Bump Wasmtime version to 19.0.1. (#303)

* Bump Wasmtime version to 19.0.1.

* Add a publish action for new tags.

* Add release information to README.md.

Closes #5.

.github/workflows/publish.yml

@@ -0,0 +1,27 @@
+# The purpose of this workflow is to publish the packages to NuGet
+# whenever a tag is created.
+
+name: "Publish to NuGet"
+
+on:
+  push:
+    tags:
+    - 'v*'
+
+jobs:
+  publish:
+    name: "Publish NuGet Package"
+    if: github.repository == 'bytecodealliance/wasmtime-dotnet'
+    runs-on: ubuntu-latest
+    env:
+      DevBuild: 'false'
+    steps:
+    - uses: actions/checkout@v3
+    - name: Create NuGet package
+      run: |
+        cd src
+        dotnet pack -c Release /p:Packing=true
+    - name: Publish NuGet Package
+      run: |
+        cd src/bin/Release
+        dotnet nuget push Wasmtime.${GITHUB_REF_NAME:1}.nupkg -k ${{ secrets.NUGET_API_KEY }} -s https://api.nuget.org/v3/index.json

Directory.Build.props

@@ -1,7 +1,7 @@
 <Project>
   <PropertyGroup>
     <DevBuild Condition="'$(DevBuild)'==''">true</DevBuild>
-    <WasmtimeVersion Condition="'$(WasmtimeVersion)'==''">19.0.0</WasmtimeVersion>
+    <WasmtimeVersion Condition="'$(WasmtimeVersion)'==''">19.0.1</WasmtimeVersion>
     <WasmtimeDotnetVersion Condition="'$(WasmtimeDotnetVersion)'==''"></WasmtimeDotnetVersion>
     <WasmtimePackageVersion Condition="'$(DevBuild)'=='true'">$(WasmtimeVersion)$(WasmtimeDotnetVersion)-dev</WasmtimePackageVersion>
     <WasmtimePackageVersion Condition="'$(WasmtimePackageVersion)'==''">$(WasmtimeVersion)$(WasmtimeDotnetVersion)</WasmtimePackageVersion>

README.md

@@ -32,7 +32,8 @@ $ dotnet add package wasmtime
 
 ## Introduction
 
-For this introduction, we'll be using a simple WebAssembly module that imports a `hello` function and exports a `run` function:
+For this introduction, we'll be using a simple WebAssembly module that imports
+a `hello` function and exports a `run` function:
 
 ```wat
 (module
@@ -83,7 +84,8 @@ var run = instance.GetAction("run")!;
 run();
 ```
 
-An `Engine` is created and then a WebAssembly module is loaded from a string in WebAssembly text format.
+An `Engine` is created and then a WebAssembly module is loaded from a string in
+WebAssembly text format.
 
 A `Linker` defines a function called `hello` that simply prints a hello message.
 
@@ -107,7 +109,8 @@ Use `dotnet` to build the repository:
 $ dotnet build Wasmtime.sln
 ```
 
-This will download the latest development snapshot of Wasmtime for your platform.
+This will download the latest development snapshot of Wasmtime for your
+platform.
 
 ### Testing
 
@@ -128,4 +131,36 @@ $ dotnet pack Wasmtime.sln -c Release /p:Packing=true
 
 This will create a `.nupkg` file in `src/bin/Release`.
 
-By default, local builds will use a `-dev` suffix for the package to differentiate between official packages and development packages.
+By default, local builds will use a `-dev` suffix for the package to
+differentiate between official packages and development packages.
+
+### Updating Wasmtime for a release
+
+To update the Wasmtime library used for a new release, change `WasmtimeVersion`
+in `Directory.Build.props`:
+
+```xml
+<WasmtimeVersion Condition="'$(WasmtimeVersion)'==''">$VERSION</WasmtimeVersion>
+```
+
+Additionally, edit `Wasmtime.csproj` to change the `PackageReleaseNotes` to the
+new version:
+
+```xml
+<PackageReleaseNotes>Update Wasmtime to $VERSION.</PackageReleaseNotes>
+```
+
+### Publishing the Wasmtime .NET NuGet package
+
+GitHub actions is used to automatically publish a package to NuGet when a tag
+is pushed to the repository.
+
+To publish a new release, create a release in GitHub and add the relevant
+release notes.
+
+Use a tag of the format `v$VERSION` where `$VERSION` matches the Wasmtime
+version used by the .NET package; ensure the tagged commit matches the last
+commit to make for the release.
+
+When the release is published on GitHub, an action should automatically start
+to build and publish the package to NuGet.

src/Wasmtime.csproj

@@ -20,7 +20,7 @@
     <RepositoryUrl>https://github.com/bytecodealliance/wasmtime-dotnet</RepositoryUrl>
     <PublishRepositoryUrl>true</PublishRepositoryUrl>
     <EmbedUntrackedSources>true</EmbedUntrackedSources>
-    <PackageReleaseNotes>Update Wasmtime to 19.0.0.</PackageReleaseNotes>
+    <PackageReleaseNotes>Update Wasmtime to 19.0.1.</PackageReleaseNotes>
     <Summary>A .NET API for Wasmtime, a standalone WebAssembly runtime</Summary>
     <PackageTags>webassembly, .net, wasm, wasmtime</PackageTags>
     <Title>Wasmtime</Title>