool flag = true;
drive = scope.GetDrive(name.DriveName);
if (drive == null)
{
flag = false;
}
return(flag);
}
internal VariablePath CloneAndSetLocal()
{
Debug.Assert(IsUnscopedVariable, "Special method to clone, input must be unqualified");
VariablePath result = new VariablePath();
result._userPath = _userPath;
result._unqualifiedPath = _unqualifiedPath;
result._flags = VariablePathFlags.Local | VariablePathFlags.Variable;
return(result);
}
private static object SetVariableValue(VariablePath variablePath, object value, ExecutionContext executionContext, AttributeBaseAst[] attributeAsts)
{
SessionStateScope scope;
SessionStateInternal engineSessionState = executionContext.EngineSessionState;
CommandOrigin scopeOrigin = engineSessionState.CurrentScope.ScopeOrigin;
if (!variablePath.IsVariable)
{
engineSessionState.SetVariable(variablePath, value, true, scopeOrigin);
return(value);
}
if (executionContext.PSDebugTraceLevel > 0)
{
executionContext.Debugger.TraceVariableSet(variablePath.UnqualifiedPath, value);
}
if (variablePath.IsUnscopedVariable)
{
variablePath = variablePath.CloneAndSetLocal();
}
PSVariable newValue = engineSessionState.GetVariableItem(variablePath, out scope, scopeOrigin);
if (newValue == null)
{
Collection <Attribute> attributes = (attributeAsts == null) ? new Collection <Attribute>() : GetAttributeCollection(attributeAsts);
newValue = new PSVariable(variablePath.UnqualifiedPath, value, ScopedItemOptions.None, attributes);
engineSessionState.SetVariable(variablePath, newValue, false, scopeOrigin);
if (executionContext._debuggingMode > 0)
{
executionContext.Debugger.CheckVariableWrite(variablePath.UnqualifiedPath);
}
return(value);
}
if (attributeAsts != null)
{
newValue.Attributes.Clear();
Collection <Attribute> attributeCollection = GetAttributeCollection(attributeAsts);
value = PSVariable.TransformValue(attributeCollection, value);
if (!PSVariable.IsValidValue(attributeCollection, value))
{
ValidationMetadataException exception = new ValidationMetadataException("ValidateSetFailure", null, Metadata.InvalidValueFailure, new object[] { newValue.Name, (value != null) ? value.ToString() : "" });
throw exception;
}
newValue.SetValueRaw(value, true);
newValue.AddParameterAttributesNoChecks(attributeCollection);
if (executionContext._debuggingMode > 0)
{
executionContext.Debugger.CheckVariableWrite(variablePath.UnqualifiedPath);
}
return(value);
}
newValue.Value = value;
return(value);
}
internal ScopedItemSearcher(SessionStateInternal sessionState, VariablePath lookupPath)
{
if (sessionState == null)
{
throw PSTraceSource.NewArgumentNullException("sessionState");
}
if (lookupPath == null)
{
throw PSTraceSource.NewArgumentNullException("lookupPath");
}
this.sessionState = sessionState;
this.lookupPath = lookupPath;
this.InitializeScopeEnumerator();
}
/// <summary>
/// Get a variable out of session state. This interface supports
/// the scope specifiers like "global:foobar"
/// </summary>
///
/// <param name="name">
/// name of variable to look up
/// </param>
///
/// <param name="origin">
/// Origin of the command making this request.
/// </param>
///
/// <returns>
/// The specified variable.
/// </returns>
///
/// <exception cref="ArgumentNullException">
/// If <paramref name="name"/> is null.
/// </exception>
///
internal PSVariable GetVariable(string name, CommandOrigin origin)
{
if (name == null)
{
throw PSTraceSource.NewArgumentNullException("name");
}
VariablePath variablePath = new VariablePath(name, VariablePathFlags.Variable | VariablePathFlags.Unqualified);
SessionStateScope scope = null;
PSVariable resultItem = GetVariableItem(variablePath, out scope, origin);
return resultItem;
} // GetVariable
/// <summary>
/// Derived classes override this method to return their
/// particular type of scoped item.
/// </summary>
/// <param name="scope">
/// The scope to look the item up in.
/// </param>
/// <param name="path">
/// The name of the item to retrieve.
/// </param>
/// <param name="script">
/// The scope item that the derived class should return.
/// </param>
/// <returns>
/// True if the scope item was found or false otherwise.
/// </returns>
protected override bool GetScopeItem(
SessionStateScope scope,
VariablePath path,
out FunctionInfo script)
{
Diagnostics.Assert(path is FunctionLookupPath,
"name was scanned incorrect if we get here and it is not a FunctionLookupPath");
bool result = true;
_name = path.IsFunction ? path.UnqualifiedPath : path.QualifiedName;
script = scope.GetFunction(_name);
if (script != null)
{
bool isPrivate;
FilterInfo filterInfo = script as FilterInfo;
if (filterInfo != null)
{
isPrivate = (filterInfo.Options & ScopedItemOptions.Private) != 0;
}
else
{
isPrivate = (script.Options & ScopedItemOptions.Private) != 0;
}
// If the function is private and the lookup scope
// isn't the current scope, claim that the function
// doesn't exist so that the lookup continues.
if (isPrivate &&
scope != sessionState.CurrentScope)
{
result = false;
}
else
{
// Now check the visibility of the variable...
SessionState.ThrowIfNotVisible(_origin, script);
}
}
else
{
result = false;
}
return(result);
}
internal T GetEnumPreference <T>(VariablePath preferenceVariablePath, T defaultPref, out bool defaultUsed)
{
CmdletProviderContext context = null;
SessionStateScope scope = null;
object obj2 = this.EngineSessionState.GetVariableValue(preferenceVariablePath, out context, out scope);
if (obj2 is T)
{
if (obj2 is ActionPreference)
{
ActionPreference o = (ActionPreference)obj2;
if (o == ActionPreference.Ignore)
{
this.EngineSessionState.SetVariableValue(preferenceVariablePath.UserPath, defaultPref);
throw new NotSupportedException(StringUtil.Format(ErrorPackage.UnsupportedPreferenceError, o));
}
}
T local = (T)obj2;
defaultUsed = false;
return(local);
}
defaultUsed = true;
T local2 = defaultPref;
if (obj2 != null)
{
try
{
string str2 = obj2 as string;
if (str2 != null)
{
local2 = (T)Enum.Parse(typeof(T), str2, true);
defaultUsed = false;
return(local2);
}
local2 = (T)obj2;
defaultUsed = false;
}
catch (InvalidCastException)
{
}
catch (ArgumentException)
{
}
}
return(local2);
}
/// <summary>
/// Constructs a scoped item searcher.
/// </summary>
/// <param name="sessionState">
/// The state of the engine instance to enumerate through the scopes.
/// </param>
/// <param name="lookupPath">
/// The parsed name of the item to lookup.
/// </param>
/// <exception cref="ArgumentNullException">
/// If <paramref name="sessionState"/> or <paramref name="lookupPath"/>
/// is null.
/// </exception>
internal ScopedItemSearcher(
SessionStateInternal sessionState,
VariablePath lookupPath)
{
if (sessionState is null)
{
throw PSTraceSource.NewArgumentNullException(nameof(sessionState));
}
if (lookupPath is null)
{
throw PSTraceSource.NewArgumentNullException(nameof(lookupPath));
}
this.sessionState = sessionState;
_lookupPath = lookupPath;
InitializeScopeEnumerator();
}
internal override void BindParameter(string name, object value)
{
if ((value == AutomationNull.Value) || (value == UnboundParameter.Value))
{
value = null;
}
VariablePath variablePath = new VariablePath(name, VariablePathFlags.Variable);
if (((this.LocalScope == null) || !variablePath.IsAnyLocal()) || !this.LocalScope.TrySetLocalParameterValue(variablePath.UnqualifiedPath, this.CopyMutableValues(value)))
{
RuntimeDefinedParameter parameter;
PSVariable newValue = new PSVariable(variablePath.UnqualifiedPath, value, variablePath.IsPrivate ? ScopedItemOptions.Private : ScopedItemOptions.None);
base.Context.EngineSessionState.SetVariable(variablePath, newValue, false, CommandOrigin.Internal);
if (this.Script.RuntimeDefinedParameters.TryGetValue(name, out parameter))
{
newValue.AddParameterAttributesNoChecks(parameter.Attributes);
}
}
}
/// <summary>
/// Derived classes override this method to return their
/// particular type of scoped item.
/// </summary>
///
/// <param name="scope">
/// The scope to look the item up in.
/// </param>
///
/// <param name="name">
/// The name of the item to retrieve.
/// </param>
///
/// <param name="drive">
/// The scope item that the derived class should return.
/// </param>
///
/// <returns>
/// True if the scope item was found or false otherwise.
/// </returns>
///
protected override bool GetScopeItem(
SessionStateScope scope,
VariablePath name,
out PSDriveInfo drive)
{
Diagnostics.Assert(!(name is FunctionLookupPath),
"name was scanned incorrect if we get here and it is a FunctionLookupPath");
bool result = true;
drive = scope.GetDrive(name.DriveName);
if (drive == null)
{
result = false;
}
return(result);
}
internal override void BindParameter(string name, object value)
{
if ((value == AutomationNull.Value) || (value == UnboundParameter.Value))
{
value = null;
}
VariablePath variablePath = new VariablePath(name, VariablePathFlags.Variable);
if (((this.LocalScope == null) || !variablePath.IsAnyLocal()) || !this.LocalScope.TrySetLocalParameterValue(variablePath.UnqualifiedPath, this.CopyMutableValues(value)))
{
RuntimeDefinedParameter parameter;
PSVariable newValue = new PSVariable(variablePath.UnqualifiedPath, value, variablePath.IsPrivate ? ScopedItemOptions.Private : ScopedItemOptions.None);
base.Context.EngineSessionState.SetVariable(variablePath, newValue, false, CommandOrigin.Internal);
if (this.Script.RuntimeDefinedParameters.TryGetValue(name, out parameter))
{
newValue.AddParameterAttributesNoChecks(parameter.Attributes);
}
}
}
internal bool GetBooleanPreference(VariablePath preferenceVariablePath, bool defaultPref, out bool defaultUsed)
{
CmdletProviderContext context = null;
SessionStateScope scope = null;
object valueToConvert = this.EngineSessionState.GetVariableValue(preferenceVariablePath, out context, out scope);
if (valueToConvert == null)
{
defaultUsed = true;
return(defaultPref);
}
bool result = defaultPref;
defaultUsed = !LanguagePrimitives.TryConvertTo <bool>(valueToConvert, out result);
if (!defaultUsed)
{
return(result);
}
return(defaultPref);
}
/// <summary>
/// Binds the parameters to local variables in the function scope.
/// </summary>
/// <param name="name">
/// The name of the parameter to bind the value to.
/// </param>
/// <param name="value">
/// The value to bind to the parameter. It should be assumed by
/// derived classes that the proper type coercion has already taken
/// place and that any prerequisite metadata has been satisfied.
/// </param>
/// <param name="parameterMetadata"></param>
internal override void BindParameter(string name, object value, CompiledCommandParameter parameterMetadata)
{
if (value == AutomationNull.Value || value == UnboundParameter.Value)
{
value = null;
}
Diagnostics.Assert(name != null, "The caller should verify that name is not null");
var varPath = new VariablePath(name, VariablePathFlags.Variable);
// If the parameter was allocated in the LocalsTuple, we can avoid creating a PSVariable,
if (LocalScope != null &&
varPath.IsAnyLocal() &&
LocalScope.TrySetLocalParameterValue(varPath.UnqualifiedPath, CopyMutableValues(value)))
{
return;
}
// Otherwise we'll fall through and enter a new PSVariable in the current scope. This
// is what normally happens when dotting (though the above may succeed if a parameter name
// was an automatic variable like $PSBoundParameters.
// First we need to make a variable instance and apply
// any attributes from the script.
PSVariable variable = new PSVariable(varPath.UnqualifiedPath, value,
varPath.IsPrivate ? ScopedItemOptions.Private : ScopedItemOptions.None);
Context.EngineSessionState.SetVariable(varPath, variable, false, CommandOrigin.Internal);
RuntimeDefinedParameter runtimeDefinedParameter;
if (Script.RuntimeDefinedParameters.TryGetValue(name, out runtimeDefinedParameter))
{
// The attributes have already been checked and conversions run, so it is wrong
// to do so again.
variable.AddParameterAttributesNoChecks(runtimeDefinedParameter.Attributes);
}
}
public DriveScopeItemSearcher(
SessionStateInternal sessionState,
VariablePath lookupPath) : base(sessionState, lookupPath)
{
}
internal static PSModuleAutoLoadingPreference GetCommandDiscoveryPreference(ExecutionContext context, VariablePath variablePath, string environmentVariable)
{
if (context == null)
{
throw PSTraceSource.NewArgumentNullException("context");
}
object variableValue = context.GetVariableValue(variablePath);
if (variableValue != null)
{
return LanguagePrimitives.ConvertTo<PSModuleAutoLoadingPreference>(variableValue);
}
string str = Environment.GetEnvironmentVariable(environmentVariable);
if (!string.IsNullOrEmpty(str))
{
return LanguagePrimitives.ConvertTo<PSModuleAutoLoadingPreference>(str);
}
return PSModuleAutoLoadingPreference.All;
}
internal static bool IsImplicitVariableAccessibleInClassMethod(VariablePath variablePath)
{
return s_classMethodsAccessibleVariables.Contains(variablePath.UserPath);
}
internal static object SetVariableValue(VariablePath variablePath, object value, ExecutionContext executionContext, AttributeBaseAst[] attributeAsts)
{
SessionStateInternal sessionState = executionContext.EngineSessionState;
CommandOrigin origin = sessionState.CurrentScope.ScopeOrigin;
if (!variablePath.IsVariable)
{
sessionState.SetVariable(variablePath, value, true, origin);
return value;
}
// Variable assignment is traced only if trace level 2 is specified.
if (executionContext.PSDebugTraceLevel > 1)
{
executionContext.Debugger.TraceVariableSet(variablePath.UnqualifiedPath, value);
}
if (variablePath.IsUnscopedVariable)
{
variablePath = variablePath.CloneAndSetLocal();
}
SessionStateScope scope;
PSVariable var = sessionState.GetVariableItem(variablePath, out scope, origin);
if (var == null)
{
var attributes = attributeAsts == null
? new Collection<Attribute>()
: GetAttributeCollection(attributeAsts);
var = new PSVariable(variablePath.UnqualifiedPath, value, ScopedItemOptions.None, attributes);
sessionState.SetVariable(variablePath, var, false, origin);
if (executionContext._debuggingMode > 0)
{
executionContext.Debugger.CheckVariableWrite(variablePath.UnqualifiedPath);
}
}
else if (attributeAsts != null)
{
var.Attributes.Clear();
var attributes = GetAttributeCollection(attributeAsts);
value = PSVariable.TransformValue(attributes, value);
if (!PSVariable.IsValidValue(attributes, value))
{
ValidationMetadataException e = new ValidationMetadataException(
"ValidateSetFailure",
null,
Metadata.InvalidValueFailure,
var.Name,
((value != null) ? value.ToString() : "$null"));
throw e;
}
var.SetValueRaw(value, true);
var.AddParameterAttributesNoChecks(attributes);
if (executionContext._debuggingMode > 0)
{
executionContext.Debugger.CheckVariableWrite(variablePath.UnqualifiedPath);
}
}
else
{
// The setter will handle checking for variable writes.
var.Value = value;
}
return value;
}
private static object SetVariableValue(VariablePath variablePath, object value, ExecutionContext executionContext, AttributeBaseAst[] attributeAsts)
{
SessionStateScope scope;
SessionStateInternal engineSessionState = executionContext.EngineSessionState;
CommandOrigin scopeOrigin = engineSessionState.CurrentScope.ScopeOrigin;
if (!variablePath.IsVariable)
{
engineSessionState.SetVariable(variablePath, value, true, scopeOrigin);
return value;
}
if (executionContext.PSDebugTraceLevel > 0)
{
executionContext.Debugger.TraceVariableSet(variablePath.UnqualifiedPath, value);
}
if (variablePath.IsUnscopedVariable)
{
variablePath = variablePath.CloneAndSetLocal();
}
PSVariable newValue = engineSessionState.GetVariableItem(variablePath, out scope, scopeOrigin);
if (newValue == null)
{
Collection<Attribute> attributes = (attributeAsts == null) ? new Collection<Attribute>() : GetAttributeCollection(attributeAsts);
newValue = new PSVariable(variablePath.UnqualifiedPath, value, ScopedItemOptions.None, attributes);
engineSessionState.SetVariable(variablePath, newValue, false, scopeOrigin);
if (executionContext._debuggingMode > 0)
{
executionContext.Debugger.CheckVariableWrite(variablePath.UnqualifiedPath);
}
return value;
}
if (attributeAsts != null)
{
newValue.Attributes.Clear();
Collection<Attribute> attributeCollection = GetAttributeCollection(attributeAsts);
value = PSVariable.TransformValue(attributeCollection, value);
if (!PSVariable.IsValidValue(attributeCollection, value))
{
ValidationMetadataException exception = new ValidationMetadataException("ValidateSetFailure", null, Metadata.InvalidValueFailure, new object[] { newValue.Name, (value != null) ? value.ToString() : "" });
throw exception;
}
newValue.SetValueRaw(value, true);
newValue.AddParameterAttributesNoChecks(attributeCollection);
if (executionContext._debuggingMode > 0)
{
executionContext.Debugger.CheckVariableWrite(variablePath.UnqualifiedPath);
}
return value;
}
newValue.Value = value;
return value;
}
public VariableExpressionAst(IScriptExtent extent, VariablePath variablePath, bool splatted)
: base(extent)
{
this.VariablePath = variablePath;
}
internal object GetVariableValueAtScope(string name, string scopeID)
{
if (name == null)
{
throw PSTraceSource.NewArgumentNullException("name");
}
VariablePath path = new VariablePath(name);
SessionStateScope scopeByID = null;
scopeByID = this.GetScopeByID(scopeID);
object obj2 = null;
if (path.IsVariable)
{
obj2 = scopeByID.GetVariable(path.QualifiedName);
}
else
{
PSDriveInfo drive = scopeByID.GetDrive(path.DriveName);
if (drive != null)
{
CmdletProviderContext context = new CmdletProviderContext(this.ExecutionContext) {
Drive = drive
};
Collection<IContentReader> contentReader = null;
try
{
contentReader = this.GetContentReader(new string[] { path.QualifiedName }, context);
}
catch (ItemNotFoundException)
{
return null;
}
catch (System.Management.Automation.DriveNotFoundException)
{
return null;
}
catch (ProviderNotFoundException)
{
return null;
}
catch (NotImplementedException exception)
{
ProviderInfo provider = null;
this.Globber.GetProviderPath(path.QualifiedName, out provider);
throw this.NewProviderInvocationException("ProviderCannotBeUsedAsVariable", SessionStateStrings.ProviderCannotBeUsedAsVariable, provider, path.QualifiedName, exception, false);
}
catch (NotSupportedException exception2)
{
ProviderInfo info3 = null;
this.Globber.GetProviderPath(path.QualifiedName, out info3);
throw this.NewProviderInvocationException("ProviderCannotBeUsedAsVariable", SessionStateStrings.ProviderCannotBeUsedAsVariable, info3, path.QualifiedName, exception2, false);
}
if ((contentReader == null) || (contentReader.Count == 0))
{
return null;
}
if (contentReader.Count > 1)
{
foreach (IContentReader reader in contentReader)
{
reader.Close();
}
PSArgumentException e = PSTraceSource.NewArgumentException("path", "SessionStateStrings", "VariablePathResolvedToMultiple", new object[] { name });
ProviderInfo info4 = null;
this.Globber.GetProviderPath(path.QualifiedName, out info4);
throw this.NewProviderInvocationException("ProviderVariableSyntaxInvalid", SessionStateStrings.ProviderVariableSyntaxInvalid, info4, path.QualifiedName, e);
}
IContentReader reader2 = contentReader[0];
try
{
IList list = reader2.Read(-1L);
if (list != null)
{
if (list.Count == 0)
{
obj2 = null;
}
else if (list.Count == 1)
{
obj2 = list[0];
}
else
{
obj2 = list;
}
}
}
catch (Exception exception4)
{
ProviderInfo info5 = null;
this.Globber.GetProviderPath(path.QualifiedName, out info5);
CommandProcessorBase.CheckForSevereException(exception4);
ProviderInvocationException exception5 = new ProviderInvocationException("ProviderContentReadError", SessionStateStrings.ProviderContentReadError, info5, path.QualifiedName, exception4);
throw exception5;
}
finally
{
reader2.Close();
}
}
}
if (obj2 != null)
{
PSVariable variable = obj2 as PSVariable;
if (variable != null)
{
return variable.Value;
}
try
{
DictionaryEntry entry = (DictionaryEntry) obj2;
obj2 = entry.Value;
}
catch (InvalidCastException)
{
}
}
return obj2;
}
internal PSVariable GetVariableAtScope(string name, string scopeID)
{
if (name == null)
{
throw PSTraceSource.NewArgumentNullException("name");
}
VariablePath path = new VariablePath(name);
SessionStateScope scopeByID = null;
scopeByID = this.GetScopeByID(scopeID);
PSVariable variable = null;
if (path.IsVariable)
{
variable = scopeByID.GetVariable(path.QualifiedName);
}
return variable;
}
internal object SetVariable(VariablePath variablePath, object newValue, bool asValue, bool force, CommandOrigin origin)
{
if (variablePath == null)
{
throw PSTraceSource.NewArgumentNullException("variablePath");
}
CmdletProviderContext context = null;
SessionStateScope currentScope = null;
if (variablePath.IsVariable)
{
if (variablePath.IsLocal || variablePath.IsUnscopedVariable)
{
currentScope = this.currentScope;
}
else if (variablePath.IsScript)
{
currentScope = this.currentScope.ScriptScope;
}
else if (variablePath.IsGlobal)
{
currentScope = this._globalScope;
}
else if (variablePath.IsPrivate)
{
currentScope = this.currentScope;
}
PSVariable variable = currentScope.SetVariable(variablePath.QualifiedName, newValue, asValue, force, this, origin, false);
if (variablePath.IsPrivate && (variable != null))
{
variable.Options |= ScopedItemOptions.Private;
}
return variable;
}
this.GetVariableValue(variablePath, out context, out currentScope);
Collection<IContentWriter> contentWriter = null;
try
{
if (context != null)
{
try
{
CmdletProviderContext context2 = new CmdletProviderContext(context);
this.ClearContent(new string[] { variablePath.QualifiedName }, context2);
}
catch (NotSupportedException)
{
}
catch (ItemNotFoundException)
{
}
contentWriter = this.GetContentWriter(new string[] { variablePath.QualifiedName }, context);
context.ThrowFirstErrorOrDoNothing(true);
}
else
{
try
{
this.ClearContent(new string[] { variablePath.QualifiedName }, false, false);
}
catch (NotSupportedException)
{
}
catch (ItemNotFoundException)
{
}
contentWriter = this.GetContentWriter(new string[] { variablePath.QualifiedName }, false, false);
}
}
catch (NotImplementedException exception)
{
ProviderInfo provider = null;
this.Globber.GetProviderPath(variablePath.QualifiedName, out provider);
throw this.NewProviderInvocationException("ProviderCannotBeUsedAsVariable", SessionStateStrings.ProviderCannotBeUsedAsVariable, provider, variablePath.QualifiedName, exception, false);
}
catch (NotSupportedException exception2)
{
ProviderInfo info2 = null;
this.Globber.GetProviderPath(variablePath.QualifiedName, out info2);
throw this.NewProviderInvocationException("ProviderCannotBeUsedAsVariable", SessionStateStrings.ProviderCannotBeUsedAsVariable, info2, variablePath.QualifiedName, exception2, false);
}
if ((contentWriter == null) || (contentWriter.Count == 0))
{
ItemNotFoundException exception3 = new ItemNotFoundException(variablePath.QualifiedName, "PathNotFound", SessionStateStrings.PathNotFound);
throw exception3;
}
if (contentWriter.Count > 1)
{
foreach (IContentWriter writer in contentWriter)
{
writer.Close();
}
PSArgumentException e = PSTraceSource.NewArgumentException("path", "SessionStateStrings", "VariablePathResolvedToMultiple", new object[] { variablePath.QualifiedName });
ProviderInfo info3 = null;
this.Globber.GetProviderPath(variablePath.QualifiedName, out info3);
throw this.NewProviderInvocationException("ProviderVariableSyntaxInvalid", SessionStateStrings.ProviderVariableSyntaxInvalid, info3, variablePath.QualifiedName, e);
}
IContentWriter writer2 = contentWriter[0];
IList content = newValue as IList;
if (content == null)
{
content = new object[] { newValue };
}
try
{
writer2.Write(content);
}
catch (Exception exception5)
{
ProviderInfo info4 = null;
this.Globber.GetProviderPath(variablePath.QualifiedName, out info4);
CommandProcessorBase.CheckForSevereException(exception5);
ProviderInvocationException exception6 = new ProviderInvocationException("ProviderContentWriteError", SessionStateStrings.ProviderContentWriteError, info4, variablePath.QualifiedName, exception5);
throw exception6;
}
finally
{
writer2.Close();
}
return null;
}
internal void SetVariableValue(string name, object newValue, CommandOrigin origin)
{
if (name == null)
{
throw PSTraceSource.NewArgumentNullException("name");
}
VariablePath variablePath = new VariablePath(name);
this.SetVariable(variablePath, newValue, true, origin);
}
internal object SetVariable(VariablePath variablePath, object newValue, bool asValue, CommandOrigin origin)
{
return this.SetVariable(variablePath, newValue, asValue, false, origin);
}
internal object GetVariableValueFromProvider(VariablePath variablePath, out CmdletProviderContext context, out SessionStateScope scope, CommandOrigin origin)
{
scope = null;
if (variablePath == null)
{
throw PSTraceSource.NewArgumentNullException("variablePath");
}
context = null;
DriveScopeItemSearcher searcher = new DriveScopeItemSearcher(this, variablePath);
object obj2 = null;
if (searcher.MoveNext())
{
PSDriveInfo current = (PSDriveInfo)searcher.Current;
if (current == null)
{
return obj2;
}
context = new CmdletProviderContext(this.ExecutionContext, origin);
context.Drive = current;
Collection<IContentReader> contentReader = null;
try
{
contentReader = this.GetContentReader(new string[] { variablePath.QualifiedName }, context);
}
catch (ItemNotFoundException)
{
return obj2;
}
catch (System.Management.Automation.DriveNotFoundException)
{
return obj2;
}
catch (ProviderNotFoundException)
{
return obj2;
}
catch (NotImplementedException exception)
{
ProviderInfo provider = null;
this.Globber.GetProviderPath(variablePath.QualifiedName, out provider);
throw this.NewProviderInvocationException("ProviderCannotBeUsedAsVariable", SessionStateStrings.ProviderCannotBeUsedAsVariable, provider, variablePath.QualifiedName, exception, false);
}
catch (NotSupportedException exception2)
{
ProviderInfo info3 = null;
this.Globber.GetProviderPath(variablePath.QualifiedName, out info3);
throw this.NewProviderInvocationException("ProviderCannotBeUsedAsVariable", SessionStateStrings.ProviderCannotBeUsedAsVariable, info3, variablePath.QualifiedName, exception2, false);
}
if ((contentReader == null) || (contentReader.Count == 0))
{
return obj2;
}
if (contentReader.Count > 1)
{
foreach (IContentReader reader in contentReader)
{
reader.Close();
}
PSArgumentException e = PSTraceSource.NewArgumentException("path", "SessionStateStrings", "VariablePathResolvedToMultiple", new object[] { variablePath.QualifiedName });
ProviderInfo info4 = null;
this.Globber.GetProviderPath(variablePath.QualifiedName, out info4);
throw this.NewProviderInvocationException("ProviderVariableSyntaxInvalid", SessionStateStrings.ProviderVariableSyntaxInvalid, info4, variablePath.QualifiedName, e);
}
IContentReader reader2 = contentReader[0];
try
{
IList list = reader2.Read(-1L);
if (list == null)
{
return obj2;
}
if (list.Count == 0)
{
return null;
}
if (list.Count == 1)
{
return list[0];
}
return list;
}
catch (Exception exception4)
{
ProviderInfo info5 = null;
this.Globber.GetProviderPath(variablePath.QualifiedName, out info5);
CommandProcessorBase.CheckForSevereException(exception4);
ProviderInvocationException exception5 = new ProviderInvocationException("ProviderContentReadError", SessionStateStrings.ProviderContentReadError, info5, variablePath.QualifiedName, exception4);
throw exception5;
}
finally
{
reader2.Close();
}
}
return obj2;
}
internal void RemoveVariable(PSVariable variable, bool force)
{
if (variable == null)
{
throw PSTraceSource.NewArgumentNullException("variable");
}
VariablePath variablePath = new VariablePath(variable.Name);
SessionStateScope scope = null;
if (this.GetVariableItem(variablePath, out scope) != null)
{
scope.RemoveVariable(variablePath.QualifiedName, force);
}
}
internal void RemoveVariableAtScope(PSVariable variable, string scopeID, bool force)
{
if (variable == null)
{
throw PSTraceSource.NewArgumentNullException("variable");
}
VariablePath path = new VariablePath(variable.Name);
this.GetScopeByID(scopeID).RemoveVariable(path.QualifiedName, force);
}
internal object GetVariableValue(VariablePath variablePath, out CmdletProviderContext context, out SessionStateScope scope)
{
context = null;
scope = null;
object obj2 = null;
if (variablePath.IsVariable)
{
PSVariable variableItem = this.GetVariableItem(variablePath, out scope);
if (variableItem != null)
{
obj2 = variableItem.Value;
}
return obj2;
}
return this.GetVariableValueFromProvider(variablePath, out context, out scope, this.currentScope.ScopeOrigin);
}
internal PSVariable GetVariableItem(VariablePath variablePath, out SessionStateScope scope)
{
return this.GetVariableItem(variablePath, out scope, CommandOrigin.Internal);
}
internal object GetVariableValue(string name)
{
if (name == null)
{
throw PSTraceSource.NewArgumentNullException("name");
}
VariablePath variablePath = new VariablePath(name);
CmdletProviderContext context = null;
SessionStateScope scope = null;
return this.GetVariableValue(variablePath, out context, out scope);
}
internal static object SetVariableValue(VariablePath variablePath, object value, ExecutionContext executionContext, AttributeBaseAst[] attributeAsts)
{
SessionStateInternal sessionState = executionContext.EngineSessionState;
CommandOrigin origin = sessionState.CurrentScope.ScopeOrigin;
if (!variablePath.IsVariable)
{
sessionState.SetVariable(variablePath, value, true, origin);
return(value);
}
// Variable assignment is traced only if trace level 2 is specified.
if (executionContext.PSDebugTraceLevel > 1)
{
executionContext.Debugger.TraceVariableSet(variablePath.UnqualifiedPath, value);
}
if (variablePath.IsUnscopedVariable)
{
variablePath = variablePath.CloneAndSetLocal();
}
SessionStateScope scope;
PSVariable var = sessionState.GetVariableItem(variablePath, out scope, origin);
if (var == null)
{
var attributes = attributeAsts == null
? new Collection <Attribute>()
: GetAttributeCollection(attributeAsts);
var = new PSVariable(variablePath.UnqualifiedPath, value, ScopedItemOptions.None, attributes);
sessionState.SetVariable(variablePath, var, false, origin);
if (executionContext._debuggingMode > 0)
{
executionContext.Debugger.CheckVariableWrite(variablePath.UnqualifiedPath);
}
}
else if (attributeAsts != null)
{
// Use bytewise operation directly instead of 'var.IsReadOnly || var.IsConstant' on
// a hot path (setting variable with type constraint) to get better performance.
if ((var.Options & (ScopedItemOptions.ReadOnly | ScopedItemOptions.Constant)) != ScopedItemOptions.None)
{
SessionStateUnauthorizedAccessException e =
new SessionStateUnauthorizedAccessException(
var.Name,
SessionStateCategory.Variable,
"VariableNotWritable",
SessionStateStrings.VariableNotWritable);
throw e;
}
var attributes = GetAttributeCollection(attributeAsts);
value = PSVariable.TransformValue(attributes, value);
if (!PSVariable.IsValidValue(attributes, value))
{
ValidationMetadataException e = new ValidationMetadataException(
"ValidateSetFailure",
null,
Metadata.InvalidValueFailure,
var.Name,
((value != null) ? value.ToString() : "$null"));
throw e;
}
var.SetValueRaw(value, true);
// Don't update the PSVariable's attributes until we successfully set the value
var.Attributes.Clear();
var.AddParameterAttributesNoChecks(attributes);
if (executionContext._debuggingMode > 0)
{
executionContext.Debugger.CheckVariableWrite(variablePath.UnqualifiedPath);
}
}
else
{
// The setter will handle checking for variable writes.
var.Value = value;
}
return(value);
}
internal static string GetUnaliasedVariableName(VariablePath varPath)
{
return GetUnaliasedVariableName(varPath.UnqualifiedPath);
}
internal static object GetVariableValue(VariablePath variablePath, ExecutionContext executionContext, VariableExpressionAst varAst)
{
SessionStateScope scope2;
if (!variablePath.IsVariable)
{
CmdletProviderContext context;
SessionStateScope scope;
SessionStateInternal internal2 = executionContext.EngineSessionState;
return internal2.GetVariableValueFromProvider(variablePath, out context, out scope, internal2.CurrentScope.ScopeOrigin);
}
SessionStateInternal engineSessionState = executionContext.EngineSessionState;
CommandOrigin scopeOrigin = engineSessionState.CurrentScope.ScopeOrigin;
PSVariable variable = engineSessionState.GetVariableItem(variablePath, out scope2, scopeOrigin);
if (variable != null)
{
return variable.Value;
}
if (engineSessionState.ExecutionContext._debuggingMode > 0)
{
engineSessionState.ExecutionContext.Debugger.CheckVariableRead(variablePath.UnqualifiedPath);
}
if (ThrowStrictModeUndefinedVariable(executionContext, varAst))
{
throw InterpreterError.NewInterpreterException(variablePath.UserPath, typeof(RuntimeException), varAst.Extent, "VariableIsUndefined", ParserStrings.VariableIsUndefined, new object[] { variablePath.UserPath });
}
return null;
}
/// <summary>
/// The main processing loop of the command.
/// </summary>
///
protected override void ProcessRecord()
{
string path = GetFilePath();
if (path == null)
{
return;
}
if (!File.Exists(path))
{
InvalidOperationException ioe =
PSTraceSource.NewInvalidOperationException(
ImportLocalizedDataStrings.FileNotExist,
path);
WriteError(new ErrorRecord(ioe, "ImportLocalizedData", ErrorCategory.ObjectNotFound, path));
return;
}
// Prevent additional commands in ConstrainedLanguage mode
if (Context.LanguageMode == PSLanguageMode.ConstrainedLanguage)
{
if (_setSupportedCommand)
{
NotSupportedException nse =
PSTraceSource.NewNotSupportedException(
ImportLocalizedDataStrings.CannotDefineSupportedCommand);
ThrowTerminatingError(
new ErrorRecord(nse, "CannotDefineSupportedCommand", ErrorCategory.PermissionDenied, null));
}
}
string script = GetScript(path);
if (script == null)
{
return;
}
try
{
var scriptBlock = Context.Engine.ParseScriptBlock(script, false);
scriptBlock.CheckRestrictedLanguage(SupportedCommand, null, false);
object result;
PSLanguageMode oldLanguageMode = Context.LanguageMode;
Context.LanguageMode = PSLanguageMode.RestrictedLanguage;
try
{
result = scriptBlock.InvokeReturnAsIs();
if (result == AutomationNull.Value)
{
result = null;
}
}
finally
{
Context.LanguageMode = oldLanguageMode;
}
if (_bindingVariable != null)
{
VariablePath variablePath = new VariablePath(_bindingVariable);
if (variablePath.IsUnscopedVariable)
{
variablePath = variablePath.CloneAndSetLocal();
}
if (string.IsNullOrEmpty(variablePath.UnqualifiedPath))
{
InvalidOperationException ioe = PSTraceSource.NewInvalidOperationException(
ImportLocalizedDataStrings.IncorrectVariableName, _bindingVariable);
WriteError(new ErrorRecord(ioe, "ImportLocalizedData", ErrorCategory.InvalidArgument,
_bindingVariable));
return;
}
SessionStateScope scope = null;
PSVariable variable = SessionState.Internal.GetVariableItem(variablePath, out scope);
if (variable == null)
{
variable = new PSVariable(variablePath.UnqualifiedPath, result, ScopedItemOptions.None);
Context.EngineSessionState.SetVariable(variablePath, variable, false, CommandOrigin.Internal);
}
else
{
variable.Value = result;
}
} // end _bindingvariable != null
// If binding variable is null, write the object to stream
else
{
WriteObject(result);
}
}
catch (RuntimeException e)
{
PSInvalidOperationException ioe = PSTraceSource.NewInvalidOperationException(e,
ImportLocalizedDataStrings.ErrorLoadingDataFile,
path,
e.Message);
throw ioe;
}
return;
} // ProcessRecord
/// <summary>
/// Derived classes override this method to return their
/// particular type of scoped item.
/// </summary>
/// <param name="scope">
/// The scope to look the item up in.
/// </param>
/// <param name="name">
/// The name of the item to retrieve.
/// </param>
/// <param name="newCurrentItem">
/// The scope item that the derived class should return.
/// </param>
/// <returns>
/// True if the scope item was found or false otherwise.
/// </returns>
protected abstract bool GetScopeItem(
SessionStateScope scope,
VariablePath name,
out T newCurrentItem);
internal static string GetUnaliasedVariableName(VariablePath varPath)
{
VariablePathFlags knownFlags = VariablePathFlags.None;
string path = varPath.ToString();
int currentCharIndex = 0;
int lastScannedColon = -1;
string candidateScope = null;
string candidateScopeUpper = null;
string unqualifiedPath;
VariablePathFlags _flags = VariablePathFlags.None;
VariablePathFlags candidateFlags = VariablePathFlags.Unqualified;
if (varPath.IsDriveQualified)
{
knownFlags = VariablePathFlags.DriveQualified;
}
scanScope:
switch (path[0])
{
case 'g':
case 'G':
candidateScope = "lobal";
candidateScopeUpper = "LOBAL";
candidateFlags = VariablePathFlags.Global;
break;
case 'l':
case 'L':
candidateScope = "ocal";
candidateScopeUpper = "OCAL";
candidateFlags = VariablePathFlags.Local;
break;
case 'p':
case 'P':
candidateScope = "rivate";
candidateScopeUpper = "RIVATE";
candidateFlags = VariablePathFlags.Private;
break;
case 's':
case 'S':
candidateScope = "cript";
candidateScopeUpper = "CRIPT";
candidateFlags = VariablePathFlags.Script;
break;
case 'v':
case 'V':
if (knownFlags == VariablePathFlags.None)
{
// If we see 'variable:', our namespaceId will be empty, and
// we'll also need to scan for the scope again.
candidateScope = "ariable";
candidateScopeUpper = "ARIABLE";
candidateFlags = VariablePathFlags.Variable;
}
break;
}
if (candidateScope != null)
{
currentCharIndex += 1; // First character already matched.
int j;
for (j = 0; currentCharIndex < path.Length && j < candidateScope.Length; ++j, ++currentCharIndex)
{
if (path[currentCharIndex] != candidateScope[j] && path[currentCharIndex] != candidateScopeUpper[j])
{
break;
}
}
if (j == candidateScope.Length &&
currentCharIndex < path.Length &&
path[currentCharIndex] == ':')
{
if (_flags == VariablePathFlags.None)
{
_flags = VariablePathFlags.Variable;
}
_flags |= candidateFlags;
lastScannedColon = currentCharIndex;
currentCharIndex += 1;
// If saw 'variable:', we need to look for a scope after 'variable:'.
if (candidateFlags == VariablePathFlags.Variable)
{
knownFlags = VariablePathFlags.Variable;
candidateScope = candidateScopeUpper = null;
candidateFlags = VariablePathFlags.None;
goto scanScope;
}
}
}
if (_flags == VariablePathFlags.None)
{
lastScannedColon = path.IndexOf(':', currentCharIndex);
// No colon, or a colon as the first character means we have
// a simple variable, otherwise it's a drive.
if (lastScannedColon > 0)
{
_flags = VariablePathFlags.DriveQualified;
}
}
if (lastScannedColon == -1)
{
unqualifiedPath = path;
}
else
{
unqualifiedPath = path.Substring(lastScannedColon + 1);
}
if (_flags == VariablePathFlags.None)
{
_flags = VariablePathFlags.Unqualified | VariablePathFlags.Variable;
}
return GetUnaliasedVariableName(unqualifiedPath);
}
internal static PSReference GetVariableAsRef(VariablePath variablePath, ExecutionContext executionContext, Type staticType)
{
Diagnostics.Assert(variablePath.IsVariable, "calller to verify varpath is a variable.");
SessionStateInternal sessionState = executionContext.EngineSessionState;
CommandOrigin origin = sessionState.CurrentScope.ScopeOrigin;
SessionStateScope scope;
PSVariable var = sessionState.GetVariableItem(variablePath, out scope, origin);
if (var == null)
{
throw InterpreterError.NewInterpreterException(variablePath, typeof(RuntimeException), null,
"NonExistingVariableReference",
ParserStrings.NonExistingVariableReference);
}
object value = var.Value;
if (staticType == null && value != null)
{
value = PSObject.Base(value);
if (value != null)
{
staticType = value.GetType();
}
}
if (staticType == null)
{
var declaredType = var.Attributes.OfType<ArgumentTypeConverterAttribute>().FirstOrDefault();
staticType = declaredType != null ? declaredType.TargetType : typeof(LanguagePrimitives.Null);
}
return PSReference.CreateInstance(var, staticType);
}
public FunctionScopeItemSearcher(SessionStateInternal sessionState, VariablePath lookupPath, CommandOrigin origin) : base(sessionState, lookupPath)
{
this.name = string.Empty;
this._origin = origin;
}
internal void SetVariable(VariablePath path, object newValue)
{
this._engineSessionState.SetVariable(path, newValue, true, CommandOrigin.Internal);
}
internal PSVariable GetVariableItem(VariablePath variablePath, out SessionStateScope scope, CommandOrigin origin)
{
scope = null;
if (variablePath == null)
{
throw PSTraceSource.NewArgumentNullException("variablePath");
}
VariableScopeItemSearcher searcher = new VariableScopeItemSearcher(this, variablePath, origin);
PSVariable current = null;
if (searcher.MoveNext())
{
current = (PSVariable)searcher.Current;
scope = searcher.CurrentLookupScope;
}
return current;
}
internal VariablePath CloneAndSetLocal()
{
Debug.Assert(IsUnscopedVariable, "Special method to clone, input must be unqualified");
VariablePath result = new VariablePath();
result._userPath = _userPath;
result._unqualifiedPath = _unqualifiedPath;
result._flags = VariablePathFlags.Local | VariablePathFlags.Variable;
return result;
}
internal static object SetVariableValue(VariablePath variablePath, object value, ExecutionContext executionContext, AttributeBaseAst[] attributeAsts)
{
SessionStateInternal sessionState = executionContext.EngineSessionState;
CommandOrigin origin = sessionState.CurrentScope.ScopeOrigin;
if (!variablePath.IsVariable)
{
sessionState.SetVariable(variablePath, value, true, origin);
return(value);
}
// Variable assignment is traced only if trace level 2 is specified.
if (executionContext.PSDebugTraceLevel > 1)
{
executionContext.Debugger.TraceVariableSet(variablePath.UnqualifiedPath, value);
}
if (variablePath.IsUnscopedVariable)
{
variablePath = variablePath.CloneAndSetLocal();
}
SessionStateScope scope;
PSVariable var = sessionState.GetVariableItem(variablePath, out scope, origin);
if (var == null)
{
var attributes = attributeAsts == null
? new Collection <Attribute>()
: GetAttributeCollection(attributeAsts);
var = new PSVariable(variablePath.UnqualifiedPath, value, ScopedItemOptions.None, attributes);
sessionState.SetVariable(variablePath, var, false, origin);
if (executionContext._debuggingMode > 0)
{
executionContext.Debugger.CheckVariableWrite(variablePath.UnqualifiedPath);
}
}
else if (attributeAsts != null)
{
var.Attributes.Clear();
var attributes = GetAttributeCollection(attributeAsts);
value = PSVariable.TransformValue(attributes, value);
if (!PSVariable.IsValidValue(attributes, value))
{
ValidationMetadataException e = new ValidationMetadataException(
"ValidateSetFailure",
null,
Metadata.InvalidValueFailure,
var.Name,
((value != null) ? value.ToString() : "$null"));
throw e;
}
var.SetValueRaw(value, true);
var.AddParameterAttributesNoChecks(attributes);
if (executionContext._debuggingMode > 0)
{
executionContext.Debugger.CheckVariableWrite(variablePath.UnqualifiedPath);
}
}
else
{
// The setter will handle checking for variable writes.
var.Value = value;
}
return(value);
}
internal void RemoveVariableAtScope(string name, string scopeID, bool force)
{
if (string.IsNullOrEmpty(name))
{
throw PSTraceSource.NewArgumentException("name");
}
VariablePath path = new VariablePath(name);
SessionStateScope scopeByID = null;
scopeByID = this.GetScopeByID(scopeID);
if (path.IsVariable)
{
scopeByID.RemoveVariable(path.QualifiedName, force);
}
else
{
PSDriveInfo drive = scopeByID.GetDrive(path.DriveName);
if (drive != null)
{
CmdletProviderContext context = new CmdletProviderContext(this.ExecutionContext) {
Drive = drive,
Force = force
};
this.RemoveItem(new string[] { path.QualifiedName }, false, context);
context.ThrowFirstErrorOrDoNothing();
}
}
}
internal void RemoveVariable(string name, bool force)
{
if (name == null)
{
throw PSTraceSource.NewArgumentNullException("name");
}
VariablePath variablePath = new VariablePath(name);
SessionStateScope scope = null;
if (variablePath.IsVariable)
{
if (this.GetVariableItem(variablePath, out scope) != null)
{
scope.RemoveVariable(variablePath.QualifiedName, force);
}
}
else
{
CmdletProviderContext context = new CmdletProviderContext(this.ExecutionContext) {
Force = force
};
this.RemoveItem(new string[] { variablePath.QualifiedName }, false, context);
context.ThrowFirstErrorOrDoNothing();
}
}
internal static bool IsImplicitVariableAccessibleInClassMethod(VariablePath variablePath)
{
return(s_classMethodsAccessibleVariables.Contains(variablePath.UserPath));
}
internal object SetVariable(PSVariable variable, bool force, CommandOrigin origin)
{
if ((variable == null) || string.IsNullOrEmpty(variable.Name))
{
throw PSTraceSource.NewArgumentException("variable");
}
VariablePath variablePath = new VariablePath(variable.Name, VariablePathFlags.Unqualified | VariablePathFlags.Variable);
return this.SetVariable(variablePath, variable, false, force, origin);
}