Add Bash installer (#34)

.github/workflows/install.yml

@@ -0,0 +1,18 @@
+name: Installer tests
+on:
+  push:
+    branches: [main]
+  pull_request:
+    types: [opened, synchronize]
+
+jobs:
+  test:
+    name: Run the installer
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os: [ubuntu-latest, macos-latest]
+    steps:
+      - uses: actions/checkout@v2
+      - run: bash bin/install.sh
+      - run: eas --version

.github/workflows/test.yml

@@ -14,12 +14,11 @@ jobs:
     name: Test with Node ${{ matrix.node }}
     steps:
       - uses: actions/checkout@v2
-        with:
-          fetch-depth: 1
       - name: Setup node
         uses: actions/setup-node@v1
         with:
           node-version: ${{ matrix.node }}
       - run: yarn install --frozen-lockfile --check-files
       - run: yarn test
       - run: yarn lint
+      - run: shellcheck bin/*.sh

bin/install.sh

@@ -0,0 +1,131 @@
+#!/bin/bash
+
+# This script downloads the latest release version of EAS CLI from GitHub and
+# installs it in /usr/local/bin
+
+{
+  # All code is inside a block to ensure the script executes only when
+  # downloaded completely.
+
+  set -euo pipefail
+
+  prefix="${EAS_PREFIX:-/usr/local}"
+  temp_dir="$(mktemp -d)"
+
+  if  [ -t 1 ] && [ -z "$NO_COLOR" ]
+  then
+    # Use colors when stdout is a terminal and NO_COLOR isn't set.
+    text_bold=$'\033[1m'
+    text_normal=$'\033[22m'
+    text_red=$'\033[31m'
+    text_default_color=$'\033[39m'
+  else
+    # Disable colors
+    text_bold=""
+    text_normal=""
+    text_red=""
+    text_default_color=""
+  fi
+
+  abort() {
+    echo -e "$text_bold$text_red$1$text_normal$text_default_color"
+    exit 1
+  }
+
+  install() {
+    needs_sudo=""
+    # Make sure path exists and can be written to by the current user.
+    if ! mkdir -p "$prefix/lib" || [[ ! -w "$prefix/lib" ]]
+    then
+      needs_sudo=true
+    fi
+    if ! mkdir -p "$prefix/bin" || [[ ! -w "$prefix/bin" ]]
+    then
+      needs_sudo=true
+    fi
+    if ! rm -rf "$prefix/lib/eas"
+    then
+      needs_sudo=true
+    fi
+    # Run commands with sudo if necessary.
+    if [ -n "$needs_sudo" ]
+    then
+      if [ "$EUID" -ne 0 ]
+      then
+        echo "Installing requires superuser access."
+        echo "The sudo command will prompt for your password."
+      fi
+      sudo rm -rf "$prefix/lib/eas"
+      sudo mv "$temp_dir/eas" "$prefix/lib/eas"
+      sudo ln -fs "$prefix/lib/eas/bin/eas" "$prefix/bin/eas"
+    else
+      mv "$temp_dir/eas" "$prefix/lib/eas"
+      ln -fs "$prefix/lib/eas/bin/eas" "$prefix/bin/eas"
+    fi
+  }
+
+  if [[ ! ":$PATH:" == *":$prefix/bin:"* ]]; then
+    abort "Your path is missing $prefix/bin, you need to add this to \$PATH use this installer."
+  fi
+
+  hardware="$(uname -m)"
+  case "$hardware" in
+    x86_64)
+      arch="x64"
+      ;;
+    arm*)
+      arch="arm"
+      ;;
+    *)
+      abort "Unsupported CPU architecture $hardware."
+      ;;
+  esac
+
+  case "$(uname -s)" in
+    Darwin*)
+      platform="darwin"
+      if [[ "$arch" != "x64" ]]; then
+        abort "Unsupported CPU architecture $hardware on macOS."
+      fi
+      ;;
+    Linux*)
+      platform="linux"
+      ;;
+    *)
+      abort "This installer is supported only on macOS, Linux, and Windows Subsystem for Linux."
+      ;;
+  esac
+
+  url="https://github.com/expo/eas-cli/releases/latest/download/eas-$platform-$arch.tar.gz"
+  echo "Installing EAS CLI from $url"
+
+  mkdir -p "$temp_dir"
+  cd "$temp_dir"
+
+  echo
+  echo "Downloading..."
+  if [ "$(command -v curl)" ]
+  then
+    curl --location --progress-bar "$url" | tar xz
+  else
+    wget -O- "$url" | tar xz
+  fi
+
+  # Move the installation over and link the executable (may require sudo)
+  install
+
+  # Test the bundled node binary and if it doesn't work remove it (fall back to
+  # node installed in path).
+  "$prefix/lib/eas/bin/node" -v > /dev/null || {
+    rm "$prefix/lib/eas/bin/node"
+  }
+
+  # Test the CLI
+  executable=$(command -v eas) || abort "Could not run eas after installation."
+  echo
+  echo -e "EAS CLI is installed to ${executable}"
+  eas --version
+
+  echo
+  echo -e "Type ${text_bold}eas --help${text_normal} to get started."
+}