cleanup: convert exceptions to OSError

In Python 3, these exceptions were merged into OSError, so switch
everything over to that.

Change-Id: If876a28b692de5aa5c62a3bdc8c000793ce52c63
Reviewed-on: https://gerrit-review.googlesource.com/c/git-repo/+/390376
Reviewed-by: Aravind Vasudevan <aravindvasudev@google.com>
Commit-Queue: Mike Frysinger <vapier@google.com>
Tested-by: Mike Frysinger <vapier@google.com>

git_config.py

@@ -370,7 +370,7 @@ class GitConfig:
             with Trace(": parsing %s", self.file):
                 with open(self._json) as fd:
                     return json.load(fd)
-        except (IOError, ValueError):
+        except (OSError, ValueError):
             platform_utils.remove(self._json, missing_ok=True)
             return None
 
@@ -378,7 +378,7 @@ class GitConfig:
         try:
             with open(self._json, "w") as fd:
                 json.dump(cache, fd, indent=2)
-        except (IOError, TypeError):
+        except (OSError, TypeError):
             platform_utils.remove(self._json, missing_ok=True)
 
     def _ReadGit(self):

git_refs.py

@@ -107,8 +107,6 @@ class GitRefs:
         try:
             fd = open(path)
             mtime = os.path.getmtime(path)
-        except IOError:
-            return
         except OSError:
             return
         try:

git_superproject.py

@@ -381,7 +381,7 @@ class Superproject:
         try:
             with open(manifest_path, "w", encoding="utf-8") as fp:
                 fp.write(manifest_str)
-        except IOError as e:
+        except OSError as e:
             self._LogError("cannot write manifest to : {} {}", manifest_path, e)
             return None
         return manifest_path

main.py

@@ -789,7 +789,7 @@ def init_http():
             mgr.add_password(p[1], "https://%s/" % host, p[0], p[2])
     except netrc.NetrcParseError:
         pass
-    except IOError:
+    except OSError:
         pass
     handlers.append(_BasicAuthHandler(mgr))
     handlers.append(_DigestAuthHandler(mgr))

project.py

@@ -431,7 +431,7 @@ class _CopyFile:
                 mode = os.stat(dest)[stat.ST_MODE]
                 mode = mode & ~(stat.S_IWUSR | stat.S_IWGRP | stat.S_IWOTH)
                 os.chmod(dest, mode)
-            except IOError:
+            except OSError:
                 logger.error("error: Cannot copy file %s to %s", src, dest)
 
 
@@ -466,7 +466,7 @@ class _LinkFile:
                     if not platform_utils.isdir(dest_dir):
                         os.makedirs(dest_dir)
                 platform_utils.symlink(relSrc, absDest)
-            except IOError:
+            except OSError:
                 logger.error(
                     "error: Cannot link file %s to %s", relSrc, absDest
                 )
@@ -1198,7 +1198,7 @@ class Project:
             with tarfile.open(tarpath, "r") as tar:
                 tar.extractall(path=path)
                 return True
-        except (IOError, tarfile.TarError) as e:
+        except (OSError, tarfile.TarError) as e:
             logger.error("error: Cannot extract archive %s: %s", tarpath, e)
         return False
 
@@ -1309,7 +1309,7 @@ class Project:
                     alt_dir = os.path.join(
                         self.objdir, "objects", fd.readline().rstrip()
                     )
-            except IOError:
+            except OSError:
                 alt_dir = None
         else:
             alt_dir = None
@@ -3584,7 +3584,7 @@ class Project:
             try:
                 with open(path) as fd:
                     line = fd.readline()
-            except IOError as e:
+            except OSError as e:
                 raise NoManifestException(path, str(e))
             try:
                 line = line.decode()

repo

@@ -627,7 +627,7 @@ def get_gitc_manifest_dir():
                     match = re.match("gitc_dir=(?P<gitc_manifest_dir>.*)", line)
                     if match:
                         _gitc_manifest_dir = match.group("gitc_manifest_dir")
-        except IOError:
+        except OSError:
             pass
     return _gitc_manifest_dir
 
@@ -1277,7 +1277,7 @@ class Requirements:
         try:
             with open(path, "rb") as f:
                 data = f.read()
-        except EnvironmentError:
+        except OSError:
             # NB: EnvironmentError is used for Python 2 & 3 compatibility.
             # If we couldn't open the file, assume it's an old source tree.
             return None

subcmds/sync.py

@@ -21,7 +21,6 @@ import multiprocessing
 import netrc
 import optparse
 import os
-import socket
 import sys
 import tempfile
 import time
@@ -1376,7 +1375,7 @@ later is required to fix a server side protocol bug.
             else:
                 try:
                     info = netrc.netrc()
-                except IOError:
+                except OSError:
                     # .netrc file does not exist or could not be opened.
                     pass
                 else:
@@ -1435,7 +1434,7 @@ later is required to fix a server side protocol bug.
                 try:
                     with open(smart_sync_manifest_path, "w") as f:
                         f.write(manifest_str)
-                except IOError as e:
+                except OSError as e:
                     raise SmartSyncError(
                         "error: cannot write manifest to %s:\n%s"
                         % (smart_sync_manifest_path, e),
@@ -1446,7 +1445,7 @@ later is required to fix a server side protocol bug.
                 raise SmartSyncError(
                     "error: manifest server RPC call failed: %s" % manifest_str
                 )
-        except (socket.error, IOError, xmlrpc.client.Fault) as e:
+        except (OSError, xmlrpc.client.Fault) as e:
             raise SmartSyncError(
                 "error: cannot connect to manifest server %s:\n%s"
                 % (manifest.manifest_server, e),
@@ -1931,7 +1930,7 @@ class _FetchTimes:
             try:
                 with open(self._path) as f:
                     self._saved = json.load(f)
-            except (IOError, ValueError):
+            except (OSError, ValueError):
                 platform_utils.remove(self._path, missing_ok=True)
                 self._saved = {}
 
@@ -1947,7 +1946,7 @@ class _FetchTimes:
         try:
             with open(self._path, "w") as f:
                 json.dump(self._seen, f, indent=2)
-        except (IOError, TypeError):
+        except (OSError, TypeError):
             platform_utils.remove(self._path, missing_ok=True)
 
 
@@ -1994,7 +1993,7 @@ class LocalSyncState:
             try:
                 with open(self._path) as f:
                     self._state = json.load(f)
-            except (IOError, ValueError):
+            except (OSError, ValueError):
                 platform_utils.remove(self._path, missing_ok=True)
                 self._state = {}
 
@@ -2004,7 +2003,7 @@ class LocalSyncState:
         try:
             with open(self._path, "w") as f:
                 json.dump(self._state, f, indent=2)
-        except (IOError, TypeError):
+        except (OSError, TypeError):
             platform_utils.remove(self._path, missing_ok=True)
 
     def PruneRemovedProjects(self):
@@ -2137,7 +2136,7 @@ class PersistentTransport(xmlrpc.client.Transport):
             try:
                 p.feed(data)
             except xml.parsers.expat.ExpatError as e:
-                raise IOError(
+                raise OSError(
                     f"Parsing the manifest failed: {e}\n"
                     f"Please report this to your manifest server admin.\n"
                     f'Here is the full response:\n{data.decode("utf-8")}'