self-contained, executable app slug creator

running.sh

$ mkdir helloworld
$ cd helloworld
$ git init .
$ virtualenv .venv
$ .venv/bin/pip install Flask
$ echo "*.pyc" > .gitignore
$ cat <<EOF > app.py
from os import getenv
from flask import Flask

app = Flask(__name__)

@app.route("/")
def root():
    return "Hello World!"

if __name__ == '__main__':
    app.run(
        port=int(getenv('PORT', 5000)),
        debug=getenv('DEBUG') == "true")
EOF
$ git add .
$ git commit -m "initial commit"
$ slugify.sh .
$ ./run
 * Running on http://127.0.0.1:5000/ (Press CTRL+C to quit)

slugify.sh

#!/bin/bash
#
#
cat <<- "EOF" > run
#!/bin/bash
SKIP="$(awk '/^__COMPRESSED__/ { print NR + 1; exit 0; }' $0)"
cd "$(dirname $1)"
rm -rf extract
mkdir -p extract
tail -n +"$SKIP" "$1" | tar -zx -C extract
exec extract/.venv/bin/python app.py
__COMPRESSED__
EOF
git archive HEAD | gzip >> run
chmod +x run