Tulsi swift_test Demo

This project demonstrates issues that can hopefully be addressed in Tulsi:

• Missing swift_test support
• Invalid .tulsigen configuration file generation
• Missing source file paths in generated .tulsigen file

DemoProject.tulsiproj and DemoProject.tulsigen artifacts have been committed to the repository to provide a baseline state from which to observe the file generation-related issues.

This project was created to add context to the bazelbuild/tulsi Issue opened here.

---

Setup

The Makefile contains a few commands to build and test targets, and generate a Tulsi project.

Build

Execute the following to build both demo targets:

make build

Test

Execute the following to run demo target tests:

make test

Generate Project

Execute the following to generate a Tulsi project using the demo test target:

make tulsiproj

Open Project

Execute the following to open the generated Tulsi project:

make tulsiproj_open

---

Issues

Invalid Tulsi Config File

Using make tulsiproj, we observe that Tulsi produces an invalid .tulsigen configuration file for the given target. Here is the warning we receive:

Failed to read the given generator config: Config file at /tulsi-swift-test-demo/demo-target/DemoProject.tulsiproj/Configs/DemoProject.tulsigen is invalid: Invalid additional file path: //demo-target/BUILD

In order to fix this, we have to remove the // prefix from "//demo-target/BUILD" within additionalFilePaths: Before:

"additionalFilePaths" : [
  "//demo-target/BUILD"
],

After:

"additionalFilePaths" : [
  "demo-target/BUILD"
],

Note: Repeated invocations of make tulsiproj reset this fix.

Missing Source in Tulsi Project

Using make tulsiproj, we observe that Tulsi produces a .tulsigen configuration file that is missing paths to target source files:

"sourceFilters" : [
  "./..."
]

In order to fix this, we have to manually add paths to source file directories:

"sourceFilters" : [
  "demo-target",
  "demo-target/Sources",
  "demo-target/Tests"
]

Note: Repeated invocations of make tulsiproj reset this fix.

Missing swift_test support

Although Tulsi appears to handle swift_library targets correctly, it fails to generate a Tulsi project for swift_test targets. Here is the warning we receive after executing make tulsiproj_open:

[Error] Generate[FAIL]: 10.6267s Unsupported target type: swift_test (target //demo-target:DemoTargetTests)
Xcode project generation failed

In order to fix this temporarily, we have to define new swift_library and macos_unit_test libraries for this test target:

load("@build_bazel_rules_swift//swift:swift.bzl", "swift_library")
load("@build_bazel_rules_apple//apple:macos.bzl", "macos_unit_test")

swift_library(
    name = "DemoTargetTestsLibrary",
    srcs = glob(["Tests/*.swift"]),
    deps = [":DemoTarget"]
    module_name = "DemoTargetTestsLibrary",
    visibility = ["//visibility:private"],
)

macos_unit_test(
    name = "DemoTargetTests",
    deps = [":DemoTargetTestsLibrary"],
    minimum_os_version = "10.15",
    visibility = ["//visibility:public"]
)