Adding executor description for verbose output, adding output directory for build artifacts

libdaggy/include/daggy/ThreadPool.hpp

@@ -169,6 +169,11 @@ namespace daggy {
       cv_.notify_one();
     }
 
+    size_t size() const
+    {
+      return workers_.size();
+    }
+
   private:
     // need to keep track of threads, so we can join them
     std::vector<std::thread> workers_;

libdaggy/include/daggy/executors/task/DaggyRunnerTaskExecutor.hpp

@@ -51,6 +51,8 @@ namespace daggy::executors::task {
 
     bool stop(DAGRunID runID, const std::string &taskName) override;
 
+    std::string description() const;
+
     void addRunner(const std::string &url);
 
   private:

libdaggy/include/daggy/executors/task/ForkingTaskExecutor.hpp

@@ -31,6 +31,8 @@ namespace daggy::executors::task {
 
     bool stop(DAGRunID runID, const std::string &taskName) override;
 
+    std::string description() const override;
+
   private:
     ThreadPool tp_;
     std::mutex taskControlsGuard_;

libdaggy/include/daggy/executors/task/NoopTaskExecutor.hpp

@@ -21,5 +21,7 @@ namespace daggy::executors::task {
                                        const Task &task) override;
 
     bool stop(DAGRunID runID, const std::string &taskName) override;
+
+    std::string description() const;
   };
 }  // namespace daggy::executors::task

libdaggy/include/daggy/executors/task/SlurmTaskExecutor.hpp

@@ -25,6 +25,8 @@ namespace daggy::executors::task {
 
     bool stop(DAGRunID runID, const std::string &taskName) override;
 
+    std::string description() const override;
+
   private:
     struct Job
     {

libdaggy/include/daggy/executors/task/TaskExecutor.hpp

@@ -33,5 +33,8 @@ namespace daggy::executors::task {
 
     // Kill a currently executing task. This will resolve the future.
     virtual bool stop(DAGRunID runID, const std::string &taskName) = 0;
+
+    // Report a description of the executor
+    virtual std::string description() const = 0;
   };
 }  // namespace daggy::executors::task