allow globbing, and extract queries from .go files

generate/testdata/queries/SimpleInput.graphql.go

@@ -0,0 +1,40 @@
+package test
+
+// Code generated by github.com/Khan/genqlient, DO NOT EDIT.
+
+import (
+	"github.com/Khan/genqlient/graphql"
+)
+
+type SimpleInputQueryResponse struct {
+	User SimpleInputQueryUser `json:"user"`
+}
+
+type SimpleInputQueryUser struct {
+	Id string `json:"id"`
+}
+
+func SimpleInputQuery(
+	client graphql.Client,
+	name string,
+) (*SimpleInputQueryResponse, error) {
+	variables := map[string]interface{}{
+		"name": name,
+	}
+
+	var retval SimpleInputQueryResponse
+	err := client.MakeRequest(
+		nil,
+		"SimpleInputQuery",
+		`
+query SimpleInputQuery ($name: String!) {
+	user(query: {name:$name}) {
+		id
+	}
+}
+`,
+		&retval,
+		variables,
+	)
+	return &retval, err
+}