ln.build/ln.build/CIJob.cs

using System;
using System.Collections.Generic;
using System.IO;
using System.Net.Http;
using System.Text;
using ln.build.commands;
using ln.build.repositories;
using ln.json;
using ln.logging;
using ln.threading;

namespace ln.build
{
    public class CIJob : PoolJob
    {
        static HttpClient httpClient = new HttpClient();

        public string JobID { get; } = Guid.NewGuid().ToString("N");
        public string RepositoryURL { get; }
        public string WorkingDirectory { get; set; }
        public CIService CurrentCIService { get; set; }

        public Logger Logger { get; private set; }

        public CommandEnvironment Environment { get; }

        public RepositoryInterface RepositoryInterface { get; set; }

        List<PipeLine> pipeLines = new List<PipeLine>();
        
        public BuildState BuildState { get; private set; }

        Dictionary<string,MemoryStream> logStreams = new Dictionary<string, MemoryStream>();
        Dictionary<string,Logger> logStreamLoggers = new Dictionary<string, Logger>();

        public CIJob(string repositoryURL)
        {
            WorkingDirectory = Path.Combine(Path.GetTempPath(), JobID);
            Logger = new Logger(new FileLogger(Path.Combine(Path.GetTempPath(), String.Format("{0}.log", JobID))));
            Logger.Backends.Add(Logger.ConsoleLogger);

            RepositoryURL = repositoryURL;

            Environment = new CommandEnvironment();
        }

        public Stream GetLogStream(string name)
        {
            if (!logStreams.TryGetValue(name,out MemoryStream logStream))
            {
                logStream = new MemoryStream();
                logStreams.Add(name, logStream);
            }
            return logStream;
        }
        public Logger GetLogger(string name)
        {
            if (!logStreamLoggers.TryGetValue(name, out Logger logStreamLogger))
            {
                logStreamLogger = new Logger(GetLogStream(name));
                logStreamLogger.Backends.Add(Logger.ConsoleLogger);
                logStreamLoggers.Add(name, logStreamLogger);
            }
            return logStreamLogger;
        }

        public string GetLoggedContent(string name)
        {
            logStreams[name].Position = 0;
            using StreamReader sr = new StreamReader(logStreams[name]);
            return sr.ReadToEnd();
        }
        public IEnumerable<string> GetLogStreamNames() => logStreams.Keys;

        public string GetVariable(string varName) => Environment.Get(varName);
        public string GetVariable(string varName,string defValue) => Environment.Get(varName, defValue);
        public bool ContainsVariable(string varName) => Environment.Contains(varName);
        public CIJob SetVariable(string varName,string varValue){ Environment.Set(varName,varValue); return this; }

        public async void UpdateBuildState(BuildState buildState)
        {
            BuildState = buildState;

            string buildStateURL = String.Format("https://git.l--n.de/api/v1/repos/{0}/{1}/statuses/{2}",
                GetVariable("REPO_OWNER"),
                GetVariable("REPO_NAME"),
                GetVariable("COMMIT_ID")
                );

            if (buildStateURL != null)
            {
                JSONObject stateObject = new JSONObject();
                stateObject.Add("context", "ln.build");
                stateObject.Add("description", "build job pending");
                stateObject.Add("state", buildState.ToString().ToLower());
                stateObject.Add("target_url", JSONNull.Instance);

                HttpResponseMessage response = httpClient.PostAsync(buildStateURL, new StringContent(stateObject.ToString(),Encoding.UTF8,"application/json")).Result;
                Logger.Log(LogLevel.DEBUG, "UpdateBuildState({0}): {1}", buildState, buildStateURL);
                Logger.Log(LogLevel.DEBUG, "Response: {0}", response );
            }
        }

        public override void RunJob()
        {
            if (CloneRepository())
            {
                if (DetectPipelines())
                {
                    UpdateBuildState(BuildState.PENDING);

                    try{
                        foreach (PipeLine pipeLine in pipeLines)
                        {
                            pipeLine.Run(this);
                        }
                        UpdateBuildState(BuildState.SUCCESS);
                    } catch (Exception e)
                    {
                        UpdateBuildState(BuildState.FAILURE);
                    }
                }
            } else {
                Logger.Log(LogLevel.ERROR, "CIJob failed at CloneRepository()");
            }

            Notify();
            Cleanup();
        }

        public bool CloneRepository()
        {
            Logging.Log("cloning repository to {0}", WorkingDirectory);
            return 
                (new CommandRunner(Logger, "git", "clone", RepositoryURL, WorkingDirectory).Run(Environment) == 0) &&
                (!ContainsVariable("COMMIT_ID") || new CommandRunner(Logger, "git", "checkout", GetVariable("COMMIT_ID")){ WorkingDirectory = this.WorkingDirectory, }.Run(Environment) == 0);
        }

        public bool DetectPipelines()
        {
            if (CurrentCIService != null)
            {
                foreach (PipeLine pipeLine in CurrentCIService.PipeLines)
                {
                    if (pipeLine.DetectValidity(this))
                        pipeLines.Add(pipeLine);
                }
            }
            return pipeLines.Count > 0;
        }

        public void Notify()
        {
            // foreach (string key in logStreams.Keys)
            // {
            //     logStreams[key].Position = 0;
            //     string logContent;
            //     using (StreamReader sr = new StreamReader(logStreams[key]))
            //         logContent = sr.ReadToEnd();

            //     Logger.Log(LogLevel.INFO, "------------------- LogStream {0} ---------------------------\n{1}", key, logContent);
            // }
        }

        public void Cleanup()
        {
            CurrentCIService.CreateReport(this);
            Directory.Delete(WorkingDirectory, true);
        }


        static CIJob()
        {
            httpClient.DefaultRequestHeaders.Add("Authorization","token 1d03e9577c404b5b4f46b340147b1d500ff95b2e");
        }
    }
}