Add installation script (#23)

curl into bash

.ci/install.sh

@@ -0,0 +1,115 @@
+#!/bin/bash
+
+OS=$(uname -a | cut -d" " -f 1)
+
+if [ "$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
+
+get_latest_release() {
+  # Taken from https://gist.github.com/lukechilds/a83e1d7127b78fef38c2914c4ececc3c
+  curl --silent "https://api.github.com/repos/$1/releases/latest" | # Get latest release from GitHub api
+    grep '"tag_name":' |                                            # Get tag line
+    sed -E 's/.*"([^"]+)".*/\1/'                                    # Pluck JSON value
+}
+
+download_fnm() {
+  LATEST_RELEASE=$(get_latest_release Schniz/fnm)
+  URL=https://github.com/Schniz/fnm/releases/download/$LATEST_RELEASE/$FILENAME.zip
+  DOWNLOAD_DIR=$(mktemp -d)
+
+  echo "Downloading $URL..."
+
+  mkdir -p $HOME/.fnm &> /dev/null
+  curl --progress-bar -L $URL -o $DOWNLOAD_DIR/$FILENAME.zip
+  unzip -q $DOWNLOAD_DIR/$FILENAME.zip -d $DOWNLOAD_DIR
+  mv $DOWNLOAD_DIR/$FILENAME/fnm $HOME/.fnm/fnm
+  chmod u+x $HOME/.fnm/fnm
+}
+
+check_dependencies() {
+  echo "Checking dependencies for the installation script..."
+
+  echo -n "Checking availablity of curl... "
+  if hash curl 2>/dev/null; then
+    echo "OK!"
+  else
+    echo "Missing!"
+    SHOULD_EXIT="true"
+  fi
+
+  echo -n "Checking availablity of unzip... "
+  if hash unzip 2>/dev/null; then
+    echo "OK!"
+  else
+    echo "Missing!"
+    SHOULD_EXIT="true"
+  fi
+
+  if [ "$SHOULD_EXIT" = "true" ]; then
+    exit 1
+  fi
+}
+
+setup_shell() {
+  CURRENT_SHELL=$(basename $SHELL)
+
+  if [ "$CURRENT_SHELL" == "zsh" ]; then
+    CONF_FILE=$HOME/.zshrc
+    echo "Installing for Zsh. Appending the following to $CONF_FILE:"
+    echo ""
+    echo '  # fnm'
+    echo '  export PATH=$HOME/.fnm:$PATH'
+    echo '  eval `fnm env`'
+
+    echo '' >> $CONF_FILE
+    echo '# fnm' >> $CONF_FILE
+    echo 'export PATH=$HOME/.fnm:$PATH' >> $CONF_FILE
+    echo 'eval `fnm env`' >> $CONF_FILE
+
+  elif [ "$CURRENT_SHELL" == "fish" ]; then
+    CONF_FILE=$HOME/.config/fish/config.fish
+    echo "Installing for Fish. Appending the following to $CONF_FILE:"
+    echo ""
+    echo '  # fnm'
+    echo '  set PATH $HOME/.fnm $PATH'
+    echo '  eval (fnm env --fish)'
+
+    echo '' >> $CONF_FILE
+    echo '# fnm' >> $CONF_FILE
+    echo 'set PATH $HOME/.fnm $PATH' >> $CONF_FILE
+    echo 'eval (fnm env --fish)' >> $CONF_FILE
+
+  elif [ "$CURRENT_SHELL" == "bash" ]; then
+    CONF_FILE=$HOME/.bashrc
+    echo "Installing for Bash. Appending the following to $CONF_FILE:"
+    echo ""
+    echo '  # fnm'
+    echo '  export PATH=$HOME/.fnm:$PATH'
+    echo '  eval `fnm env`'
+
+    echo '' >> $CONF_FILE
+    echo '# fnm' >> $CONF_FILE
+    echo 'export PATH=$HOME/.fnm:$PATH' >> $CONF_FILE
+    echo 'eval `fnm env`' >> $CONF_FILE
+
+  else
+    echo "Could not infer shell type. Please set up manually."
+    exit 1
+  fi
+
+  echo ""
+  echo "In order to apply the changes, open a new terminal or run the following command:"
+  echo ""
+  echo "  source $CONF_FILE"
+}
+
+check_dependencies
+download_fnm
+setup_shell

README.md

@@ -19,6 +19,16 @@
 
 ## Installation
 
+### Using a script
+
+For `bash`, `zsh` and `fish` shells, there's an [automatic installation script](./.ci/install.sh):
+
+```bash
+curl https://raw.githubusercontent.com/Schniz/fnm/master/.ci/install.sh | bash
+```
+
+### Manually
+
 * Download the [latest release binary](https://github.com/Schniz/fnm/releases) for your system
 * Make it available globally on `$PATH`
 * Add the following line to your `.bashrc`/`.zshrc` file:
@@ -58,7 +68,6 @@ Lists the Node versions available to download remotely.
 Prints the required shell commands in order to configure your shell, Bash compliant by default. Provide `--fish` to output the Fish-compliant version.
 
 ## Future Plans
-- [ ] Add a simpler way of installing it (`curl | bash`?)
 - [ ] Feature: make versions complete the latest: `10` would infer the latest minor and patch versions of node 10. `10.1` would infer the latest patch version of node 10.1
 - [ ] Feature: `fnm use --install`, `fnm use --quiet`
 - [ ] Feature: `fnm install lts`?