Github release assets model autodownload (ultralytics#711)

* assets autodownload

* Update google_utils.py

* Update google_utils.py

* Update google_utils.py

* Update google_utils.py

* Update google_utils.py

Co-authored-by: Glenn Jocher <glenn.jocher@ultralytics.com>

utils/google_utils.py

@@ -6,40 +6,50 @@
 import platform
 import time
 from pathlib import Path
+import torch
 
 
 def attempt_download(weights):
     # Attempt to download pretrained weights if not found locally
     weights = weights.strip().replace("'", '')
-    msg = weights + ' missing, try downloading from https://drive.google.com/drive/folders/1Drs_Aiu7xx6S-ix95f9kNsA6ueKRpN2J'
-
-    r = 1  # return
-    if len(weights) > 0 and not os.path.isfile(weights):
-        d = {'yolov3-spp.pt': '1mM67oNw4fZoIOL1c8M3hHmj66d8e-ni_',  # yolov3-spp.yaml
-             'yolov5s.pt': '1R5T6rIyy3lLwgFXNms8whc-387H0tMQO',  # yolov5s.yaml
-             'yolov5m.pt': '1vobuEExpWQVpXExsJ2w-Mbf3HJjWkQJr',  # yolov5m.yaml
-             'yolov5l.pt': '1hrlqD1Wdei7UT4OgT785BEk1JwnSvNEV',  # yolov5l.yaml
-             'yolov5x.pt': '1mM8aZJlWTxOg7BZJvNUMrTnA2AbeCVzS',  # yolov5x.yaml
-             }
-
-        file = Path(weights).name
-        if file in d:
-            r = gdrive_download(id=d[file], name=weights)
-
-        if not (r == 0 and os.path.exists(weights) and os.path.getsize(weights) > 1E6):  # weights exist and > 1MB
-            os.remove(weights) if os.path.exists(weights) else None  # remove partial downloads
-            s = 'curl -L -o %s "storage.googleapis.com/ultralytics/yolov5/ckpt/%s"' % (weights, file)
-            r = os.system(s)  # execute, capture return values
-
-            # Error check
-            if not (r == 0 and os.path.exists(weights) and os.path.getsize(weights) > 1E6):  # weights exist and > 1MB
+    file = Path(weights).name
+
+    msg = weights + ' missing, try downloading from https://github.com/ultralytics/yolov5/releases/'
+    models = ['yolov5s.pt', 'yolov5m.pt', 'yolov5l.pt', 'yolov5x.pt']  # available models
+
+    if file in models and not os.path.isfile(weights):
+        # Google Drive
+        # d = {'yolov5s.pt': '1R5T6rIyy3lLwgFXNms8whc-387H0tMQO',
+        #      'yolov5m.pt': '1vobuEExpWQVpXExsJ2w-Mbf3HJjWkQJr',
+        #      'yolov5l.pt': '1hrlqD1Wdei7UT4OgT785BEk1JwnSvNEV',
+        #      'yolov5x.pt': '1mM8aZJlWTxOg7BZJvNUMrTnA2AbeCVzS'}
+        # r = gdrive_download(id=d[file], name=weights) if file in d else 1
+        # if r == 0 and os.path.exists(weights) and os.path.getsize(weights) > 1E6:  # check
+        #    return
+
+        try:  # GitHub
+            url = 'https://github.com/ultralytics/yolov5/releases/download/v2.0/' + file
+            print('Downloading %s to %s...' % (url, weights))
+            if platform.system() == 'Darwin':  # avoid MacOS python requests certificate error
+                r = os.system('curl -L %s -o %s' % (url, weights))
+            else:
+                torch.hub.download_url_to_file(url, weights)
+            assert os.path.exists(weights) and os.path.getsize(weights) > 1E6  # check
+        except Exception as e:  # GCP
+            print('Download error: %s' % e)
+            url = 'https://storage.googleapis.com/ultralytics/yolov5/ckpt/' + file
+            print('Downloading %s to %s...' % (url, weights))
+            r = os.system('curl -L %s -o %s' % (url, weights))  # torch.hub.download_url_to_file(url, weights)
+        finally:
+            if not (os.path.exists(weights) and os.path.getsize(weights) > 1E6):  # check
                 os.remove(weights) if os.path.exists(weights) else None  # remove partial downloads
-                raise Exception(msg)
+                print('ERROR: Download failure: %s' % msg)
+            print('')
+            return
 
 
 def gdrive_download(id='1n_oKgR81BJtqk75b00eAjdv03qVCQn2f', name='coco128.zip'):
-    # Downloads a file from Google Drive, accepting presented query
-    # from utils.google_utils import *; gdrive_download()
+    # Downloads a file from Google Drive. from utils.google_utils import *; gdrive_download()
     t = time.time()
 
     print('Downloading https://drive.google.com/uc?export=download&id=%s as %s... ' % (id, name), end='')
@@ -53,7 +63,7 @@ def gdrive_download(id='1n_oKgR81BJtqk75b00eAjdv03qVCQn2f', name='coco128.zip'):
         s = 'curl -Lb ./cookie "drive.google.com/uc?export=download&confirm=%s&id=%s" -o %s' % (get_token(), id, name)
     else:  # small file
         s = 'curl -s -L -o %s "drive.google.com/uc?export=download&id=%s"' % (name, id)
-    r = os.system(s)  # execute, capture return values
+    r = os.system(s)  # execute, capture return
     os.remove('cookie') if os.path.exists('cookie') else None
 
     # Error check