Fix importing json as a module (close #601)

server/build.go

@@ -4,6 +4,7 @@ import (
 	"bytes"
 	"errors"
 	"fmt"
+	"io/ioutil"
 	"net/url"
 	"os"
 	"path"
@@ -268,6 +269,13 @@ rebuild:
 							}
 						}
 
+						if strings.HasSuffix(args.Path, ".json") {
+							jsonFile := filepath.Join(args.ResolveDir, args.Path)
+							if fileExists(jsonFile) {
+								return api.OnResolveResult{Path: args.Path, Namespace: "json", PluginData: jsonFile}, nil
+							}
+						}
+
 						for _, name := range nativeNodePackages {
 							if args.Path == name || strings.HasPrefix(args.Path, name+"/") {
 								if task.Target == "deno" || task.Target == "denonext" {
@@ -484,6 +492,27 @@ rebuild:
 					},
 				)
 
+				// import info from "./packge.json"
+				build.OnLoad(
+					api.OnLoadOptions{Filter: ".*", Namespace: "json"},
+					func(args api.OnLoadArgs) (ret api.OnLoadResult, err error) {
+						jsonFile, ok := args.PluginData.(string)
+						if !ok {
+							return api.OnLoadResult{}, errors.New("plugin data is not a string")
+						}
+						data, err := ioutil.ReadFile(jsonFile)
+						if err != nil {
+							return api.OnLoadResult{}, err
+						}
+						prefix := []byte("export default ")
+						code := make([]byte, len(prefix)+len(data))
+						copy(code, prefix)
+						copy(code[len(prefix):], data)
+						contents := string(code)
+						return api.OnLoadResult{Contents: &contents, Loader: api.LoaderJS}, nil
+					},
+				)
+
 				// for browser exclude
 				build.OnLoad(
 					api.OnLoadOptions{Filter: ".*", Namespace: "browser-exclude"},

test/issue-601/issue-601.test.ts

@@ -0,0 +1,7 @@
+import { assertEquals } from "https://deno.land/[email protected]/testing/asserts.ts";
+
+import {} from "http://localhost:8080/@aws-sdk/[email protected]?dev";
+
+Deno.test("issue #601", async () => {
+  assertEquals(typeof Location, "function");
+});