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Bryan C. Mills 07d4de9312 os/exec: fix edge cases in Windows PATH resolution
- Ignore empty entries in PATH, like PowerShell does.

- If we resolve a path using an explicit relative entry in PATH,
  treat it the same as we do for the implicit "." search path,
  by allowing a later (absolute) PATH entry that resolves to the
  same executable to return the absolute version of its path.

- If the requested path does not end with an extension matching
  PATHEXT, return ErrNotFound (indicating that we potentially searched
  for multiple alternatives and did not find one) instead of
  ErrNotExist (which would imply that we know the exact intended path
  but couldn't find it).

Fixes #61493.

Change-Id: I5b539d8616e3403825749d8eccf46725fa808a17
Cq-Include-Trybots: luci.golang.try:gotip-linux-amd64-race,gotip-windows-amd64-race,gotip-windows-amd64-longtest
Reviewed-on: https://go-review.googlesource.com/c/go/+/528037
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Auto-Submit: Bryan Mills <bcmills@google.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>
2023-09-13 19:38:10 +00:00
.github .github: fix templates with multiple labels 2023-07-31 18:28:27 +00:00
api archive/tar: add AddFS method to Writer 2023-09-13 13:59:01 +00:00
doc reflect: make Value.IsZero identical to v == zero 2023-09-01 23:20:30 +00:00
lib/time lib/time: update to 2023c/2023c 2023-05-03 20:14:11 +00:00
misc os: add tests for UserCacheDir and UserConfigDir 2023-08-21 17:46:57 +00:00
src os/exec: fix edge cases in Windows PATH resolution 2023-09-13 19:38:10 +00:00
test cmd/compile: sparse conditional constant propagation 2023-09-12 21:01:50 +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/platform,cmd/dist: export the list of supported platforms 2023-06-22 19:44:52 +00:00
codereview.cfg codereview.cfg: add codereview.cfg for master branch 2021-02-19 18:44:53 +00:00
CONTRIBUTING.md doc: normalize proposal-process links 2023-03-29 22:00:27 +00:00
go.env cmd/go: additional doc-inspired tests and bug fixes 2023-06-06 19:18:46 +00:00
LICENSE
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README.md README: update from CC-BY-3.0 to CC-BY-4.0 2022-11-02 20:14:56 +00:00
SECURITY.md SECURITY.md: replace golang.org with go.dev 2022-04-26 19:59:47 +00:00

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