"""SCons.Tool.zip

Tool-specific initialization for zip.

There normally shouldn't be any need to import this module directly.
It will usually be imported through the generic SCons.Tool.Tool()
selection method.

"""

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__revision__ = "__FILE__ __REVISION__ __DATE__ __DEVELOPER__"

import os.path

import SCons.Builder
import SCons.Defaults
import SCons.Node.FS
import SCons.Util

import zipfile

zipcompression = zipfile.ZIP_DEFLATED
def zip(target, source, env):
    compression = env.get('ZIPCOMPRESSION', 0)
    zf = zipfile.ZipFile(str(target[0]), 'w', compression)
    for s in source:
        if s.isdir():
            for dirpath, dirnames, filenames in os.walk(str(s)):
                for fname in filenames:
                    path = os.path.join(dirpath, fname)
                    if os.path.isfile(path):

                        zf.write(path, os.path.relpath(path, str(env.get('ZIPROOT', ''))))
        else:
            zf.write(str(s), os.path.relpath(str(s), str(env.get('ZIPROOT', ''))))
    zf.close()

zipAction = SCons.Action.Action(zip, varlist=['ZIPCOMPRESSION'])

ZipBuilder = SCons.Builder.Builder(action = SCons.Action.Action('$ZIPCOM', '$ZIPCOMSTR'),
                                   source_factory = SCons.Node.FS.Entry,
                                   source_scanner = SCons.Defaults.DirScanner,
                                   suffix = '$ZIPSUFFIX',
                                   multi = 1)


def generate(env):
    """Add Builders and construction variables for zip to an Environment."""
    try:
        bld = env['BUILDERS']['Zip']
    except KeyError:
        bld = ZipBuilder
        env['BUILDERS']['Zip'] = bld

    env['ZIP']        = 'zip'
    env['ZIPFLAGS']   = SCons.Util.CLVar('')
    env['ZIPCOM']     = zipAction
    env['ZIPCOMPRESSION'] =  zipcompression
    env['ZIPSUFFIX']  = '.zip'
    env['ZIPROOT']    = SCons.Util.CLVar('')

def exists(env):
    return True

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