bpo-32159: Remove tools for CVS and Subversion (#4615)

CPython migrated from CVS to Subversion, to Mercurial, and then to
Git. CVS and Subversion are not more used to develop CPython.

* platform module: drop support for sys.subversion. The
  sys.subversion attribute has been removed in Python 3.3.
* Remove Misc/svnmap.txt
* Remove Tools/scripts/svneol.py
* Remove Tools/scripts/treesync.py

Lib/platform.py

@@ -1202,9 +1202,6 @@ def _sys_version(sys_version=None):
         _, branch, revision = sys._git
     elif hasattr(sys, '_mercurial'):
         _, branch, revision = sys._mercurial
-    elif hasattr(sys, 'subversion'):
-        # sys.subversion was added in Python 2.5
-        _, branch, revision = sys.subversion
     else:
         branch = ''
         revision = ''
@@ -1259,7 +1256,7 @@ def python_branch():
     """ Returns a string identifying the Python implementation
         branch.
 
-        For CPython this is the Subversion branch from which the
+        For CPython this is the SCM branch from which the
         Python binary was built.
 
         If not available, an empty string is returned.
@@ -1273,7 +1270,7 @@ def python_revision():
     """ Returns a string identifying the Python implementation
         revision.
 
-        For CPython this is the Subversion revision from which the
+        For CPython this is the SCM revision from which the
         Python binary was built.
 
         If not available, an empty string is returned.

Lib/test/test_platform.py

@@ -145,14 +145,14 @@ class PlatformTest(unittest.TestCase):
                 ("PyPy", "2.5.2", "trunk", "63378", ('63378', 'Mar 26 2009'),
                  "")
             }
-        for (version_tag, subversion, sys_platform), info in \
+        for (version_tag, scm, sys_platform), info in \
                 sys_versions.items():
             sys.version = version_tag
-            if subversion is None:
+            if scm is None:
                 if hasattr(sys, "_git"):
                     del sys._git
             else:
-                sys._git = subversion
+                sys._git = scm
             if sys_platform is not None:
                 sys.platform = sys_platform
             self.assertEqual(platform.python_implementation(), info[0])

Misc/NEWS.d/next/Tools-Demos/2017-11-28-21-24-41.bpo-32159.RSl4QK.rst

+Remove CVS and Subversion tools: remove svneol.py and treesync.py scripts.
+CPython migrated from CVS to Subversion, to Mercurial, and then to Git. CVS
+and Subversion are no longer used to develop CPython.

Misc/README

@@ -22,6 +22,5 @@ README.AIX              Information about using Python on AIX
 README.coverity         Information about running Coverity's Prevent on Python
 README.valgrind         Information for Valgrind users, see valgrind-python.supp
 SpecialBuilds.txt       Describes extra symbols you can set for debug builds
-svnmap.txt              Map of old SVN revs and branches to hg changeset ids
 valgrind-python.supp    Valgrind suppression file, see README.valgrind
 vgrindefs               Python configuration for vgrind (a generic pretty printer)

Tools/scripts/README

@@ -61,9 +61,7 @@ rgrep.py                  Reverse grep through a file (useful for big logfiles)
 run_tests.py              Run the test suite with more sensible default options
 serve.py                  Small wsgiref-based web server, used in make serve in Doc
 suff.py                   Sort a list of files by suffix
-svneol.py                 Set svn:eol-style on all files in directory
 texi2html.py              Convert GNU texinfo files into HTML
-treesync.py               Synchronize source trees (very idiosyncratic)
 untabify.py               Replace tabs with spaces in argument files
 which.py                  Find a program in $PATH
 win_add2path.py           Add Python to the search path on Windows

Tools/scripts/svneol.py

-#! /usr/bin/env python3
-
-r"""
-SVN helper script.
-
-Try to set the svn:eol-style property to "native" on every .py, .txt, .c and
-.h file in the directory tree rooted at the current directory.
-
-Files with the svn:eol-style property already set (to anything) are skipped.
-
-svn will itself refuse to set this property on a file that's not under SVN
-control, or that has a binary mime-type property set.  This script inherits
-that behavior, and passes on whatever warning message the failing "svn
-propset" command produces.
-
-In the Python project, it's safe to invoke this script from the root of
-a checkout.
-
-No output is produced for files that are ignored.  For a file that gets
-svn:eol-style set, output looks like:
-
-    property 'svn:eol-style' set on 'Lib\ctypes\__init__.py'
-
-For a file not under version control:
-
-    svn: warning: 'patch-finalizer.txt' is not under version control
-
-and for a file with a binary mime-type property:
-
-    svn: File 'Lib\test\test_pep263.py' has binary mime type property
-"""
-
-import re
-import os
-import sys
-import subprocess
-
-
-def propfiles(root, fn):
-    default = os.path.join(root, ".svn", "props", fn + ".svn-work")
-    try:
-        format = int(open(os.path.join(root, ".svn", "format")).read().strip())
-    except IOError:
-        return []
-    if format in (8, 9):
-        # In version 8 and 9, committed props are stored in prop-base, local
-        # modifications in props
-        return [os.path.join(root, ".svn", "prop-base", fn + ".svn-base"),
-                os.path.join(root, ".svn", "props", fn + ".svn-work")]
-    raise ValueError("Unknown repository format")
-
-
-def proplist(root, fn):
-    """Return a list of property names for file fn in directory root."""
-    result = []
-    for path in propfiles(root, fn):
-        try:
-            f = open(path)
-        except IOError:
-            # no properties file: not under version control,
-            # or no properties set
-            continue
-        while True:
-            # key-value pairs, of the form
-            # K <length>
-            # <keyname>NL
-            # V length
-            # <value>NL
-            # END
-            line = f.readline()
-            if line.startswith("END"):
-                break
-            assert line.startswith("K ")
-            L = int(line.split()[1])
-            key = f.read(L)
-            result.append(key)
-            f.readline()
-            line = f.readline()
-            assert line.startswith("V ")
-            L = int(line.split()[1])
-            value = f.read(L)
-            f.readline()
-        f.close()
-    return result
-
-
-def set_eol_native(path):
-    cmd = 'svn propset svn:eol-style native "{}"'.format(path)
-    propset = subprocess.Popen(cmd, shell=True)
-    propset.wait()
-
-
-possible_text_file = re.compile(r"\.([hc]|py|txt|sln|vcproj)$").search
-
-
-def main():
-    for arg in sys.argv[1:] or [os.curdir]:
-        if os.path.isfile(arg):
-            root, fn = os.path.split(arg)
-            if 'svn:eol-style' not in proplist(root, fn):
-                set_eol_native(arg)
-        elif os.path.isdir(arg):
-            for root, dirs, files in os.walk(arg):
-                if '.svn' in dirs:
-                    dirs.remove('.svn')
-                for fn in files:
-                    if possible_text_file(fn):
-                        if 'svn:eol-style' not in proplist(root, fn):
-                            path = os.path.join(root, fn)
-                            set_eol_native(path)
-
-
-if __name__ == '__main__':
-    main()

Tools/scripts/treesync.py

-#! /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()