From f7b30c3129aabb45384c30591ac66f6a1ddab15e Mon Sep 17 00:00:00 2001
From: thelittlefireman <thelittlefireman@users.noreply.github.com>
Date: Fri, 28 Jul 2017 15:13:45 +0200
Subject: [PATCH] fix python error when files already exist

related to :
```
  File "/usr/lib/python3.5/runpy.py", line 184, in _run_module_as_main
    "__main__", mod_spec)
  File "/usr/lib/python3.5/runpy.py", line 85, in _run_code
    exec(code, run_globals)
  File "/root/src/app.py", line 189, in <module>
    run()
  File "/root/src/app.py", line 178, in run
    prepare_avd(device, avd_name)
  File "/root/src/app.py", line 74, in prepare_avd
    os.symlink(os.path.join(skin_rsc_path, s), os.path.join(skin_dst_path, s))
FileExistsError: [Errno 17] File exists: '/root/devices/skins/galaxy_nexus' -> '/root/platforms/android-25/skins/galaxy_nexus'
Traceback (most recent call last):
  File "/usr/lib/python3.5/runpy.py", line 184, in _run_module_as_main
    "__main__", mod_spec)
  File "/usr/lib/python3.5/runpy.py", line 85, in _run_code
    exec(code, run_globals)
  File "/root/src/app.py", line 189, in <module>
    run()
  File "/root/src/app.py", line 178, in run
    prepare_avd(device, avd_name)
  File "/root/src/app.py", line 74, in prepare_avd
    os.symlink(os.path.join(skin_rsc_path, s), os.path.join(skin_dst_path, s))
FileExistsError: [Errno 17] File exists: '/root/devices/skins/galaxy_nexus' -> '/root/platforms/android-25/skins/galaxy_nexus'
```
---
 src/app.py | 13 +++++++++++--
 1 file changed, 11 insertions(+), 2 deletions(-)

diff --git a/src/app.py b/src/app.py
index de493a2..13372f4 100644
--- a/src/app.py
+++ b/src/app.py
@@ -11,6 +11,15 @@ from src import log
 log.init()
 logger = logging.getLogger('app')
 
+def symlink_force(target, link_name):
+    try:
+        os.symlink(target, link_name)
+    except OSError, e:
+        if e.errno == errno.EEXIST:
+            os.remove(link_name)
+            os.symlink(target, link_name)
+        else:
+            raise e
 
 def get_or_raise(env: str) -> str:
     """
@@ -71,7 +80,7 @@ def prepare_avd(device: str, avd_name: str):
     skin_dst_path = os.path.join(ANDROID_HOME, 'platforms', 'android-{api}'.format(api=API_LEVEL), 'skins')
     logger.info('Skin destination path: {dst}'.format(dst=skin_dst_path))
     for s in os.listdir(skin_rsc_path):
-        os.symlink(os.path.join(skin_rsc_path, s), os.path.join(skin_dst_path, s))
+        symlink_force(os.path.join(skin_rsc_path, s), os.path.join(skin_dst_path, s))
 
     # Hardware and its skin
     device_name_bash = device.replace(' ', '\ ')
@@ -85,7 +94,7 @@ def prepare_avd(device: str, avd_name: str):
         profile_src_path = os.path.join(ROOT, 'devices', 'profiles', '{profile}.xml'.format(profile=skin_name))
         logger.info('Hardware profile resource path: {rsc}'.format(rsc=profile_src_path))
         logger.info('Hardware profile destination path: {dst}'.format(dst=profile_dst_path))
-        os.symlink(profile_src_path, profile_dst_path)
+        symlink_force(profile_src_path, profile_dst_path)
 
     # Append command
     cmd += ' -d {device} -s {skin}'.format(device=device_name_bash, skin=skin_name)