#! /usr/bin/env python

# xxci

#

# check in files for which rcsdiff returns nonzero exit status

import sys

import os

from stat import *

import fnmatch

EXECMAGIC = '\001\140\000\010'

MAXSIZE = 200*1024 # Files this big must be binaries and are skipped.

def getargs():

    args = sys.argv[1:]

    if args:

        return args

    print 'No arguments, checking almost *, in "ls -t" order'

    list = []

    for file in os.listdir(os.curdir):

        if not skipfile(file):

            list.append((getmtime(file), file))

    list.sort()

    if not list:

        print 'Nothing to do -- exit 1'

        sys.exit(1)

    list.sort()

    list.reverse()

    for mtime, file in list: args.append(file)

    return args

def getmtime(file):

    try:

        st = os.stat(file)

        return st[ST_MTIME]

    except os.error:

        return -1

badnames = ['tags', 'TAGS', 'xyzzy', 'nohup.out', 'core']

badprefixes = ['.', ',', '@', '#', 'o.']

badsuffixes = \

        ['~', '.a', '.o', '.old', '.bak', '.orig', '.new', '.prev', '.not', \

         '.pyc', '.fdc', '.rgb', '.elc', ',v']

ignore = []

def setup():

    ignore[:] = badnames

    for p in badprefixes:

        ignore.append(p + '*')

    for p in badsuffixes:

        ignore.append('*' + p)

    try:

        f = open('.xxcign', 'r')

    except IOError:

        return

    ignore[:] = ignore + f.read().split()

def skipfile(file):

    for p in ignore:

        if fnmatch.fnmatch(file, p): return 1

    try:

        st = os.lstat(file)

    except os.error:

        return 1 # Doesn't exist -- skip it

    # Skip non-plain files.

    if not S_ISREG(st[ST_MODE]): return 1

    # Skip huge files -- probably binaries.

    if st[ST_SIZE] >= MAXSIZE: return 1

    # Skip executables

    try:

        data = open(file, 'r').read(len(EXECMAGIC))

        if data == EXECMAGIC: return 1

    except:

        pass

    return 0

def badprefix(file):

    for bad in badprefixes:

        if file[:len(bad)] == bad: return 1

    return 0

def badsuffix(file):

    for bad in badsuffixes:

        if file[-len(bad):] == bad: return 1

    return 0

def go(args):

    for file in args:

        print file + ':'

        if differing(file):

            showdiffs(file)

            if askyesno('Check in ' + file + ' ? '):

                sts = os.system('rcs -l ' + file) # ignored

                sts = os.system('ci -l ' + file)

def differing(file):

    cmd = 'co -p ' + file + ' 2>/dev/null | cmp -s - ' + file

    sts = os.system(cmd)

    return sts != 0

def showdiffs(file):

    cmd = 'rcsdiff ' + file + ' 2>&1 | ${PAGER-more}'

    sts = os.system(cmd)

def askyesno(prompt):

    s = raw_input(prompt)

    return s in ['y', 'yes']

if __name__ == '__main__':

    try:

        setup()

        go(getargs())

    except KeyboardInterrupt:

        print '[Intr]'