Add version number to Python code comments (#1511)

* feat: Add sqlc version to generated Python code
* feat: Add source file to Python code comments

Author: kyleconroy

examples/python/src/authors/models.py

@@ -1,4 +1,6 @@
 # Code generated by sqlc. DO NOT EDIT.
+# versions:
+#   sqlc v1.12.0
 import dataclasses
 from typing import Optional
 

examples/python/src/authors/query.py

@@ -1,4 +1,7 @@
 # Code generated by sqlc. DO NOT EDIT.
+# versions:
+#   sqlc v1.12.0
+# source: query.sql
 from typing import AsyncIterator, Iterator, Optional
 
 import sqlalchemy

examples/python/src/booktest/models.py

@@ -1,4 +1,6 @@
 # Code generated by sqlc. DO NOT EDIT.
+# versions:
+#   sqlc v1.12.0
 import dataclasses
 import datetime
 import enum

examples/python/src/booktest/query.py

@@ -1,4 +1,7 @@
 # Code generated by sqlc. DO NOT EDIT.
+# versions:
+#   sqlc v1.12.0
+# source: query.sql
 import dataclasses
 import datetime
 from typing import AsyncIterator, List, Optional

examples/python/src/jets/models.py

@@ -1,4 +1,6 @@
 # Code generated by sqlc. DO NOT EDIT.
+# versions:
+#   sqlc v1.12.0
 import dataclasses
 
 

examples/python/src/jets/query-building.py

@@ -1,4 +1,7 @@
 # Code generated by sqlc. DO NOT EDIT.
+# versions:
+#   sqlc v1.12.0
+# source: query-building.sql
 from typing import AsyncIterator, Optional
 
 import sqlalchemy

examples/python/src/ondeck/city.py

@@ -1,4 +1,7 @@
 # Code generated by sqlc. DO NOT EDIT.
+# versions:
+#   sqlc v1.12.0
+# source: city.sql
 from typing import AsyncIterator, Optional
 
 import sqlalchemy

examples/python/src/ondeck/models.py

@@ -1,4 +1,6 @@
 # Code generated by sqlc. DO NOT EDIT.
+# versions:
+#   sqlc v1.12.0
 import dataclasses
 import datetime
 import enum

examples/python/src/ondeck/venue.py

@@ -1,4 +1,7 @@
 # Code generated by sqlc. DO NOT EDIT.
+# versions:
+#   sqlc v1.12.0
+# source: venue.sql
 import dataclasses
 from typing import AsyncIterator, List, Optional
 

internal/codegen/python/gen.go

@@ -10,6 +10,7 @@ import (
 
 	"github.com/kyleconroy/sqlc/internal/codegen/sdk"
 	"github.com/kyleconroy/sqlc/internal/inflection"
+	"github.com/kyleconroy/sqlc/internal/info"
 	"github.com/kyleconroy/sqlc/internal/metadata"
 	"github.com/kyleconroy/sqlc/internal/plugin"
 	pyast "github.com/kyleconroy/sqlc/internal/python/ast"
@@ -481,6 +482,30 @@ func buildQueries(req *plugin.CodeGenRequest, structs []Struct) ([]Query, error)
 	return qs, nil
 }
 
+func moduleNode(source string) *pyast.Module {
+	mod := &pyast.Module{
+		Body: []*pyast.Node{
+			poet.Comment(
+				"Code generated by sqlc. DO NOT EDIT.",
+			),
+			poet.Comment(
+				"versions:",
+			),
+			poet.Comment(
+				"  sqlc " + info.Version,
+			),
+		},
+	}
+	if source != "" {
+		mod.Body = append(mod.Body,
+			poet.Comment(
+				"source: "+source,
+			),
+		)
+	}
+	return mod
+}
+
 func importNode(name string) *pyast.Node {
 	return &pyast.Node{
 		Node: &pyast.Node_Import{
@@ -636,18 +661,7 @@ func buildImportGroup(specs map[string]importSpec) *pyast.Node {
 }
 
 func buildModelsTree(ctx *pyTmplCtx, i *importer) *pyast.Node {
-	mod := &pyast.Module{
-		Body: []*pyast.Node{
-			{
-				Node: &pyast.Node_Comment{
-					Comment: &pyast.Comment{
-						Text: "Code generated by sqlc. DO NOT EDIT.",
-					},
-				},
-			},
-		},
-	}
-
+	mod := moduleNode("")
 	std, pkg := i.modelImportSpecs()
 	mod.Body = append(mod.Body, buildImportGroup(std), buildImportGroup(pkg))
 
@@ -779,14 +793,7 @@ func asyncQuerierClassDef() *pyast.ClassDef {
 }
 
 func buildQueryTree(ctx *pyTmplCtx, i *importer, source string) *pyast.Node {
-	mod := &pyast.Module{
-		Body: []*pyast.Node{
-			poet.Comment(
-				"Code generated by sqlc. DO NOT EDIT.",
-			),
-		},
-	}
-
+	mod := moduleNode(source)
 	std, pkg := i.queryImportSpecs(source)
 	mod.Body = append(mod.Body, buildImportGroup(std), buildImportGroup(pkg))
 	mod.Body = append(mod.Body, &pyast.Node{