[dotnet] Add support for @(RuntimeEnvironmentVariable). by rolfbjarne · Pull Request #24824 · dotnet/macios

rolfbjarne · 2026-03-04T09:57:52Z

Add support for the '@(RuntimeEnvironmentVariable)' item group, which is set when using 'dotnet run' and passing environment variables using '-e|--environment NAME=VALUE' to 'dotnet run'.

This required adding the 'RuntimeEnvironmentVariableSupport' capability to tell 'dotnet run' that we support this.

References:

Add support for the '@(RuntimeEnvironmentVariable)' item group, which is set when using 'dotnet run' and passing environment variables using '-e|--environment NAME=VALUE' to 'dotnet run'. This required adding the 'RuntimeEnvironmentVariableSupport' capability to tell 'dotnet run' that we support this. References: * dotnet/android#10770 * dotnet/sdk#52664

Copilot

Pull request overview

Adds support for @(RuntimeEnvironmentVariable) (set by dotnet run -e|--environment NAME=VALUE) in the Apple .NET SDK targets so environment variables provided via dotnet run flow into the launched app (via mlaunch/open). This aligns Apple workloads with the behavior introduced in dotnet/android and dotnet/sdk.

Changes:

Add RuntimeEnvironmentVariableSupport project capability so dotnet run will provide @(RuntimeEnvironmentVariable).
Wire @(RuntimeEnvironmentVariable) into run/launch paths: mlaunch --setenv for mobile targets and open --env for desktop targets.
Extend test harness to pass dotnet run -e arguments and adjust the run test app/test accordingly.

Reviewed changes

Copilot reviewed 7 out of 7 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
tests/dotnet/UnitTests/ProjectTest.cs	Updates the `Run` test to attempt covering both legacy `RunEnvironment` and `dotnet run -e` flows.
tests/dotnet/MyRunApp/AppDelegate.cs	Adds an additional test case path to print environment variables to stdout.
tests/common/DotNet.cs	Adds support for passing `dotnet run -e NAME=VALUE` via an `environmentVariables` dictionary.
msbuild/Xamarin.MacDev.Tasks/Tasks/GetMlaunchArguments.cs	Updates env-var argument generation to support `Value` metadata items (for `@(RuntimeEnvironmentVariable)`).
dotnet/targets/Xamarin.Shared.Sdk.targets	Adds `RuntimeEnvironmentVariableSupport` capability.
dotnet/targets/Microsoft.Sdk.Mobile.targets	Includes `@(RuntimeEnvironmentVariable)` into `MlaunchEnvironmentVariables`.
dotnet/targets/Microsoft.Sdk.Desktop.targets	Appends `@(RuntimeEnvironmentVariable)` to `open` arguments via `--env`.

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tests/dotnet/UnitTests/ProjectTest.cs

dotnet/targets/Microsoft.Sdk.Desktop.targets

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

vs-mobiletools-engineering-service2 · 2026-03-04T15:20:18Z

✅ [CI Build #0e7614e] Build passed (Build packages) ✅

Pipeline on Agent
Hash: 0e7614ec93b6f5228d71c645c5b3a6b8b81f1c84 [PR build]

vs-mobiletools-engineering-service2 · 2026-03-04T15:25:57Z

✅ [PR Build #0e7614e] Build passed (Detect API changes) ✅

Pipeline on Agent
Hash: 0e7614ec93b6f5228d71c645c5b3a6b8b81f1c84 [PR build]

vs-mobiletools-engineering-service2 · 2026-03-04T15:47:37Z

✅ [CI Build #0e7614e] Build passed (Build macOS tests) ✅

Pipeline on Agent
Hash: 0e7614ec93b6f5228d71c645c5b3a6b8b81f1c84 [PR build]

vs-mobiletools-engineering-service2 · 2026-03-04T15:47:52Z

✅ API diff for current PR / commit

NET (empty diffs)

iOS: vsdrops gist ( No breaking changes )
tvOS: vsdrops gist ( No breaking changes )
MacCatalyst: vsdrops gist ( No breaking changes )
macOS: vsdrops gist ( No breaking changes )

✅ API diff vs stable

NET (empty diffs)

iOS: vsdrops gist ( No breaking changes )
tvOS: vsdrops gist ( No breaking changes )
MacCatalyst: vsdrops gist ( No breaking changes )
macOS: vsdrops gist ( No breaking changes )

ℹ️ Generator diff

Generator Diff: vsdrops (html) vsdrops (raw diff) gist (raw diff) - Please review changes)

Pipeline on Agent
Hash: 0e7614ec93b6f5228d71c645c5b3a6b8b81f1c84 [PR build]

vs-mobiletools-engineering-service2 · 2026-03-05T21:56:19Z

🔥 [CI Build #0e7614e] Test results 🔥

Test results

❌ Tests failed on VSTS: test results

0 tests crashed, 27 tests failed, 129 tests passed.

Failures

❌ monotouch tests (MacCatalyst) [attempt 3]

15 tests failed, 0 tests passed.

Failed tests

monotouch-test/Mac Catalyst/Debug: BuildFailure
monotouch-test/Mac Catalyst/Debug (ARM64): BuildFailure
monotouch-test/Mac Catalyst/Debug (managed static registrar): BuildFailure ( (failed to parse the logs: The Writer is closed or in error state.))
monotouch-test/Mac Catalyst/Debug (static registrar): BuildFailure
monotouch-test/Mac Catalyst/Debug (static registrar, ARM64): BuildFailure
monotouch-test/Mac Catalyst/Release (managed static registrar): BuildFailure
monotouch-test/Mac Catalyst/Release (managed static registrar, all optimizations): BuildFailure
monotouch-test/Mac Catalyst/Release (NativeAOT): BuildFailure
monotouch-test/Mac Catalyst/Release (NativeAOT, ARM64): BuildFailure
monotouch-test/Mac Catalyst/Release (NativeAOT, x64): BuildFailure
monotouch-test/Mac Catalyst/Release (static registrar): BuildFailure
monotouch-test/Mac Catalyst/Release (static registrar, all optimizations): BuildFailure
monotouch-test/Mac Catalyst/Release (ARM64, LLVM): BuildFailure
monotouch-test/Mac Catalyst/Debug (interpreter): BuildFailure
monotouch-test/Mac Catalyst/Release (interpreter): BuildFailure ( (failed to parse the logs: The Writer is closed or in error state.))

Html Report (VSDrops) Download

❌ monotouch tests (macOS) [attempt 3]

12 tests failed, 0 tests passed.

Failed tests

monotouch-test/macOS/Debug: BuildFailure
monotouch-test/macOS/Debug (ARM64): BuildFailure ( (failed to parse the logs: The Writer is closed or in error state.))
monotouch-test/macOS/Debug (managed static registrar): BuildFailure
monotouch-test/macOS/Debug (static registrar): BuildFailure
monotouch-test/macOS/Debug (static registrar, ARM64): BuildFailure
monotouch-test/macOS/Release (managed static registrar): BuildFailure
monotouch-test/macOS/Release (managed static registrar, all optimizations): BuildFailure
monotouch-test/macOS/Release (NativeAOT): BuildFailure
monotouch-test/macOS/Release (NativeAOT, ARM64): BuildFailure
monotouch-test/macOS/Release (NativeAOT, x64): BuildFailure ( (failed to parse the logs: The Writer is closed or in error state.))
monotouch-test/macOS/Release (static registrar): BuildFailure
monotouch-test/macOS/Release (static registrar, all optimizations): BuildFailure

Html Report (VSDrops) Download

Successes

✅ cecil: All 1 tests passed. Html Report (VSDrops) Download
✅ dotnettests (iOS): All 1 tests passed. Html Report (VSDrops) Download
✅ dotnettests (MacCatalyst): All 1 tests passed. Html Report (VSDrops) Download
✅ dotnettests (macOS): All 1 tests passed. Html Report (VSDrops) Download
✅ dotnettests (Multiple platforms): All 1 tests passed. Html Report (VSDrops) Download
✅ dotnettests (tvOS): All 1 tests passed. Html Report (VSDrops) Download
✅ framework: All 2 tests passed. Html Report (VSDrops) Download
✅ fsharp: All 4 tests passed. Html Report (VSDrops) Download
✅ generator: All 5 tests passed. Html Report (VSDrops) Download
✅ interdependent-binding-projects: All 4 tests passed. Html Report (VSDrops) Download
✅ introspection: All 6 tests passed. Html Report (VSDrops) Download
✅ linker: All 44 tests passed. [attempt 3] Html Report (VSDrops) Download
✅ monotouch (iOS): All 11 tests passed. Html Report (VSDrops) Download
✅ monotouch (tvOS): All 11 tests passed. Html Report (VSDrops) Download
✅ msbuild: All 2 tests passed. Html Report (VSDrops) Download
✅ sharpie: All 1 tests passed. Html Report (VSDrops) Download
✅ windows: All 3 tests passed. Html Report (VSDrops) Download
✅ xcframework: All 4 tests passed. Html Report (VSDrops) Download
✅ xtro: All 1 tests passed. Html Report (VSDrops) Download

macOS tests

✅ Tests on macOS Monterey (12): All 5 tests passed. Html Report (VSDrops) Download
✅ Tests on macOS Ventura (13): All 5 tests passed. Html Report (VSDrops) Download
✅ Tests on macOS Sonoma (14): All 5 tests passed. Html Report (VSDrops) Download
✅ Tests on macOS Sequoia (15): All 5 tests passed. Html Report (VSDrops) Download
✅ Tests on macOS Tahoe (26): All 5 tests passed. Html Report (VSDrops) Download

Pipeline on Agent
Hash: 0e7614ec93b6f5228d71c645c5b3a6b8b81f1c84 [PR build]

rolfbjarne requested review from emaf and mauroa as code owners March 4, 2026 09:57

rolfbjarne requested review from Copilot and jonathanpeppers March 4, 2026 09:57

Copilot started reviewing on behalf of rolfbjarne March 4, 2026 09:58 View session

Copilot AI reviewed Mar 4, 2026

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dalexsoto approved these changes Mar 4, 2026

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rolfbjarne and others added 2 commits March 4, 2026 15:56

Update dotnet/targets/Microsoft.Sdk.Desktop.targets

6c1a674

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

Update tests/dotnet/UnitTests/ProjectTest.cs

0e7614e

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

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vs-mobiletools-engineering-service2 commented Mar 4, 2026

✅ [CI Build #0e7614e] Build passed (Build packages) ✅

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vs-mobiletools-engineering-service2 commented Mar 4, 2026

✅ [PR Build #0e7614e] Build passed (Detect API changes) ✅

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vs-mobiletools-engineering-service2 commented Mar 4, 2026

✅ [CI Build #0e7614e] Build passed (Build macOS tests) ✅

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vs-mobiletools-engineering-service2 commented Mar 4, 2026

✅ API diff for current PR / commit

✅ API diff vs stable

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vs-mobiletools-engineering-service2 commented Mar 5, 2026

🔥 [CI Build #0e7614e] Test results 🔥

Test results

Failures

❌ monotouch tests (MacCatalyst) [attempt 3]

Failed tests

❌ monotouch tests (macOS) [attempt 3]

Failed tests

Successes

macOS tests

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