#! /usr/bin/env python
"""
This script walks over the files and subdirs of the specified directories
('.' by default), and changes the svn properties to match the PyPy guidelines:

 svn:ignore      includes '*.pyc' and '*.pyo' for all directories
 svn:eol-style   is 'native' for *.py and *.txt files

"""

import sys, os
import autopath 
import py 

forbidden = range(0,32)
forbidden.remove(9)    # tab
forbidden.remove(10)   # lf
forbidden.remove(12)   # ff, ^L
forbidden.remove(13)   # cr


def looksbinary(data, forbidden = [chr(i) for i in forbidden]):
    "Check if some data chunk appears to be binary."
    for c in forbidden:
        if c in data:
            return True
    return False

def can_set_eol_style(path):
    "check to see if we could set eol-style on the path." 
    data = path.read(mode='rb') 
    if looksbinary(data): 
        print "%s looks like a binary, ignoring" % path 
        return False 
    original = data
    data = data.replace('\r\n', '\n')
    data = data.replace('\r',   '\n')
    data = data.replace('\n', os.linesep)
    if data != original:
        print "*"*30 
        print "--->  %s  <---" % path 
        print ("WARNING: the file content was modified "
               "by fixing the EOL style.")
        print "*"*30 
        #return False
        path.write(data, mode='wb')
        return True
    return True

def checkeolfile(path):     
    return path.ext in ('.txt', '.py', '.asc', '.h', '.c')

def fixdirectory(path): 
    print "+ checking directory", path, 
    fns = path.listdir(checkeolfile) 
    if fns: 
        ignores = path.propget('svn:ignore') 
        newignores = ignores 
        l = ignores.split('\n')
        for x in ('*.pyc', '*.pyo'): 
            if x not in l: 
                l.append(x) 
        newignores = "\n".join(l) 
        print ", setting ignores", newignores  
        path.propset('svn:ignore', newignores) 
    else: 
        print  
    for fn in fns: 
        fixfile(fn) 

    for x in path.listdir(lambda x: x.check(dir=1, versioned=True)): 
        if x.check(link=1):
            continue
        fixdirectory(x) 

def fixfile(path): 
    x = path.localpath.relto(py.path.local())
    if not x: 
        x = path.localpath 
    print "checking", x, 
    if path.check(versioned=0): 
        return False 
    oldprop = path.propget('svn:eol-style')
    if oldprop: 
        print "eol-style already set (%r)" %(oldprop, )
    else:   
        if can_set_eol_style(path): 
            print "setting eol-style native" 
            path.propset('svn:eol-style', 'native') 
        else: 
            print "cannot set eol-style"
    
if __name__ == '__main__':
    if len(sys.argv) > 1:
        for fname in sys.argv[1:]:
            paths = [py.path.svnwc(x) for x in sys.argv[1:]]
    else:
        paths = [py.path.svnwc()]

    for path in paths: 
        if path.check(link=1):
            print 'ignoring link', path
        elif path.check(dir=1): 
            fixdirectory(path) 
        elif path.check(file=1):
            fixfile(path) 
        else: 
            print "ignoring", path