Blame conda_gateways_disk_create.patch

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diff -up conda-4.7.0/conda/gateways/disk/create.py.orig conda-4.7.0/conda/gateways/disk/create.py
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--- conda-4.7.0/conda/gateways/disk/create.py.orig	2019-05-17 11:08:48.000000000 -0600
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+++ conda-4.7.0/conda/gateways/disk/create.py	2019-05-18 19:46:11.428298209 -0600
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@@ -28,7 +28,7 @@ from ...base.context import context
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 from ...common.compat import on_win
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 from ...common.path import ensure_pad, expand, win_path_double_escape, win_path_ok
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 from ...common.serialize import json_dump
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-from ...exceptions import BasicClobberError, CondaOSError, maybe_raise
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+from ...exceptions import BasicClobberError, CondaOSError, maybe_raise, NotWritableError
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 from ...models.enums import FileMode, LinkType
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@@ -438,6 +438,9 @@ def create_package_cache_directory(pkgs_
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         sudo_safe = expand(pkgs_dir).startswith(expand('~'))
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         touch(join(pkgs_dir, PACKAGE_CACHE_MAGIC_FILE), mkdir=True, sudo_safe=sudo_safe)
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         touch(join(pkgs_dir, 'urls'), sudo_safe=sudo_safe)
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+    except NotWritableError:
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+        log.trace("cannot create package cache directory '%s'", pkgs_dir)
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+        return False
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     except (IOError, OSError) as e:
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         if e.errno in (EACCES, EPERM, EROFS):
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             log.trace("cannot create package cache directory '%s'", pkgs_dir)