fix: from as file and to as dir

Close #1245

packages/electron-builder/src/fileMatcher.ts

@@ -93,6 +93,12 @@ export function copyFiles(patterns: Array<FileMatcher> | null): Promise<any> {
     }
 
     if (fromStat.isFile()) {
+      const toStat = await statOrNull(pattern.to)
+      // https://github.com/electron-userland/electron-builder/issues/1245
+      if (toStat != null && toStat.isDirectory()) {
+        return await copyFile(pattern.from, path.join(pattern.to, path.basename(pattern.from)), fromStat)
+      }
+
       await mkdirs(path.dirname(pattern.to))
       return await copyFile(pattern.from, pattern.to, fromStat)
     }

test/src/filesTest.ts

@@ -35,20 +35,28 @@ test.ifDevOrLinuxCi("map resources", app({
   targets: Platform.LINUX.createTarget(DIR_TARGET),
   config: {
     asar: false,
-    extraResources: {
-      from: "foo/old",
-      to: "foo/new",
-    },
+    extraResources: [
+      {
+        from: "foo/old",
+        to: "foo/new",
+      },
+      {
+        from: "license.txt",
+        to: ".",
+      },
+    ],
   }
 }, {
   projectDirCreated: projectDir => BluebirdPromise.all([
     outputFile(path.join(projectDir, "foo", "old"), "data"),
+    outputFile(path.join(projectDir, "license.txt"), "data"),
   ]),
   packed: context => {
     const resources = path.join(context.getResources(Platform.LINUX))
     return BluebirdPromise.all([
       assertThat(path.join(resources, "app", "foo", "old")).doesNotExist(),
       assertThat(path.join(resources, "foo", "new")).isFile(),
+      assertThat(path.join(resources, "license.txt")).isFile(),
     ])
   },
 }))

yarn.lock

@@ -1272,8 +1272,8 @@ glob@~5.0.0:
     path-is-absolute "^1.0.0"
 
 globals@^9.0.0:
-  version "9.14.0"
-  resolved "https://registry.yarnpkg.com/globals/-/globals-9.14.0.tgz#8859936af0038741263053b39d0e76ca241e4034"
+  version "9.15.0"
+  resolved "https://registry.yarnpkg.com/globals/-/globals-9.15.0.tgz#7a5d8fd865e69de910b090b15a87772f9423c5de"
 
 got@^5.0.0:
   version "5.7.1"