#!/usr/bin/env python2.6
"""Copy data files to final html directory.
"""

#-----------------------------------------------------------------------------
# Imports
#-----------------------------------------------------------------------------
from __future__ import print_function

import __builtin__
import os
import sys

from os.path import join as pjoin

#-----------------------------------------------------------------------------
# Config
#-----------------------------------------------------------------------------

# From sphinx conf.py
sphinx_conf = {}
execfile('conf.py',{},sphinx_conf)

# Local
verbose = False
#verbose = True

# Directory with source files
src_dir = '.'
# Directory where final html tree is built
out_dir = '_build/html'

# Prefix of directories to skip (set when sphinx-quickstart was run)
skip_prefix = '_'
skip_extensions = set(['.rst'])
# Other directory trees to skip
skip_trees = set(['.git','sphinxext', 'resources', 'attic','blog'])

# Always skip source files, since shpinx already copies those
skip_extensions.add(sphinx_conf.get('source_suffix','.rst'))

# Any top-level files that may need to be copied as well
top_files = ['links.txt']

#-----------------------------------------------------------------------------
# Functions
#-----------------------------------------------------------------------------

def print(*args, **kw):
    verb = kw.pop('verbose', verbose)
    if verb:
        __builtin__.print(*args, **kw)


def keep_filename(f, skip_ext=skip_extensions):
    """Return whether to keep a file based on a list of extensions.

    Note that filenames ending in ~ are always excluded."""

    if f.endswith('~'):
        return False

    return os.path.splitext(f)[1] not in skip_ext
    

def copy_files(root, files):
    did_copy = False
    for fname in files:
        target = pjoin(out_dir, root, fname)
        if not (os.path.isfile(target) or os.path.islink(target)):
            print(target, end='')
            os.link(pjoin(root, fname), target)
            did_copy = True
    if did_copy:
        print()
    

def main():
    if not os.path.isdir(out_dir):
        err = 'ERROR: Output directory {0} not found.'.format(out_dir)
        print(err, file=sys.stderr, verbose=True)
        sys.exit(1)
    
    skip_base = pjoin(src_dir, skip_prefix)

    for root, dirs, files in os.walk(src_dir, followlinks=True):
        dirs.sort()
        print('root', root)

        if root==src_dir:
            # Only from the top, remove subdirs starting with skip prefix
            dirs[:] = [d for d in dirs if not
                       (d.startswith(skip_prefix) or d in skip_trees )]
            print('top-level dirs:', dirs)
            #continue

        files = filter(keep_filename, files)
        print('  dirs:', dirs)
        print('   files:', files)
        # Now, create the list of subdirs and files in the output
        for subdir in dirs:
            new_dir = pjoin(out_dir, root, subdir)
            if not os.path.isdir(new_dir):
                print("Making dir:",new_dir)
                os.mkdir(new_dir)

        if root == src_dir:
            # Only copy files for subdirs, not for the top-level (so we don't
            # copy makefiles and stuff like that)
            copy_files(root, set(top_files) & set(files))

        copy_files(root, files)

#-----------------------------------------------------------------------------
# Execute as a script
#-----------------------------------------------------------------------------
if __name__ == '__main__':
    main()