Building from a non-working directory does not include any files into the bundle

[Birne94]

We are using one repository which includes multiple lambda configurations.

/dummy
	config-1.yaml
	config-2.yaml
	handler.py
	requirements.txt
/foo
	config.yaml
	handler.py
	requirements.txt

I created a little script to create packages for each of the functions:

#!/usr/bin/env python

import aws_lambda
import os

_cwd = os.getcwd()


def build(name, config='config.yaml'):
    aws_lambda.build(
        os.path.join(_cwd, name),
        requirements=os.path.join(_cwd, name, 'requirements.txt'),
        config_file=os.path.join(_cwd, name, config)
    )


build('dummy', 'config-1.yaml')
build('dummy', 'config-2.yaml')
build('foo')

The resulting packages only contain the installed requirements, but not any of the lambda handler itself.

This is caused by the isfile check in aws_lambda.build. It assumes that the current directory is the source directory since it does not join the directory and filename (as done 6 lines below).

possible fix:

--- /tmp/a	2018-08-07 11:28:35.000000000 +0200
+++ /tmp/b	2018-08-07 11:28:40.000000000 +0200
@@ -327,16 +327,17 @@
 
     files = []
     for filename in os.listdir(src):
-        if os.path.isfile(filename):
+        abs_filename = os.path.join(src, filename)
+        if os.path.isfile(abs_filename):
             if filename == '.DS_Store':
                 continue
             if filename == config_file:
                 continue
             print('Bundling: %r' % filename)
-            files.append(os.path.join(src, filename))
+            files.append(abs_filename)
         elif os.path.isdir(filename) and filename in source_directories:
             print('Bundling directory: %r' % filename)
-            files.append(os.path.join(src, filename))
+            files.append(abs_filename)
 
     # "cd" into `temp_path` directory.
     os.chdir(path_to_temp)