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diff --git a/docs/technical/mod-package.md b/docs/technical/mod-package.md new file mode 100644 index 00000000..43682bfb --- /dev/null +++ b/docs/technical/mod-package.md @@ -0,0 +1,371 @@ +← [SMAPI](../README.md) + +The **mod build package** is an open-source NuGet package which automates the MSBuild configuration +for SMAPI mods and related tools. The package is fully compatible with Linux, Mac, and Windows. + +## Contents +* [Use](#use) +* [Features](#features) + * [Detect game path](#detect-game-path) + * [Add assembly references](#add-assembly-references) + * [Copy files into the `Mods` folder and create release zip](#copy-files-into-the-mods-folder-and-create-release-zip) + * [Launch or debug game](#launch-or-debug-game) + * [Preconfigure common settings](#preconfigure-common-settings) + * [Add code warnings](#add-code-warnings) +* [Code warnings](#code-warnings) +* [Special cases](#special-cases) + * [Custom game path](#custom-game-path) + * [Non-mod projects](#non-mod-projects) +* [For SMAPI developers](#for-smapi-developers) +* [Release notes](#release-notes) + +## Use +1. Create an empty library project. +2. Reference the [`Pathoschild.Stardew.ModBuildConfig` NuGet package](https://www.nuget.org/packages/Pathoschild.Stardew.ModBuildConfig). +3. [Write your code](https://stardewvalleywiki.com/Modding:Creating_a_SMAPI_mod). +4. Compile on any platform. +5. Run the game to play with your mod. + +## Features +The package automatically makes the changes listed below. In some cases you can configure how it +works by editing your mod's `.csproj` file, and adding the given properties between the first +`<PropertyGroup>` and `</PropertyGroup>` tags. + +### Detect game path +The package finds your game folder by scanning the default install paths and Windows registry. It +adds two MSBuild properties for use in your `.csproj` file if needed: + +property | description +-------- | ----------- +`$(GamePath)` | The absolute path to the detected game folder. +`$(GameExecutableName)` | The game's executable name for the current OS (`Stardew Valley` on Windows, or `StardewValley` on Linux/Mac). + +If you get a build error saying it can't find your game, see [_set the game path_](#set-the-game-path). + +### Add assembly references +The package adds assembly references to SMAPI, Stardew Valley, xTile, and MonoGame (Linux/Mac) or XNA +Framework (Windows). It automatically adjusts depending on which OS you're compiling it on. + +The assemblies aren't copied to the build output, since mods loaded by SMAPI won't need them. For +non-mod projects like unit tests, you can set this property: +```xml +<CopyModReferencesToBuildOutput>true</CopyModReferencesToBuildOutput> +``` + +If your mod uses [Harmony](https://github.com/pardeike/Harmony) (not recommended for most mods), +the package can add a reference to SMAPI's Harmony DLL for you: +```xml +<EnableHarmony>true</EnableHarmony> +``` + +### Copy files into the `Mods` folder and create release zip +<dl> +<dt>Files considered part of your mod</dt> +<dd> + +These files are selected by default: `manifest.json`, +[`i18n` files](https://stardewvalleywiki.com/Modding:Translations) (if any), the `assets` folder +(if any), and all files in the build output. You can select custom files by [adding them to the +build output](https://stackoverflow.com/a/10828462/262123). (If your project references another mod, +make sure the reference is [_not_ marked 'copy local'](https://msdn.microsoft.com/en-us/library/t1zz5y8c(v=vs.100).aspx).) + +You can deselect a file by removing it from the build output. For a default file, you can set the +property below to a comma-delimited list of regex patterns to ignore. For crossplatform +compatibility, you should replace path delimiters with `[/\\]`. + +```xml +<IgnoreModFilePatterns>\.txt$, \.pdf$, assets[/\\]paths.png</IgnoreModFilePatterns> +``` + +</dd> +<dt>Copy files into the `Mods` folder</dt> +<dd> + +The package copies the selected files into your game's `Mods` folder when you rebuild the code, +with a subfolder matching the mod's project name. + +You can change the folder name: +```xml +<ModFolderName>YourModName</ModFolderName> +``` + +Or disable deploying the files: +```xml +<EnableModDeploy>false</EnableModDeploy> +``` + +</dd> +<dt>Create release zip</dt> +<dd> + +The package adds a zip file in your project's `bin` folder when you rebuild the code, in the format +recommended for sites like Nexus Mods. The zip filename can be changed using `ModFolderName` above. + +You can change the folder path where the zip is created: +```xml +<ModZipPath>$(SolutionDir)\_releases</ModZipPath> +``` + +Or disable zip creation: +```xml +<EnableModZip>false</EnableModZip> +``` + +</dd> +</dl> + +### Launch or debug game +On Windows only, the package configures Visual Studio so you can launch the game and attach a +debugger using _Debug > Start Debugging_ or _Debug > Start Without Debugging_. This lets you [set +breakpoints](https://docs.microsoft.com/en-us/visualstudio/debugger/using-breakpoints?view=vs-2019) +in your code while the game is running, or [make simple changes to the mod code without needing to +restart the game](https://docs.microsoft.com/en-us/visualstudio/debugger/edit-and-continue?view=vs-2019). + +This is disabled on Linux/Mac due to limitations with the Mono wrapper. + +To disable game debugging (only needed for some non-mod projects): + +```xml +<EnableGameDebugging>false</EnableGameDebugging> +``` + +### Preconfigure common settings +The package automatically enables PDB files, so error logs show line numbers for simpler debugging. + +For projects using the simplified `.csproj` format, it also enables the GAC (to support XNA +Framework) and sets the build to x86 mode (to avoid 'mismatch between the processor architecture' warnings due to + the game being x86). + +### Add code warnings +The package runs code analysis on your mod and raises warnings for some common errors or pitfalls. +See [_code warnings_](#code-warnings) for more info. + +## Code warnings +### Overview +The NuGet package adds code warnings in Visual Studio specific to Stardew Valley. For example: + + +You can hide the warnings using the warning ID (shown under 'code' in the Error List). See... +* [for specific code](https://docs.microsoft.com/en-us/dotnet/csharp/language-reference/preprocessor-directives/preprocessor-pragma-warning); +* for a method using this attribute: + ```cs + [System.Diagnostics.CodeAnalysis.SuppressMessage("SMAPI.CommonErrors", "AvoidNetField")] + ``` +* for an entire project: + 1. Expand the _References_ node for the project in Visual Studio. + 2. Right-click on _Analyzers_ and choose _Open Active Rule Set_. + 4. Expand _StardewModdingAPI.ModBuildConfig.Analyzer_ and uncheck the warnings you want to hide. + +See below for help with each specific warning. + +### Avoid implicit net field cast +Warning text: +> This implicitly converts '{{expression}}' from {{net type}} to {{other type}}, but +> {{net type}} has unintuitive implicit conversion rules. Consider comparing against the actual +> value instead to avoid bugs. + +Stardew Valley uses net types (like `NetBool` and `NetInt`) to handle multiplayer sync. These types +can implicitly convert to their equivalent normal values (like `bool x = new NetBool()`), but their +conversion rules are unintuitive and error-prone. For example, +`item?.category == null && item?.category != null` can both be true at once, and +`building.indoors != null` can be true for a null value. + +Suggested fix: +* Some net fields have an equivalent non-net property like `monster.Health` (`int`) instead of + `monster.health` (`NetInt`). The package will add a separate [AvoidNetField](#avoid-net-field) warning for + these. Use the suggested property instead. +* For a reference type (i.e. one that can contain `null`), you can use the `.Value` property: + ```c# + if (building.indoors.Value == null) + ``` + Or convert the value before comparison: + ```c# + GameLocation indoors = building.indoors; + if(indoors == null) + // ... + ``` +* For a value type (i.e. one that can't contain `null`), check if the object is null (if applicable) + and compare with `.Value`: + ```cs + if (item != null && item.category.Value == 0) + ``` + +### Avoid net field +Warning text: +> '{{expression}}' is a {{net type}} field; consider using the {{property name}} property instead. + +Your code accesses a net field, which has some unusual behavior (see [AvoidImplicitNetFieldCast](#avoid-implicit-net-field-cast)). +This field has an equivalent non-net property that avoids those issues. + +Suggested fix: access the suggested property name instead. + +### Avoid obsolete field +Warning text: +> The '{{old field}}' field is obsolete and should be replaced with '{{new field}}'. + +Your code accesses a field which is obsolete or no longer works. Use the suggested field instead. + +## Special cases +### Custom game path +The package usually detects where your game is installed automatically. If it can't find your game +or you have multiple installs, you can specify the path yourself. There's two ways to do that: + +* **Option 1: global game path (recommended).** + _This will apply to every project that uses the package._ + + 1. Get the full folder path containing the Stardew Valley executable. + 2. Create this file: + + platform | path + --------- | ---- + Linux/Mac | `~/stardewvalley.targets` + Windows | `%USERPROFILE%\stardewvalley.targets` + + 3. Save the file with this content: + + ```xml + <Project xmlns="http://schemas.microsoft.com/developer/msbuild/2003"> + <PropertyGroup> + <GamePath>PATH_HERE</GamePath> + </PropertyGroup> + </Project> + ``` + + 4. Replace `PATH_HERE` with your game path. + +* **Option 2: path in the project file.** + _You'll need to do this for each project that uses the package._ + + 1. Get the folder path containing the Stardew Valley `.exe` file. + 2. Add this to your `.csproj` file under the `<Project` line: + + ```xml + <PropertyGroup> + <GamePath>PATH_HERE</GamePath> + </PropertyGroup> + ``` + + 3. Replace `PATH_HERE` with your custom game install path. + +The configuration will check your custom path first, then fall back to the default paths (so it'll +still compile on a different computer). + +You access the game path via `$(GamePath)` in MSBuild properties, if you need to reference another +file in the game folder. + +### Non-mod projects +You can use the package in non-mod projects too (e.g. unit tests or framework DLLs). Just disable +the mod-related package features: + +```xml +<EnableGameDebugging>false</EnableGameDebugging> +<EnableModDeploy>false</EnableModDeploy> +<EnableModZip>false</EnableModZip> +``` + +If you need to copy the referenced DLLs into your build output, add this too: +```xml +<CopyModReferencesToBuildOutput>true</CopyModReferencesToBuildOutput> +``` + +## For SMAPI developers +The mod build package consists of three projects: + +project | purpose +------------------------------------------------- | ---------------- +`StardewModdingAPI.ModBuildConfig` | Configures the build (references, deploying the mod files, setting up debugging, etc). +`StardewModdingAPI.ModBuildConfig.Analyzer` | Adds C# analyzers which show code warnings in Visual Studio. +`StardewModdingAPI.ModBuildConfig.Analyzer.Tests` | Unit tests for the C# analyzers. + +To prepare a build of the NuGet package: +1. Install the [NuGet CLI](https://docs.microsoft.com/en-us/nuget/install-nuget-client-tools#nugetexe-cli). +1. Change the version and release notes in `package.nuspec`. +2. Rebuild the solution in _Release_ mode. +3. Open a terminal in the `bin/Pathoschild.Stardew.ModBuildConfig` package and run this command: + ```bash + nuget.exe pack + ``` + +That will create a `Pathoschild.Stardew.ModBuildConfig-<version>.nupkg` file in the same directory +which can be uploaded to NuGet or referenced directly. + +## Release notes +### Upcoming release +* Updated for SMAPI 3.0 and Stardew Valley 1.4. +* Added automatic support for `assets` folders. +* Added `$(GameExecutableName)` MSBuild variable. +* Added support for projects using the simplified `.csproj` format: + * platform target is now set to x86 automatically to avoid mismatching platform target warnings; + * added GAC to assembly search paths to fix references to XNA Framework. +* Added option to disable game debugging config. +* Added `.pdb` files to builds by default (to enable line numbers in error stack traces). +* Added optional Harmony reference. +* Fixed `Newtonsoft.Json.pdb` included in release zips when Json.NET is referenced directly. +* Fixed `<IgnoreModFilePatterns>` not working for `i18n` files. +* Dropped support for older versions of SMAPI and Visual Studio. + +### 2.2 +* Added support for SMAPI 2.8+ (still compatible with earlier versions). +* Added default game paths for 32-bit Windows. +* Fixed valid manifests marked invalid in some cases. + +### 2.1 +* Added support for Stardew Valley 1.3. +* Added support for non-mod projects. +* Added C# analyzers to warn about implicit conversions of Netcode fields in Stardew Valley 1.3. +* Added option to ignore files by regex pattern. +* Added reference to new SMAPI DLL. +* Fixed some game paths not detected by NuGet package. + +### 2.0.2 +* Fixed compatibility issue on Linux. + +### 2.0.1 +* Fixed mod deploy failing to create subfolders if they don't already exist. + +### 2.0 +* Added: mods are now copied into the `Mods` folder automatically (configurable). +* Added: release zips are now created automatically in your build output folder (configurable). +* Added: mod deploy and release zips now exclude Json.NET automatically, since it's provided by SMAPI. +* Added mod's version to release zip filename. +* Improved errors to simplify troubleshooting. +* Fixed release zip not having a mod folder. +* Fixed release zip failing if mod name contains characters that aren't valid in a filename. + +### 1.7.1 +* Fixed issue where i18n folders were flattened. +* The manifest/i18n files in the project now take precedence over those in the build output if both + are present. + +### 1.7 +* Added option to create release zips on build. +* Added reference to XNA's XACT library for audio-related mods. + +### 1.6 +* Added support for deploying mod files into `Mods` automatically. +* Added a build error if a game folder is found, but doesn't contain Stardew Valley or SMAPI. + +### 1.5 +* Added support for setting a custom game path globally. +* Added default GOG path on Mac. + +### 1.4 +* Fixed detection of non-default game paths on 32-bit Windows. +* Removed support for SilVerPLuM (discontinued). +* Removed support for overriding the target platform (no longer needed since SMAPI crossplatforms + mods automatically). + +### 1.3 +* Added support for non-default game paths on Windows. + +### 1.2 +* Exclude game binaries from mod build output. + +### 1.1 +* Added support for overriding the target platform. + +### 1.0 +* Initial release. +* Added support for detecting the game path automatically. +* Added support for injecting XNA/MonoGame references automatically based on the OS. +* Added support for mod builders like SilVerPLuM. |