fix: file path import issues

fixtures/global/a.graphql

@@ -0,0 +1,6 @@
+# import * from "shared"
+
+type A {
+  first: String
+  second: Shared
+}

src/index.test.ts

@@ -572,6 +572,25 @@ input PostFilter {
   t.is(actualSDL, expectedSDL)
 })
 
+test('global schema modules', t => {
+  const shared = `
+    type Shared {
+      first: String
+    }
+  `
+  const expectedSDL = `\
+type A {
+  first: String
+  second: Shared
+}
+
+type Shared {
+  first: String
+}
+`
+  t.is(importSchema('fixtures/global/a.graphql', { shared }), expectedSDL)
+})
+
 test('missing type on type', t => {
   const err = t.throws(() => importSchema('fixtures/type-not-found/a.graphql'), Error)
   t.is(err.message, `Field test: Couldn't find type Post in any of the schemas.`)

src/index.ts

@@ -197,7 +197,9 @@ function collectDefinitions(
   // Process each file (recursively)
   rawModules.forEach(m => {
     // If it was not yet processed (in case of circular dependencies)
-    const moduleFilePath = isFile(filePath) ? path.resolve(path.join(dirname, m.from)) : m.from
+    const moduleFilePath = isFile(filePath) && isFile(m.from)
+      ? path.resolve(path.join(dirname, m.from))
+      : m.from
     if (!processedFiles.has(moduleFilePath)) {
       collectDefinitions(
         m.imports,