#!/usr/bin/env python
"""
hackit - modify an installed NE1 application on Mac to use ALTERNATE_CAD_SRC_PATH

@author: Bruce
@version: $Id$
"""

import sys, os, time

if len(sys.argv) != 3:
    print """usage: hackit </path/to/ne1/folder> $W
 (for example, hackit /Applications/Nanorex/NanoEngineer-1_1.1.1 /Nanorex/trunk/cad/src)
 will install ALTERNATE_CAD_SRC_PATH pointing to $W inside
 the .app in </path/to/ne1/folder> (even if the .app has been renamed),
 and also do some or all of the extra hacks documented on
 the wiki page about that feature, namely:
 http://www.nanoengineer-1.net/mediawiki/index.php?title=Using_the_Libraries_from_an_NE1_Installation_for_Mac_Development
"""
    sys.exit(1)
    

progname, ne1_folder, alt_src_dir = sys.argv

def fix_dir(dirpath):
    fixed = os.path.normpath(os.path.expanduser(dirpath))
    if not os.path.isdir(fixed):
        print "error: can't find directory [%s]" % fixed
        if fixed != dirpath:
            print " (expanded from [%s])" % dirpath
        sys.exit(1)
    return fixed

ne1_folder = fix_dir(ne1_folder)
alt_src_dir = fix_dir(alt_src_dir)

def find_app_in_dir(dirpath):
    res = []
    for filename in os.listdir( dirpath):
        if filename.endswith('.app'):
            res.append(filename)
    assert len(res) == 1, "not exactly one .app in [%s]" % dirpath
    return os.path.join( dirpath, res[0] )
        
ne1_app_folder = find_app_in_dir(ne1_folder)

Contents_Resources = os.path.join( ne1_app_folder, "Contents", "Resources")

os.chdir( Contents_Resources )

# warn if this may have been done before, and stop

stop = False
for filename in ( "main-ORIG.py", "ALTERNATE_CAD_SRC_PATH"):
    if os.path.exists(filename):
        print "already have file [%s]" % filename
        stop = True
if stop:
    print "so stopping, since we probably did this before."
    print "to redo, remove those files from [%s]." % Contents_Resources
    sys.exit(1)
    
# create ALTERNATE_CAD_SRC_PATH file

altfile = file("ALTERNATE_CAD_SRC_PATH", "wb")
altfile.write("%s\n" % alt_src_dir)
altfile.close()

print "created (or rewrote) %r containing %r" % (
    Contents_Resources + "/" + "ALTERNATE_CAD_SRC_PATH",
    alt_src_dir
    )

### todo: verify it has correct contents

# make main.py a symlink

os.system("mv main.py main-ORIG.py")
os.system("ln -s %s/main.py main.py" % alt_src_dir)

print "made main.py a symlink"

### todo: verify it exists and points to correct place, and works

# done

print
print """NOT YET SPECIFICALLY HANDLED HERE:
partlib
cad/src/ui
sim.so
cad/plugins
samevals.so
atombase.so
"""

print
print "done"

sys.exit(0)