Send a tweet when a new package is releases

.github/workflows/test-build.yml

@@ -29,4 +29,8 @@ jobs:
     - name: Build
       env:
         GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        TWITTER_ACCESS_TOKEN: ${{ secrets.TWITTER_ACCESS_TOKEN }}
+        TWITTER_ACCESS_TOKEN_SECRET: ${{ secrets.TWITTER_ACCESS_TOKEN_SECRET }}
+        TWITTER_CONSUMER_API_KEY: ${{ secrets.TWITTER_CONSUMER_API_KEY }}
+        TWITTER_CONSUMER_API_SECRET: ${{ secrets.TWITTER_CONSUMER_API_SECRET }}
       run: ./build.sh ${{ github.event.inputs.target }}

tools/build/BuildDefinition.cs

@@ -172,6 +172,20 @@ public static void Publish(Options options, GitVersion version, NuGetPackage pac
             }
         }
 
+        public static async Task TweetRelease(GitVersion version)
+        {
+            var twitterClient = new TwitterProvider(
+                consumerKey: Environment.GetEnvironmentVariable("TWITTER_CONSUMER_API_KEY") ?? throw new InvalidOperationException("Please set the TWITTER_CONSUMER_API_KEY environment variable."),
+                consumerKeySecret: Environment.GetEnvironmentVariable("TWITTER_CONSUMER_API_SECRET") ?? throw new InvalidOperationException("Please set the TWITTER_CONSUMER_API_SECRET environment variable."),
+                accessToken: Environment.GetEnvironmentVariable("TWITTER_ACCESS_TOKEN") ?? throw new InvalidOperationException("Please set the TWITTER_ACCESS_TOKEN environment variable."),
+                accessTokenSecret: Environment.GetEnvironmentVariable("TWITTER_ACCESS_TOKEN_SECRET") ?? throw new InvalidOperationException("Please set the TWITTER_ACCESS_TOKEN_SECRET environment variable.")
+            );
+
+            var message = $"YamlDotNet {version.NuGetVersion} has just been released! https://github.com/aaubry/YamlDotNet/releases/tag/v{version.NuGetVersion}";
+            var result = await twitterClient.Tweet(message);
+            WriteVerbose(result);
+        }
+
         public static ScaffoldedRelease ScaffoldReleaseNotes(GitVersion version, PreviousReleases releases)
         {
             if (version.IsPreRelease)
@@ -459,12 +473,18 @@ internal class LoggerHttpHandler : HttpClientHandler
         protected override async Task<HttpResponseMessage> SendAsync(HttpRequestMessage request, CancellationToken cancellationToken)
         {
             var requestText = await request.Content.ReadAsStringAsync();
-            WriteVerbose($"> {request.Method} {request.RequestUri}\n{requestText}\n".Replace("\n", "\n> "));
+            var requestHeaders = request.Headers.Concat(request.Content.Headers)
+                .Select(h => $"\n{h.Key}: {string.Join(", ", h.Value)}");
+
+            WriteVerbose($"> {request.Method} {request.RequestUri}{string.Concat(requestHeaders)}\n\n{requestText}\n".Replace("\n", "\n> "));
 
             var response = await base.SendAsync(request, cancellationToken);
 
             var responseText = await response.Content.ReadAsStringAsync();
-            WriteVerbose($"< {response.StatusCode}\n{responseText}\n".Replace("\n", "\n< "));
+            var responseHeaders = response.Headers.Concat(response.Content.Headers)
+                .Select(h => $"\n{h.Key}: {string.Join(", ", h.Value)}");
+
+            WriteVerbose($"< {(int)response.StatusCode} {response.ReasonPhrase}{string.Concat(responseHeaders)}\n\n{responseText}\n".Replace("\n", "\n< "));
 
             return response;
         }

tools/build/Program.cs

@@ -158,6 +158,7 @@ static int Main(string[] args)
                             WriteInformation("Publishable build detected");
                             targets.Add(nameof(BuildDefinition.SetBuildVersion));
                             targets.Add(nameof(BuildDefinition.Publish));
+                            targets.Add(nameof(BuildDefinition.TweetRelease));
                         }
                         else
                         {

tools/build/TwitterProvider.cs

@@ -0,0 +1,136 @@
+// Stolen from https://github.com/cake-contrib/Cake.Twitter
+
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Net.Http;
+using System.Security.Cryptography;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace build
+{
+    // The code within this TwitterProvider has been based almost exclusively on the work that was done by Danny Tuppeny
+    // based on this blog post:
+    // https://blog.dantup.com/2016/07/simplest-csharp-code-to-post-a-tweet-using-oauth/
+    /// <summary>
+    /// Contains functionality related to Twitter API
+    /// </summary>
+    internal sealed class TwitterProvider
+    {
+        const string TwitterApiBaseUrl = "https://api.twitter.com/1.1/";
+        readonly string consumerKey, consumerKeySecret, accessToken, accessTokenSecret;
+        readonly HMACSHA1 sigHasher;
+        readonly DateTime epochUtc = new DateTime(1970, 1, 1, 0, 0, 0, DateTimeKind.Utc);
+
+        /// <summary>
+        /// Creates an object for sending tweets to Twitter using Single-user OAuth.
+        ///
+        /// Get your access keys by creating an app at apps.twitter.com then visiting the
+        /// "Keys and Access Tokens" section for your app. They can be found under the
+        /// "Your Access Token" heading.
+        /// </summary>
+        public TwitterProvider(string consumerKey, string consumerKeySecret, string accessToken, string accessTokenSecret)
+        {
+            this.consumerKey = consumerKey;
+            this.consumerKeySecret = consumerKeySecret;
+            this.accessToken = accessToken;
+            this.accessTokenSecret = accessTokenSecret;
+
+            sigHasher = new HMACSHA1(new ASCIIEncoding().GetBytes(string.Format("{0}&{1}", consumerKeySecret, accessTokenSecret)));
+        }
+
+        /// <summary>
+        /// Sends a tweet with the supplied text and returns the response from the Twitter API.
+        /// </summary>
+        public Task<string> Tweet(string text)
+        {
+            var data = new Dictionary<string, string> {
+                { "status", text },
+                { "trim_user", "1" }
+            };
+
+            return SendRequest("statuses/update.json", data);
+        }
+
+        Task<string> SendRequest(string url, Dictionary<string, string> data)
+        {
+            var fullUrl = TwitterApiBaseUrl + url;
+
+            // Timestamps are in seconds since 1/1/1970.
+            var timestamp = (int)((DateTime.UtcNow - epochUtc).TotalSeconds);
+
+            // Add all the OAuth headers we'll need to use when constructing the hash.
+            data.Add("oauth_consumer_key", consumerKey);
+            data.Add("oauth_signature_method", "HMAC-SHA1");
+            data.Add("oauth_timestamp", timestamp.ToString());
+            data.Add("oauth_nonce", "a"); // Required, but Twitter doesn't appear to use it, so "a" will do.
+            data.Add("oauth_token", accessToken);
+            data.Add("oauth_version", "1.0");
+
+            // Generate the OAuth signature and add it to our payload.
+            data.Add("oauth_signature", GenerateSignature(fullUrl, data));
+
+            // Build the OAuth HTTP Header from the data.
+            string oAuthHeader = GenerateOAuthHeader(data);
+
+            // Build the form data (exclude OAuth stuff that's already in the header).
+            var formData = new FormUrlEncodedContent(data.Where(kvp => !kvp.Key.StartsWith("oauth_")));
+
+            return SendRequest(fullUrl, oAuthHeader, formData);
+        }
+
+        /// <summary>
+        /// Generate an OAuth signature from OAuth header values.
+        /// </summary>
+        string GenerateSignature(string url, Dictionary<string, string> data)
+        {
+            var sigString = string.Join(
+              "&",
+              data
+                .Union(data)
+                .Select(kvp => string.Format("{0}={1}", Uri.EscapeDataString(kvp.Key), Uri.EscapeDataString(kvp.Value)))
+                .OrderBy(s => s)
+            );
+
+            var fullSigData = string.Format(
+              "{0}&{1}&{2}",
+              "POST",
+              Uri.EscapeDataString(url),
+              Uri.EscapeDataString(sigString.ToString())
+            );
+
+            return Convert.ToBase64String(sigHasher.ComputeHash(new ASCIIEncoding().GetBytes(fullSigData.ToString())));
+        }
+
+        /// <summary>
+        /// Generate the raw OAuth HTML header from the values (including signature).
+        /// </summary>
+        string GenerateOAuthHeader(Dictionary<string, string> data)
+        {
+            return "OAuth " + string.Join(
+              ", ",
+              data
+                .Where(kvp => kvp.Key.StartsWith("oauth_"))
+                .Select(kvp => string.Format("{0}=\"{1}\"", Uri.EscapeDataString(kvp.Key), Uri.EscapeDataString(kvp.Value)))
+                .OrderBy(s => s)
+            );
+        }
+
+        /// <summary>
+        /// Send HTTP Request and return the response.
+        /// </summary>
+        async Task<string> SendRequest(string fullUrl, string oAuthHeader, FormUrlEncodedContent formData)
+        {
+            using (var http = new HttpClient())
+            {
+                http.DefaultRequestHeaders.Add("Authorization", oAuthHeader);
+
+                var httpResp = await http.PostAsync(fullUrl, formData);
+                var respBody = await httpResp.Content.ReadAsStringAsync();
+
+                return respBody;
+            }
+        }
+    }
+}