From 476de84dc5729b263e82543de742e2a1219f6d71 Mon Sep 17 00:00:00 2001
From: Ivan Kravets <me@ikravets.com>
Date: Thu, 23 Apr 2015 12:54:59 +0100
Subject: [PATCH] Allow to specify environment prefix when initialise project
 // Resolve #182

---
 HISTORY.rst                 |  2 ++
 docs/userguide/cmd_init.rst |  8 ++++++++
 platformio/commands/init.py | 15 +++++++++++----
 3 files changed, 21 insertions(+), 4 deletions(-)

diff --git a/HISTORY.rst b/HISTORY.rst
index 33713b31..b765373a 100644
--- a/HISTORY.rst
+++ b/HISTORY.rst
@@ -16,6 +16,8 @@ Release History
   (`issue #167 <https://github.com/platformio/platformio/issues/167>`_)
 * Allowed to choose which library to update
   (`issue #168 <https://github.com/platformio/platformio/issues/168>`_)
+* Allowed to specify `platformio init --env-prefix <http://docs.platformio.org/en/latest/userguide/cmd_init.html#cmdoption--env-prefix>`__ when initialise/update project
+  (`issue #182 <https://github.com/platformio/platformio/issues/182>`_)
 * Disabled automatic updates by default for platforms, packages and libraries
   (`issue #171 <https://github.com/platformio/platformio/issues/171>`_)
 * Fixed bug with creating copies of source files
diff --git a/docs/userguide/cmd_init.rst b/docs/userguide/cmd_init.rst
index 4890adf1..637cdafd 100644
--- a/docs/userguide/cmd_init.rst
+++ b/docs/userguide/cmd_init.rst
@@ -54,6 +54,14 @@ If you initialise project with the specified ``--board``, then *PlatformIO*
 will create environment with enabled firmware auto-uploading. This option
 allows you to disable firmware auto-uploading by default.
 
+.. option::
+    --env-prefix
+
+An environment prefix which will be used with pair in board type. The default
+value is ``autogen_``. For example, the default environment name for
+``teensy_31`` board will be ``[env:autogen_teensy_31]``.
+
+
 Examples
 --------
 
diff --git a/platformio/commands/init.py b/platformio/commands/init.py
index cd301978..a77d753a 100644
--- a/platformio/commands/init.py
+++ b/platformio/commands/init.py
@@ -29,7 +29,8 @@ def validate_boards(ctx, param, value):  # pylint: disable=W0613
 @click.option("--board", "-b", multiple=True, metavar="TYPE",
               callback=validate_boards)
 @click.option("--disable-auto-uploading", is_flag=True)
-def cli(project_dir, board, disable_auto_uploading):
+@click.option("--env-prefix", default="autogen_")
+def cli(project_dir, board, disable_auto_uploading, env_prefix):
 
     # ask about auto-uploading
     if board and app.get_setting("enable_prompts"):
@@ -78,7 +79,8 @@ def cli(project_dir, board, disable_auto_uploading):
                  project_file)
 
     if board:
-        fill_project_envs(project_file, board, disable_auto_uploading)
+        fill_project_envs(
+            project_file, board, disable_auto_uploading, env_prefix)
 
     click.secho(
         "\nProject has been successfully initialized!\nUseful commands:\n"
@@ -92,7 +94,8 @@ def cli(project_dir, board, disable_auto_uploading):
     )
 
 
-def fill_project_envs(project_file, board_types, disable_auto_uploading):
+def fill_project_envs(project_file, board_types, disable_auto_uploading,
+                      env_prefix):
     builtin_boards = get_boards()
     content = []
     used_envs = []
@@ -103,7 +106,7 @@ def fill_project_envs(project_file, board_types, disable_auto_uploading):
 
     for type_ in board_types:
         data = builtin_boards[type_]
-        env_name = "[env:autogen_%s]" % type_
+        env_name = "[env:%s%s]" % (env_prefix, type_)
 
         if env_name in used_envs:
             continue
@@ -121,5 +124,9 @@ def fill_project_envs(project_file, board_types, disable_auto_uploading):
         content.append("%stargets = upload" % ("# " if disable_auto_uploading
                                                else ""))
 
+    if not content:
+        return
+
     with open(project_file, "a") as f:
+        content.append("")
         f.write("\n".join(content))