Add support for uploading a coverage badge to gist

src/DotNetReleaser.Tests/MockDevHosting.cs

@@ -30,6 +30,11 @@ public Task<bool> Connect()
         return Task.FromResult(true);
     }
 
+    public Task CreateOrUpdateGist(string gistId, string fileName, string content)
+    {
+        return Task.CompletedTask;
+    }
+
     public Task<List<ReleaseVersion>> GetAllReleaseTags(string user, string repo, string tagPrefix)
     {
         throw new System.NotImplementedException();

src/dotnet-releaser/Configuration/CoverageConfiguration.cs

@@ -11,6 +11,8 @@ public CoverageConfiguration()
     {
         Enable = true;
 
+        BadgeUploadToGist = false;
+        BadgeGistId = "https://gist.github.com";
         Package = "coverlet.collector";
         Version = "6.0.*";
         SingleHit = false;
@@ -36,6 +38,16 @@ public CoverageConfiguration()
     /// </summary>
     public string Package { get; set; }
 
+    /// <summary>
+    /// Gets or sets a boolean indicating if a badge should be uploaded to gist. Default is disabled.
+    /// </summary>
+    public bool BadgeUploadToGist { get; set; }
+
+    /// <summary>
+    /// Gets or sets the gist id
+    /// </summary>
+    public string? BadgeGistId { get; set; }
+
     /// <summary>
     /// Gets or sets the version of the package that will be used for collecting.
     /// </summary>

src/dotnet-releaser/DevHosting/GitHubDevHosting.cs

@@ -72,6 +72,37 @@ public async Task<List<ReleaseVersion>> GetAllReleaseTags(string user, string re
 
         return result;
     }
+
+    public async Task CreateOrUpdateGist(string gistId, string fileName, string content)
+    {
+        var gist = await _client.Gist.Get(gistId);
+        if (gist is null)
+        {
+            _log.Error($"The gist {gistId} for code coverage was not found");
+            return;
+        }
+
+        if (gist.Files.ContainsKey(fileName))
+        {
+            var existingContent = gist.Files[fileName].Content;
+            if (existingContent == content)
+            {
+                _log.Info($"No need to update the gist {gistId} as the content is the same.");
+                return;
+            }
+        }
+        else
+        {
+            _log.Warn($"Cannot update gist {gistId} as it does not contain the required file {fileName}");
+            return;
+        }
+
+        // Update the file
+        GistUpdate gistUpdate = new GistUpdate();
+        //gistUpdate.Files.Add();
+        gistUpdate.Files.Add(fileName, new GistFileUpdate() { NewFileName = fileName, Content = content });
+        await _client.Gist.Edit(gistId, gistUpdate);
+    }
 
     private async Task<List<(RepositoryTag, NuGetVersion)>> GetAllReleaseTagsImpl(string user, string repo, string tagPrefix)
     {

src/dotnet-releaser/IDevHosting.cs

@@ -26,6 +26,8 @@ public interface IDevHosting
 
     Task<bool> Connect();
 
+    Task CreateOrUpdateGist(string gistId, string fileName, string content);
+
     Task<List<ReleaseVersion>> GetAllReleaseTags(string user, string repo, string tagPrefix);
 
     Task<ChangelogCollection?> GetChanges(string user, string repo, string tagPrefix, string version);

src/dotnet-releaser/ReleaserApp.BuildAndTests.cs

@@ -15,7 +15,7 @@ public partial class ReleaserApp
 {
     private List<AssemblyCoverage> _assemblyCoverages;
 
-    private async Task<bool> BuildAndTest(BuildInformation buildInfo)
+    private async Task<bool> BuildAndTest(IDevHosting? devHosting, BuildInformation buildInfo)
     {
         var coverage = _config.Coverage.Enable && _config.Test.Enable;
 
@@ -81,7 +81,13 @@ private async Task<bool> BuildAndTest(BuildInformation buildInfo)
             {
                 if (_config.Coverage.Enable)
                 {
-                    LoadAndDisplayCoverageResults();
+                    var coverageResult = LoadAndDisplayCoverageResults();
+
+                    // Publish badge if requested
+                    if (devHosting is not null)
+                    {
+                        await PublishCoverageToGist(devHosting, buildInfo, coverageResult);
+                    }
                 }
 
                 _logger.LogEndGroup();
@@ -114,7 +120,7 @@ private static string FormatRate(HitCoverage rate)
         return Math.Round(rate.Rate * 100, 2, MidpointRounding.AwayFromZero).ToString("##.00") + "%";
     }
 
-    private void LoadAndDisplayCoverageResults()
+    private HitCoverage LoadAndDisplayCoverageResults()
     {
         LoadCoverageResults();
 
@@ -153,6 +159,8 @@ private void LoadAndDisplayCoverageResults()
         table.Columns[4].Footer = new Text(FormatRate(totalMethodRate));
 
         _logger.InfoMarkup("Coverage Results:", table);
+
+        return totalMethodRate;
     }
 
     private async Task<bool> Build(string projectFile, bool isTestProject)

src/dotnet-releaser/ReleaserApp.Coveralls.cs → src/dotnet-releaser/ReleaserApp.Coverage.cs

@@ -5,13 +5,35 @@
 using System.Linq;
 using System.Net.Http;
 using System.Threading.Tasks;
+using DotNetReleaser.Coverage;
 using DotNetReleaser.Coverage.Coveralls;
 using DotNetReleaser.Helpers;
 
 namespace DotNetReleaser;
 
 public partial class ReleaserApp
 {
+    private async Task PublishCoverageToGist(IDevHosting devHosting, BuildInformation buildInfo, HitCoverage coverage)
+    {
+        if (!_config.Coverage.BadgeUploadToGist) return;
+
+        var gistId = _config.Coverage.BadgeGistId;
+        if (string.IsNullOrWhiteSpace(gistId))
+        {
+            Warn("The 'coverage.badge_gist_id' is not set in the configuration file. The coverage badge will not be uploaded to a gist.");
+            return;
+        }
+
+        var rate = (int)(Math.Round((double)coverage.Rate) * 100);
+        var svg = $"""
+                  <svg xmlns="http://www.w3.org/2000/svg" width="99" height="20"><linearGradient id="a" x2="0" y2="100%"><stop offset="0" stop-color="#bbb" stop-opacity=".1"/><stop offset="1" stop-opacity=".1"/></linearGradient><rect rx="3" width="99" height="20" fill="#555"/><rect rx="3" x="63" width="36" height="20" fill="#97CA00"/><path fill="#97CA00" d="M63 0h4v20h-4z"/><rect rx="3" width="99" height="20" fill="url(#a)"/><g fill="#fff" text-anchor="middle" font-family="DejaVu Sans,Verdana,Geneva,sans-serif" font-size="11"><text x="32.5" y="15" fill="#010101" fill-opacity=".3">coverage</text><text x="32.5" y="14">coverage</text><text x="80" y="15" fill="#010101" fill-opacity=".3">{rate:##}%</text><text x="80" y="14">{rate:##}%</text></g></svg>
+                  """;
+
+        var fileName = $"dotnet-releaser-coverage-badge-{_config.GitHub.User}-{_config.GitHub.Repo}.svg";
+        Info($"Updating coverage badge with {rate:##}% result to gist {gistId} and file {fileName}");
+        await devHosting.CreateOrUpdateGist(gistId, fileName, svg);
+    }
+
     private async Task PublishCoveralls(IDevHosting devHosting, BuildInformation buildInfo)
     {
         if (!_config.Coveralls.Publish || _assemblyCoverages.Count == 0) return;

src/dotnet-releaser/ReleaserApp.cs

@@ -353,7 +353,7 @@ private async Task<bool> RunImpl(string configurationFile, BuildKind buildKind,
         // ------------------------------------------------------------------
         // Build Projects (debug/release)
         // ------------------------------------------------------------------
-        if (!await BuildAndTest(buildInformation)) return false;
+        if (!await BuildAndTest(devHosting, buildInformation)) return false;
 
         // ------------------------------------------------------------------
         // Build NuGet package