NetSparkleUpdater.SparkleUpdater 3.0.0-preview20240915001

This is a prerelease version of NetSparkleUpdater.SparkleUpdater.
dotnet add package NetSparkleUpdater.SparkleUpdater --version 3.0.0-preview20240915001                
NuGet\Install-Package NetSparkleUpdater.SparkleUpdater -Version 3.0.0-preview20240915001                
This command is intended to be used within the Package Manager Console in Visual Studio, as it uses the NuGet module's version of Install-Package.
<PackageReference Include="NetSparkleUpdater.SparkleUpdater" Version="3.0.0-preview20240915001" />                
For projects that support PackageReference, copy this XML node into the project file to reference the package.
paket add NetSparkleUpdater.SparkleUpdater --version 3.0.0-preview20240915001                
#r "nuget: NetSparkleUpdater.SparkleUpdater, 3.0.0-preview20240915001"                
#r directive can be used in F# Interactive and Polyglot Notebooks. Copy this into the interactive tool or source code of the script to reference the package.
// Install NetSparkleUpdater.SparkleUpdater as a Cake Addin
#addin nuget:?package=NetSparkleUpdater.SparkleUpdater&version=3.0.0-preview20240915001&prerelease

// Install NetSparkleUpdater.SparkleUpdater as a Cake Tool
#tool nuget:?package=NetSparkleUpdater.SparkleUpdater&version=3.0.0-preview20240915001&prerelease                

<div align="center"> <img alt="NetSparkleUpdater logo" height="200" src="src/NetSparkle/ArtWork/software-update-available.png"> <h1>NetSparkleUpdater</h1> <p>An easily customizable software update framework for C# .NET projects with built-in UIs for WinForms, WPF, and Avalonia</p> <a href="https://gitter.im/NetSparkleUpdater/NetSparkle?utm_campaign=pr-badge&utm_content=badge&utm_medium=badge&utm_source=badge"> <img alt="Gitter" src="https://badges.gitter.im/Join%20Chat.svg"> </a> <a href="https://github.com/NetSparkleUpdater/NetSparkle/issues"> <img alt="Gitter" src="https://img.shields.io/github/issues/NetSparkleUpdater/NetSparkle.svg?style=flat-square"> </a> </div>

NetSparkle is a highly-configurable software update framework for C# that is compatible with .NET 6+ and .NET Framework 4.6.2+, has pre-built UIs for .NET Framework (WinForms, WPF) and .NET 6+ (WinForms, WPF, Avalonia), uses Ed25519 or other cryptographic signatures, and even allows for custom UIs or no built-in UI at all! You provide, somewhere on the internet, an app cast with update and version information, along with release notes in Markdown or HTML format. This library then helps you check for an update, show the user the release notes, and offer to download/install the new version of the software.

NetSparkle 2.0 brings the ability to customize most of NetSparkle -- custom UIs are now possible, you can have custom app cast downloaders and handlers (e.g. for FTP download or JSON app casts), and many more enhancements are available!

Note: NetSparkle 3.0 development is in progress and includes: built-in JSON app cast reading/writing instead of just XML, built-in ability to use different channels for your apps (e.g. beta, alpha, preview), semver compatibility, a reworked app cast serializing/deserializing API, a new assembly accessor, trimming/AOT compatibility, smaller file size due to fewer dependencies, and more! See the Issues list for more information about what's left. Updates to this README are pending, so ask questions on Gitter or on GitHub discussions if you're using a newer preview/building from source.

Built-in supported update download types:

  • Windows -- .exe, .msi, .msp
  • macOS -- .tar, .tar.gz, .zip, .pkg, .dmg
  • Linux -- .tar.gz, .deb, .rpm

Getting Started

Installing NetSparkle

NetSparkle is available via NuGet. To choose a NuGet package to use:

  • Reference the core NetSparkleUpdater.SparkleUpdater package if you don't care about having a built-in UI and can manage things yourself
  • Choose one of the other packages if you want a built-in UI or want to create your UI based on one of the other UIs
Package Use Case Release Preview Downloads
NetSparkleUpdater.SparkleUpdater Core package; Use a 100% custom UI or no UI (nothing built-in) NuGet NuGet NuGet
WinForms UI (.NET Framework) NetSparkle with built-in WinForms UI NuGet NuGet NuGet
WinForms UI (.NET 6+) NetSparkle with built-in WinForms UI NuGet NuGet NuGet
WPF UI (.NET Framework and .NET 6+) NetSparkle with built-in WPF UI NuGet NuGet NuGet
Avalonia UI NetSparkle with built-in Avalonia UI NuGet NuGet NuGet
App Cast Generator Tool netsparkle-generate-appcast CLI tool (incl. Ed25519 helpers) NuGet NuGet NuGet
DSA Helper Tool netsparkle-dsa CLI tool (DSA helpers) NuGet NuGet NuGet

Quick info for tool installations:

  • App cast generator -- dotnet tool install --global NetSparkleUpdater.Tools.AppCastGenerator; available as netsparkle-generate-appcast on your command line after installation
  • DSA Helper -- dotnet tool install --global NetSparkleUpdater.Tools.DSAHelper; available as netsparkle-dsa on your command line after installation

How updates work

A typical software update path for a stereotypical piece of software might look like this:

  1. Compile application so it can be run on other computers (e.g. dotnet publish)
  2. Programmer puts app in some sort of installer/zip/etc. for distribution (e.g. InnoSetup for Windows)
  3. Programmer creates app cast file (see the app cast section of this document for more info on how to create this)
  4. Programmer uploads files for distribution (installer, app cast file, appCast-file.signature file) to their download site.
  5. Client opens app and is automatically notified of an available update (or the software otherwise detects there is an update)
  6. Client chooses to update (or update is downloaded if the software downloads it automatically)
  7. Update is downloaded and sitting on the user's disk
  8. User is asked to close the software so the update can run. User closes the software.
  9. Downloaded file/installer is run (or the update is otherwise performed)

Right now, NetSparkleUpdater does not help you with 1., 2., or 4. "Why not?", you might ask:

    1. We can't compile your application for you since we don't know (or care) how you are compiling or packaging your application! 😃
    1. A cross-platform installer package/system would be difficult and may not feel normal to end users, although a system that uses Avalonia could maybe work I suppose (might take a lot of work though and make downloads large!). We do not provide support for getting your installer/distribution ready. To generate your installer/distribution, we recommend the following:
    1. We don't know where your files will live on the internet, so you need to be responsible for uploading these files and putting them online somewhere.

To create your app cast file, see the app cast section of this document.

We are open to contributions that might make the overall install/update process easier for the user. Please file an issue first with your idea before starting work so we can talk about it.

Basic Usage

Please look at the sample projects in this repository for basic, runnable usage samples!! There are samples on using each of the built-in UIs as well as a "do it yourself in your own UI" sample!

Project file

In your project file, make sure you set up a few things so that the library can read in the pertinent details later. Note: You can use your own IAssemblyAccessor to load version information from somewhere else. However, setting things up in your project file is easy, and NetSparkleUpdater can read that in natively!

<PropertyGroup>
    <Version>1.0.2-beta1</Version> 
    <AssemblyVersion>1.0.2</AssemblyVersion> 
    <AssemblyTitle>My Best App</AssemblyTitle>
    <Description>My app is cool (not required)</Description>
    <Company>My Company Name (required unless you set the IAssemblyAccessor save path yourself)</Company>
    <Product>My Product (required unless you set the IAssemblyAccessor save path yourself; set to product name e.g. MyBestApp)</Product>
    <Copyright>2024 MyCompanyName</Copyright>
</PropertyGroup>

IMPORTANT NOTE: In .NET 8+, a change was made that causes your git/source code commit hash to be included in your app's <Version> number. This behavior cannot be avoided by NetSparkleUpdater at this time as we rely on AssemblyInformationalVersionAttribute, and this attribute's behavior was changed. Your users may be told that they are currently running 1.0.0+commitHashHere by NetSparkleUpdater (and your native app itself!). We also recommend adding the following lines to your project file (in a new <PropertyGroup> or an existing one):

<IncludeSourceRevisionInInformationalVersion>false</IncludeSourceRevisionInInformationalVersion>

Code

// NOTE: Under most, if not all, circumstances, SparkleUpdater should be initialized on your app's main UI thread.
// This way, if you're using a built-in UI with no custom adjustments, all calls to UI objects will automatically go to the UI thread for you.
// Basically, SparkleUpdater's background loop will make calls to the thread that the SparkleUpdater was created on via SyncronizationContext.
// So, if you start SparkleUpdater on the UI thread, the background loop events will auto-call to the UI thread for you.
_sparkle = new SparkleUpdater(
    "http://example.com/appcast.xml", // link to your app cast file
    new Ed25519Checker(SecurityMode.Strict, // security mode -- use .Unsafe to ignore all signature checking (NOT recommended!!)
                       "base_64_public_key") // your base 64 public key -- generate this with the NetSparkleUpdater.Tools.AppCastGenerator .NET CLI tool on any OS
) {
    UIFactory = new NetSparkleUpdater.UI.WPF.UIFactory(icon), // or null, or choose some other UI factory, or build your own IUIFactory implementation!
    RelaunchAfterUpdate = false, // default is false; set to true if you want your app to restart after updating (keep as false if your installer will start your app for you)
    CustomInstallerArguments = "", // set if you want your installer to get some command-line args
};
_sparkle.StartLoop(true); // `true` to run an initial check online -- only call StartLoop **once** for a given SparkleUpdater instance!

On the first Application.Idle event, your App Cast XML file will be downloaded, read, and compared to the currently running version. If it has a software update inside, the user will be notified with a little toast notification (if supported by the UI and enabled) or with an update dialog containing your release notes. The user can then ignore the update, ask to be reminded later, or download/install it now.

If you want to check for an update in the background without the user seeing anything, use

var updateInfo = _sparkle.CheckForUpdatesQuietly();

If you want to have a menu item for the user to check for updates so the user can see the UI while NetSparkle looks for updates, use

_sparkle.CheckForUpdatesAtUserRequest();

If you have files that need saving, subscribe to the PreparingToExit event:

_sparkle.PreparingToExit += ((x, cancellable) =>
{
	// ask the user to save, whatever else is needed to close down gracefully
});

Note that if you do not use a UIFactory, you must use the CloseApplication or CloseApplicationAsync events to close your application; otherwise, your downloaded update file will never be executed/read! The only exception to this is if you want to handle all aspects of installing the update package yourself.

The file that launches your downloaded update executable only waits for 90 seconds before giving up! Make sure that your software closes within 90 seconds of CloseApplication/CloseApplicationAsync being called if you implement those events! If you need an event that can be canceled, such as when the user needs to be asked if it's OK to close (e.g. to save their work), use PreparingForExit or PreparingToExitAsync.

App cast

The app cast is just an XML file. It contains fields such as the title and description of your product as well as a definition per release of your software.

We strongly recommend that you make use of the netsparkle-generate-appcast tool to create (and later, re-create/update) the file because it can help take care of all signing requirements for you.

Install AppCast Generator Tool

  1. This tool requires the .NET 6, 7, or 8 Desktop Runtime to be installed.
  2. dotnet tool install --global NetSparkleUpdater.Tools.AppCastGenerator
  3. The tool is now available on your command line as the netsparkle-generate-appcast command. You can use netsparkle-generate-appcast --help to see a full list of options for this tool.
Sparkle Compatibility

NetSparkle uses Sparkle-compatible app casts for the most part. NetSparkle uses sparkle:signature rather than sparkle:dsaSignature so that you can choose how to sign your files/app cast. NetSparkle is compatible with and uses Ed25519 signatures by default, but the framework can handle a different implementation of the ISignatureVerifier class to check different kinds of signatures without a major version bump/update.

DSA vs Ed25519 Signatures

If your app has DSA signatures, the app cast generator uses Ed25519 signatures by default starting with preview 2.0.0-20200607001. To transition to Ed25519 signatures, create an update where the software has your new Ed25519 public key and a NEW url for a NEW app cast that uses Ed25519 signatures. Upload this update with an app cast that has DSA signatures so your old DSA-enabled app can download the Ed25519-enabled update. Then, future updates and app casts should all use Ed25519.

Here is a sample app cast:

<?xml version="1.0" encoding="UTF-8"?>
<rss xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:sparkle="http://www.andymatuschak.org/xml-namespaces/sparkle" version="2.0">
    <channel>
        <title>NetSparkle Test App</title>
        <link>https://netsparkleupdater.github.io/NetSparkle/files/sample-app/appcast.xml</link>
        <description>Most recent changes with links to updates.</description>
        <language>en</language>
        <item>
            <title>Version 2.0 (2 bugs fixed; 3 new features)</title>
            <sparkle:releaseNotesLink>
            https://netsparkleupdater.github.io/NetSparkle/files/sample-app/2.0-release-notes.md
            </sparkle:releaseNotesLink>
            <pubDate>Thu, 27 Oct 2016 10:30:00 +0000</pubDate>
            <enclosure url="https://netsparkleupdater.github.io/NetSparkle/files/sample-app/NetSparkleUpdate.exe"
                       sparkle:version="2.0"
                       sparkle:os="windows"
                       length="12288"
                       type="application/octet-stream"
                       sparkle:signature="NSG/eKz9BaTJrRDvKSwYEaOumYpPMtMYRq+vjsNlHqRGku/Ual3EoQ==" />
        </item>
    </channel>
</rss>

App Cast Items

NetSparkle reads the <item> tags to determine whether updates are available.

The important tags in each <item> are:

  • <description>
    • A description of the update in HTML or Markdown.
    • Overrides the <sparkle:releaseNotesLink> tag.
  • <sparkle:releaseNotesLink>
    • The URL to an HTML or Markdown document describing the update.
    • If the <description> tag is present, it will be used instead.
    • Attributes:
      • sparkle:signature, optional: the DSA/Ed25519 signature of the document; NetSparkle does not check this signature for you unless you set ReleaseNotesGrabber.ChecksReleaseNotesSignature to true, but you may manually verify changelog signatures if you like or set ReleaseNotesGrabber.ChecksReleaseNotesSignature = true in your UI.
  • <pubDate>
    • The date this update was published
  • <enclosure>
    • This tag describes the update file that NetSparkle will download.
    • Attributes:
      • url: URL of the update file
      • sparkle:version: machine-readable version number of this update
      • length, optional: (not validated) size of the update file in bytes
      • type: ignored
      • sparkle:signature: DSA/Ed25519 signature of the update file
      • sparkle:criticalUpdate, optional: if equal to true or 1, the UI will indicate that this is a critical update
      • sparkle:os: Operating system for the app cast item. Defaults to Windows if not supplied. For Windows, use "win" or "windows"; for macOS, use "macos" or "osx"; for Linux, use "linux".

By default, you need 2 signatures (SecurityMode.Strict):

  1. One in the enclosure tag for the update file (sparkle:signature="...")
  2. Another on your web server to secure the actual app cast file. This file must be located at [AppCastURL].signature. In other words, if the app cast URL is http://example.com/awesome-software.xml, you need a valid (DSA/Ed25519) signature for that file at http://example.com/awesome-software.xml.signature.

Note: the app cast generator tool creates both of these signatures for you when it recreates the appcast.xml file.

Ed25519 Signatures

You can generate Ed25519 signatures using the AppCastGenerator tool (from this NuGet package or in the source code here). This tool requires the .NET 6, 7, or 8 Desktop Runtime to be installed. Please see below sections for options and examples on generating the Ed25519 keys and for using them when creating an app cast.

How can I make the app cast?

  • Use the AppCastGenerator tool (from this NuGet package or in the source code here) to easily create your app cast file. Available options are described below. You can install it on your CLI via dotnet tool install --global NetSparkleUpdater.Tools.AppCastGenerator.
  • Rig up a script that generates the app cast for you in python or some other language (string.Format or similar is a wonderful thing).
  • Or you can just copy/paste the above example app cast into your own file and tweak the signatures/download info yourself, then generate the (Ed25519/DSA) signature for the app cast file manually! 😃

App Cast Generator Options

Missing some option you'd like to see? File an issue on this repo or add it yourself and send us a pull request!

  • --show-examples: Print examples of usage to the console.
  • --help: Show all options and their descriptions.
General Options When Generating App Cast
  • -a/--appcast-output-directory: Directory in which to write the output appcast.xml file. Example use: -a ./Output
  • -e/--ext: When looking for files to add to the app cast, use the given extension. Defaults to exe. Example use: -e exe
  • -b/--binaries: File path to directory that should be searched through when looking for files to add to the app cast. Defaults to .. Example use: -b my/build/directory
  • -r/--search-binary-subdirectories: True to search the binary directory recursively for binaries; false to only search the top directory. Defaults to false. Example use: -r.
  • -f/--file-extract-version: Whether or not to extract the version of the file from the file's name rather than the file itself. Defaults to false. Use when your files that will be downloaded by NetSparkleUpdater will have the version number in the file name, e.g. "My App 1.3.2.exe". Example use: -f true
  • -o/--os: Operating system that the app cast items belong to. Must be one of the following: windows, mac, linux. Defaults to windows. Example use: -o linux
  • -u/--base-url: Beginning portion of the URL to use for downloads. The file name that will be downloaded will be put after this portion of the URL. Example use: -u https://myawesomecompany.com/downloads
  • -l/--change-log-url: Beginning portion of the URL to use for your change log files. The change log file that will be downloaded will be put after this portion of the URL. If this option is not specified, then the change log data will be put into the app cast itself. Example use: -l https://myawesomecompany.com/changes
  • -p/--change-log-path: Path to the change log files for your software. These are expected to be in markdown format with an extension of .md. The file name of the change log files must contain the version of the software, e.g. 1.3.2.md. Example use: -p path/to/change/logs. (Note: The generator will also attempt to find change logs whose file names are formatted like so: MyApp 1.3.2.md.)
  • --change-log-name-prefix: Prefix for change log file names. By default, the generator searches for file names with the format "[Version].md". If you set this parameter to (for example) "My App Change Log", it will search for file names with the format "My App Change Log [Version].md" as well as "[Version].md".
  • -n/--product-name: Product name for your software. Used when setting the title for your app cast and its items. Defaults to Application. Example use: -n "My Awesome App"
  • -x/--url-prefix-version: Add the version number as a prefix to the file name for the download URL. Defaults to false. For example, if --base-url is www.example.com/downloads, your version is 1.4.2, and your app name is MyApp.exe, your download URL will become www.example.com/downloads/1.4.2/MyApp.exe. Example use: -x true.
  • --key-path: Path to NetSparkle_Ed25519.priv and NetSparkle_Ed25519.pub files, which are your private and public Ed25519 keys for your software updates, respectively. Example use: --key-path my/path/to/keys
    • If you want to use keys dynamically, you can set the SPARKLE_PRIVATE_KEY and SPARKLE_PUBLIC_KEY environment variables before running generate_appcast. The tool prioritizes environment keys over keys sitting on disk!
  • --signature-file-extension: Extension (WITHOUT the .) to use for the appcast xml signature file. Defaults to signature. Example use: --signature-file-extension txt.
  • --file-version: Use to set the version for a binary going into an app cast. Note that this version can only be set once, so when generating an app cast, make sure you either: A) have only one binary in your app cast | B) Utilize the --reparse-existing parameter so that old items get picked up. If the generator finds 2 binaries without any known version and --file-version is set, then an error will be emitted.
  • --critical-versions: Comma-separated list of versions to mark as critical in the app cast. Must match version text exactly. E.g., "1.0.2,1.2.3.1".
Options for Key Generation
  • --generate-keys: If set, will attempt to generate NEW Ed25519 keys for you. Can be used in conjunction with --key-path. Once keys are successfully (or unsuccessfully) generated, the program ends without generating an app cast. By default, existing keys are not overwritten. This option defaults to false.
  • --force: If set to true, will overwrite existing keys on disk. WARNING: THIS COULD RESULT IN A LOSS OF YOUR PUBLIC AND PRIVATE KEYS. USE WITH CAUTION. DO NOT USE IF YOU DO NOT KNOW WHAT YOU ARE DOING! THIS WILL MAKE NO ATTEMPT TO BACK UP YOUR DATA. This option defaults to false. Example use: --generate-keys --force true.
  • --export: Export keys as base 64 strings to the console. Defaults to false. Example use: --export true. Output format:
Private Key:
2o34usledjfs0
Public Key:
sdljflase;ru2u3
Options for Generating Signatures Without App Cast
  • --generate-signature: Generate a signature for a file and output it to the console. Example use: --generate-signature path/to/app/MyApp.exe. Outputs in format: Signature: seljr13412zpdfj.
Options for Verifying Signatures

Note that these options are only for verifying Ed25519 signatures. For DSA signatures, please use the DSAHelper tool. Both of the following options must be used together. You must have keys already generated in order to verify file signatures.

  • --verify: Path to the file that has a signature you want to verify.
  • --signature: Base 64 signature of the file.

Example use: --verify my/path/MyApp.exe --signature 123l4ijsdfzderu23.

This will return either Signature valid (signature is good!) or Signature invalid (signature does not match file).

App Cast Generator Examples

#### Key Generation
# Generate Ed25519 keys for the first time
netsparkle-generate-appcast --generate-keys
# Store keys in a custom location
netsparkle-generate-appcast --key-path path/to/store/keys
# Pass in public key via command line
netsparkle-generate-appcast --public-key-override [YourPublicKeyHere]
# Pass in private key via command line
netsparkle-generate-appcast --private-key-override [YourPrivateKeyHere]

# By default, your Ed25519 signatures are stored on disk in your local 
# application data folder in a subdirectory called `netsparkle`. 
# If you want to export your keys to the console, you can do:
netsparkle-generate-appcast --export

# You can also store your keys in the following environment variables:
# set public key: SPARKLE_PUBLIC_KEY
# set private key: SPARKLE_PRIVATE_KEY

#### Generate a signature for a binary without creating an app cast:
netsparkle-generate-appcast --generate-signature path/to/binary.exe

#### Verifying Binaries
netsparkle-generate-appcast --verify path/to/binary.exe --signature base_64_signature

#### Using a custom key location:
# If your keys are sitting on disk somewhere
# (`NetSparkle_Ed25519.priv` and `NetSparkle_Ed25519.pub` -- both 
# in base 64 and both on disk in the same folder!), you can pass in 
# the path to these keys like this:
netsparkle-generate-appcast --key-path path/to/keys/

#### Generating an app cast

# Generate an app cast for Windows executables that are sitting in a 
# specific directory
netsparkle-generate-appcast -a directory/for/appcast/output/ -e exe -b directory/with/binaries/ -o windows

# Add change log info to your app cast
netsparkle-generate-appcast -b binary/folder -p change/log/folder

# Customize download URL for binaries and change logs
netsparkle-generate-appcast -b binary/folder -p change/log/folder -u https://example.com/downloads -p https://example.com/downloads/changelogs

# Set your application name for the app cast
netsparkle-generate-appcast -n "My Awesome App" -b binary/folder

# Use file versions in file names, e.g. for apps like "My App 1.2.1.dmg"
netsparkle-generate-appcast -n "macOS version" -o macos -f true -b binary_folder -e dmg

# Don't overwrite the entire app cast file
netsparkle-generate-appcast --reparse-existing

# Don't overwrite the entire app cast file, but do overwrite items that are still on disk
netsparkle-generate-appcast --reparse-existing --reparse-overwrite-old-items

Upgrading between major versions

Please see UPGRADING.md for information on breaking changes between major versions.

FAQ

Am I required to use a UI with NetSparkleUpdater?

Nope. You can just reference the core library and handle everything yourself, including any custom UI. Check out the code samples for an example of doing that!

Can I run my UI on another thread besides my main UI thread?

This isn't a built-in feature, as NetSparkleUpdater assumes that it can safely make calls/events to the UI on the thread that started the SparkleUpdater instance. However, if you'd like to do this, we have a sample on how to do this: NetSparkle.Samples.Forms.Multithread. Basically, instead of passing in a UIFactory to SparkleUpdater, you handle SparkleUpdater's events yourself and show the UI however you want to show it - and yes, you can still use the built-in UI objects for this!

(Note that on Avalonia, the answer is always "No" since they only support one UI thread at this time.)

On WinForms, can I let the user close the main window and still keep the updater forms around?

Yes. You need to start the NetSparkleUpdater forms on a new thread(s). See the NetSparkle.Samples.Forms.Multithread sample for how to do this by handling events yourself and still using the built-in WinForms UIFactory.

How do I make my .NET Framework WinForms app high DPI aware?

See #238 and this documentation for the fix for making this work on the sample application. Basically, you need to use an app config file and manifest file to let Windows know that your application is DPI-aware. If that doesn't work for you, try some of the tips at this SO post.

What's all this about trimming?

Trimming is a great way to reduce the file size of your application when it is self-published and/or built as a self-contained application. In short, trimming removes unused code from your applications, including external libraries, so you can ship your application with a reduced file size. To trim your application on publish, add <PublishTrimmed>true</PublishTrimmed> to your csproj file. If you want to trim all assemblies (including those that may not have specified they are compatible with trimming), add <TrimMode>full</TrimMode> to your csproj file; to only trim those that have opted-in, use <TrimMode>partial</TrimMode>. To enable warnings for trimming, add <SuppressTrimAnalysisWarnings>false</SuppressTrimAnalysisWarnings>.

There are other options to use, which you can learn more about on Microsoft's documentation here. For those applications that may not work with the built-in trimming options, please try Zack.DotNetTrimmer or other solutions you may find.

We recommend that you trim your application before publishing it and distributing it to your users. Some of NetSparkle's default dependencies are rather large, but the file size can be drastically reduced by the trim process. If you choose to trim your application, don't forget to test it after trimming and make sure you fix any warnings that come up!

You can also read more about trimming libraries here.

Is this library compatible with AOT compilation?

Yes.

Is this library nullable aware?

Yes.

Yes. In the app cast generator, you can do things like, -u ../ to make NetSparkle check the directory above the server's appcast.xml file for download files.

NuGet has lots of packages when I search for "NetSparkle", which one do I use?

NetSparkleUpdater.SparkleUpdater is the right package if you want the library with no built-in UI. Otherwise, use NetSparkleUpdater.UI.{YourChoiceOfUI}, which will give you a built-in UI and the core library. Previous to 2.0, the UI libraries reference NetSparkle.New, which is now deprecated.

Here is the full list of deprecated packages:

Must I put all my release versions into a single app cast file?

No. If your app is just using NetSparkle to work out if there is a later release - and you are not using the app cast as a way to refer to historical versions of your app in any way - then you don't need to add all the released versions into the app cast file.

Having just the latest version of your software in the app cast has the added side effect that you won't need all the binaries & changelogs of all the versions to be available to the app cast generator tool. For example, this might make an automated release build easier via GitHub Actions - because the only data required is the generated .exe and changelogs from your git repository.

How can I use NetSparkleUpdater with AppCenter?

Note: AppCenter is scheduled for retirement on March 31, 2025.
  1. Make sure you've read over the documentation here
  2. Decide if you want to generate signatures for your files. If so, make sure that works, and then use NetSparkleUpdater as normal.
  3. If you don't want to generate signatures because you trust your AppCenter builds, use SecurityMode.Unsafe or the following IAppCastHandler override:
public override bool DownloadAndParse()
{
    try
    {
        _logWriter.PrintMessage("Downloading app cast data...");

        var appCast = _dataDownloader.DownloadAndGetAppCastData(_castUrl);
        if (!string.IsNullOrWhiteSpace(appCast))
        {
            Items.Clear();
            Items.AddRange(ParseAppCast(appcast));
            return true;
        }
    }
    catch (Exception e)
    {
        _logWriter.PrintMessage("Error reading app cast {0}: {1} ", _castUrl, e.Message);
    }

    return false;
}

Is reverting your application version supported?

The answer is both yes and no. No, because that is not the default behavior. Yes, because if you use installers for each of your versions, you can use your app cast to see which previous versions are available and download those versions. If your installers are standalone, they should install an old version just fine. Just keep in mind that if you install an old version and then there is a newer version in your app cast, after opening the older software, it will ask them if they want to update to the newer version!

Here's a summary of what you can do:

  1. Setup your SparkleUpdater object
  2. Call _updateInfo = await _sparkle.CheckForUpdatesQuietly(); (no UI shown) or _sparkle.CheckForUpdatesAtUserRequest() (shows UI). I would recommend checking quietly because the UI method will always show the latest version. You can always show your own UI.
  3. Look in _updateInfo.Updates for the available versions in your app cast. You can compare it with your currently installed version to see which ones are new and which ones are old.
  4. Call await _sparkle.InitAndBeginDownload(update); with the update you want to download. The download path is provided in the DownloadFinished event.
  5. When it's done downloading, call _sparkle.InstallUpdate(update, _downloadPath);

The "Handle Events Yourself" sample will be very helpful to you: https://github.com/NetSparkleUpdater/NetSparkle/tree/develop/src/NetSparkle.Samples.HandleEventsYourself

Does this work with Avalonia version XYZ?

Right now, we are compatible with version 11. If you need to make changes, you can use your own IUIFactory implementation to fix any issues that come up.

Can I use DSA signatures still?

DSA signatures are not recommended when using NetSparkleUpdater 2.0+. They are considered insecure!

You can still generate/use these signatures, however, using the DSAHelper tool (from this NuGet package or in the source code here). Key generation only works on Windows because .NET Core 3 does not have the proper implementation to generate DSA keys on macOS/Linux; however, you can get DSA signatures for a file on any platform. If you need to generate a DSA public/private key, please use the DSAHelper tool on Windows like this:

netsparkle-dsa /genkey_pair

You can use the DSAHelper to get a signature like this:

netsparkle-dsa /sign_update {YourInstallerPackage.msi} {NetSparkle_PrivateKey_DSA.priv}
Installing the DSA Helper command-line tool
  1. dotnet tool install --global NetSparkleUpdater.Tools.DSAHelper
  2. The tool is now available on your command line as the netsparkle-dsa command
DSA Code

Pass a DSAChecker into your SparkleUpdater constructor rather than an Ed25519Checker.

Things aren't working. Help!

Here are some things you can do to figure out how to get your app running:

  • Make sure you have enabled and debugged your application thoroughly. A great way to do this is to set SparkleUpdater.LogWriter = new LogWriter(LogWriterOutputMode.Console) and then watch your console output while debugging.
  • Look at the NetSparkleUpdater samples by downloading this repo and running the samples. You can even try putting your app cast URL in there and using your public key to debug with the source code!
  • Ask for help in our Gitter
  • Post an issue and wait for someone to respond with assistance

Are you accepting contributions?

Yes! Please help us make this library awesome!

What's the tagging scheme, here?

  • Major.Minor.Patch (Core)
  • Major.Minor.Patch-app-cast-generator
  • Major.Minor.Patch-dsa-helper
  • Major.Minor.Patch-UI-Avalonia
  • Major.Minor.Patch-UI-WinForms
  • Major.Minor.Patch-UI-WPF

Requirements

  • .NET Framework 4.6.2+ | .NET 6+

License

NetSparkle is available under the MIT License.

Contributing

Contributions are ALWAYS welcome! If you see a new feature you'd like to add, please open an issue to talk about it first, then open a PR for that implementation. If there's a bug you find, please open a PR with the fix or file an issue! Thank you!! 😃 You can also join us in our Gitter chat room!

Areas where we could use help/contributions

  • Unit tests for all parts of the project, including UI unit tests, full download tests, etc.
  • Extensive testing/upgrades on macOS/Linux
  • More options in the app cast generator
  • See the issues list for more

Acknowledgements

  • The original NetSparkle library, found at dei79/netsparkle
  • A function for finding the base directory was taken from MIT-licensed WalletWasabi
  • MarkdownSharp is from here
  • We got our starting README layout from MahApps.Metro, an awesome UI framework for WPF

Other Options

An incomplete list of other projects related to software updating that you might want to look at if NetSparkleUpdater doesn't work for you:

Product Compatible and additional computed target framework versions.
.NET net5.0 was computed.  net5.0-windows was computed.  net6.0 is compatible.  net6.0-android was computed.  net6.0-ios was computed.  net6.0-maccatalyst was computed.  net6.0-macos was computed.  net6.0-tvos was computed.  net6.0-windows was computed.  net7.0 is compatible.  net7.0-android was computed.  net7.0-ios was computed.  net7.0-maccatalyst was computed.  net7.0-macos was computed.  net7.0-tvos was computed.  net7.0-windows was computed.  net8.0 is compatible.  net8.0-android was computed.  net8.0-browser was computed.  net8.0-ios was computed.  net8.0-maccatalyst was computed.  net8.0-macos was computed.  net8.0-tvos was computed.  net8.0-windows was computed. 
.NET Core netcoreapp2.0 was computed.  netcoreapp2.1 was computed.  netcoreapp2.2 was computed.  netcoreapp3.0 was computed.  netcoreapp3.1 was computed. 
.NET Standard netstandard2.0 is compatible.  netstandard2.1 was computed. 
.NET Framework net461 was computed.  net462 is compatible.  net463 was computed.  net47 was computed.  net471 was computed.  net472 was computed.  net48 was computed.  net481 was computed. 
MonoAndroid monoandroid was computed. 
MonoMac monomac was computed. 
MonoTouch monotouch was computed. 
Tizen tizen40 was computed.  tizen60 was computed. 
Xamarin.iOS xamarinios was computed. 
Xamarin.Mac xamarinmac was computed. 
Xamarin.TVOS xamarintvos was computed. 
Xamarin.WatchOS xamarinwatchos was computed. 
Compatible target framework(s)
Included target framework(s) (in package)
Learn more about Target Frameworks and .NET Standard.

NuGet packages (5)

Showing the top 5 NuGet packages that depend on NetSparkleUpdater.SparkleUpdater:

Package Downloads
NetSparkleUpdater.UI.WinForms.NetFramework

NetSparkleUpdater/NetSparkle app updater framework with built-in WinForms UI. NetSparkleUpdater/NetSparkle is a C# .NET software update framework that allows you to easily download installer files and update your C# .NET Framework or .NET Core software. Built-in UIs are available for WinForms, WPF, and Avalonia. You provide, somewhere on the internet, an app cast with software version information along with release notes in Markdown or HTML format. The NetSparkle framework then checks for an update in the background, displays the release notes to the user, and lets users download or skip the software update. The framework can also perform silent downloads so that you can present all of the UI yourself or set up your own silent software update system, as allowed by your software architecture. It was inspired by the Sparkle (https://sparkle-project.org/) project for Cocoa developers and the WinSparkle (https://winsparkle.org/) project (a Win32 port).

NetSparkleUpdater.UI.WPF

NetSparkleUpdater/NetSparkle app updater framework with built-in WPF .NET Core and .NET Framework UI. NetSparkleUpdater/NetSparkle is a C# .NET software update framework that allows you to easily download installer files and update your C# .NET Framework or .NET Core software. Built-in UIs are available for WinForms, WPF, and Avalonia. You provide, somewhere on the internet, an XML appcast with software version information along with release notes in Markdown or HTML format. The NetSparkle framework then checks for an update in the background, displays the release notes to the user, and lets users download or skip the software update. The framework can also perform silent downloads so that you can present all of the UI yourself or set up your own silent software update system, as allowed by your software architecture. It was inspired by the Sparkle (https://sparkle-project.org/) project for Cocoa developers and the WinSparkle (https://winsparkle.org/) project (a Win32 port).

NetSparkleUpdater.UI.Avalonia

NetSparkleUpdater/NetSparkle app updater framework with built-in Avalonia UI. NetSparkleUpdater/NetSparkle is a C# .NET software update framework that allows you to easily download installer files and update your C# .NET Framework or .NET Core software. Built-in UIs are available for WinForms, WPF, and Avalonia. You provide, somewhere on the internet, an XML appcast with software version information along with release notes in Markdown or HTML format. The NetSparkle framework then checks for an update in the background, displays the release notes to the user, and lets users download or skip the software update. The framework can also perform silent downloads so that you can present all of the UI yourself or set up your own silent software update system, as allowed by your software architecture. It was inspired by the Sparkle (https://sparkle-project.org/) project for Cocoa developers and the WinSparkle (https://winsparkle.org/) project (a Win32 port).

NetSparkleUpdater.UI.WinForms.NetCore

NetSparkleUpdater/NetSparkle app updater framework with built-in WinForms UI. NetSparkleUpdater/NetSparkle is a C# .NET software update framework that allows you to easily download installer files and update your C# .NET Framework or .NET Core software. Built-in UIs are available for WinForms, WPF, and Avalonia. You provide, somewhere on the internet, an app cast with software version information along with release notes in Markdown or HTML format. The NetSparkle framework then checks for an update in the background, displays the release notes to the user, and lets users download or skip the software update. The framework can also perform silent downloads so that you can present all of the UI yourself or set up your own silent software update system, as allowed by your software architecture. It was inspired by the Sparkle (https://sparkle-project.org/) project for Cocoa developers and the WinSparkle (https://winsparkle.org/) project (a Win32 port).

SystemPerformanceUI.NetSparkleUISelf

NetSparkleUpdater/NetSparkle app updater framework with built-in Avalonia UI. NetSparkleUpdater/NetSparkle is a C# .NET software update framework that allows you to easily download installer files and update your C# .NET Framework or .NET Core software. Built-in UIs are available for WinForms, WPF, and Avalonia. You provide, somewhere on the internet, an XML appcast with software version information along with release notes in Markdown or HTML format. The NetSparkle framework then checks for an update in the background, displays the release notes to the user, and lets users download or skip the software update. The framework can also perform silent downloads so that you can present all of the UI yourself or set up your own silent software update system, as allowed by your software architecture. It was inspired by the Sparkle (https://sparkle-project.org/) project for Cocoa developers and the WinSparkle (https://winsparkle.org/) project (a Win32 port).

GitHub repositories (4)

Showing the top 4 popular GitHub repositories that depend on NetSparkleUpdater.SparkleUpdater:

Repository Stars
stakira/OpenUtau
Open singing synthesis platform / Open source UTAU successor
ChromaControl/ChromaControl
3rd party device lighting support for Razer Synapse.
bcssov/IronyModManager
Mod Manager for Paradox Games. Official Discord: https://discord.gg/t9JmY8KFrV
TheMulhima/Lumafly
A cross platform mod manager for Hollow Knight written in Avalonia.
Version Downloads Last updated
3.0.0-preview20240915001 186 9/15/2024
3.0.0-preview20240914001 82 9/14/2024
3.0.0-preview20240716002 597 7/14/2024
3.0.0-preview20240716001 95 7/6/2024
3.0.0-preview20240613001 138 6/13/2024
3.0.0-preview20240601001 114 6/2/2024
3.0.0-preview20240427001 246 4/27/2024
3.0.0-preview20240424001 59 4/24/2024
3.0.0-preview20240404001 127 4/4/2024
3.0.0-preview20240120001 306 1/20/2024
3.0.0-preview20231207003 304 12/7/2023
3.0.0-preview20231207002 100 12/7/2023
3.0.0-preview20231207 102 12/7/2023
3.0.0-preview20231123 154 11/23/2023
2.3.0 13,509 11/23/2023
2.3.0-preview20231004001 135 10/4/2023
2.3.0-preview20230704001 1,998 7/4/2023
2.3.0-preview20230611002 699 6/12/2023
2.3.0-preview20230611001 187 6/12/2023
2.3.0-preview20230605001 622 6/5/2023
2.3.0-preview20230604001 169 6/4/2023
2.2.3 14,111 6/4/2023
2.2.2 626 5/30/2023
2.2.1 24,065 11/22/2022
2.2.0 1,967 11/18/2022
2.1.4-preview20221106001 117 11/8/2022
2.1.3 2,800 10/23/2022
2.1.3-preview20220927001 306 9/28/2022
2.1.2 11,373 7/10/2022
2.1.1 1,943 6/10/2022
2.1.0 345 6/5/2022
2.1.0-preview20220509001 280 5/9/2022
2.0.12-preview20220420001 821 4/21/2022
2.0.11 13,265 3/4/2022
2.0.10 1,837 2/27/2022
2.0.9 3,164 1/25/2022
2.0.9-preview20220106001 772 1/7/2022
2.0.8 11,893 10/24/2021
2.0.7 4,048 9/12/2021
2.0.7-preview20210808001 826 8/8/2021
2.0.6 4,999 7/11/2021
2.0.6-preview001 922 7/7/2021
2.0.5 2,964 5/9/2021
2.0.4 4,830 4/29/2021
2.0.3 1,259 4/29/2021
2.0.2 1,259 4/26/2021
2.0.1 1,306 4/21/2021
2.0.0 1,320 4/20/2021

See https://github.com/NetSparkleUpdater/NetSparkle/releases for all release information and to file issues/pull requests for this project.