vendor-std.sh

vendor-std.sh

#/!bin/bash

# Vendors a project with the additional dependencies to build with `-Zbuild-std`
#
# The main problem is that Cargo won't naively see the lockfile for
# the Rust workspace in the `rust-src` component. To fix this, we
# just copy the lock to `test`, which we then pull in with vendor's 
# `-s` flag.

# In case you need a specific nightly for your build
# e.g. nightly-2020-03-10
NIGHTLY_VER=nightly

# Dir structure changed, not sure what date this is yet!
# Anything from october onward seems fine.
OLD_NIGHTLY=0 

# Need the rust-src component installed for this toolchain
rustup toolchain install $NIGHTLY_VER --force --component rust-src   
rustc "+"$NIGHTLY_VER -V

TOOLCHAIN_PATH=$(rustc "+"$NIGHTLY_VER --print sysroot)
RUST_SRC=$TOOLCHAIN_PATH/lib/rustlib/src/rust/
RUST_LOCK=$RUST_SRC/Cargo.lock

if ["$OLD_NIGHTLY" = "1"] ; then
RUST_TEST=$RUST_SRC/library/test/
else
RUST_TEST=$RUST_SRC/src/libtest/    
fi

RUST_TEST_TOML=$RUST_TEST/Cargo.toml

# Copy the Cargo.lock for Rust to places `vendor` will see
cp $RUST_LOCK $RUST_TEST

# Actually do the vendor
cargo "+"$NIGHTLY_VER vendor -s $RUST_TEST_TOML

# You can now use build-std in a vendor like (substitute your own target triple):
# cargo "+"$NIGHTLY_VER build -Zbuild-std --target=x86_64-pc-windows-msvc

# If you compile with panic=abort, use this instead
# cargo "+"$NIGHTLY_VER build -Zbuild-std=panic_abort,std --target=x86_64-pc-windows-msvc