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26 changes: 26 additions & 0 deletions tools/AzDev/AzDev/AzDev.format.ps1xml
Original file line number Diff line number Diff line change
Expand Up @@ -50,5 +50,31 @@
</TableRowEntries>
</TableControl>
</View>
<View>
<Name>PSPackageDepDiff</Name>
<ViewSelectedBy>
<TypeName>AzDev.Models.PSModels.PSPackageDepDiff</TypeName>
</ViewSelectedBy>
<TableControl>
<TableRowEntries>
<TableRowEntry>
<TableColumnItems>
<TableColumnItem>
<PropertyName>DepName</PropertyName>
</TableColumnItem>
<TableColumnItem>
<PropertyName>OldVersion</PropertyName>
</TableColumnItem>
<TableColumnItem>
<PropertyName>NewVersion</PropertyName>
</TableColumnItem>
<TableColumnItem>
<PropertyName>ParentDep</PropertyName>
</TableColumnItem>
</TableColumnItems>
</TableRowEntry>
</TableRowEntries>
</TableControl>
</View>
</ViewDefinitions>
</Configuration>
3 changes: 2 additions & 1 deletion tools/AzDev/AzDev/AzDev.psd1
Original file line number Diff line number Diff line change
Expand Up @@ -76,7 +76,8 @@ FunctionsToExport = 'Connect-DevCommonRepo', 'Disconnect-DevCommonRepo'
CmdletsToExport = 'Get-DevContext', 'Set-DevContext',
'Get-DevModule', 'Get-DevProject',
'Update-DevAssembly',
'Open-DevSwagger'
'Open-DevSwagger',
'Compare-DevPackageDep'

# Variables to export from this module
VariablesToExport = '*'
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3 changes: 3 additions & 0 deletions tools/AzDev/CHANGELOG.md
Original file line number Diff line number Diff line change
Expand Up @@ -10,6 +10,9 @@
- Quick start templates
- Versioning and publishing AzDev module

## 2025/11/24
- Feature: new cmdlet `Compare-DevPackageDep` to compare dependencies between two versions of a nuget package.

## 2025/8/26
- Feature: Recognize AutoRest.PowerShell version (v3/v4) for AutoRest-based projects and show as `SubType` in `Get-DevProject` output.

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36 changes: 36 additions & 0 deletions tools/AzDev/README.md
Original file line number Diff line number Diff line change
Expand Up @@ -10,6 +10,7 @@ Like many other tools, this module targets `net8.0` so always run it in PowerShe
- [Features](#features)
- [Repo inventory](#repo-inventory)
- [Update Assemblies in `src/lib`](#update-assemblies-in-srclib)
- [Compare NuGet package dependencies](#compare-nuget-package-dependencies)
- [Connect azure-powershell and azure-powershell-common](#connect-azure-powershell-and-azure-powershell-common)
- [Autorest helper](#autorest-helper)
- [Open swagger online](#open-swagger-online)
Expand Down Expand Up @@ -83,6 +84,41 @@ Update-DevAssembly
# Check in all the changes
```

### Compare NuGet package dependencies

`Compare-DevPackageDep` compares dependencies between two versions of a NuGet package and reports the differences. This is particularly useful when upgrading package versions to understand the impact on the dependency tree.

The cmdlet not only reports direct dependency changes (added/removed/updated), but also recursively compares changed dependencies to show all transitive dependency changes.

```powershell
# Compare two versions of Azure.Core (TargetFramework defaults to netstandard2.0)
PS /> Compare-DevPackageDep -PackageName "Azure.Core" -OldVersion "1.47.3" -NewVersion "1.50.0"

DepName OldVersion NewVersion ParentDep
------- ---------- ---------- ---------
System.ClientModel 1.6.1 1.8.0 Azure.Core
System.Threading.Tasks.Extensions 4.5.4 4.6.0 Azure.Core
System.Runtime.CompilerServices.Unsafe 4.5.3 6.1.0 System.Threading.Tasks.Extensions

# Specify a different target framework
PS /> Compare-DevPackageDep -PackageName "Newtonsoft.Json" -OldVersion "13.0.1" -NewVersion "13.0.3" -TargetFramework "net462"

# Use -Debug to see all dependencies for both versions
PS /> Compare-DevPackageDep -PackageName "Azure.Core" -OldVersion "1.47.3" -NewVersion "1.50.0" -Debug
DEBUG: Comparing Azure.Core from 1.47.3 to 1.50.0 for netstandard2.0
DEBUG: [DefaultPackageComparisonService] Old version 1.47.3 dependencies:
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Copilot AI Nov 24, 2025

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The service class name in the debug message is inconsistent with the actual class name. The message uses DefaultPackageComparisonService but the class is named DefaultDepComparisonService.

Change line 109 to use the correct class name:

DEBUG: [DefaultDepComparisonService] Old version 1.47.3 dependencies:
Suggested change
DEBUG: [DefaultPackageComparisonService] Old version 1.47.3 dependencies:
DEBUG: [DefaultDepComparisonService] Old version 1.47.3 dependencies:

Copilot uses AI. Check for mistakes.
DEBUG: - Microsoft.Bcl.AsyncInterfaces 8.0.0
DEBUG: - System.ClientModel 1.6.1
DEBUG: - System.Diagnostics.DiagnosticSource 8.0.1
...
```

**Parameters:**
- `PackageName` (required): The NuGet package name to compare
- `OldVersion` (required): The old/baseline version
- `NewVersion` (required): The new version to compare against
- `TargetFramework` (optional): Target framework (default: `netstandard2.0`). Supports tab completion for common values: `netstandard2.0`, `net45`, `net46`, `net47`, `net461`, `net462`

### Connect azure-powershell and azure-powershell-common

Help you connect the azure-powershell and azure-powershell-common repositories for developing or debugging.
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181 changes: 181 additions & 0 deletions tools/AzDev/Tests/ServiceTests/PackageComparisonServiceTests.cs
Original file line number Diff line number Diff line change
@@ -0,0 +1,181 @@
// ----------------------------------------------------------------------------------
//
// Copyright Microsoft Corporation
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
// http://www.apache.org/licenses/LICENSE-2.0
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// ----------------------------------------------------------------------------------

using System.Collections.Generic;
using System.Linq;
using AzDev.Models.Dep;
using AzDev.Services;
using AzDev.Services.Assembly;
using AzDev.Services.Dep;
using Moq;

namespace AzDev.Tests.ServiceTests
{
public class PackageComparisonServiceTests
{
[Fact]
public void ComparePackageDependencies_DetectsVersionChange()
{
// Arrange
var mockNugetService = new Mock<INugetService>();

// Mock old version dependencies
mockNugetService.Setup(x => x.GetPackageDependencies("Azure.Core", "1.47.3", "netstandard2.0"))
.Returns(new List<PackageDep>
{
new PackageDep { Id = "System.ClientModel", Version = "1.6.1" },
new PackageDep { Id = "System.Text.Json", Version = "8.0.6" }
});

// Mock new version dependencies
mockNugetService.Setup(x => x.GetPackageDependencies("Azure.Core", "1.50.0", "netstandard2.0"))
.Returns(new List<PackageDep>
{
new PackageDep { Id = "System.ClientModel", Version = "1.8.0" },
new PackageDep { Id = "System.Text.Json", Version = "8.0.6" }
});

// Mock System.ClientModel dependencies (for recursive comparison)
mockNugetService.Setup(x => x.GetPackageDependencies("System.ClientModel", "1.6.1", "netstandard2.0"))
.Returns(new List<PackageDep>
{
new PackageDep { Id = "System.Text.Json", Version = "8.0.6" }
});

mockNugetService.Setup(x => x.GetPackageDependencies("System.ClientModel", "1.8.0", "netstandard2.0"))
.Returns(new List<PackageDep>
{
new PackageDep { Id = "System.Text.Json", Version = "8.0.6" }
});

var service = new DefaultDepComparisonService(mockNugetService.Object, NoopLogger.Instance);

// Act
var differences = service.ComparePackageDependencies(
"Azure.Core",
"1.47.3",
"1.50.0",
"netstandard2.0").ToList();

// Assert
Assert.NotEmpty(differences);
var systemClientModelChange = differences.FirstOrDefault(d => d.DepName == "System.ClientModel");
Assert.NotNull(systemClientModelChange);
Assert.Equal("Azure.Core", systemClientModelChange.ParentDep);
Assert.Equal("1.6.1", systemClientModelChange.OldVersion);
Assert.Equal("1.8.0", systemClientModelChange.NewVersion);

// Verify INugetService was called
mockNugetService.Verify(x => x.GetPackageDependencies("Azure.Core", "1.47.3", "netstandard2.0"), Times.Once);
mockNugetService.Verify(x => x.GetPackageDependencies("Azure.Core", "1.50.0", "netstandard2.0"), Times.Once);
}

[Fact]
public void ComparePackageDependencies_DetectsAddedDependency()
{
// Arrange
var mockNugetService = new Mock<INugetService>();

mockNugetService.Setup(x => x.GetPackageDependencies("TestPackage", "1.0.0", "netstandard2.0"))
.Returns(new List<PackageDep>
{
new PackageDep { Id = "Dependency1", Version = "1.0.0" }
});

mockNugetService.Setup(x => x.GetPackageDependencies("TestPackage", "2.0.0", "netstandard2.0"))
.Returns(new List<PackageDep>
{
new PackageDep { Id = "Dependency1", Version = "1.0.0" },
new PackageDep { Id = "Dependency2", Version = "2.0.0" }
});

var service = new DefaultDepComparisonService(mockNugetService.Object, NoopLogger.Instance);

// Act
var differences = service.ComparePackageDependencies(
"TestPackage",
"1.0.0",
"2.0.0",
"netstandard2.0").ToList();

// Assert
var addedDep = differences.FirstOrDefault(d => d.DepName == "Dependency2");
Assert.NotNull(addedDep);
Assert.Null(addedDep.OldVersion);
Assert.Equal("2.0.0", addedDep.NewVersion);
Assert.Equal("TestPackage", addedDep.ParentDep);
}

[Fact]
public void ComparePackageDependencies_DetectsRemovedDependency()
{
// Arrange
var mockNugetService = new Mock<INugetService>();

mockNugetService.Setup(x => x.GetPackageDependencies("TestPackage", "1.0.0", "netstandard2.0"))
.Returns(new List<PackageDep>
{
new PackageDep { Id = "Dependency1", Version = "1.0.0" },
new PackageDep { Id = "Dependency2", Version = "2.0.0" }
});

mockNugetService.Setup(x => x.GetPackageDependencies("TestPackage", "2.0.0", "netstandard2.0"))
.Returns(new List<PackageDep>
{
new PackageDep { Id = "Dependency1", Version = "1.0.0" }
});

var service = new DefaultDepComparisonService(mockNugetService.Object, NoopLogger.Instance);

// Act
var differences = service.ComparePackageDependencies(
"TestPackage",
"1.0.0",
"2.0.0",
"netstandard2.0").ToList();

// Assert
var removedDep = differences.FirstOrDefault(d => d.DepName == "Dependency2");
Assert.NotNull(removedDep);
Assert.Equal("2.0.0", removedDep.OldVersion);
Assert.Null(removedDep.NewVersion);
Assert.Equal("TestPackage", removedDep.ParentDep);
}

[Fact]
public void ComparePackageDependencies_SameVersions_ReturnsEmpty()
{
// Arrange
var mockNugetService = new Mock<INugetService>();

mockNugetService.Setup(x => x.GetPackageDependencies("TestPackage", "1.0.0", "netstandard2.0"))
.Returns(new List<PackageDep>
{
new PackageDep { Id = "Dependency1", Version = "1.0.0" }
});

var service = new DefaultDepComparisonService(mockNugetService.Object, NoopLogger.Instance);

// Act
var differences = service.ComparePackageDependencies(
"TestPackage",
"1.0.0",
"1.0.0",
"netstandard2.0").ToList();

// Assert
Assert.Empty(differences);
}
}
}
26 changes: 26 additions & 0 deletions tools/AzDev/spec/package-comparing-cmdlet.md
Original file line number Diff line number Diff line change
@@ -0,0 +1,26 @@
# A package dependency comparing cmdlet

The goal of this cmdlet is to compare two versions of a nuget package and report the differences about dependencies between them.

Note the cmdlet not only reports added/removed dependencies, but also reports dependencies that changed their version between the two package versions. For changed dependencies, it compares the old and new versions recursively to report all changes in the dependency tree.

## Example usage

```powershell
Compare-DevPackageDep -PackageName "Azure.Core" -OldVersion "1.47.3" -NewVersion "1.50.0" -TargetFramework "netstandard2.0"

# Output:
DepName OldVersion NewVersion ParentDep
----------- ---------- ---------- -------------
System.ClientModel 1.6.1 1.8.0 Azure.Core
```

## Cmdlet design considerations

- `TargetFramework` is optional and defaults to `netstandard2.0` if not specified. Add argument completer (not validate set) for it. Possible values: `netstandard2.0`, `net45`, `net46`, `net47`, `net461`, `net462`.
- In debug mode, list all dependencies with their versions for both old and new package versions.

## Implementation details

- Leverage `INugetService` to get dependencies of a package version. Do not re-implement nuget package reading logic.
- Mock `INugetService` in tests to avoid downloading packages from nuget.org.
73 changes: 73 additions & 0 deletions tools/AzDev/src/Cmdlets/Dep/ComparePackageDepCmdlet.cs
Original file line number Diff line number Diff line change
@@ -0,0 +1,73 @@
// ----------------------------------------------------------------------------------
//
// Copyright Microsoft Corporation
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
// http://www.apache.org/licenses/LICENSE-2.0
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// ----------------------------------------------------------------------------------

using System.Linq;
using System.Management.Automation;
using AzDev.Models.PSModels;
using AzDev.Services;
using AzDev.Services.Dep;

namespace AzDev.Cmdlets.Dep
{
[Cmdlet("Compare", "DevPackageDep")]
[OutputType(typeof(PSPackageDepDiff))]
public class ComparePackageDepCmdlet : DevCmdletBase
{
[Parameter(Mandatory = true, Position = 0)]
public string PackageName { get; set; }

[Parameter(Mandatory = true, Position = 1)]
public string OldVersion { get; set; }

[Parameter(Mandatory = true, Position = 2)]
public string NewVersion { get; set; }

[Parameter(Mandatory = false, Position = 3)]
[ArgumentCompleter(typeof(TargetFrameworkCompleter))]
public string TargetFramework { get; set; } = "netstandard2.0";

protected override void ProcessRecord()
{
base.ProcessRecord();

var packageComparisonService = AzDevModule.GetService<IDepComparisonService>();

WriteDebug($"Comparing {PackageName} from {OldVersion} to {NewVersion} for {TargetFramework}");

var differences = packageComparisonService.ComparePackageDependencies(
PackageName,
OldVersion,
NewVersion,
TargetFramework);

WriteObject(differences.Select(d => new PSPackageDepDiff(d)), true);
}
}

public class TargetFrameworkCompleter : IArgumentCompleter
{
public System.Collections.Generic.IEnumerable<CompletionResult> CompleteArgument(
string commandName,
string parameterName,
string wordToComplete,
System.Management.Automation.Language.CommandAst commandAst,
System.Collections.IDictionary fakeBoundParameters)
{
var frameworks = new[] { "netstandard2.0", "net45", "net46", "net47", "net461", "net462" };
return frameworks
.Where(f => f.StartsWith(wordToComplete, System.StringComparison.OrdinalIgnoreCase))
.Select(f => new CompletionResult(f, f, CompletionResultType.ParameterValue, f));
}
}
}
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