proposed feature for .net aspire

src/dotnetaspire/README.md

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+
+# .NET Aspire (dotnetaspire)
+
+This Feature installs .NET Aspire and if necessary the .NET (dotnet) that it depends on. Options are provided to choose a different version or additional versions.
+
+## OS Support
+
+This Feature should work on recent versions of Debian/Ubuntu-based distributions that support .NET and have the `apt` package manager installed
+
+`bash` is required to execute the `install.sh` script.
+
+## Example Usage
+
+```json
+"features": {
+    "ghcr.io/devcontainers/features/dotnetaspire:1": {}
+}
+```
+
+## Options
+
+| Options Id | Description | Type | Default Value |
+|-----|-----|-----|-----|
+| version | .NET Aspire version. Use 'latest' for the latest supported version, '9.0' for the 9.0 version, 'X.Y' or 'X.Y.Z' for a specific version, or 'latest-daily' for the latest unsupported build. | string | latest |
+
+## Customizations
+
+### VS Code Extensions
+
+- `ms-dotnettools.csdevkit`
+
+## Configuration examples
+
+Installing only the latest .NET Aspire version (the default).
+
+``` jsonc
+"features": {
+    "ghcr.io/devcontainers/features/dotnetaspire:1": "latest" // or "" or {}
+}
+```
+
+Installing .NET Aspire version 9.0.
+
+``` jsonc
+"features": {
+    "ghcr.io/devcontainers/features/dotnetaspire:1": "9.0" // or "" or {}
+}
+```
+
+Installing the latest .NET Aspire unsupported build.
+
+``` jsonc
+"features": {
+    "ghcr.io/devcontainers/features/dotnetaspire:1": "latest-daily" // or "" or {}
+}
+```
+
+
+## OS Support
+
+This Feature should work on recent versions of Debian/Ubuntu-based distributions with the `apt` package manager installed.
+
+`bash` is required to execute the `install.sh` script.
+

src/dotnetaspire/devcontainer-feature.json

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+{
+    "id": "dotnetaspire",
+    "version": "1.0.0",
+    "name": ".NET Aspire",
+    "documentationURL": "https://github.com/devcontainers/features/tree/main/src/dotnetaspire",
+    "description": "Installs .NET Aspire. See https://aka.ms/dotnetaspire",
+    "options": {
+        "version": {
+            "type": "string",
+            "proposals": [
+                "latest daily",
+                "latest",
+                "9.0",
+            ],
+            "default": "9.0",
+            "description": "Select or enter a .NET Aspire version. Use 'latest' for the latest supported version, '9.0' for the 9.0 version, 'X.Y' or 'X.Y.Z' for a specific version, or 'latest-daily' for the latest unsupported build."
+        },
+    },
+    "customizations": {
+        "vscode": {
+            "extensions": [
+                "ms-dotnettools.csdevkit",
+                "ms-azuretools.vscode-bicep",
+                "GitHub.copilot-chat",
+                "GitHub.copilot"
+            ],
+            "settings": {
+                "remote.autoForwardPorts": true,
+                "remote.autoForwardPortsSource": "hybrid",
+                "remote.otherPortsAttributes": {
+                    "onAutoForward": "ignore"
+                }
+            }
+        }
+    },
+    "dependsOn": {
+        "ghcr.io/devcontainers/features/dotnet": {
+            "version": "8.0",
+            "additionalVersions": "9.0"
+        }
+    }
+}

src/dotnetaspire/install.sh

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+#!/usr/bin/env bash
+
+#-------------------------------------------------------------------------------------------------------------
+# Copyright (c) Microsoft Corporation. All rights reserved.
+# Licensed under the MIT License. See https://go.microsoft.com/fwlink/?linkid=2090316 for license information.
+#-------------------------------------------------------------------------------------------------------------
+#
+# Docs: https://github.com/devcontainers/features/tree/main/src/dotnet
+# Maintainer: The .NET Aspire team at https://github.com/dotnet/aspire
+
+set -e
+
+# default to latest if not specified
+VERSION="${VERSION:-"latest"}"
+
+if [[ ! $VERSION =~ ^(9\.0|latest|latest-daily)$ ]]; then
+    echo "Error: VERSION must be either '9.0', '9.0.0', 'latest', or 'latest-daily' not: '$VERSION'."
+    exit 1
+fi
+
+if [[ $VERSION =~ ^(9\.0|9\.0\.0|latest)$ ]]; then
+    VERSION="9.0.0"
+fi
+
+echo "Activating feature '.NET Aspire' version: $VERSION"
+
+# Before .NET Aspire 9.0 install required `dotnet workload`: this is no longer necessary, as Aspire is 
+# installed when restoring Aspire projects. It's only necessary to install the appropriate version of the templates.
+
+
+if [[ $VERSION =~ ^(9\.0\.0)$ ]]; then
+    dotnet new install Aspire.ProjectTemplates::$VERSION
+else
+    # https://github.com/dotnet/aspire/blob/main/docs/using-latest-daily.md
+    dotnet nuget add source --name dotnet9 https://pkgs.dev.azure.com/dnceng/public/_packaging/dotnet9/nuget/v3/index.json
+
+    # If you use Package Source Mapping, you'll also need to add the following mappings to your NuGet.config
+    # <packageSourceMapping>
+    #   <packageSource key="dotnet9">
+    #     <package pattern="Aspire.*" />
+    #     <package pattern="Microsoft.Extensions.ServiceDiscovery*" />
+    #     <package pattern="Microsoft.Extensions.Http.Resilience" />
+    #   </packageSource>
+    # </packageSourceMapping>
+
+    dotnet new install Aspire.ProjectTemplates::*-* --force
+fi
+
+echo "... done activating feature '.NET Aspire' version: $VERSION"

test/dotnetaspire/dotnet_env.sh

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+#!/bin/bash
+export DOTNET_NOLOGO=true
+export DOTNET_SKIP_FIRST_TIME_EXPERIENCE=true
+export DOTNET_GENERATE_ASPNET_CERTIFICATE=false

test/dotnetaspire/install_dotnetaspire_exact_version.sh

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+#!/usr/bin/env bash

test/dotnetaspire/install_dotnetaspire_latest_daily_version.sh

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+#!/usr/bin/env bash

test/dotnetaspire/install_dotnetaspire_latest_version.sh

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+#!/usr/bin/env bash

test/dotnetaspire/scenarios.json

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+{
+    "install_dotnetaspire_exact_version": {
+        "image": "mcr.microsoft.com/devcontainers/base:ubuntu",
+        "features": {
+            "dotnetaspire": {
+                "version": "9.0"
+            }
+        }
+    },
+    "install_dotnetaspire_latest_version": {
+        "image": "mcr.microsoft.com/devcontainers/base:ubuntu",
+        "features": {
+            "dotnetaspire": {
+                "version": "latest"
+            }
+        }
+    },
+    "install_dotnetaspire_latest_daily_version": {
+        "image": "mcr.microsoft.com/devcontainers/base:ubuntu",
+        "features": {
+            "dotnetaspire": {
+                "version": "latest-daily"
+            }
+        }
+    }
+}

test/dotnetaspire/test.sh

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+#!/usr/bin/env bash
+
+set -e
+
+# Run tests with `devcontainer features test -f dotnetaspire` in the parent of the src and test folders.
+
+source dev-container-features-test-lib
+source dotnet_env.sh
+
+check "dotnet is installed in DOTNET_ROOT and execute permission is granted" \
+test -x "$DOTNET_ROOT/dotnet" 
+
+check "dotnet 8.0 is installed" \
+test "$($DOTNET_ROOT/dotnet --info | grep '8.0.')"
+
+check "dotnet 9.0 is installed" \
+test "$($DOTNET_ROOT/dotnet --info | grep '9.0.')"
+
+check "dotnetaspire templates are installed" \
+test "$DOTNET_ROOT/dotnet new aspire"
+
+# There isn't currently a good way to check what version of the templates was installed.
+
+reportResults