python-3.6.zip added from Github

README.cosmo contains the necessary links.

third_party/python/Tools/scripts/treesync.py

@@ -0,0 +1,210 @@
+#! /usr/bin/env python3
+
+"""Script to synchronize two source trees.
+
+Invoke with two arguments:
+
+python treesync.py slave master
+
+The assumption is that "master" contains CVS administration while
+slave doesn't.  All files in the slave tree that have a CVS/Entries
+entry in the master tree are synchronized.  This means:
+
+    If the files differ:
+        if the slave file is newer:
+            normalize the slave file
+            if the files still differ:
+                copy the slave to the master
+        else (the master is newer):
+            copy the master to the slave
+
+    normalizing the slave means replacing CRLF with LF when the master
+    doesn't use CRLF
+
+"""
+
+import os, sys, stat, getopt
+
+# Interactivity options
+default_answer = "ask"
+create_files = "yes"
+create_directories = "no"
+write_slave = "ask"
+write_master = "ask"
+
+def main():
+    global default_answer, always_no, always_yes, create_files
+    global create_directories, write_master, write_slave
+    opts, args = getopt.getopt(sys.argv[1:], "nym:s:d:f:a:")
+    for o, a in opts:
+        if o == '-y':
+            default_answer = "yes"
+        if o == '-n':
+            default_answer = "no"
+        if o == '-s':
+            write_slave = a
+        if o == '-m':
+            write_master = a
+        if o == '-d':
+            create_directories = a
+        if o == '-f':
+            create_files = a
+        if o == '-a':
+            create_files = create_directories = write_slave = write_master = a
+    try:
+        [slave, master] = args
+    except ValueError:
+        print("usage: python", sys.argv[0] or "treesync.py", end=' ')
+        print("[-n] [-y] [-m y|n|a] [-s y|n|a] [-d y|n|a] [-f n|y|a]", end=' ')
+        print("slavedir masterdir")
+        return
+    process(slave, master)
+
+def process(slave, master):
+    cvsdir = os.path.join(master, "CVS")
+    if not os.path.isdir(cvsdir):
+        print("skipping master subdirectory", master)
+        print("-- not under CVS")
+        return
+    print("-"*40)
+    print("slave ", slave)
+    print("master", master)
+    if not os.path.isdir(slave):
+        if not okay("create slave directory %s?" % slave,
+                    answer=create_directories):
+            print("skipping master subdirectory", master)
+            print("-- no corresponding slave", slave)
+            return
+        print("creating slave directory", slave)
+        try:
+            os.mkdir(slave)
+        except OSError as msg:
+            print("can't make slave directory", slave, ":", msg)
+            return
+        else:
+            print("made slave directory", slave)
+    cvsdir = None
+    subdirs = []
+    names = os.listdir(master)
+    for name in names:
+        mastername = os.path.join(master, name)
+        slavename = os.path.join(slave, name)
+        if name == "CVS":
+            cvsdir = mastername
+        else:
+            if os.path.isdir(mastername) and not os.path.islink(mastername):
+                subdirs.append((slavename, mastername))
+    if cvsdir:
+        entries = os.path.join(cvsdir, "Entries")
+        for e in open(entries).readlines():
+            words = e.split('/')
+            if words[0] == '' and words[1:]:
+                name = words[1]
+                s = os.path.join(slave, name)
+                m = os.path.join(master, name)
+                compare(s, m)
+    for (s, m) in subdirs:
+        process(s, m)
+
+def compare(slave, master):
+    try:
+        sf = open(slave, 'r')
+    except IOError:
+        sf = None
+    try:
+        mf = open(master, 'rb')
+    except IOError:
+        mf = None
+    if not sf:
+        if not mf:
+            print("Neither master nor slave exists", master)
+            return
+        print("Creating missing slave", slave)
+        copy(master, slave, answer=create_files)
+        return
+    if not mf:
+        print("Not updating missing master", master)
+        return
+    if sf and mf:
+        if identical(sf, mf):
+            return
+    sft = mtime(sf)
+    mft = mtime(mf)
+    if mft > sft:
+        # Master is newer -- copy master to slave
+        sf.close()
+        mf.close()
+        print("Master             ", master)
+        print("is newer than slave", slave)
+        copy(master, slave, answer=write_slave)
+        return
+    # Slave is newer -- copy slave to master
+    print("Slave is", sft-mft, "seconds newer than master")
+    # But first check what to do about CRLF
+    mf.seek(0)
+    fun = funnychars(mf)
+    mf.close()
+    sf.close()
+    if fun:
+        print("***UPDATING MASTER (BINARY COPY)***")
+        copy(slave, master, "rb", answer=write_master)
+    else:
+        print("***UPDATING MASTER***")
+        copy(slave, master, "r", answer=write_master)
+
+BUFSIZE = 16*1024
+
+def identical(sf, mf):
+    while 1:
+        sd = sf.read(BUFSIZE)
+        md = mf.read(BUFSIZE)
+        if sd != md: return 0
+        if not sd: break
+    return 1
+
+def mtime(f):
+    st = os.fstat(f.fileno())
+    return st[stat.ST_MTIME]
+
+def funnychars(f):
+    while 1:
+        buf = f.read(BUFSIZE)
+        if not buf: break
+        if '\r' in buf or '\0' in buf: return 1
+    return 0
+
+def copy(src, dst, rmode="rb", wmode="wb", answer='ask'):
+    print("copying", src)
+    print("     to", dst)
+    if not okay("okay to copy? ", answer):
+        return
+    f = open(src, rmode)
+    g = open(dst, wmode)
+    while 1:
+        buf = f.read(BUFSIZE)
+        if not buf: break
+        g.write(buf)
+    f.close()
+    g.close()
+
+def raw_input(prompt):
+    sys.stdout.write(prompt)
+    sys.stdout.flush()
+    return sys.stdin.readline()
+
+def okay(prompt, answer='ask'):
+    answer = answer.strip().lower()
+    if not answer or answer[0] not in 'ny':
+        answer = input(prompt)
+        answer = answer.strip().lower()
+        if not answer:
+            answer = default_answer
+    if answer[:1] == 'y':
+        return 1
+    if answer[:1] == 'n':
+        return 0
+    print("Yes or No please -- try again:")
+    return okay(prompt)
+
+if __name__ == '__main__':
+    main()