(maint) added a real simple Cake file

to build the image and run tests

.config/dotnet-tools.json

@@ -0,0 +1,12 @@
+{
+  "version": 1,
+  "isRoot": true,
+  "tools": {
+    "cake.tool": {
+      "version": "1.1.0",
+      "commands": [
+        "dotnet-cake"
+      ]
+    }
+  }
+}

.gitignore

@@ -0,0 +1,2 @@
+tools/
+.history/

README.md

@@ -94,6 +94,14 @@ It is also possible to run this action locally:
 
   `docker run --rm -e GITHUB_REPOSITORY=nils-a/Cake.7zip -e INPUT_TARGET_BRANCH=develop -e INPUT_TOKEN=your-github-api-token dependabot-cake:develop`
 
+## Cake targets
+
+* `Build-Image` Creates the image.
+  * `imageName=some-image-name` to set the image name. Default: `dependabot-cake`
+* `Run-Test` Runs a container off the image locally. Settings:
+  * `--test-RepositoryName=owner/repo` to set a repository. Default: `nils-a/Cake.7zip`
+  * `--test-RepositoryBranch=branch` to set a branch. Default: `develop`
+  * Environment variable `INPUT_TOKEN` must be set to a personal access token.
 
 ## Maintainers
 

build.cake

@@ -0,0 +1,72 @@
+#tool dotnet:?package=GitVersion.Tool&version=5.6.8
+#addin nuget:?package=Cake.Docker&version=1.0.0
+
+///////////////////////////////////////////////////////////////////////////////
+// ARGUMENTS
+///////////////////////////////////////////////////////////////////////////////
+
+var target = Argument("target", "Default");
+var imageName = Argument("imageName", "dependabot-cake");
+
+// test
+var testRepositoryName = Argument("test-RepositoryName", "nils-a/Cake.7zip");
+var testRepositoryBranch = Argument("test-RepositoryBranch", "develop");
+
+///////////////////////////////////////////////////////////////////////////////
+// TASKS
+///////////////////////////////////////////////////////////////////////////////
+
+var imageFullTag = "";
+Task("Calculate-Image-Tag")
+   .Does(() =>
+{
+   var version = GitVersion();
+   imageFullTag = $"{imageName}:{version.SemVer}";
+   Information($"calculated tag for image: {imageFullTag}");
+});
+
+
+Task("Build-Image")
+   .IsDependentOn("Calculate-Image-Tag")
+   .Does(() =>
+{
+   DockerBuild(new DockerImageBuildSettings 
+   {
+      Tag = new[] {imageFullTag},
+   }, "src");
+});
+
+Task("Run-Test")
+   .IsDependentOn("Calculate-Image-Tag")
+   .IsDependentOn("Build-Image")
+   .Does(() =>
+{
+   if(string.IsNullOrEmpty(EnvironmentVariable("INPUT_TOKEN")))
+   {
+      throw new ArgumentException("'INPUT_TOKEN' not set. Please set INPUT_TOKEN to your GitHub pat");
+   } 
+
+   var output = DockerRun(new DockerContainerRunSettings
+   {
+      Env = new string [] 
+      {
+          $"GITHUB_REPOSITORY={testRepositoryName}",
+          $"INPUT_TARGET_BRANCH={testRepositoryBranch}",
+          $"INPUT_TOKEN",
+      },
+      Rm = true,
+   },
+   imageFullTag,
+   "");
+
+   Information(output);
+});
+
+
+
+Task("Default")
+.Does(() => {
+   Warning("Currently there is no default. Chose a better target!");
+});
+
+RunTarget(target);