rust-root

#!/bin/bash

DIR="$PWD"
while [[ "$DIR" != "/" && "$DIR" != "$HOME" ]]; do
    if [[ -r "$DIR/src/libsyntax/syntax.rc" ]]; then
       echo "$DIR"
       exit 0
    fi
    DIR=$(dirname "$DIR")
done

echo "/no/rust/root/found"
exit 1

rustc

#!/bin/bash

R=$($(dirname $0)/rustc-path)
if [[ -x "$R" ]]; then
  echo > /dev/stderr Running "$R":
  "$R" "$@"
  exit $?
fi

echo > /dev/stderr "ERROR: Could not find an appropriate rustc to execute from dir $PWD!"
exit 1

rustc-path

#!/bin/bash
#
# Script which finds an appropriate rustc to execute based on the current
# directory.  We begin by walking up the set of directories until we find
# one that contains "src/comp/rustc.rc".  

# Walk up directories looking for the main rust directory.  Don't walk
# past the home directory of the current user, just seems unsanitary.

if [ -z "$1" ]; then
    STAGES="stage2 stage1"
else
    STAGES="$1"
fi

DIR=$(rust-root)
for stage in ${STAGES}; do
    # Use glob to search through all architectures. 
    # But if some stage doesn't exist, then
    # the glob will keep the "*" rather than return the
    # empty set, so we have to check within the for loop
    # too.
    for rustc in "$DIR"/build/*/$stage/bin/rustc; do
        if [[ -x "$rustc" ]]; then
            echo "$rustc"
            exit 0
        fi
    done
done

# Fallback to /usr/local/bin/rustc, if any:
echo /usr/local/bin/rustc
exit 0