Fix issue #2086: Copy files of sub packages to the target path.

source/dub/generators/generator.d

@@ -120,7 +120,10 @@ class ProjectGenerator
 			buildsettings.processVars(m_project, pack, pack.getBuildSettings(settings.platform, configs[pack.name]), settings, true);
 			bool generate_binary = !(buildsettings.options & BuildOption.syntaxOnly);
 			auto bs = &targets[m_project.rootPackage.name].buildSettings;
-			auto targetPath = (m_tempTargetExecutablePath.empty) ? NativePath(bs.targetPath) : m_tempTargetExecutablePath;
+			auto targetPath = !m_tempTargetExecutablePath.empty ? m_tempTargetExecutablePath :
+							  !bs.targetPath.empty ? NativePath(bs.targetPath) :
+							  NativePath(buildsettings.targetPath);
+
 			finalizeGeneration(pack, m_project, settings, buildsettings, targetPath, generate_binary);
 		}
 

test/issue2086-copyfiles-subpackage-targetpath.sh

@@ -0,0 +1,9 @@
+#!/usr/bin/env bash
+
+. $(dirname "${BASH_SOURCE[0]}")/common.sh
+cd "${CURR_DIR}/issue2086-copyfiles-subpackage-targetpath" || die "Could not cd."
+
+rm -f "sub/to_be_deployed.txt"
+
+"$DUB" build
+./sub/sub

test/issue2086-copyfiles-subpackage-targetpath/dub.json

@@ -0,0 +1,10 @@
+{
+    "name": "root",
+    "targetType": "none",
+    "dependencies": {
+        "root:sub": "*"
+    },
+    "subPackages": [
+        "sub"
+    ]
+}

test/issue2086-copyfiles-subpackage-targetpath/sub/dub.json

@@ -0,0 +1,8 @@
+{
+    "name": "sub",
+    "targetType": "executable",
+    "targetName": "sub",
+    "copyFiles": [
+        "files/*"
+    ]
+}

test/issue2086-copyfiles-subpackage-targetpath/sub/source/app.d

@@ -0,0 +1,9 @@
+import std.exception: enforce;
+import std.file: exists, thisExePath;
+import std.path: dirName, buildPath;
+
+void main()
+{
+    string filePath = buildPath(thisExePath.dirName, "to_be_deployed.txt");
+    enforce(filePath.exists);
+}