x.py install fails when run outside of Rust source directory

[tmandry]

mkdir -p ~/staging/build
mv ~/rust/config.toml ~/staging/build
cd ~/staging/build
~/rust/x.py install

Fails with:

Install std stage2 (Some(TargetSelection { triple: "aarch64-fuchsia", file: None }))
sh: /usr/local/google/home/tmandry/staging/build/build/tmp/dist/rust-std-nightly-aarch64-fuchsia/install.sh: No such file or directory

And the build/tmp/dist directory does not exist. Here are the contents of ~/staging/build/build:

> tree -L 3 build
build
├── bootstrap
│   ├── CACHEDIR.TAG
│   └── debug
│       ├── bootstrap
│       ├── bootstrap.d
│       ├── build
│       ├── deps
│       ├── examples
│       ├── incremental
│       ├── libbootstrap.d
│       ├── libbootstrap.rlib
│       ├── llvm-config-wrapper
│       ├── llvm-config-wrapper.d
│       ├── rustc
│       ├── rustc.d
│       ├── rustdoc
│       ├── rustdoc.d
│       ├── sccache-plus-cl
│       └── sccache-plus-cl.d
├── cache
│   ├── 2020-11-18
│   │   ├── cargo-beta-x86_64-unknown-linux-gnu.tar.gz
│   │   ├── rustc-beta-x86_64-unknown-linux-gnu.tar.gz
│   │   └── rust-std-beta-x86_64-unknown-linux-gnu.tar.gz
│   └── 2020-11-19
│       └── rustfmt-nightly-x86_64-unknown-linux-gnu.tar.gz
├── dist
│   ├── rust-std-nightly-aarch64-fuchsia.tar.gz
│   └── rust-std-nightly-aarch64-fuchsia.tar.xz
├── tmp
│   ├── empty_dir
│   └── tarball
│       ├── rustc
│       └── rust-std
└── x86_64-unknown-linux-gnu
    ├── lld
    │   ├── bin
    │   ├── build
    │   ├── include
    │   ├── lib
    │   └── lld-finished-building
    ├── llvm
    │   ├── bin
    │   ├── build
    │   ├── include
    │   ├── lib
    │   ├── llvm-finished-building
    │   └── share
    ├── stage0
    │   ├── bin
    │   ├── etc
    │   ├── lib
    │   ├── manifest.in
    │   └── share
    ├── stage0-bootstrap-tools
    │   ├── CACHEDIR.TAG
    │   ├── release
    │   └── x86_64-unknown-linux-gnu
    ├── stage0-rustc
    │   ├── CACHEDIR.TAG
    │   ├── release
    │   └── x86_64-unknown-linux-gnu
    ├── stage0-std
    │   ├── release
    │   └── x86_64-unknown-linux-gnu
    ├── stage0-sysroot
    │   └── lib
    ├── stage0-tools-bin
    │   └── fabricate
    ├── stage1
    │   ├── bin
    │   └── lib
    ├── stage1-rustc
    │   ├── CACHEDIR.TAG
    │   ├── release
    │   └── x86_64-unknown-linux-gnu
    ├── stage1-std
    │   ├── release
    │   └── x86_64-unknown-linux-gnu
    ├── stage2
    │   ├── bin
    │   └── lib
    └── stage2-std
        ├── aarch64-fuchsia
        └── release

When run inside the Rust source dir, everything works.

[tmandry]

Looking back, this first started failing after #79788.

[Mark-Simulacrum]

cc @pietroalbini - I imagine this is a simple fix but needs to be tracked down

[pietroalbini]

I'll look tomorrow morning.

[pietroalbini]

The fix is #80514.

By the way, this bug was not related to being in the same directory as the source code or not. When you were on the same directory you were using an old copy of the needed files in the build directory.

[tmandry]

Ah, then thanks for the fix and sorry for the confusion!