'Build input file cannot be found' Swift 4.2, Xcode 10.0

I am getting the following error when building in Xcode 10.0 with swift 4.2:

[![This is the error][1]][1]


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Moving the folders around the inspector can cause the error "Build input file cannot be found"

**SWIFT 5**

In Swift 5, the error came up but the identity showed no errors.

- Go under build settings and select packaging.
- Delete the current paths for Debug and Release and enter your new path where the info.plist is kept.

For example [APPROJECTNAME]/[THEINFOPLISTFOLDER]/info.plist
In the screenshot below, the path is API-client/Resources/info.plist

[![enter image description here][1]][1]


**SWIFT 4**

To fix it, go to the general tab and under identity reselect the info.plist that you like

[![enter image description here][2]][2]


[![enter image description here][3]][3]


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I got this error when I put the Info.plist file inside a folder. Then when I extracted the file to public view, the error went away.

My issue was a missing SettingsController file.

I copied a file from projectA to projectB but forgot to tick `Copy items if needed`. Unbeknownst to me a couple of weeks later when I deleted projectA the SettingsController file in projectB got deleted along with it. Afterwards in projectB the error `Build input file cannot be found ... path/Folder/toSomeFile` was shown.

To fix it I closed Xcode, went to the main folder that it was in, opened the folder and right clicked on the **blue** Xcode icon with the extension `.xcodeproj`, then I choose `Show Package Contents`

[![enter image description here][1]][1]

From there I double clicked on the `project.pbxproj` icon

[![enter image description here][2]][2]

Once the `project.pbxproj` file was opened I pressed **command+f** and in the search field I entered the path part of the error `path/Folder/toSomeFile`

It took me to 1-2 lines of code that looked like this

[![enter image description here][3]][3]

Once I deleted those 1-2 lines, when I went back to the projectB and opened it the error was gone.

Just for a little more clarity the exact path of the error was `whogotgame_42/whogotgame/Controllers/SettingsController.swift`. So that is what I exactly entered in the `project.pbxproj` search field to get to those 1-2 lines that you see in the picture.


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# Update for Projects w/ Swift Packages

## How did the errors happen?

I ran into this issue when I had imported Swift Packages into my project but later cleaned `DerivedData` to fix an unrelated app caching issue. My existing project was not a local Swift Package but an iOS app project.

Note that we can still encounter the same issue in local Swift Package projects.

## What is the reason for the errors?

Swift Packages are checked out into `DerivedData` and are not referenced from the `ModuleCache.noindex` subfolder. Thus, cleaning the app's folder in `DerivedData` or `DerivedData` itself breaks dependency resolution within Xcode for Swift Packages.

This is a misleading build error since there may be nothing wrong with the app code you've written or your dependency resolution graph. The only thing required is to refresh the dependencies.

## How can I resolve the build errors?

Xcode now has nice options within the IDE itself to resolve Swift Packages. These options trigger a new checkout into `DerivedData`:

[![enter image description here][1]][1]

We can use three options, as shown in the image above depending on our use case:
1. <kbd>Reset Package Caches</kbd>: Trigger a re-install of your existing Package dependencies w/ same versions.
2. <kbd>Resolve Package Versions</kbd>: Use this option for updating Package checkouts when fixing Package Versions for cross-compatibility (in Project Settings).
3. <kbd>Update to Latest Package Versions</kbd>: Use this to update all Swift Package dependencies to the latest versions. This option may be a local breaking change if the API changes.

**NOTE**: Apple's documentation [recommends][2] to use Xcode for dependency resolution when working with Xcode projects excluding CLTs.

## Other solutions

1. We can also fix the error by restarting Xcode, but I find this step breaks my workflow and is tedious.
2. If we are running from the command line (local Swift Package executable), we can stick with a `swift build` variant without jumping to Xcode at all ([Source][3]). `swift build` doesn't work as easily out of the box in other projects, however.
3. Use `xcodebuild`:

xcodebuild -resolvePackageDependencies

I prefer staying in Xcode for simplicity but YMMV.


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You can use $(INFOSTRINGS_PATH)

It's Bundle file path. Specifies the file that contains the bundle’s localized strings file.

I got this issue after resolving the conflicts in project.pbxproj.

Step 1: Removing the "Build input files cannot be found" files from BuildPhases -> Copy Bundle resources and adding them back worked for me.

If the above Step 1 doesn't work, search for "Recovered References" folder in your project structure and remove the files that are causing this issue and repeat Step 1

In my case, it was due to localization.
Here's how to fix it.
[

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If all else fails:

1. In Xcode. Remove references of files in question from your project.
2. Open your project.pbxproj file as a file in Xcode. This is in <Your project>.xcodeproj
3. Delete all lines containing the name of said files. Save.
4. Back in Xcode. Re-add files to your project in Xcode.

**Adjust the file path according to that provided in the Xcode Error**