create nixpacks install script

install.sh

@@ -0,0 +1,199 @@
+#!/bin/sh
+set -e
+
+#
+# Nixpacks
+#
+# This script is meant for quick installs via sh
+#   sh -c "$(curl -sSL https://github.com/railwayapp/nixpacks/blob/master/install.sh)"
+#
+
+INSTALL_DIR=${INSTALL_DIR:-"/usr/local/bin"}
+BINARY_NAME=${BINARY_NAME:-"nixpacks"}
+
+REPO_NAME="railwayapp/nixpacks"
+ISSUE_URL="https://github.com/railwayapp/nixpacks/issues/new"
+
+# Usage
+# get_latest_release "railwayapp/nixpacks"
+get_latest_release() {
+  curl --silent "https://api.github.com/repos/$1/releases/latest" | # Get latest release from GitHub api
+    grep '"tag_name":' |                                            # Get tag line
+    sed -E 's/.*"([^"]+)".*/\1/'                                    # Pluck JSON value
+}
+
+get_asset_name() {
+  echo "railway_$1_$2_$3.tar.gz"
+}
+
+get_download_url() {
+  local asset_name=$(get_asset_name $1 $2 $3)
+  echo "https://github.com/${REPO_NAME}/releases/download/v$1/${asset_name}"
+}
+
+command_exists() {
+  command -v "$@" >/dev/null 2>&1
+}
+
+fmt_error() {
+  echo ${RED}"Error: $@"${RESET} >&2
+}
+
+fmt_warning() {
+  echo ${YELLOW}"Warning: $@"${RESET} >&2
+}
+
+fmt_underline() {
+  echo "$(printf '\033[4m')$@$(printf '\033[24m')"
+}
+
+fmt_code() {
+  echo "\`$(printf '\033[38;5;247m')$@${RESET}\`"
+}
+
+setup_color() {
+  # Only use colors if connected to a terminal
+  if [ -t 1 ]; then
+    RED=$(printf '\033[31m')
+    GREEN=$(printf '\033[32m')
+    YELLOW=$(printf '\033[33m')
+    BLUE=$(printf '\033[34m')
+    MAGENTA=$(printf '\033[35m')
+    BOLD=$(printf '\033[1m')
+    RESET=$(printf '\033[m')
+  else
+    RED=""
+    GREEN=""
+    YELLOW=""
+    BLUE=""
+    MAGENTA=""
+    BOLD=""
+    RESET=""
+  fi
+}
+
+get_os() {
+  case "$(uname -s)" in
+    *linux* ) echo "linux" ;;
+    *Linux* ) echo "linux" ;;
+    *darwin* ) echo "darwin" ;;
+    *Darwin* ) echo "darwin" ;;
+  esac
+}
+
+get_machine() {
+  case "$(uname -m)" in
+    "x86_64"|"amd64"|"x64")
+      echo "amd64" ;;
+    "i386"|"i86pc"|"x86"|"i686")
+      echo "i386" ;;
+    "arm64"|"armv6l"|"aarch64")
+      echo "arm64"
+  esac
+}
+
+get_tmp_dir() {
+  echo $(mktemp -d)
+}
+
+do_checksum() {
+  checksum_url=$(get_checksum_url $version)
+  expected_checksum=$(curl -sL $checksum_url | grep $asset_name | awk '{print $1}')
+
+  if command_exists sha256sum; then
+    checksum=$(sha256sum $asset_name | awk '{print $1}')
+  elif command_exists shasum; then
+    checksum=$(shasum -a 256 $asset_name | awk '{print $1}')
+  else
+    fmt_warning "Could not find a checksum program. Install shasum or sha256sum to validate checksum."
+    return 0
+  fi
+
+  if [ "$checksum" != "$expected_checksum" ]; then
+    fmt_error "Checksums do not match"
+    exit 1
+  fi
+}
+
+do_install_binary() {
+  asset_name=$(get_asset_name $version $os $machine)
+  download_url=$(get_download_url $version $os $machine)
+
+  echo DOWNLOAD URL $download_url
+  exit 0
+
+  command_exists curl || {
+    fmt_error "curl is not installed"
+    exit 1
+  }
+
+  command_exists tar || {
+    fmt_error "tar is not installed"
+    exit 1
+  }
+
+  local tmp_dir=$(get_tmp_dir)
+
+  # Download tar.gz to tmp directory
+  echo "Downloading $download_url"
+  (cd $tmp_dir && curl -sL -O "$download_url")
+
+  (cd $tmp_dir && do_checksum)
+
+  # Extract download
+  (cd $tmp_dir && tar -xzf "$asset_name")
+
+  # Install binary
+  mv "$tmp_dir/$BINARY_NAME" $INSTALL_DIR
+  echo "Installed railway to $INSTALL_DIR"
+
+  # Cleanup
+  rm -rf $tmp_dir
+}
+
+main() {
+  setup_color
+
+  latest_tag=$(get_latest_release $REPO_NAME)
+  latest_version=$(echo $latest_tag | sed 's/v//')
+  version=${VERSION:-$latest_version}
+
+  os=$(get_os)
+  if test -z "$os"; then
+    fmt_error "$(uname -s) os type is not supported"
+    echo "Please create an issue so we can add support. $ISSUE_URL"
+    exit 1
+  fi
+
+  machine=$(get_machine)
+  if test -z "$machine"; then
+    fmt_error "$(uname -m) machine type is not supported"
+    echo "Please create an issue so we can add support. $ISSUE_URL"
+    exit 1
+  fi
+
+  do_install_binary
+
+  printf "$MAGENTA"
+  cat <<'EOF'
+                   .
+         /^\     .
+    /\   "V"
+   /__\   I      O  o             
+  //..\\  I     .                            Poof!
+  \].`[/  I
+  /l\/j\  (]    .  O
+ /. ~~ ,\/I          .               Railway is now installed
+ \\L__j^\/I       o              Run `railway help` for commands
+  \/--v}  I     o   .
+  |    |  I   _________                    
+  |    |  I c(`       ')o            
+  |    l  I   \.     ,/
+_/j  L l\_!  _//^---^\\_ 
+
+EOF
+  printf "$RESET"
+
+}
+
+main

uninstall.sh

@@ -0,0 +1,6 @@
+INSTALL_DIR="/usr/local/bin"
+BINARY_NAME="nixpacks"
+
+rm "$INSTALL_DIR/$BINARY_NAME"
+
+echo "Uninstalled Nixpacks"