Deprecates MacOS installation using the script in favor of Homeb… (#131)

* Deprecates MacOS installation using the script in favor of Homebrew

* Add the warning in the script

.ci/install.sh

@@ -2,18 +2,6 @@
 
 set -e
 
-OS=$(uname -s)
-
-if [ "$OS" == "Darwin" ]; then
-  FILENAME="fnm-macos"
-elif [ "$OS" == "Linux" ]; then
-  FILENAME="fnm-linux"
-else
-  echo "OS $OS is not supported."
-  echo "If you think that's a bug - please file an issue to https://github.com/Schniz/fnm/issues"
-  exit 1
-fi
-
 INSTALL_DIR="$HOME/.fnm"
 
 # Parse Flags
@@ -31,6 +19,11 @@ parse_args() {
       SKIP_SHELL="true"
       shift # past argument
       ;;
+    --force-install)
+      echo "\`--force-install\`: I hope you know what you're doing." >&2
+      FORCE_INSTALL="true"
+      shift
+      ;;
     *)
       echo "Unrecognized argument $key"
       exit 1
@@ -39,6 +32,29 @@ parse_args() {
   done
 }
 
+set_filename() {
+  local OS
+
+  OS=$(uname -s)
+
+  if [ "$OS" == "Linux" ]; then
+    FILENAME="fnm-linux"
+  elif [ "$OS" == "Darwin" ] && [ "$FORCE_INSTALL" == "true" ]; then
+    FILENAME="fnm-macos"
+  elif [ "$OS" == "Darwin" ]; then
+    echo "Hey! Thanks for trying fnm."
+    echo "MacOS installation works better using Homebrew."
+    echo "Please consider installing using:"
+    echo "    $ brew install Schniz/tap/fnm"
+    echo "or run the script again with the \`--force-install\` option."
+    exit 1
+  else
+    echo "OS $OS is not supported."
+    echo "If you think that's a bug - please file an issue to https://github.com/Schniz/fnm/issues"
+    exit 1
+  fi
+}
+
 download_fnm() {
   URL=https://github.com/Schniz/fnm/releases/latest/download/$FILENAME.zip
   DOWNLOAD_DIR=$(mktemp -d)
@@ -134,6 +150,7 @@ setup_shell() {
 }
 
 parse_args "$@"
+set_filename
 check_dependencies
 download_fnm
 if [ "$SKIP_SHELL" != "true" ]; then

README.md

@@ -36,7 +36,7 @@ For `bash`, `zsh` and `fish` shells, there's an [automatic installation script](
 curl -fsSL https://github.com/Schniz/fnm/raw/master/.ci/install.sh | bash
 ```
 
-### Upgrade 
+### Upgrade
 
 Upgrading `fnm` is almost the same as installing it. To prevent duplication in your shell config file add `--skip-shell` to install command.
 
@@ -50,6 +50,10 @@ Set a custom directory for fnm to be installed. The default is `$HOME/.fnm`.
 
 Skip appending shell specific loader to shell config file, based on the current user shell, defined in `$SHELL`. e.g. for Bash, `$HOME/.bashrc`. `$HOME/.zshrc` for Zsh. For Fish - `$HOME/.config/fish/config.fish`
 
+`--force-install`
+
+MacOS installations using the installation script are deprecated in favor of the Homebrew formula, but this forces the script to install using it anyway.
+
 Example:
 
 ```bash