In case anyone else stumble upon the same problem, the solution for me was to cd to the Sources folder of my scripts, not the root folder.

I had this error happen to me when I was building a CLI tool on XCode. First off, when Xcode talks about root manifest, it means package.swift. You don't have one in your directory or parent directories. I discovered 2 options:

Instead of swift build, use Xcode's UI or xcodebuild CLI and get the build files in finder/ terminal

• For debug, build the build normally, and you can right click the file generated in the Project Navigator like below:

• For release build, run Archive in Xcode instead and you can get the build files: Project Name 25-03-2021, 11.30.xcarchive/Products/usr/local/bin/executable in my case the executable is called Image Labeling

or, add a package.swift

Instead of creating the project through Xcode (CLI tool template) use the swift cli tool instead: swift package init --type executable . In this case, swift build works everywhere in the project, not just in Sources because package.swift was added to the root of the project.

When you use from

-Swift build

command you must use from Swift Package Manager and you should have 2 folder on the directory :

SourceTest

you should use the below command for project:

 - name: Build      run: |          xcodebuild clean test -project "yourproject.xcproject" -scheme "yourproject" -destination "platform=iOS Simulator,name=iPhone 12 Pro,OS=latest" CODE_SIGN_IDENTITY="" CODE_SIGNING_REQUIRED=NO ONLY_ACTIVE_ARCH=NO

and you should use the below command for workspcae:

- name: Build     run: |           xcodebuild clean build -workspace "yourproject.xcworkspace" -scheme "yourtarget" -destination "platform=iOS Simulator,name=iPhone 12 Pro,OS=latest" CODE_SIGN_IDENTITY="" CODE_SIGNING_REQUIRED=NO ONLY_ACTIVE_ARCH=NO     - name: Test     run: |           xcodebuild clean test -workspace "yourproject.xcworkspace" -scheme "yourtargetTests" -destination "platform=iOS Simulator,name=iPhone 12 Pro,OS=latest" CODE_SIGN_IDENTITY="" CODE_SIGNING_REQUIRED=NO ONLY_ACTIVE_ARCH=NO