v fails to run and generate binaries from / folder

[hholst80]

Describe the bug

The compiler will not generate a binary if it is invoked on a file in the root.

Reproduction Steps

/ # cat hello.v
fn main() {
	println("Hello, world!");
}
/ # /v/v hello.v
/ # ls -a
.           bin         foo         home        mnt         root        srv         usr
..          dev         hello.c     lib         opt         run         sys         v
.dockerenv  etc         hello.v     media       proc        sbin        tmp         var
/ # /v/v run hello.v
No such file or directory; code: 2
/ # 

Expected Behavior

It should compile a hello binary placed in / and it should run the code in the v run hello.v instance.

Current Behavior

Silent ignores to generate binary and No such file or directory; code 2 error message (not helpful)

Possible Solution

Fix the path assumptions that the source file is located in a sub directory.

Additional Information/Context

No response

V version

V 0.4.3 5306469

Environment details (OS name and version, etc.)

Docker container:

/ # cat /etc/os-release 
NAME="Alpine Linux"
ID=alpine
VERSION_ID=3.19.0
PRETTY_NAME="Alpine Linux v3.19"
HOME_URL="https://alpinelinux.org/"
BUG_REPORT_URL="https://gitlab.alpinelinux.org/alpine/aports/-/issues"
/ # 

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[shove70]

Indeed, the file is generated to /v/v/hello, is a bug.

[hholst80]

Looks like this was a regression from v0.4.3 (744b92a)

 docker run -it --rm thevlang/vlang:alpine sh
/src # cd /
/ # ln -s /opt/vlang/ v
/ # /v/v version
V 0.4.3 744b92a
/ # cat > hello.v
fn main() {
	println("Hello, world!");
}
/ # /v/v hello.v
/ # stat hello
  File: hello
  Size: 422360    	Blocks: 832        IO Block: 4096   regular file
Device: 6ah/106d	Inode: 1910023     Links: 1
Access: (0755/-rwxr-xr-x)  Uid: (    0/    root)   Gid: (    0/    root)
Access: 2024-05-03 21:37:37.429283373 +0000
Modify: 2024-05-03 21:37:37.440283274 +0000
Change: 2024-05-03 21:37:37.440283274 +0000
/ # /v/v run hello.v
Hello, world!
/ # 

[hholst80]

The bug:

import os
fn main() {
  p := os.join_path("/", "test")
  assert p == "/test"
}