Download and set nightly channel on juliaup

juliaup_update_nightly.sh

#!/bin/bash

# Adapted from https://github.com/JuliaLang/juliaup/issues/96#issuecomment-1480110471

# Set variables for directories and files
JULIA_DIR="$HOME/.julia/juliaup/julia-nightly"
TMP_FILE="/tmp/julia-nightly.tar.gz"
JULIA_NIGHTLY_URL="https://julialangnightlies-s3.julialang.org/bin/linux/x86_64/julia-latest-linux-x86_64.tar.gz"

# Download the nightly Julia build
if wget -O $TMP_FILE $JULIA_NIGHTLY_URL; then
    # Download successful; Remove the old nightly build
    rm -rf $JULIA_DIR

    # Set up the new nightly build
    mkdir -p $JULIA_DIR
    tar -xf $TMP_FILE -C $JULIA_DIR --strip-components=1

    # Clean up temporary files
    rm $TMP_FILE

    echo "Julia nightly update successful."

    # Allow linking to fail if already exists
    juliaup link nightly "$JULIA_DIR/bin/julia" || true
else
    # Download failed; report the error
    echo "Error: Failed to download Julia nightly build."
    exit 1
fi