Can't run binary from within python aws lambda function

Question

I am trying to run this tool within a lambda function: https://github.com/nicolas-f/7DTD-leaflet

The tool depends on Pillow which depends on imaging libraries not av

Answer 1

I know I'm a bit late for this but if you want a more generic way of doing this (for instance if you have a lot of binaries and might not use them all), this how I do it, provided you put all your binaries in a bin folder next to your py file, and all the libraries in a lib folder :

import shutil
import time
import os
import subprocess

LAMBDA_TASK_ROOT = os.environ.get('LAMBDA_TASK_ROOT', os.path.dirname(os.path.abspath(__file__)))
CURR_BIN_DIR = os.path.join(LAMBDA_TASK_ROOT, 'bin')
LIB_DIR = os.path.join(LAMBDA_TASK_ROOT, 'lib')
### In order to get permissions right, we have to copy them to /tmp
BIN_DIR = '/tmp/bin'

# This is necessary as we don't have permissions in /var/tasks/bin where the lambda function is running
def _init_bin(executable_name):
    start = time.clock()
    if not os.path.exists(BIN_DIR):
        print("Creating bin folder")
        os.makedirs(BIN_DIR)
    print("Copying binaries for "+executable_name+" in /tmp/bin")
    currfile = os.path.join(CURR_BIN_DIR, executable_name)
    newfile  = os.path.join(BIN_DIR, executable_name)
    shutil.copy2(currfile, newfile)
    print("Giving new binaries permissions for lambda")
    os.chmod(newfile, 0775)
    elapsed = (time.clock() - start)
    print(executable_name+" ready in "+str(elapsed)+'s.')

# then if you're going to call a binary in a cmd, for instance pdftotext :

_init_bin('pdftotext')
cmdline = [os.path.join(BIN_DIR, 'pdftotext'), '-nopgbrk', '/tmp/test.pdf']
subprocess.check_call(cmdline, shell=False, stderr=subprocess.STDOUT)