What happened?

I'm trying to set a project which is a framework that has its own module map file. The example I'm working with can be found at gitlab.com/gabriellievano/earlgrey-tuist (the module map-file-issue branch shows the issue. main has a workaround).

Here's the target spec:

        .target(
            name: "AppFramework",
            destinations: .iOS,
            product: .framework,
            bundleId: "com.google.earlgrey.CommonLib",
            infoPlist: .file(path: .relativeToRoot("Vendor/EarlGrey/EarlGrey/AppFramework/Info.plist")),
            sources: [
                "EarlGrey/AppFramework/**/*.m",
                "EarlGrey/third_party/**/*.c",
            ],
            headers: .headers(
                public: [
                    "EarlGrey/CommonLib/GREYConstants.h",
                    "EarlGrey/CommonLib/Error/GREYError.h",
                    "EarlGrey/CommonLib/Error/GREYErrorConstants.h",
                ],
                project: [
                    "EarlGrey/AppFramework/**/*.h",
                    "EarlGrey/third_party/fishhook/fishhook.h",
                ]
            ),
            scripts: [
                .post(
                    script: "sh EarlGrey/Scripts/build_universal_framework.sh",
                    name: "Run script",
                    runForInstallBuildsOnly: true
                ),
            ],
            dependencies: [
                .project(target: "ChannelLib", path: .relativeToRoot("Vendor/EarlGrey/eDistantObject")),
                .project(target: "DeviceLib", path: .relativeToRoot("Vendor/EarlGrey/eDistantObject")),
                .project(target: "MeasureLib", path: .relativeToRoot("Vendor/EarlGrey/eDistantObject")),
                .target(name: "CommonLib"),
                .target(name: "UILib"),
                .sdk(name: "IOKit", type: .framework, status: .required),
            ],
            settings: .settings(
                base: .targetBase()
                    .currentProjectVersion("1")
                    .definesModule(true)
                    .dylibCompatibilityVersion("1")
                    .dylibCurrentVersion("1")
                    .dylibInstallNameBase("@rpath")
                    .headerSearchPaths([
                                           "EarlGrey/Submodules/eDistantObject/**",
                                           "EarlGrey/Submodules/fishhook/",
                                           "EarlGrey/",
                                           "EarlGrey/TestLib/**",
                                       ])
                    .moduleMapFile("$(PROJECT_DIR)/EarlGrey/AppFramework/AppFramework.modulemap")
                    .otherLinkerFlags(["-ObjC"])
                    .productNameIsTargetName()
                    .merging([
                                 "VERSIONING_SYSTEM": "apple-generic",
                                 "VERSION_INFO_PREFIX": "",
                             ])
            )
        ),

In this example, moduleMapFile(_ path) will merge the MODULEMAP_FILE setting. i.e.:

    public func moduleMapFile(_ path: String) -> SettingsDictionary {
        return merging([
                    "MODULEMAP_FILE": .string(path),
                ])
    }

Despite this, when generating the project, MODULEMAP_FILE will be empty for the AppFramework target, and both OTHER_CFLAGS and OTHER_CPLUSPLUSFLAGS remain unchanged from the set value (which in this case it's inherited from the project settings, -fobjc-arc -fobjc-arc-exceptions).

Either MODULEMAP_FILE or the -fmodule_map_file flag should be set to allow custom module maps.

How do we reproduce it?

1. git clone -b modulemap-file-issue https://gitlab.com/gabriellievano/earlgrey-tuist
2. git submodule update --init
3. cd Vendor/EarlGrey/EarlGrey
4. sh Scripts/download_deps.sh
5. cd ../../..
6. mise install tuist
7. mise x -- tuist install
8. mise x -- tuist generate

Open Xcode project and view build settings for AppFramework (in Vendor/EarlGrey project). There will be no module map path assigned to either MODULEMAP_FILE nor -fmodule_map_file flag.

Error log

There's no error

macOS version

14.5

Tuist version

Verified in 4.5.1 and 4.23.0

Xcode version

15.4