fix #2618 - dub run with targetType none fails with assert error instead of proper error message

source/dub/compilers/dmd.d

@@ -305,7 +305,13 @@ config    /etc/dmd.conf
 	string getTargetFileName(in BuildSettings settings, in BuildPlatform platform)
 	const {
 		import std.conv: text;
-		assert(settings.targetName.length > 0, "No target name set.");
+
+		string targetName()
+		{
+			assert(settings.targetName.length > 0, "No target name set.");
+			return settings.targetName.idup;
+		}
+
 		final switch (settings.targetType) {
 			case TargetType.autodetect:
 				assert(false,
@@ -315,23 +321,23 @@ config    /etc/dmd.conf
 			case TargetType.sourceLibrary: return null;
 			case TargetType.executable:
 				if (platform.isWindows())
-					return settings.targetName ~ ".exe";
-				else return settings.targetName.idup;
+					return targetName ~ ".exe";
+				else return targetName;
 			case TargetType.library:
 			case TargetType.staticLibrary:
 				if (platform.isWindows())
-					return settings.targetName ~ ".lib";
-				else return "lib" ~ settings.targetName ~ ".a";
+					return targetName ~ ".lib";
+				else return "lib" ~ targetName ~ ".a";
 			case TargetType.dynamicLibrary:
 				if (platform.isWindows())
-					return settings.targetName ~ ".dll";
+					return targetName ~ ".dll";
 				else if (platform.platform.canFind("darwin"))
-					return "lib" ~ settings.targetName ~ ".dylib";
-				else return "lib" ~ settings.targetName ~ ".so";
+					return "lib" ~ targetName ~ ".dylib";
+				else return "lib" ~ targetName ~ ".so";
 			case TargetType.object:
 				if (platform.isWindows())
-					return settings.targetName ~ ".obj";
-				else return settings.targetName ~ ".o";
+					return targetName ~ ".obj";
+				else return targetName ~ ".o";
 		}
 	}
 

source/dub/compilers/gdc.d

@@ -160,28 +160,38 @@ class GDCCompiler : Compiler {
 
 	string getTargetFileName(in BuildSettings settings, in BuildPlatform platform)
 	const {
-		assert(settings.targetName.length > 0, "No target name set.");
+		import std.conv: text;
+
+		string targetName()
+		{
+			assert(settings.targetName.length > 0, "No target name set.");
+			return settings.targetName.idup;
+		}
+
 		final switch (settings.targetType) {
-			case TargetType.autodetect: assert(false, "Configurations must have a concrete target type.");
+			case TargetType.autodetect:
+				assert(false,
+					   text("Configurations must have a concrete target type, ", settings.targetName,
+							" has ", settings.targetType));
 			case TargetType.none: return null;
 			case TargetType.sourceLibrary: return null;
 			case TargetType.executable:
 				if (platform.isWindows())
-					return settings.targetName ~ ".exe";
-				else return settings.targetName.idup;
+					return targetName ~ ".exe";
+				else return targetName;
 			case TargetType.library:
 			case TargetType.staticLibrary:
-				return "lib" ~ settings.targetName ~ ".a";
+				return "lib" ~ targetName ~ ".a";
 			case TargetType.dynamicLibrary:
 				if (platform.isWindows())
-					return settings.targetName ~ ".dll";
+					return targetName ~ ".dll";
 				else if (platform.platform.canFind("darwin"))
-					return "lib" ~ settings.targetName ~ ".dylib";
-				else return "lib" ~ settings.targetName ~ ".so";
+					return "lib" ~ targetName ~ ".dylib";
+				else return "lib" ~ targetName ~ ".so";
 			case TargetType.object:
 				if (platform.isWindows())
-					return settings.targetName ~ ".obj";
-				else return settings.targetName ~ ".o";
+					return targetName ~ ".obj";
+				else return targetName ~ ".o";
 		}
 	}
 

source/dub/compilers/ldc.d

@@ -192,34 +192,43 @@ config    /etc/ldc2.conf (x86_64-pc-linux-gnu)
 
 	string getTargetFileName(in BuildSettings settings, in BuildPlatform platform)
 	const {
-		assert(settings.targetName.length > 0, "No target name set.");
+		import std.conv: text;
+
+		string targetName()
+		{
+			assert(settings.targetName.length > 0, "No target name set.");
+			return settings.targetName.idup;
+		}
 
 		const p = platform.platform;
 		final switch (settings.targetType) {
-			case TargetType.autodetect: assert(false, "Configurations must have a concrete target type.");
+			case TargetType.autodetect:
+				assert(false,
+					   text("Configurations must have a concrete target type, ", settings.targetName,
+							" has ", settings.targetType));
 			case TargetType.none: return null;
 			case TargetType.sourceLibrary: return null;
 			case TargetType.executable:
 				if (p.canFind("windows"))
-					return settings.targetName ~ ".exe";
+					return targetName ~ ".exe";
 				else if (p.canFind("wasm"))
-					return settings.targetName ~ ".wasm";
-				else return settings.targetName.idup;
+					return targetName ~ ".wasm";
+				else return targetName;
 			case TargetType.library:
 			case TargetType.staticLibrary:
 				if (p.canFind("windows") && !p.canFind("mingw"))
-					return settings.targetName ~ ".lib";
-				else return "lib" ~ settings.targetName ~ ".a";
+					return targetName ~ ".lib";
+				else return "lib" ~ targetName ~ ".a";
 			case TargetType.dynamicLibrary:
 				if (p.canFind("windows"))
-					return settings.targetName ~ ".dll";
+					return targetName ~ ".dll";
 				else if (p.canFind("darwin"))
-					return "lib" ~ settings.targetName ~ ".dylib";
-				else return "lib" ~ settings.targetName ~ ".so";
+					return "lib" ~ targetName ~ ".dylib";
+				else return "lib" ~ targetName ~ ".so";
 			case TargetType.object:
 				if (p.canFind("windows"))
-					return settings.targetName ~ ".obj";
-				else return settings.targetName ~ ".o";
+					return targetName ~ ".obj";
+				else return targetName ~ ".o";
 		}
 	}
 

source/dub/generators/build.d

@@ -708,7 +708,11 @@ private NativePath getMainSourceFile(in Package prj)
 
 private NativePath getTargetPath(const scope ref BuildSettings bs, const scope ref GeneratorSettings settings)
 {
-	return NativePath(bs.targetPath) ~ settings.compiler.getTargetFileName(bs, settings.platform);
+	auto targetFileName = settings.compiler.getTargetFileName(bs, settings.platform);
+
+	if (!targetFileName.length)
+		return NativePath.init;
+	return NativePath(bs.targetPath) ~ targetFileName;
 }
 
 private string shrinkPath(NativePath path, NativePath base)

test/issue2618-targetType-none-run.sh

@@ -0,0 +1,9 @@
+#!/usr/bin/env bash
+
+. $(dirname "${BASH_SOURCE[0]}")/common.sh
+
+cd "${CURR_DIR}/issue2618-targetType-none-run"
+
+set +o pipefail
+
+$DUB run --config dependencies --force 2>&1 | grep -c -F "Target is a library. Skipping execution."

test/issue2618-targetType-none-run/b/.gitignore

@@ -0,0 +1,16 @@
+.dub
+docs.json
+__dummy.html
+docs/
+/projb
+projb.so
+projb.dylib
+projb.dll
+projb.a
+projb.lib
+projb-test-*
+*.exe
+*.pdb
+*.o
+*.obj
+*.lst

test/issue2618-targetType-none-run/b/dub.json

@@ -0,0 +1,3 @@
+{
+	"name": "b"
+}

test/issue2618-targetType-none-run/b/source/projb.d

@@ -0,0 +1,8 @@
+module projb;
+import std.stdio;
+
+int getDependency()
+{
+	writeln("Edit source/app.d to start your project.");
+	return 10;
+}

test/issue2618-targetType-none-run/dub.json

@@ -0,0 +1,16 @@
+{
+	"dependencies": {
+		"b": {"path": "b"}
+	},
+	"configurations": [
+		{
+			"name": "main",
+			"targetType": "staticLibrary"
+		},
+		{
+			"name": "dependencies",
+			"targetType":"none"
+		}
+	],
+	"name": "issue2618"
+}

test/issue2618-targetType-none-run/source/app.d

@@ -0,0 +1,6 @@
+import std.stdio;
+
+void main()
+{
+	writeln("Edit source/app.d to start your project.");
+}