Add the transformer "resolver" to remove API group imports for cross-…

…resource reference resolver modules

Signed-off-by: Alper Rifat Ulucinar <[email protected]>

cmd/resolver/main.go

@@ -0,0 +1,24 @@
+// SPDX-FileCopyrightText: 2023 The Crossplane Authors <https://crossplane.io>
+//
+// SPDX-License-Identifier: Apache-2.0
+
+package main
+
+import (
+	"os"
+	"path/filepath"
+
+	"gopkg.in/alecthomas/kingpin.v2"
+)
+
+func main() {
+	var (
+		app                     = kingpin.New(filepath.Base(os.Args[0]), "Transformer for the generated resolvers by the crossplane-tools so that cross API-group imports are removed.").DefaultEnvars()
+		apiGroupSuffix          = app.Flag("apiGroupSuffix", "Resource API group suffix, such as aws.upbound.io. The resource API group names are suffixed with this to get the canonical API group name.").Short('g').Required().String()
+		pattern                 = app.Flag("pattern", "List patterns for the packages to process, such as ./apis/...").Short('p').Default("./apis/...").Strings()
+		resolverFilePattern     = app.Flag("resolver", "Name of the generated resolver files to process.").Short('r').Default("zz_generated.resolvers.go").String()
+		ignorePackageLoadErrors = app.Flag("ignoreLoadErrors", "Ignore errors encountered while loading the packages.").Short('s').Bool()
+	)
+	kingpin.MustParse(app.Parse(os.Args[1:]))
+	kingpin.FatalIfError(transformPackages(*apiGroupSuffix, *resolverFilePattern, *ignorePackageLoadErrors, *pattern...), "Failed to transform the resolver files in the specified packages.")
+}