mktemp: add message for directory not found

[jfinkels]

Add special handling in mktemp for when the directory that will
contain the temporary file is not found. This situation now produces
the message

mktemp: failed to create file via template 'XXX': No such file or directory

to match the behavior of GNU mktemp.

This fixes the test case pipe-bad-tmpdir in the GNU test suite file tests/misc/mktemp.pl.

[sylvestre]

I guess you saw:

---- test_mktemp::test_nonexistent_dir_prefix stdout ----
current_directory_resolved: 
run: D:\a\coreutils\coreutils\target\debug\coreutils.exe mktemp d/XXX
thread 'test_mktemp::test_nonexistent_dir_prefix' panicked at 'Command was expected to fail.
stdout = dwIl

 stderr = ', tests\common\util.rs:187:9

---- test_mktemp::test_nonexistent_tmpdir_env_var stdout ----
current_directory_resolved: 
run: D:\a\coreutils\coreutils\target\debug\coreutils.exe mktemp
thread 'test_mktemp::test_nonexistent_tmpdir_env_var' panicked at 'assertion failed: `(left == right)`

Diff < left / right > :
<mktemp: failed to create file via template 'C:\Users\RUNNER~1\AppData\Local\Temp\.tmpg3E5LO\no\such\dir\tmp.XXXXXXXXXX': No such file or directory
>mktemp: failed to create file via template 'no/such/dir/tmp.XXXXXXXXXX': No such file or directory

[jfinkels]

More Windows issues, of course :) I'll look into it

[sylvestre]

I guess you saw:

failures:

---- test_mktemp::test_nonexistent_dir_prefix stdout ----
current_directory_resolved: 
run: D:\a\coreutils\coreutils\target\x86_64-pc-windows-msvc\debug\coreutils.exe mktemp d\XXX
current_directory_resolved: 
run: D:\a\coreutils\coreutils\target\x86_64-pc-windows-msvc\debug\coreutils.exe mktemp -d d\XXX
thread 'test_mktemp::test_nonexistent_dir_prefix' panicked at 'mktemp: failed to create directory via template 'd\XXX': No such file or directory
', D:\a\coreutils\coreutils\tests\by-util\test_mktemp.rs:812:9

---- test_mktemp::test_nonexistent_tmpdir_env_var stdout ----
current_directory_resolved: 
run: D:\a\coreutils\coreutils\target\x86_64-pc-windows-msvc\debug\coreutils.exe mktemp
thread 'test_mktemp::test_nonexistent_tmpdir_env_var' panicked at 'mktemp: failed to create file via template 'C:\Users\RUNNER~1\AppData\Local\Temp\.tmpIKFkAF\no\such\dir\tmp.XXXXXXXXXX': No such file or directory
', D:\a\coreutils\coreutils\tests\by-util\test_mktemp.rs:753:9

[jfinkels]

Warning: Congrats! The gnu test tests/misc/mktemp is no longer failing!