Linux installer for flow

getflow.sh

#!/bin/sh

# Linux x64 install for Facebook's flow JS type checker (flowtype.org). Flow
# will be installed to the local directory, replacing any previous versions
# placed here by this script.

ZIP=flow-linux64-latest.zip
URL=http://flowtype.org/downloads/$ZIP
BINDIR=flow

# Remove older installation artifacts
test -f "$ZIP" && rm "$ZIP"
test -d "$BINDIR" && rm -rf "$BINDIR"

echo 'Just a moment...'

curl -sO "$URL" \
  && unzip -q "$ZIP" \
  && echo "Flow is installed. Add it to your current path with:

    $ export PATH=\$PATH:`pwd`/$BINDIR
" \
  && exit 0;

echo 'Unable to install flow!'