Add source package for file-based programs support

src/Cli/Microsoft.DotNet.FileBasedPrograms/.editorconfig

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+[*.cs]
+
+# IDE0240: Remove redundant nullable directive
+# The directive needs to be included since all sources in a source package are considered generated code
+# when referenced from a project via package reference.
+dotnet_diagnostic.IDE0240.severity = none

src/Cli/Microsoft.DotNet.FileBasedPrograms/ExternalHelpers.cs

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+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+
+#nullable enable
+using System;
+using System.IO;
+
+namespace Microsoft.DotNet.FileBasedPrograms;
+
+/// <summary>
+/// When targeting netstandard2.0, the user of the source package must "implement" certain methods by declaring members in this type.
+/// </summary>
+partial class ExternalHelpers
+{
+    public static partial int CombineHashCodes(int value1, int value2);
+    public static partial string GetRelativePath(string relativeTo, string path);
+
+    public static partial bool IsPathFullyQualified(string path);
+
+#if NET
+    public static partial int CombineHashCodes(int value1, int value2)
+        => HashCode.Combine(value1, value2);
+
+    public static partial string GetRelativePath(string relativeTo, string path)
+        => Path.GetRelativePath(relativeTo, path);
+
+    public static partial bool IsPathFullyQualified(string path)
+        => Path.IsPathFullyQualified(path);
+
+#elif FILE_BASED_PROGRAMS_SOURCE_PACKAGE_BUILD
+    // This path should only be used when we are verifying that the source package itself builds under netstandard2.0.
+    public static partial int CombineHashCodes(int value1, int value2)
+        => throw new NotImplementedException();
+
+    public static partial string GetRelativePath(string relativeTo, string path)
+        => throw new NotImplementedException();
+
+    public static partial bool IsPathFullyQualified(string path)
+        => throw new NotImplementedException();
+
+#endif
+}
+
+#if FILE_BASED_PROGRAMS_SOURCE_PACKAGE_GRACEFUL_EXCEPTION
+internal class GracefulException : Exception
+{
+    public GracefulException()
+    {
+    }
+
+    public GracefulException(string? message) : base(message)
+    {
+    }
+
+    public GracefulException(string format, string arg) : this(string.Format(format, arg))
+    {
+    }
+
+    public GracefulException(string? message, Exception? innerException) : base(message, innerException)
+    {
+    }
+}
+#endif

src/Cli/Microsoft.DotNet.FileBasedPrograms/FileBasedProgramsResources.resx

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+<?xml version="1.0" encoding="utf-8"?>
+<root>
+  <!-- 
+    Microsoft ResX Schema 
+
+    Version 2.0
+
+    The primary goals of this format is to allow a simple XML format 
+    that is mostly human readable. The generation and parsing of the 
+    various data types are done through the TypeConverter classes 
+    associated with the data types.
+
+    Example:
+
+    ... ado.net/XML headers & schema ...
+    <resheader name="resmimetype">text/microsoft-resx</resheader>
+    <resheader name="version">2.0</resheader>
+    <resheader name="reader">System.Resources.ResXResourceReader, System.Windows.Forms, ...</resheader>
+    <resheader name="writer">System.Resources.ResXResourceWriter, System.Windows.Forms, ...</resheader>
+    <data name="Name1"><value>this is my long string</value><comment>this is a comment</comment></data>
+    <data name="Color1" type="System.Drawing.Color, System.Drawing">Blue</data>
+    <data name="Bitmap1" mimetype="application/x-microsoft.net.object.binary.base64">
+        <value>[base64 mime encoded serialized .NET Framework object]</value>
+    </data>
+    <data name="Icon1" type="System.Drawing.Icon, System.Drawing" mimetype="application/x-microsoft.net.object.bytearray.base64">
+        <value>[base64 mime encoded string representing a byte array form of the .NET Framework object]</value>
+        <comment>This is a comment</comment>
+    </data>
+
+    There are any number of "resheader" rows that contain simple 
+    name/value pairs.
+
+    Each data row contains a name, and value. The row also contains a 
+    type or mimetype. Type corresponds to a .NET class that support 
+    text/value conversion through the TypeConverter architecture. 
+    Classes that don't support this are serialized and stored with the 
+    mimetype set.
+
+    The mimetype is used for serialized objects, and tells the 
+    ResXResourceReader how to depersist the object. This is currently not 
+    extensible. For a given mimetype the value must be set accordingly:
+
+    Note - application/x-microsoft.net.object.binary.base64 is the format 
+    that the ResXResourceWriter will generate, however the reader can 
+    read any of the formats listed below.
+
+    mimetype: application/x-microsoft.net.object.binary.base64
+    value   : The object must be serialized with 
+            : System.Runtime.Serialization.Formatters.Binary.BinaryFormatter
+            : and then encoded with base64 encoding.
+
+    mimetype: application/x-microsoft.net.object.soap.base64
+    value   : The object must be serialized with 
+            : System.Runtime.Serialization.Formatters.Soap.SoapFormatter
+            : and then encoded with base64 encoding.
+
+    mimetype: application/x-microsoft.net.object.bytearray.base64
+    value   : The object must be serialized into a byte array 
+            : using a System.ComponentModel.TypeConverter
+            : and then encoded with base64 encoding.
+    -->
+  <xsd:schema id="root" xmlns="" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:msdata="urn:schemas-microsoft-com:xml-msdata">
+    <xsd:import namespace="http://www.w3.org/XML/1998/namespace" />
+    <xsd:element name="root" msdata:IsDataSet="true">
+      <xsd:complexType>
+        <xsd:choice maxOccurs="unbounded">
+          <xsd:element name="metadata">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" />
+              </xsd:sequence>
+              <xsd:attribute name="name" use="required" type="xsd:string" />
+              <xsd:attribute name="type" type="xsd:string" />
+              <xsd:attribute name="mimetype" type="xsd:string" />
+              <xsd:attribute ref="xml:space" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="assembly">
+            <xsd:complexType>
+              <xsd:attribute name="alias" type="xsd:string" />
+              <xsd:attribute name="name" type="xsd:string" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="data">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+                <xsd:element name="comment" type="xsd:string" minOccurs="0" msdata:Ordinal="2" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" use="required" msdata:Ordinal="1" />
+              <xsd:attribute name="type" type="xsd:string" msdata:Ordinal="3" />
+              <xsd:attribute name="mimetype" type="xsd:string" msdata:Ordinal="4" />
+              <xsd:attribute ref="xml:space" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="resheader">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" use="required" />
+            </xsd:complexType>
+          </xsd:element>
+        </xsd:choice>
+      </xsd:complexType>
+    </xsd:element>
+  </xsd:schema>
+  <resheader name="resmimetype">
+    <value>text/microsoft-resx</value>
+  </resheader>
+  <resheader name="version">
+    <value>2.0</value>
+  </resheader>
+  <resheader name="reader">
+    <value>System.Resources.ResXResourceReader, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+  <resheader name="writer">
+    <value>System.Resources.ResXResourceWriter, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+  <data name="CouldNotFindAnyProjectInDirectory" xml:space="preserve">
+    <value>Could not find any project in `{0}`.</value>
+  </data>
+  <data name="CouldNotFindProjectOrDirectory" xml:space="preserve">
+    <value>Could not find project or directory `{0}`.</value>
+  </data>
+  <data name="MoreThanOneProjectInDirectory" xml:space="preserve">
+    <value>Found more than one project in `{0}`. Specify which one to use.</value>
+  </data>
+  <data name="PropertyDirectiveInvalidName" xml:space="preserve">
+    <value>Invalid property name: {0}</value>
+    <comment>{0} is an inner exception message.</comment>
+  </data>
+  <data name="PropertyDirectiveMissingParts" xml:space="preserve">
+    <value>The property directive needs to have two parts separated by '=' like '#:property PropertyName=PropertyValue'.</value>
+    <comment>{Locked="#:property"}</comment>
+  </data>
+  <data name="StaticGraphRestoreNotSupported" xml:space="preserve">
+    <value>Static graph restore is not supported for file-based apps. Remove the '#:property'.</value>
+    <comment>{Locked="#:property"}</comment>
+  </data>
+  <data name="DirectiveError" xml:space="preserve">
+    <value>error</value>
+    <comment>Used when reporting directive errors like "file(location): error: message".</comment>
+  </data>
+  <data name="InvalidDirectiveName" xml:space="preserve">
+    <value>The directive should contain a name without special characters and an optional value separated by '{1}' like '#:{0} Name{1}Value'.</value>
+    <comment>{0} is the directive type like 'package' or 'sdk'. {1} is the expected separator like '@' or '='.</comment>
+  </data>
+  <data name="CannotConvertDirective" xml:space="preserve">
+    <value>Some directives cannot be converted. Run the file to see all compilation errors. Specify '--force' to convert anyway.</value>
+    <comment>{Locked="--force"}</comment>
+  </data>
+  <data name="DuplicateDirective" xml:space="preserve">
+    <value>Duplicate directives are not supported: {0}</value>
+    <comment>{0} is the directive type and name.</comment>
+  </data>
+  <data name="QuoteInDirective" xml:space="preserve">
+    <value>Directives currently cannot contain double quotes (").</value>
+  </data>
+  <data name="InvalidProjectDirective" xml:space="preserve">
+    <value>The '#:project' directive is invalid: {0}</value>
+    <comment>{0} is the inner error message.</comment>
+  </data>
+  <data name="MissingDirectiveName" xml:space="preserve">
+    <value>Missing name of '{0}'.</value>
+    <comment>{0} is the directive name like 'package' or 'sdk'.</comment>
+  </data>
+  <data name="UnrecognizedDirective" xml:space="preserve">
+    <value>Unrecognized directive '{0}'.</value>
+    <comment>{0} is the directive name like 'package' or 'sdk'.</comment>
+  </data>
+</root>