Semi-automatically importing directories with callthru: the gis.py script

From Cellbe

Importing files with callthru can be boring, especially when the files to import are many. This python script (gis.py) makes it easy to transfer files using the callthru facility provided with the simulator: Let's say you have a directory source which contains the file you want to transfer from the host to the guest, and you want its contents being placed in a directory named destination. Using the gis.py script you can do that as follows:

host /path/to/pwd/$ gis.py source/directory/path destination/relative/path/ > generated_import_script.sh

simulator /some/path/$ callthru source /path/to/pwd/generated_import_script.sh > gis.sh
simulator /some/path/$ chmod a+x gis.sh
simulator /some/path/$ ./gis.sh

Here's the script:

#!/usr/bin/python

#
#      Author: Alessandro Piras (laynor@gmail.com)
# Description: generates a script that copies the contents of a directory 
#              in the host environment to a directory in the simulated 
#              environment.
#
import os, sys
from stat import *

# function that walks the directory tree
def walktree(top, fcallback, dcallback,  dest_dir):
	'''recursively descend the directory tree rooted at top,
	calling the callback function for each regular file'''

	if dest_dir != '':
		pmkdir(dest_dir)
	##
	## The function is called on a file, executing the callback
	##
	mode = os.stat(top)[ST_MODE]
	if S_ISREG(mode):
		# It's a file, call the callback function
		fcallback(top, '',  mode, dest_dir)
		return 0

	##
	## Walking the tree...
	##
	for f in os.listdir(top):
		pathname = os.path.join(top, f)
		mode = os.stat(pathname)[ST_MODE]
		if S_ISDIR(mode):
			# It's a directory, recurse into it
			print ""
			walktree(pathname, fcallback, dcallback,  dest_dir + f + '/')
		elif S_ISREG(mode):
			# It's a file, call the callback function
			fcallback(f, top, mode, dest_dir)
		else:
			# Unknown file type, print a message
			print 'Skipping %s' % pathname

#function called when walking on a file (callthru)
def pcallthru(file, base_dir, mode, dest_dir):
	#command='cat'
	command='callthru source'
	command = command + ' '
	if base_dir == '':
		base_dir = os.path.dirname(file)
		file = os.path.basename(file)
	print ""
	print command + base_dir +'/'+ file + ' > ' +  dest_dir + file 
	x = '%o' %mode
	x = '0'+x[-3:]
	print 'chmod '+x+' ' + dest_dir + file

#function called when walkin on a dir: 
def pmkdir(dir):
	print 'mkdir -p %s' %dir

def main(argv):
	## program arguments handling
	dest_dir = ''
	if len(argv) < 2:
		print "USAGE: %s /host/dir/ [/simulator/dir]" % argv[0]
		return 0

	if len(argv) > 2:
		dest_dir=argv[2]
		if dest_dir[-1] != '/':
			dest_dir = dest_dir + '/'

	if not os.path.exists(argv[1]):
		print "File or directory not found: "+argv[1]
		return 0

	print "#\
# " + argv[0] +""" generated file. Don't edit by hand!!
# It will be replaced by the next """ + argv[0] + " call.\
#\
"

	base_dir = os.path.abspath(argv[1])
	
	if base_dir[-1] == '/':
		base_dir = base_dir[:-1]
	walktree(base_dir, pcallthru, pmkdir, dest_dir)

if __name__ == '__main__':
	main(sys.argv)