Add CLI install script

This script automatically fetches and installs the latest Doppler CLI. It can be downloaded from https://cli.doppler.com/install.sh

scripts/install.sh

@@ -0,0 +1,192 @@
+#!/usr/bin/env sh
+
+set -e
+
+DEBUG=0
+CLEAN_EXIT=0
+CWD="$(pwd)"
+tempdir=""
+filename=""
+
+cleanup() {
+  exit_code=$?
+  if [ "$exit_code" -ne 0 ] && [ "$CLEAN_EXIT" -ne 1 ]; then
+    echo "ERROR: script failed during execution"
+
+    if [ "$DEBUG" -eq 0 ]; then
+      echo "For more verbose output, re-run this script with the debug arg (./install.sh debug)"
+    fi
+  fi
+
+  if [ ! -z "$tempdir" ]; then
+    delete_tempdir
+  fi
+
+  exit $exit_code
+}
+trap cleanup EXIT
+
+clean_exit() {
+  CLEAN_EXIT=1
+  exit $1
+}
+
+log_debug() {
+  if [ "$DEBUG" -eq 1 ]; then
+    echo "DEBUG: $1"
+  fi
+}
+
+delete_tempdir() {
+  log_debug "Removing temp directory"
+  rm -rf "$tempdir"
+  tempdir=""
+}
+
+if [ "$1" = "debug" ]; then
+  DEBUG=1
+fi
+
+# identify OS
+os="unknown"
+uname_os=$(uname -s)
+if [ "$uname_os" = "Darwin" ]; then
+  os="macos"
+elif [ "$uname_os" = "Linux" ]; then
+  os="linux"
+elif [ "$uname_os" = "FreeBSD" ]; then
+  os="freebsd"
+elif [ "$uname_os" = "OpenBSD" ]; then
+  os="openbsd"
+elif [ "$uname_os" = "NetBSD" ]; then
+  os="netbsd"
+else
+  echo "ERROR: Unsupported OS '$uname_os'"
+  clean_exit 1
+fi
+
+log_debug "Detected OS '$os'"
+
+# identify arch
+arch="unknown"
+uname_machine=$(uname -m)
+if [ "$uname_machine" = "i386" ] || [ "$uname_machine" = "i686" ]; then
+  arch="i386"
+elif [ "$uname_machine" = "amd64" ] || [ "$uname_machine" = "x86_64" ]; then
+  arch="amd64"
+elif [ "$uname_machine" = "armv6" ] || [ "$uname_machine" = "armv6l" ]; then
+  arch="armv6"
+elif [ "$uname_machine" = "armv7" ] || [ "$uname_machine" = "armv7l" ]; then
+  arch="armv7"
+# armv8?
+elif [ "$uname_machine" = "arm64" ]; then
+  arch="arm64"
+else
+  echo "ERROR: Unsupported architecture '$uname_machine'"
+  clean_exit 1
+fi
+
+log_debug "Detected architecture '$arch'"
+
+# identify format
+format="tar"
+if [ -x "$(command -v dpkg)" ]; then
+  format="deb"
+elif [ -x "$(command -v rpm)" ]; then
+  format="rpm"
+fi
+
+log_debug "Detected format '$format'"
+
+url="https://cli.doppler.com/download?os=$os&arch=$arch&format=$format"
+
+# download binary
+if [ -x "$(command -v curl)" ] || [ -x "$(command -v wget)" ]; then
+  tempdir="$(mktemp -d)"
+  log_debug "Using temp directory $tempdir"
+
+  echo "Downloading latest release"
+  file="doppler-download"
+  filename="$tempdir/$file"
+
+  if [ -x "$(command -v curl)" ]; then
+    log_debug "Using $(command -v curl)"
+    log_debug "Downloading from $url"
+    # ensure this command always succeeds
+    headers=$(curl --silent --retry 3 -o "$filename" -LN -D - "$url" || true)
+  else
+    log_debug "Using $(command -v wget)"
+    log_debug "Downloading from $url"
+    # ensure this command always succeeds
+    headers=$(wget -q -t 3 -S -O $filename "$url" 2>&1 || true)
+  fi
+
+  status=$(echo "$headers" | head -1 | sed -n 's/^[[:space:]]*HTTP.* \([0-9][0-9][0-9]\).*$/\1/p')
+  if [ "$status" -ne 302 ]; then
+    echo "ERROR: Download failed with status $status"
+
+    if [ "$status" -eq 404 ]; then
+      echo ""
+      echo "Please report this issue:"
+      echo "https://github.com/DopplerHQ/cli/issues/new?template=bug_report.md&title=[BUG]%20Unexpected%20404%20using%20CLI%20install%20script"
+    fi
+
+    clean_exit 1
+  fi
+else
+  echo "ERROR: You must have curl or wget installed"
+  clean_exit 1
+fi
+
+tag=$(echo "$headers" | sed -n 's/^[[:space:]]*x-cli-version: \(v[0-9]*\.[0-9]*\.[0-9]*\)[[:space:]]*$/\1/p')
+log_debug "Downloaded CLI $tag"
+
+if [ "$format" = "pkg" ]; then
+  mv -f "$filename" "$filename.pkg"
+  filename="$filename.pkg"
+
+  newfile="$CWD/doppler-${tag}-${arch}.pkg"
+  mv -f "$filename" "$newfile"
+
+  echo "Launching installer"
+  open "$newfile"
+elif [ "$format" = "deb" ]; then
+  mv -f "$filename" "$filename.deb"
+  filename="$filename.deb"
+
+  echo 'Installing...'
+  dpkg -i "$filename"
+  echo "Installed Doppler CLI $(doppler -v)"
+elif [ "$format" = "rpm" ]; then
+  mv -f "$filename" "$filename.rpm"
+  filename="$filename.rpm"
+
+  echo 'Installing...'
+  rpm -i --force "$filename"
+  echo "Installed Doppler CLI $(doppler -v)"
+elif [ "$format" = "tar" ]; then
+  mv -f "$filename" "$filename.tar.gz"
+  filename="$filename.tar.gz"
+
+  # extract
+  extract_dir="$tempdir/x"
+  mkdir "$extract_dir"
+  log_debug "Extracting tarball to $extract_dir"
+  tar -xzf "$filename" -C "$extract_dir"
+
+  # set appropriate perms
+  chown "$(id -u):$(id -g)" "$extract_dir/doppler"
+  chmod 755 "$extract_dir/doppler"
+
+  # install
+  echo 'Installing...'
+  log_debug "Moving binary to /usr/local/bin"
+  mv -f "$extract_dir/doppler" /usr/local/bin
+  if [ ! -x "$(command -v doppler)" ]; then
+    log_debug "Binary not in PATH, moving to /usr/bin"
+    mv -f /usr/local/bin/doppler /usr/bin/doppler
+  fi
+
+  delete_tempdir
+  echo "Installed Doppler CLI $(doppler -v)"
+fi