How to get git hash in build.rs ?

[enomado]

Hi

Here is my Cross.toml

[target.x86_64-pc-windows-gnu]
pre-build = [
    "dpkg --add-architecture $CROSS_DEB_ARCH",
    "apt update",
    # tls
    "apt install --assume-yes nasm",
    # protobuf
    "apt install --assume-yes protobuf-compiler:$CROSS_DEB_ARCH",
    "apt install --assume-yes openssl",
    "apt install --assume-yes git",
    
]

I'm trying

    let hash = Command::new("git").args(&["rev-parse", "HEAD"]).output()?;
    let git_hash = String::from_utf8(hash.stdout)?;

    p!("BUILD.rs -> git hash ...{}", git_hash);

It emits empty string.

I also tried vergen_git2 and apt install --assume-yes libgit2, but result is pretty the same - it cant find repo, or so.

[Emilgardis]

Im guessing theres some output in stderr? This is probably a file ownership problem. If it is, see #1473 (reply in thread)

[enomado]

Looks like a found a problem.

stderr was fatal: not a git repository (or any parent up to mount point /home/sc/t/bur)

real problem was what my repo is not equal to workspace root.
I have something like

git_repo
    .git
    my_rust_project

when I run cross build, my pwd is git_repo/my_rust_project, so I have mounted only my_rust_project, and ./../.git is not accessible.

Is there any way to set mount point as ./../, or should I reorganize my repository?

[enomado]

looks like I found an answer #1294

But i cant get how lets say FTL_DIR can help me

[enomado]

got it

it'll be mounted in the container at the same path as on the host.