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Added implementations for *io/fs.subFS, os.DirFS, and testing/fstest.MapFS.
Amended testing/fstest.TestFS to check behavior.
Addressed TODOs in archive/tar and os.CopyFS around symbolic links.
I am deliberately not changing archive/zip in this CL,
since it currently does not resolve symlinks
as part of its filesystem implementation.
I am unsure of the compatibility restrictions on doing so,
so figured it would be better to address independently.
testing/fstest.MapFS now includes resolution of symlinks,
with MapFile.Data storing the symlink data.
The behavior change there seemed less intrusive,
especially given its intended usage in tests,
and it is especially helpful in testing the io/fs function implementations.
Fixes #49580
Change-Id: I58ec6915e8cc97341cdbfd9c24c67d1b60139447
Reviewed-on: https://go-review.googlesource.com/c/go/+/385534
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Reviewed-by: Daniel Martí <mvdan@mvdan.cc>
Reviewed-by: Bryan Mills <bcmills@google.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
Reviewed-by: Quim Muntal <quimmuntal@gmail.com>
Reviewed-by: Funda Secgin <fundasecgin33@gmail.com>
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Change-Id: I5a68389a68875dbb2f6875de3f64f63dd7ca1af7
Reviewed-on: https://go-review.googlesource.com/c/go/+/565055
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>
Auto-Submit: Ian Lance Taylor <iant@google.com>
Reviewed-by: Than McIntosh <thanm@google.com>
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As MapFS ignores filemodes and always grant read and traverse access on
directories, let's make synthetized directory entries to expose filemode
0555 instead of 0000.
Fixes #63468.
Change-Id: I5d64a6bf2f2ac6082ca5dde55b3062669fb50b8d
Reviewed-on: https://go-review.googlesource.com/c/go/+/534075
Reviewed-by: Ian Lance Taylor <iant@google.com>
Auto-Submit: Ian Lance Taylor <iant@google.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
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Prior to this commit, specifying a file for "." in MapFS
created an invalid fs.FS and caused infinite recursion in fs.WalkDir.
Fixes #46776
Change-Id: Ia9e4ae1125355a74dba9ee6b36451b7fda75a862
Reviewed-on: https://go-review.googlesource.com/c/go/+/328409
Trust: Josh Bleecher Snyder <josharian@gmail.com>
Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
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This change adds basic test helpers for file system code.
The type MapFS is a simple map-based file system for use when
exercising general file system code.
The func TestFS tests a file system implementation.
For #41190.
Change-Id: I5a2036f57e733915ad508651ad7317749794423c
Reviewed-on: https://go-review.googlesource.com/c/go/+/243910
Trust: Russ Cox <rsc@golang.org>
Reviewed-by: Rob Pike <r@golang.org>
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