"swift package resolve" creates a .exe in a temp folder

[alexanderjung-sdxag]

Description I am new to swift and got stuck with the example https://www.swift.org/getting-started/cli-swiftpm/ under Windows 11.

swift build - and I have narrowed it down to swift package restore - results in the following error message:

c:\Swift\MyCLI>swift package restore
error: 'mycli': Error Domain=NSCocoaErrorDomain Code=257 "You don’t have permission."

I could not find out, for which file or directory the permissions are missing.

Steps to reproduce I just followed the steps described in: https://www.swift.org/getting-started/ https://www.swift.org/install/windows/#installation-via-windows-package-manager https://www.swift.org/getting-started/cli-swiftpm/

Expected behavior swift build without error.

Environment

Swift version 5.9.1 (swift-5.9.1-RELEASE)
Target: x86_64-unknown-windows-msvc

Microsoft Windows [Version 10.0.22000.2600]

Visual Studio 2022 Developer Command Prompt v17.8.0 - x64

Any help solving the issue - or at least tracking down the root cause - would be appreciated!

Additional info Same issue in VS Code. swiftc Sources\main.swift -o MyCLI.exe works.

[neonichu]

Not sure what swift package restore is? Did you maybe mean swift package resolve? I don't have access to a Windows machine but at least in the toolchain we ship on macOS, there is no such thing as swift package restore.

[alexanderjung-sdxag]

swift package restore and swift package resolve seem to be doing the same, (At least the resulting error is.) I don't remember where I've gotten this from. (I'm going to change the title though.)

BTW: I also don't remember the option to pass to swift to get the detailed commands (i.e. swift package restore/resolve)...

Here's the output with --vv if that is any help:

c:\Swift\MyCLI>swift build --vv
debug: C:\Library\Developer\Toolchains\unknown-Asserts-development.xctoolchain\usr\bin\swiftc.exe -print-target-info
debug: C:\Library\Developer\Toolchains\unknown-Asserts-development.xctoolchain\usr\bin\swiftc.exe -print-target-info
debug: C:\Library\Developer\Toolchains\unknown-Asserts-development.xctoolchain\usr\bin\swiftc.exe -print-target-info
debug: C:\Library\Developer\Toolchains\unknown-Asserts-development.xctoolchain\usr\bin\swiftc.exe -print-target-info
debug: registering 'repository fetching' with terminator
debug: registering 'registry downloads' with terminator
debug: registering 'binary artifacts downloads' with terminator
debug: registering 'plugin runner' with terminator
debug: registering 'build system' with terminator
debug: 'mycli': evaluating manifest for 'mycli' v. unknown
debug: C:\Library\Developer\Toolchains\unknown-Asserts-development.xctoolchain\usr\bin\swiftc.exe -L C:\Library\Developer\Toolchains\unknown-Asserts-development.xctoolchain\usr\lib\swift\pm\ManifestAPI -lPackageDescription -sdk C:\Library\Developer\Platforms\Windows.platform\Developer\SDKs\Windows.sdk -libc MD -I C:\Library\Developer\Platforms\Windows.platform\Developer\Library\XCTest-development\usr\lib\swift\windows -I C:\Library\Developer\Platforms\Windows.platform\Developer\Library\XCTest-development\usr\lib\swift\windows\x86_64 -L C:\Library\Developer\Platforms\Windows.platform\Developer\Library\XCTest-development\usr\lib\swift\windows\x86_64 -use-ld=lld -swift-version 5 -I C:\Library\Developer\Toolchains\unknown-Asserts-development.xctoolchain\usr\lib\swift\pm\ManifestAPI -package-description-version 5.9.0 C:\Users\JungAl\AppData\Local\Temp\TemporaryDirectory.UNDgPt\manifest.swift -Xfrontend -disable-implicit-concurrency-module-import -Xfrontend -disable-implicit-string-processing-module-import -v -o C:\Users\JungAl\AppData\Local\Temp\TemporaryDirectory.o1Ia3x\mycli-manifest.exe
debug: C:\Users\JungAl\AppData\Local\Temp\TemporaryDirectory.o1Ia3x\mycli-manifest.exe -handle 370 -context "{""packageDirectory"":""C:\\Users\\JungAl\\AppData\\Local\\Temp\\TemporaryDirectory.UNDgPt""}"
error: 'mycli': Error Domain=NSCocoaErrorDomain Code=257 "You don’t have permission."

[neonichu]

Looks like this is an issue in manifest loading, not sure where mycli comes from or what it is supposed to be, it looks like we're trying to execute mycli-manifest.exe and maybe that gets cut off somewhere and we're trying to execute something that doesn't exist instead?

[alexanderjung-sdxag]

mycli is just a minimalist hello world application, created as per these instructions: https://www.swift.org/getting-started/cli-swiftpm/ And I can only guess what swift.exe is doing here - that is the reason I am stuck.

To be clear: This is the "You are new to swift? Try this simple hello-word-application to get you started"-example from the official swift documentation. And it does not work as advertised.

[alexanderjung-sdxag]

I'm one step further: ist seems that the toolchain creates an .exe in the temp folder and tries to access it. This is denied by Microsoft Defender (and IMHO rightly so). I would consider this a bug....

[alexanderjung-sdxag]

I have just renamed the issue to: "swift package resolve" creates a .exe in a temp folder

Rationale: Placing executables in temporary folders is a typical behavior of malware. For this reason accessing executables in temporary folders is prevented by Microsoft Defender in many companies.

My suggestion would be that the swift toolchain uses a local build folder (usually ./obj in other systems) for its temporary output.