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Daniel Martí a54762586f cmd/gofmt: simplify arg handling
First, we can use flag.Args instead of flag.NArg and flag.Arg.

Second, just call filepath.WalkDir directly on each argument. We don't
need to check if each argument is a directory or not, since the function
will still work on regular files as expected.

To continue giving an error in the "gofmt does-not-exist.go" case, we
now need to return and handle errors from filepath.WalkDir, too.
Arguably, that should have always been the case.

While at it, I noticed that the printinf of the "diff" command did not
obey the "out" parameter. Fix that.

Finally, remove the code to ignore IsNotExist errors. It was added in CL
19301, though it didn't include tests and its reasoning is dubious.
Using gofmt on a directory treewhile another program is concurrently
editing or removing files is inherently racy. Hiding errors can hide
valid problems from the user, and such racy usages aren't supported.

Change-Id: I2e74cc04c53eeefb25231d804752b53562b97371
Reviewed-on: https://go-review.googlesource.com/c/go/+/284138
Run-TryBot: Daniel Martí <mvdan@mvdan.cc>
Trust: Daniel Martí <mvdan@mvdan.cc>
Reviewed-by: Bryan C. Mills <bcmills@google.com>
Reviewed-by: Robert Griesemer <gri@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
2021-04-28 17:39:34 +00:00
.github .github: add link to questions in ISSUE_TEMPLATE 2020-01-06 17:05:31 +00:00
api syscall: restore broken GetQueuedCompletionStatus signature but make it not crash 2021-02-24 23:35:00 +00:00
doc doc: change <a/> to </a> in spec 2021-04-27 04:44:55 +00:00
lib/time lib/time, time/tzdata: update tzdata to 2021a 2021-01-25 16:08:46 +00:00
misc misc/cgo/testso, misc/cgo/testsovar: fix for Windows 2021-04-23 21:48:41 +00:00
src cmd/gofmt: simplify arg handling 2021-04-28 17:39:34 +00:00
test cmd/compile: use desired register only if it satisfies register mask 2021-04-28 16:13:40 +00:00
.gitattributes all: treat all files as binary, but check in .bat with CRLF 2020-06-08 15:31:43 +00:00
.gitignore internal/buildcfg: move build configuration out of cmd/internal/objabi 2021-04-16 19:20:53 +00:00
AUTHORS A+C: add new e-mail addresses for Andy Pan 2021-03-12 02:56:04 +00:00
CONTRIBUTING.md all: restore changes from faulty merge/revert 2018-02-12 20:13:59 +00:00
CONTRIBUTORS A+C: add new e-mail addresses for Andy Pan 2021-03-12 02:56:04 +00:00
LICENSE doc: revert copyright date to 2009 2016-06-01 22:40:04 +00:00
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SECURITY.md SECURITY.md: update go versions 2019-09-26 15:34:57 +00:00
codereview.cfg codereview.cfg: add codereview.cfg for master branch 2021-02-19 18:44:53 +00:00

README.md

The Go Programming Language

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