Add no-edit disclaimer to all generated files

- As discussed in #96

boilingcore/output.go

@@ -14,6 +14,12 @@ import (
 	"github.com/pkg/errors"
 )
 
+var noEditDisclaimer = []byte(`// This file is generated by SQLBoiler (https://github.com/vattle/sqlboiler)
+// and is meant to be re-generated in place and/or deleted at any time.
+// DO NOT EDIT
+
+`)
+
 var (
 	// templateByteBuffer is re-used by all template construction to avoid
 	// allocating more memory than is needed. This will later be a problem for
@@ -103,6 +109,7 @@ func executeTemplates(e executeTemplateData) error {
 		imps = combineTypeImports(imps, importsBasedOnType, e.data.Table.Columns)
 	}
 
+	writeFileDisclaimer(out)
 	writePackageName(out, e.state.Config.PkgName)
 	writeImports(out, imps)
 
@@ -138,6 +145,7 @@ func executeSingletonTemplates(e executeTemplateData) error {
 			thirdParty: e.importNamedSet[fName].thirdParty,
 		}
 
+		writeFileDisclaimer(out)
 		writePackageName(out, e.state.Config.PkgName)
 		writeImports(out, imps)
 
@@ -165,6 +173,7 @@ func generateTestMainOutput(state *State, data *templateData) error {
 	imps.standard = defaultTestMainImports[state.Config.DriverName].standard
 	imps.thirdParty = defaultTestMainImports[state.Config.DriverName].thirdParty
 
+	writeFileDisclaimer(out)
 	writePackageName(out, state.Config.PkgName)
 	writeImports(out, imps)
 
@@ -179,6 +188,12 @@ func generateTestMainOutput(state *State, data *templateData) error {
 	return nil
 }
 
+// writeFileDisclaimer writes the disclaimer at the top with a trailing
+// newline so the package name doesn't get attached to it.
+func writeFileDisclaimer(out *bytes.Buffer) {
+	_, _ = out.Write(noEditDisclaimer)
+}
+
 // writePackageName writes the package name correctly, ignores errors
 // since it's to the concrete buffer type which produces none
 func writePackageName(out *bytes.Buffer, pkgName string) {