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README	4.67 KB	-rw-r--r--	2021-09-04 08:19
abitype.py	5.45 KB	-rwxr-xr-x	2024-04-17 20:49
analyze_dxp.py	4.08 KB	-rw-r--r--	2024-04-17 20:49
byext.py	3.83 KB	-rwxr-xr-x	2024-04-17 20:49
byteyears.py	1.62 KB	-rwxr-xr-x	2024-04-17 20:49
checkpip.py	805 B	-rwxr-xr-x	2024-04-17 20:49
checkpyc.py	2.17 KB	-rwxr-xr-x	2024-04-17 20:49
cleanfuture.py	8.43 KB	-rwxr-xr-x	2024-04-17 20:49
combinerefs.py	4.33 KB	-rwxr-xr-x	2024-04-17 20:49
copytime.py	674 B	-rwxr-xr-x	2024-04-17 20:49
crlf.py	643 B	-rwxr-xr-x	2024-04-17 20:49
db2pickle.py	3.56 KB	-rwxr-xr-x	2024-04-17 20:49
diff.py	2.21 KB	-rwxr-xr-x	2024-04-17 20:49
dutree.doc	2.18 KB	-rw-r--r--	2021-09-04 08:19
dutree.py	1.58 KB	-rwxr-xr-x	2024-04-17 20:49
eptags.py	1.47 KB	-rwxr-xr-x	2024-04-17 20:49
find-uname.py	1.18 KB	-rwxr-xr-x	2024-04-17 20:49
find_recursionlimit.py	3.91 KB	-rwxr-xr-x	2024-04-17 20:49
finddiv.py	2.45 KB	-rwxr-xr-x	2024-04-17 20:49
findlinksto.py	1.06 KB	-rwxr-xr-x	2024-04-17 20:49
findnocoding.py	2.89 KB	-rwxr-xr-x	2024-04-17 20:49
fixcid.py	9.83 KB	-rwxr-xr-x	2024-04-17 20:49
fixdiv.py	13.57 KB	-rwxr-xr-x	2024-04-17 20:49
fixheader.py	1.19 KB	-rwxr-xr-x	2024-04-17 20:49
fixnotice.py	3 KB	-rwxr-xr-x	2024-04-17 20:49
fixps.py	911 B	-rwxr-xr-x	2024-04-17 20:49
generate_opcode_h.py	1.47 KB	-rw-r--r--	2024-04-17 20:49
get-remote-certificate.py	2.66 KB	-rwxr-xr-x	2024-04-17 20:49
google.py	533 B	-rwxr-xr-x	2024-04-17 20:49
gprof2html.py	2.19 KB	-rwxr-xr-x	2024-04-17 20:49
h2py.py	5.48 KB	-rwxr-xr-x	2024-04-17 20:49
highlight.py	8.96 KB	-rwxr-xr-x	2024-04-17 20:49
idle3	96 B	-rwxr-xr-x	2021-09-04 08:19
ifdef.py	3.64 KB	-rwxr-xr-x	2024-04-17 20:49
import_diagnostics.py	1011 B	-rwxr-xr-x	2024-04-17 20:49
lfcr.py	651 B	-rwxr-xr-x	2024-04-17 20:49
linktree.py	2.39 KB	-rwxr-xr-x	2024-04-17 20:49
lll.py	763 B	-rwxr-xr-x	2024-04-17 20:49
mailerdaemon.py	7.86 KB	-rwxr-xr-x	2024-04-17 20:49
make_ctype.py	2.24 KB	-rwxr-xr-x	2024-04-17 20:49
md5sum.py	2.46 KB	-rwxr-xr-x	2024-04-17 20:49
mkreal.py	1.6 KB	-rwxr-xr-x	2024-04-17 20:49
ndiff.py	3.74 KB	-rwxr-xr-x	2024-04-17 20:49
nm2def.py	2.41 KB	-rwxr-xr-x	2024-04-17 20:49
objgraph.py	5.85 KB	-rwxr-xr-x	2024-04-17 20:49
parse_html5_entities.py	3.92 KB	-rwxr-xr-x	2024-04-17 20:49
parseentities.py	1.67 KB	-rwxr-xr-x	2024-04-17 20:49
patchcheck.py	9.63 KB	-rwxr-xr-x	2024-04-17 20:49
pathfix.py	5.1 KB	-rwxr-xr-x	2024-04-17 20:49
pdeps.py	3.83 KB	-rwxr-xr-x	2024-04-17 20:49
pickle2db.py	3.94 KB	-rwxr-xr-x	2024-04-17 20:49
pindent.py	16.74 KB	-rwxr-xr-x	2024-04-17 20:49
ptags.py	1.21 KB	-rwxr-xr-x	2024-04-17 20:49
pydoc3	80 B	-rwxr-xr-x	2021-09-04 08:19
pysource.py	3.79 KB	-rwxr-xr-x	2024-04-17 20:49
pyvenv	437 B	-rwxr-xr-x	2021-09-04 08:19
reindent-rst.py	279 B	-rwxr-xr-x	2024-04-17 20:49
reindent.py	11.38 KB	-rwxr-xr-x	2024-04-17 20:49
rgrep.py	1.45 KB	-rwxr-xr-x	2024-04-17 20:49
run_tests.py	1.87 KB	-rw-r--r--	2024-04-17 20:49
serve.py	1.15 KB	-rwxr-xr-x	2024-04-17 20:49
suff.py	521 B	-rwxr-xr-x	2024-04-17 20:49
svneol.py	3.42 KB	-rwxr-xr-x	2024-04-17 20:49
texi2html.py	68.54 KB	-rwxr-xr-x	2024-04-17 20:49
treesync.py	5.83 KB	-rwxr-xr-x	2024-04-17 20:49
untabify.py	1.28 KB	-rwxr-xr-x	2024-04-17 20:49
update_file.py	762 B	-rw-r--r--	2024-04-17 20:49
which.py	1.61 KB	-rwxr-xr-x	2024-04-17 20:49
win_add2path.py	1.62 KB	-rw-r--r--	2024-04-17 20:49

Rename

#! /opt/alt/python36/bin/python3.6

# Change the #! line occurring in Python scripts.  The new interpreter
# pathname must be given with a -i option.
#
# Command line arguments are files or directories to be processed.
# Directories are searched recursively for files whose name looks
# like a python module.
# Symbolic links are always ignored (except as explicit directory
# arguments).
# The original file is kept as a back-up (with a "~" attached to its name),
# -n flag can be used to disable this.
#
# Undoubtedly you can do this using find and sed or perl, but this is
# a nice example of Python code that recurses down a directory tree
# and uses regular expressions.  Also note several subtleties like
# preserving the file's mode and avoiding to even write a temp file
# when no changes are needed for a file.
#
# NB: by changing only the function fixfile() you can turn this
# into a program for a different change to Python programs...

import sys
import re
import os
from stat import *
import getopt

err = sys.stderr.write
dbg = err
rep = sys.stdout.write

new_interpreter = None
preserve_timestamps = False
create_backup = True

def main():
    global new_interpreter
    global preserve_timestamps
    global create_backup
    usage = ('usage: %s -i /interpreter -p -n file-or-directory ...\n' %
             sys.argv[0])
    try:
        opts, args = getopt.getopt(sys.argv[1:], 'i:pn')
    except getopt.error as msg:
        err(str(msg) + '\n')
        err(usage)
        sys.exit(2)
    for o, a in opts:
        if o == '-i':
            new_interpreter = a.encode()
        if o == '-p':
            preserve_timestamps = True
        if o == '-n':
            create_backup = False
    if not new_interpreter or not new_interpreter.startswith(b'/') or \
           not args:
        err('-i option or file-or-directory missing\n')
        err(usage)
        sys.exit(2)
    bad = 0
    for arg in args:
        if os.path.isdir(arg):
            if recursedown(arg): bad = 1
        elif os.path.islink(arg):
            err(arg + ': will not process symbolic links\n')
            bad = 1
        else:
            if fix(arg): bad = 1
    sys.exit(bad)

ispythonprog = re.compile(r'^[a-zA-Z0-9_]+\.py$')
def ispython(name):
    return bool(ispythonprog.match(name))

def recursedown(dirname):
    dbg('recursedown(%r)\n' % (dirname,))
    bad = 0
    try:
        names = os.listdir(dirname)
    except OSError as msg:
        err('%s: cannot list directory: %r\n' % (dirname, msg))
        return 1
    names.sort()
    subdirs = []
    for name in names:
        if name in (os.curdir, os.pardir): continue
        fullname = os.path.join(dirname, name)
        if os.path.islink(fullname): pass
        elif os.path.isdir(fullname):
            subdirs.append(fullname)
        elif ispython(name):
            if fix(fullname): bad = 1
    for fullname in subdirs:
        if recursedown(fullname): bad = 1
    return bad

def fix(filename):
##  dbg('fix(%r)\n' % (filename,))
    try:
        f = open(filename, 'rb')
    except IOError as msg:
        err('%s: cannot open: %r\n' % (filename, msg))
        return 1
    line = f.readline()
    fixed = fixline(line)
    if line == fixed:
        rep(filename+': no change\n')
        f.close()
        return
    head, tail = os.path.split(filename)
    tempname = os.path.join(head, '@' + tail)
    try:
        g = open(tempname, 'wb')
    except IOError as msg:
        f.close()
        err('%s: cannot create: %r\n' % (tempname, msg))
        return 1
    rep(filename + ': updating\n')
    g.write(fixed)
    BUFSIZE = 8*1024
    while 1:
        buf = f.read(BUFSIZE)
        if not buf: break
        g.write(buf)
    g.close()
    f.close()

# Finishing touch -- move files

mtime = None
    atime = None
    # First copy the file's mode to the temp file
    try:
        statbuf = os.stat(filename)
        mtime = statbuf.st_mtime
        atime = statbuf.st_atime
        os.chmod(tempname, statbuf[ST_MODE] & 0o7777)
    except OSError as msg:
        err('%s: warning: chmod failed (%r)\n' % (tempname, msg))
    # Then make a backup of the original file as filename~
    if create_backup:
        try:
            os.rename(filename, filename + '~')
        except OSError as msg:
            err('%s: warning: backup failed (%r)\n' % (filename, msg))
    else:
        try:
            os.remove(filename)
        except OSError as msg:
            err('%s: warning: removing failed (%r)\n' % (filename, msg))
    # Now move the temp file to the original file
    try:
        os.rename(tempname, filename)
    except OSError as msg:
        err('%s: rename failed (%r)\n' % (filename, msg))
        return 1
    if preserve_timestamps:
        if atime and mtime:
            try:
                os.utime(filename, (atime, mtime))
            except OSError as msg:
                err('%s: reset of timestamp failed (%r)\n' % (filename, msg))
                return 1
    # Return success
    return 0

def fixline(line):
    if not line.startswith(b'#!'):
        return line
    if b"python" not in line:
        return line
    return b'#! ' + new_interpreter + b'\n'

if __name__ == '__main__':
    main()