Initial provider implementation (#18)

This brings over the initial buildx prototype from pulumi/pulumi-docker
and fixes various build and release issues.

sdk/dotnet/Inputs/CacheToGitHubActionsArgs.cs

@@ -0,0 +1,77 @@
+// *** WARNING: this file was generated by pulumi. ***
+// *** Do not edit by hand unless you're certain you know what you are doing! ***
+
+using System;
+using System.Collections.Generic;
+using System.Collections.Immutable;
+using System.Threading.Tasks;
+using Pulumi.Serialization;
+
+namespace Pulumi.DockerBuild.Inputs
+{
+
+    public sealed class CacheToGitHubActionsArgs : global::Pulumi.ResourceArgs
+    {
+        /// <summary>
+        /// Ignore errors caused by failed cache exports.
+        /// </summary>
+        [Input("ignoreError")]
+        public Input<bool>? IgnoreError { get; set; }
+
+        /// <summary>
+        /// The cache mode to use. Defaults to `min`.
+        /// </summary>
+        [Input("mode")]
+        public Input<Pulumi.DockerBuild.CacheMode>? Mode { get; set; }
+
+        /// <summary>
+        /// The scope to use for cache keys. Defaults to `buildkit`.
+        /// 
+        /// This should be set if building and caching multiple images in one
+        /// workflow, otherwise caches will overwrite each other.
+        /// </summary>
+        [Input("scope")]
+        public Input<string>? Scope { get; set; }
+
+        [Input("token")]
+        private Input<string>? _token;
+
+        /// <summary>
+        /// The GitHub Actions token to use. This is not a personal access tokens
+        /// and is typically generated automatically as part of each job.
+        /// 
+        /// Defaults to `$ACTIONS_RUNTIME_TOKEN`, although a separate action like
+        /// `crazy-max/ghaction-github-runtime` is recommended to expose this
+        /// environment variable to your jobs.
+        /// </summary>
+        public Input<string>? Token
+        {
+            get => _token;
+            set
+            {
+                var emptySecret = Output.CreateSecret(0);
+                _token = Output.Tuple<Input<string>?, int>(value, emptySecret).Apply(t => t.Item1);
+            }
+        }
+
+        /// <summary>
+        /// The cache server URL to use for artifacts.
+        /// 
+        /// Defaults to `$ACTIONS_RUNTIME_URL`, although a separate action like
+        /// `crazy-max/ghaction-github-runtime` is recommended to expose this
+        /// environment variable to your jobs.
+        /// </summary>
+        [Input("url")]
+        public Input<string>? Url { get; set; }
+
+        public CacheToGitHubActionsArgs()
+        {
+            IgnoreError = false;
+            Mode = Pulumi.DockerBuild.CacheMode.Min;
+            Scope = Utilities.GetEnv("buildkit") ?? "";
+            Token = Utilities.GetEnv("ACTIONS_RUNTIME_TOKEN") ?? "";
+            Url = Utilities.GetEnv("ACTIONS_RUNTIME_URL") ?? "";
+        }
+        public static new CacheToGitHubActionsArgs Empty => new CacheToGitHubActionsArgs();
+    }
+}