PS: Add a single upgrade script that upgrades the old dbscheme to the current dbscheme, and add a single downgrade script that downgrades the current dbscheme to the old dbscheme. IMPORTANT: the .gitattributes ensure that we keep CLRF (i.e., windows) line-endings on the old dbscheme scripts so that they match what is produced by the extractor.

Author: MathiasVP

.gitattributes

@@ -88,3 +88,8 @@
 # swift prebuilt resources
 /swift/third_party/resources/*.zip filter=lfs diff=lfs merge=lfs -text
 /swift/third_party/resources/*.tar.zst filter=lfs diff=lfs merge=lfs -text
+
+# This upgrade script must use windows line-endings to be compatible with old
+# databases.
+/powershell/ql/lib/upgrades/ce269c61feda10a8ca0d16519085f7e55741a694/old.dbscheme eol=crlf
+/powershell/downgrades/802d5b9f407fb0dac894df1c0b4584f2215e1512/semmlecode.powershell.dbscheme eol=crlf

powershell/downgrades/802d5b9f407fb0dac894df1c0b4584f2215e1512/semmlecode.powershell.dbscheme

@@ -41,10 +41,6 @@ containerparent(
   unique int child: @container ref
 );
 
-is_in_psmodule_path(
-  int file: @file ref
-);
-
 /* Comments */
 comment_entity(
   unique int id: @comment_entity,
@@ -68,15 +64,15 @@ extractor_messages(
 );
 
 parent(
-  int child: @ast ref,
-  int parent: @ast ref
+  int parent: @ast ref,
+  int child: @ast ref
 );
 
 /* AST Nodes */
 // This is all the kinds of nodes that can inherit from Ast
 // https://learn.microsoft.com/en-us/dotnet/api/system.management.automation.language.ast?view=powershellsdk-7.3.0
 @ast = @not_implemented | @attribute_base | @catch_clause | @command_element |
-@member | @named_block | @param_block | @parameter | @redirection | @script_block | @statement | @statement_block | @named_attribute_argument;
+@member | @named_block | @param_block | @parameter | @redirection | @script_block | @statement | @statement_block;
 // https://learn.microsoft.com/en-us/dotnet/api/system.management.automation.language.attributebaseast?view=powershellsdk-7.2.0
 @attribute_base = @attribute | @type_constraint;
 
@@ -86,7 +82,7 @@ parent(
 // https://learn.microsoft.com/en-us/dotnet/api/system.management.automation.language.commandbaseast?view=powershellsdk-7.3.0
 @command_base = @command | @command_expression;
 // https://learn.microsoft.com/en-us/dotnet/api/system.management.automation.language.chainableast?view=powershellsdk-7.3.0
-@chainable = @command_base | @pipeline | @pipeline_chain;
+@chainable = @pipeline | @pipeline_chain;
 //https://learn.microsoft.com/en-us/dotnet/api/system.management.automation.language.pipelinebaseast?view=powershellsdk-7.3.0
 @pipeline_base = @chainable | @error_statement | @assignment_statement;
 // https://learn.microsoft.com/en-us/dotnet/api/system.management.automation.language.statementast?view=powershellsdk-7.3.0
@@ -413,13 +409,13 @@ if_statement(
 if_statement_clause(
   int id: @if_statement ref,
   int index: int ref,
-  int item1: @pipeline_base ref,
-  int item2: @statement_block ref
+  int item1: @ast ref,
+  int item2: @ast ref
 )
 
 if_statement_else(
   int id: @if_statement ref,
-  int elseItem: @statement_block ref 
+  int elseItem: @ast ref 
 )
 
 if_statement_location(
@@ -471,7 +467,7 @@ statement_block_trap(
 // https://learn.microsoft.com/en-us/dotnet/api/system.management.automation.language.subexpressionast?view=powershellsdk-7.3.0
 sub_expression(
   unique int id: @sub_expression,
-  int subExpression: @statement_block ref
+  int subExpression: @ast ref
 )
 
 sub_expression_location(
@@ -631,7 +627,7 @@ exit_statement(
 
 exit_statement_pipeline(
   int id: @exit_statement ref,
-  int expression: @pipeline_base ref
+  int expression: @ast ref
 )
 
 exit_statement_location(
@@ -818,7 +814,7 @@ continue_statement_location(
 
 statement_label(
   int id: @labelled_statement ref,
-  int label: @expression ref
+  int label: @ast ref
 )
 
 // ReturnStatementAst
@@ -829,7 +825,7 @@ return_statement(
 
 return_statement_pipeline(
   int id: @return_statement ref,
-  int pipeline: @pipeline_base ref
+  int pipeline: @ast ref
 )
 
 return_statement_location(
@@ -841,12 +837,12 @@ return_statement_location(
 // https://learn.microsoft.com/en-us/dotnet/api/system.management.automation.language.dowhilestatementast?view=powershellsdk-7.3.0
 do_while_statement(
   unique int id: @do_while_statement,
-  int body: @statement_block ref
+  int body: @ast ref
 )
 
 do_while_statement_condition(
   int id: @do_while_statement ref,
-  int condition: @pipeline_base ref
+  int condition: @ast ref
 )
 
 do_while_statement_location(
@@ -858,12 +854,12 @@ do_while_statement_location(
 // https://learn.microsoft.com/en-us/dotnet/api/system.management.automation.language.dountilstatementast?view=powershellsdk-7.3.0
 do_until_statement(
   unique int id: @do_until_statement,
-  int body: @statement_block ref
+  int body: @ast ref
 )
 
 do_until_statement_condition(
   int id: @do_until_statement ref,
-  int condition: @pipeline_base ref
+  int condition: @ast ref
 )
 
 do_until_statement_location(
@@ -875,12 +871,12 @@ do_until_statement_location(
 // https://learn.microsoft.com/en-us/dotnet/api/system.management.automation.language.whilestatementast?view=powershellsdk-7.3.0
 while_statement(
   unique int id: @while_statement,
-  int body: @statement_block ref
+  int body: @ast ref
 )
 
 while_statement_condition(
   int id: @while_statement ref,
-  int condition: @pipeline_base ref
+  int condition: @ast ref
 )
 
 while_statement_location(
@@ -892,9 +888,9 @@ while_statement_location(
 // https://learn.microsoft.com/en-us/dotnet/api/system.management.automation.language.foreachstatementast?view=powershellsdk-7.3.0
 foreach_statement(
   unique int id: @foreach_statement,
-  int variable: @variable_expression ref,
-  int condition: @pipeline_base ref,
-  int body: @statement_block ref,
+  int variable: @ast ref,
+  int condition: @ast ref,
+  int body: @ast ref,
   int flags: int ref
 )
 
@@ -907,7 +903,7 @@ foreach_statement_location(
 // https://learn.microsoft.com/en-us/dotnet/api/system.management.automation.language.forstatementast?view=powershellsdk-7.3.0
 for_statement(
   unique int id: @for_statement,
-  int body: @statement_block ref
+  int body: @ast ref
 )
 
 for_statement_location(
@@ -917,17 +913,17 @@ for_statement_location(
 
 for_statement_condition(
   int id: @for_statement ref,
-  int condition: @pipeline_base ref
+  int condition: @ast ref
 )
 
 for_statement_initializer(
   int id: @for_statement ref,
-  int initializer: @pipeline_base ref
+  int initializer: @ast ref
 )
 
 for_statement_iterator(
   int id: @for_statement ref,
-  int iterator: @pipeline_base ref
+  int iterator: @ast ref
 )
 
 // ExpandableStringExpressionAst
@@ -992,14 +988,14 @@ unary_expression_location(
 // https://learn.microsoft.com/en-us/dotnet/api/system.management.automation.language.catchclauseast?view=powershellsdk-7.3.0
 catch_clause(
   unique int id: @catch_clause,
-  int body: @statement_block ref,
+  int body: @ast ref,
   boolean isCatchAll: boolean ref
 )
 
 catch_clause_catch_type(
   int id: @catch_clause ref,
   int index: int ref,
-  int catch_type: @type_constraint ref
+  int catch_type: @ast ref
 )
 
 catch_clause_location(
@@ -1028,7 +1024,7 @@ throw_statement_pipeline(
 // https://learn.microsoft.com/en-us/dotnet/api/system.management.automation.language.trystatementast?view=powershellsdk-7.3.0
 try_statement(
   unique int id: @try_statement,
-  int body: @statement_block ref
+  int body: @ast ref
 )
 
 try_statement_catch_clause(
@@ -1103,9 +1099,9 @@ token_location(
 // https://learn.microsoft.com/en-us/dotnet/api/system.management.automation.language.configurationdefinitionast?view=powershellsdk-7.3.0
 configuration_definition(
   unique int id: @configuration_definition,
-  int body: @script_block_expression ref,
+  int body: @ast ref,
   int configurationType: int ref,
-  int name: @expression ref
+  int name: @ast ref
 )
 
 configuration_definition_location(
@@ -1117,7 +1113,7 @@ configuration_definition_location(
 // https://learn.microsoft.com/en-us/dotnet/api/system.management.automation.language.datastatementast?view=powershellsdk-7.3.0
 data_statement(
   unique int id: @data_statement,
-  int body: @statement_block ref
+  int body: @ast ref
 )
 
 data_statement_variable(

powershell/downgrades/802d5b9f407fb0dac894df1c0b4584f2215e1512/upgrade.properties

@@ -1,2 +1,2 @@
-description: Remove psmodule file extraction
-compatibility: partial
+description: Unknown
+compatibility: partial