Merge branch 'develop' into feature/platformio-30

* develop:
  Remove debug info
  Add "Rebuild C/C++ Project Index" target to CLion and Eclipse IDEs
  Iterating the dictionary directly instead of calling .keys()
  Iterating the dictionary directly instead of calling .keys()
  Add example dynamic `build_flags`
  Add new articles
  Update examples

platformio/commands/init.py

@@ -89,6 +89,10 @@ def cli(ctx, project_dir, board, ide,  # pylint: disable=R0913
         )
 
     if ide:
+        if not board:
+            board = get_first_board(project_dir)
+            if board:
+                board = [board]
         if not board:
             raise exception.BoardNotDefined()
         if len(board) > 1:
@@ -100,8 +104,7 @@ def cli(ctx, project_dir, board, ide,  # pylint: disable=R0913
                 "your list '%s'." % (board[0], ", ".join(board)),
                 fg="yellow"
             )
-        pg = ProjectGenerator(
-            project_dir, ide, board[0])
+        pg = ProjectGenerator(project_dir, ide, board[0])
         pg.generate()
 
     click.secho(
@@ -117,6 +120,17 @@ def cli(ctx, project_dir, board, ide,  # pylint: disable=R0913
     )
 
 
+def get_first_board(project_dir):
+    with util.cd(project_dir):
+        config = util.get_project_config()
+        for section in config.sections():
+            if not section.startswith("env:"):
+                continue
+            elif config.has_option(section, "board"):
+                return config.get(section, "board")
+    return None
+
+
 def init_base_project(project_dir):
     platformio_ini = join(project_dir, "platformio.ini")
     if not isfile(platformio_ini):