How to get watchman and make to play together.

i.csv

i.geojson

{
 "type": "FeatureCollection",
  "features": [
    {
      "type": "Feature",
      "properties": {
        "id": "1",
        "name": "One"
      },
      "geometry": {
        "type": "Point",
        "coordinates": [
          -67.727002,
          44.949998
        ]
      }
    },
    {
      "type": "Feature",
      "properties": {
        "id": "2",
        "name": "Two"
      },
      "geometry": {
        "type": "Point",
        "coordinates": [
          -68.056075,
          45.031446
        ]
      }
    }
  ]
}

make.py

from subprocess import call

def make():
    call(['make'])

if __name__ == '__main__':
    make()

Makefile

all: \
 i.geojson
 
# create geojson from csv
i.geojson: i.csv
  csv2geojson $< > $@

watch:
  watchman watch $(shell pwd)
  watchman -- trigger $(shell pwd) rebuild '*.csv' -- python $(shell pwd)/make.py