70 lines
2.1 KiB
C#
70 lines
2.1 KiB
C#
namespace BizHawk.SrcGen.VersionInfo;
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using System.Diagnostics;
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using System.IO;
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using System.Linq;
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[Generator]
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public class VersionInfoGenerator : IIncrementalGenerator
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{
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public void Initialize(IncrementalGeneratorInitializationContext context)
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=> context.RegisterSourceOutput(context.CompilationProvider, Execute);
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private static string? ExecuteGitWithArguments(string arguments)
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{
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var startInfo = new ProcessStartInfo("git", arguments)
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{
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RedirectStandardOutput = true,
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CreateNoWindow = true,
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UseShellExecute = false, // this is just required for visual studio (:
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};
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try
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{
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using Process git = Process.Start(startInfo) ?? throw new Exception("Failed to start git process");
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git.WaitForExit();
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return git.StandardOutput.ReadLine();
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}
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#if DEBUG
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catch (Exception e)
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{
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return $"{e.GetType()}: {e.Message}";
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}
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#else
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catch (Exception)
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{
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return null;
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}
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#endif
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}
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public void Execute(SourceProductionContext context, Compilation compilation)
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{
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// Finds the current project directory in order to pass to git commands.
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// This is written in a way to (hopefully) work both for build and IDE analyzers
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// FIXME: This should probably be done in a better way, but I haven't found any
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var projectDir = Path.GetDirectoryName(compilation.SyntaxTrees
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.First(static x => x.HasCompilationUnitRoot && x.FilePath.Contains("BizHawk.Common"))
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.FilePath)!;
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var rev = ExecuteGitWithArguments($"-C {projectDir} rev-list HEAD --count") ?? string.Empty;
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var branch = ExecuteGitWithArguments($"-C {projectDir} rev-parse --abbrev-ref HEAD") ?? "master";
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var hash = ExecuteGitWithArguments($"-C {projectDir} log -1 --format=\"%H\"") ?? "0000000000000000000000000000000000000000";
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// Generated source code
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string source = $@"namespace BizHawk.Common
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{{
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public static partial class VersionInfo
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{{
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public const string SVN_REV = ""{rev}"";
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public const string GIT_BRANCH = ""{branch}"";
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public const string GIT_HASH = ""{hash}"";
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public const string GIT_SHORTHASH = ""{hash.Substring(startIndex: 0, length: 9)}"";
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}}
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}}
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";
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// Add the source code to the compilation
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context.AddSource("VersionInfo.g.cs", source);
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}
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}
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