Only show the shebang warning for .fish commands.
Use the phrase "interpreter directive" as the formal name for the
shebang.
Switch from windows to Windows for the operating system.
If you make a script called `foo` somewhere in $PATH, and did not give
it a shebang, this would end up calling
sh foo
instead of
sh /usr/bin/foo
which might not match up.
Especially if the path is e.g. `--version` or `-` that would end up
being misinterpreted *by sh*.
So instead we simply pass the actual_cmd to sh, because we need it
anyway to get it to fail to execute before.
The hope is that the noshebang test was fixed on old glibc
through e74b9d53df. Revert the previous optimistic attempts to
fix these through adding sleeps and subshells.
This reverts commit b3da0bd5a2.
This reverts commit 8a86d3452f.
This is an attempt to solve the test failures on Launchpad's CI.
I'm assuming when we do a redirection like
foo > file
and then try to execute `file` immediately afterwards, we either
haven't written it soon enough or closed the file, so we get a "text
file busy" error.
So, when we do that in a new fish the file should be closed once it
quits.
See #8021.
When you try to execute a file directly after you've written to it,
you might, on some systems, get a "text file busy" error.
So we unfortunately have to sleep to avoid it.
See #8021 for where this was added,
537b3f6cb1 for the same problem.
This cleans up some exit code processing. Previously a failed exec
would produce exit code 125 unconditionally, while a failed posix_spawn
would produce exit code 1 (!).
With this change, fish reports exit code 126 for not-executable, and 127
for file-not-found. This matches bash.
