We are currently solving the following issue within our repository. Here is the issue text:
--- BEGIN ISSUE ---
dvc: fix version generatio
Looks like dynamic version got broken https://travis-ci.com/iterative/dvc/jobs/274986530 .


--- END ISSUE ---

Below are some code segments, each from a relevant file. One or more of these files may contain bugs.
--- BEGIN FILES ---
Path: `dvc/version.py`
Content:
```
1 # Used in setup.py, so don't pull any additional dependencies
2 #
3 # Based on:
4 #   - https://github.com/python/mypy/blob/master/mypy/version.py
5 #   - https://github.com/python/mypy/blob/master/mypy/git.py
6 import os
7 import subprocess
8 
9 
10 _BASE_VERSION = "0.81.0"
11 
12 
13 def _generate_version(base_version):
14     """Generate a version with information about the git repository"""
15     pkg_dir = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
16 
17     if not _is_git_repo(pkg_dir) or not _have_git():
18         return base_version
19 
20     if _is_release(pkg_dir, base_version) and not _is_dirty(pkg_dir):
21         return base_version
22 
23     return "{base_version}+{short_sha}{dirty}".format(
24         base_version=base_version,
25         short_sha=_git_revision(pkg_dir).decode("utf-8")[0:6],
26         dirty=".mod" if _is_dirty(pkg_dir) else "",
27     )
28 
29 
30 def _is_git_repo(dir_path):
31     """Is the given directory version-controlled with git?"""
32     return os.path.exists(os.path.join(dir_path, ".git"))
33 
34 
35 def _have_git():
36     """Can we run the git executable?"""
37     try:
38         subprocess.check_output(["git", "--help"])
39         return True
40     except subprocess.CalledProcessError:
41         return False
42     except OSError:
43         return False
44 
45 
46 def _is_release(dir_path, base_version):
47     try:
48         output = subprocess.check_output(
49             ["git", "describe", "--tags", "--exact-match"],
50             cwd=dir_path,
51             stderr=subprocess.STDOUT,
52         )
53         tag = output.strip()
54         return tag == base_version
55     except subprocess.CalledProcessError:
56         return False
57 
58 
59 def _git_revision(dir_path):
60     """Get the SHA-1 of the HEAD of a git repository."""
61     return subprocess.check_output(
62         ["git", "rev-parse", "HEAD"], cwd=dir_path
63     ).strip()
64 
65 
66 def _is_dirty(dir_path):
67     """Check whether a git repository has uncommitted changes."""
68     try:
69         subprocess.check_call(["git", "diff", "--quiet"], cwd=dir_path)
70         return False
71     except subprocess.CalledProcessError:
72         return True
73 
74 
75 __version__ = _generate_version(_BASE_VERSION)
76
```
--- END FILES ---

Please first localize the bug based on the issue statement, and then generate a patch according to the `git diff` format fenced by three backticks.

Here is an example:

```diff
diff --git a/examples/server_async.py b/examples/server_async.py
--- a/examples/server_async.py
+++ b/examples/server_async.py
@@ -313,4 +313,4 @@
 
 
 if __name__ == "__main__":
-    asyncio.run(run_async_server("."), debug=True)
+    asyncio.run(run_async_server(), debug=True)
diff --git a/examples/server_sync.py b/examples/server_sync.py
--- a/examples/server_sync.py
+++ b/examples/server_sync.py
@@ -313,5 +313,5 @@
 
 
 if __name__ == "__main__":
-    server = run_sync_server(".")
+    server = run_sync_server()
     server.shutdown()

```

diff --git a/dvc/version.py b/dvc/version.py
--- a/dvc/version.py
+++ b/dvc/version.py
@@ -49,7 +49,7 @@
             ["git", "describe", "--tags", "--exact-match"],
             cwd=dir_path,
             stderr=subprocess.STDOUT,
-        )
+        ).decode("utf-8")
         tag = output.strip()
         return tag == base_version
     except subprocess.CalledProcessError:

{"golden_diff": "diff --git a/dvc/version.py b/dvc/version.py\n--- a/dvc/version.py\n+++ b/dvc/version.py\n@@ -49,7 +49,7 @@\n             [\"git\", \"describe\", \"--tags\", \"--exact-match\"],\n             cwd=dir_path,\n             stderr=subprocess.STDOUT,\n-        )\n+        ).decode(\"utf-8\")\n         tag = output.strip()\n         return tag == base_version\n     except subprocess.CalledProcessError:\n", "issue": "dvc: fix version generatio\nLooks like dynamic version got broken https://travis-ci.com/iterative/dvc/jobs/274986530 .\r\n\n", "before_files": [{"content": "# Used in setup.py, so don't pull any additional dependencies\n#\n# Based on:\n#   - https://github.com/python/mypy/blob/master/mypy/version.py\n#   - https://github.com/python/mypy/blob/master/mypy/git.py\nimport os\nimport subprocess\n\n\n_BASE_VERSION = \"0.81.0\"\n\n\ndef _generate_version(base_version):\n    \"\"\"Generate a version with information about the git repository\"\"\"\n    pkg_dir = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))\n\n    if not _is_git_repo(pkg_dir) or not _have_git():\n        return base_version\n\n    if _is_release(pkg_dir, base_version) and not _is_dirty(pkg_dir):\n        return base_version\n\n    return \"{base_version}+{short_sha}{dirty}\".format(\n        base_version=base_version,\n        short_sha=_git_revision(pkg_dir).decode(\"utf-8\")[0:6],\n        dirty=\".mod\" if _is_dirty(pkg_dir) else \"\",\n    )\n\n\ndef _is_git_repo(dir_path):\n    \"\"\"Is the given directory version-controlled with git?\"\"\"\n    return os.path.exists(os.path.join(dir_path, \".git\"))\n\n\ndef _have_git():\n    \"\"\"Can we run the git executable?\"\"\"\n    try:\n        subprocess.check_output([\"git\", \"--help\"])\n        return True\n    except subprocess.CalledProcessError:\n        return False\n    except OSError:\n        return False\n\n\ndef _is_release(dir_path, base_version):\n    try:\n        output = subprocess.check_output(\n            [\"git\", \"describe\", \"--tags\", \"--exact-match\"],\n            cwd=dir_path,\n            stderr=subprocess.STDOUT,\n        )\n        tag = output.strip()\n        return tag == base_version\n    except subprocess.CalledProcessError:\n        return False\n\n\ndef _git_revision(dir_path):\n    \"\"\"Get the SHA-1 of the HEAD of a git repository.\"\"\"\n    return subprocess.check_output(\n        [\"git\", \"rev-parse\", \"HEAD\"], cwd=dir_path\n    ).strip()\n\n\ndef _is_dirty(dir_path):\n    \"\"\"Check whether a git repository has uncommitted changes.\"\"\"\n    try:\n        subprocess.check_call([\"git\", \"diff\", \"--quiet\"], cwd=dir_path)\n        return False\n    except subprocess.CalledProcessError:\n        return True\n\n\n__version__ = _generate_version(_BASE_VERSION)\n", "path": "dvc/version.py"}], "after_files": [{"content": "# Used in setup.py, so don't pull any additional dependencies\n#\n# Based on:\n#   - https://github.com/python/mypy/blob/master/mypy/version.py\n#   - https://github.com/python/mypy/blob/master/mypy/git.py\nimport os\nimport subprocess\n\n\n_BASE_VERSION = \"0.81.0\"\n\n\ndef _generate_version(base_version):\n    \"\"\"Generate a version with information about the git repository\"\"\"\n    pkg_dir = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))\n\n    if not _is_git_repo(pkg_dir) or not _have_git():\n        return base_version\n\n    if _is_release(pkg_dir, base_version) and not _is_dirty(pkg_dir):\n        return base_version\n\n    return \"{base_version}+{short_sha}{dirty}\".format(\n        base_version=base_version,\n        short_sha=_git_revision(pkg_dir).decode(\"utf-8\")[0:6],\n        dirty=\".mod\" if _is_dirty(pkg_dir) else \"\",\n    )\n\n\ndef _is_git_repo(dir_path):\n    \"\"\"Is the given directory version-controlled with git?\"\"\"\n    return os.path.exists(os.path.join(dir_path, \".git\"))\n\n\ndef _have_git():\n    \"\"\"Can we run the git executable?\"\"\"\n    try:\n        subprocess.check_output([\"git\", \"--help\"])\n        return True\n    except subprocess.CalledProcessError:\n        return False\n    except OSError:\n        return False\n\n\ndef _is_release(dir_path, base_version):\n    try:\n        output = subprocess.check_output(\n            [\"git\", \"describe\", \"--tags\", \"--exact-match\"],\n            cwd=dir_path,\n            stderr=subprocess.STDOUT,\n        ).decode(\"utf-8\")\n        tag = output.strip()\n        return tag == base_version\n    except subprocess.CalledProcessError:\n        return False\n\n\ndef _git_revision(dir_path):\n    \"\"\"Get the SHA-1 of the HEAD of a git repository.\"\"\"\n    return subprocess.check_output(\n        [\"git\", \"rev-parse\", \"HEAD\"], cwd=dir_path\n    ).strip()\n\n\ndef _is_dirty(dir_path):\n    \"\"\"Check whether a git repository has uncommitted changes.\"\"\"\n    try:\n        subprocess.check_call([\"git\", \"diff\", \"--quiet\"], cwd=dir_path)\n        return False\n    except subprocess.CalledProcessError:\n        return True\n\n\n__version__ = _generate_version(_BASE_VERSION)\n", "path": "dvc/version.py"}]}