Download the latest release from the github repo

download_latest_release.sh

#!/bin/bash

# Check if jq is installed
if ! command -v jq &> /dev/null; then
    echo "jq is required but it's not installed. Please install jq first."
    exit 1
fi

# Check if curl is installed
if ! command -v curl &> /dev/null; then
    echo "curl is required but it's not installed. Please install curl first."
    exit 1
fi

# Check if repository and owner names are provided
if [ -z "$1" ]; then
    echo "Usage: $0 <owner>/<repository>"
    exit 1
fi

repo_owner_repo=$1

# Get the download URL of the latest release
download_url=$(curl -sL "https://api.github.com/repos/$repo_owner_repo/releases/latest" | \
    jq -r '.assets[].browser_download_url' | \
    grep -i "$(uname -s)" | \
    grep -i amd)

# Check if a download URL is found
if [ -z "$download_url" ]; then
    echo "Failed to retrieve the download URL of the latest release."
    exit 1
fi

# Determine the file name from the download URL
file_name=$(basename "$download_url")

# Check if $HOME/bin exists, if not, create it
bin_dir="$HOME/bin"
if [ ! -d "$bin_dir" ]; then
    mkdir -p "$bin_dir"
fi

# Check if the file already exists
if [ -f "$bin_dir/$file_name" ]; then
    read -p "File $file_name already exists. Do you want to replace it? (y/n): " replace_file
    if [ "$replace_file" != "y" ]; then
        echo "Operation canceled by user."
        exit 0
    fi
fi

# Download the latest release
echo "Downloading the latest release from: $download_url"
curl -LO "$download_url"

# Move the downloaded file to $HOME/bin
mv "$file_name" "$bin_dir/"

# Set executable permissions for the file
chmod +x "$bin_dir/$file_name"

# Calculate checksums of the downloaded file
md5sum=$(md5sum "$bin_dir/$file_name" | awk '{print $1}')
sha1sum=$(sha1sum "$bin_dir/$file_name" | awk '{print $1}')
sha256sum=$(sha256sum "$bin_dir/$file_name" | awk '{print $1}')

# Print checksums in tabular format
printf "\nChecksums:\n"
printf "+------------+----------------------------------+\n"
printf "| Algorithm  | Checksum                         |\n"
printf "+------------+----------------------------------+\n"
printf "| MD5        | %-32s |\n" "$md5sum"
printf "| SHA1       | %-40s |\n" "$sha1sum"
printf "| SHA256     | %-64s |\n" "$sha256sum"
printf "+------------+----------------------------------+\n"

# Run the version command
"$bin_dir/$file_name" version

#### How to run
## $ ./download_latest_release.sh bazelbuild/bazelisk
##