Python – Using embedded python script in Makefile

makepython

I'm trying to run a Python snippet inside a Make target, but I'm having trouble trying to figure out how these things work in Make.

Here is my attempt so far:

define BROWSER_PYSCRIPT
import os, webbrowser, sys
try:
    from urllib import pathname2url
except:
    from urllib.request import pathname2url

webbrowser.open("file://" + pathname2url(os.path.abspath(sys.argv[1])))
endef
BROWSER := $(shell python -c '$(BROWSER_PYSCRIPT)')

I wanted to use $(BROWSER) in a target like:

docs:
    #.. compile docs
    $(BROWSER) docs/index.html

Is this really a bad idea?

Best Answer

You cannot recall a multi-line variable as is in a single recipe, it rather gets expanded to multiple recipes and causes syntax error.

A possible workaround would be:

export BROWSER_PYSCRIPT
BROWSER := python -c "$$BROWSER_PYSCRIPT"

docs:
        #.. compile docs
        $(BROWSER) docs/index.html

Related Solutions

Python – Invoke python script through make command

In python you get the commandline parameters from sys.argv so instead of

#!/usr/bin/env python
base_dir = /hard/coded/path

you do:

#!/usr/bin/env python
import sys
base_dir = sys.argv[1]

(putting in checks might be appropriate). If you explicitly start the program with python, you can leave out the first line, but it won't hurt to be there in case you make A.py executable, you will need it.

In your makefile you now can specify:

default:
        python A.py /hard/coded/path

(make sure you have a Tabbefore python, not 8 spaces.

And then you can run make (no need to do make makefile unless you have a Makefile or with Gnu make a GNUmakefile in the same directory)

Best Answer

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Python – Invoke python script through make command

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