Update asv plugin for changes in latest asv

Closes #861

asv_oggm_plugin.py

@@ -13,55 +13,38 @@
 OGGM_CONDA_ENV_URL = ("https://raw.githubusercontent.com/OGGM/"
                       "OGGM-dependency-list/master/linux-64/{0}")
 OGGM_CONDA_ENVS = {
-    "36": "oggmdev-1.1.0.201903261531_20190326_py36.yml",
-    "37": "oggmdev-1.1.0.201903261531_20190326_py37.yml",
+    "36": "oggmdev-1.2.0.201908021451_20190802_py36.yml",
+    "37": "oggmdev-1.2.0.201908021451_20190802_py37.yml",
 }
 
 class OggmVirtualenv(Conda):
     tool_name = "oggm_conda"
 
-    def _has_requirement(self, line):
-        for key, _ in self._requirements.items():
-            key += "="
-            if key in line:
-                return True
-        return False
-
     def _setup(self):
         log.info("Creating oggm conda environment for {0}".format(self.name))
 
-        try:
-            conda = _find_conda()
-        except IOError as e:
-            raise util.UserError(str(e))
-
         env_file = tempfile.NamedTemporaryFile(mode="w", delete=False,
                                                suffix=".yml")
         try:
             pyver = str(self._python).replace(".", "")[:2]
             oggm_env = OGGM_CONDA_ENVS[pyver]
             req = requests.get(OGGM_CONDA_ENV_URL.format(oggm_env))
             req.raise_for_status()
-            env_text = req.text
 
-            for line in env_text.splitlines():
-                if line.startswith("prefix:") or self._has_requirement(line):
+            for line in req.text.splitlines():
+                if line.startswith("prefix:"):
                     continue
                 elif line.startswith("name:"):
                     env_file.write("name: {0}\n".format(self.name))
                 else:
                     env_file.write(line + "\n")
 
-            conda_args, pip_args = self._get_requirements(conda)
-            env_file.writelines(('  - %s\n' % s for s in conda_args))
-            if pip_args:
-                env_file.write('  - pip:\n')
-                env_file.writelines(('    - %s\n' % s for s in pip_args))
-
             env_file.close()
 
-            util.check_output([conda] + ['env', 'create', '-f', env_file.name,
-                                         '-p', self._path, '--force'])
+            self._conda_channels = ["conda-forge", "defaults"]
+            self._conda_environment_file = env_file.name
+
+            return super()._setup()
         except Exception as exc:
             if os.path.isfile(env_file.name):
                 with open(env_file.name, "r") as f: