add hg and python

sys/lib/python/shutil.py

@@ -0,0 +1,203 @@
+"""Utility functions for copying files and directory trees.
+
+XXX The functions here don't copy the resource fork or other metadata on Mac.
+
+"""
+
+import os
+import sys
+import stat
+from os.path import abspath
+
+__all__ = ["copyfileobj","copyfile","copymode","copystat","copy","copy2",
+           "copytree","move","rmtree","Error"]
+
+class Error(EnvironmentError):
+    pass
+
+def copyfileobj(fsrc, fdst, length=16*1024):
+    """copy data from file-like object fsrc to file-like object fdst"""
+    while 1:
+        buf = fsrc.read(length)
+        if not buf:
+            break
+        fdst.write(buf)
+
+def _samefile(src, dst):
+    # Macintosh, Unix.
+    if hasattr(os.path,'samefile'):
+        try:
+            return os.path.samefile(src, dst)
+        except OSError:
+            return False
+
+    # All other platforms: check for same pathname.
+    return (os.path.normcase(os.path.abspath(src)) ==
+            os.path.normcase(os.path.abspath(dst)))
+
+def copyfile(src, dst):
+    """Copy data from src to dst"""
+    if _samefile(src, dst):
+        raise Error, "`%s` and `%s` are the same file" % (src, dst)
+
+    fsrc = None
+    fdst = None
+    try:
+        fsrc = open(src, 'rb')
+        fdst = open(dst, 'wb')
+        copyfileobj(fsrc, fdst)
+    finally:
+        if fdst:
+            fdst.close()
+        if fsrc:
+            fsrc.close()
+
+def copymode(src, dst):
+    """Copy mode bits from src to dst"""
+    if hasattr(os, 'chmod'):
+        st = os.stat(src)
+        mode = stat.S_IMODE(st.st_mode)
+        os.chmod(dst, mode)
+
+def copystat(src, dst):
+    """Copy all stat info (mode bits, atime and mtime) from src to dst"""
+    st = os.stat(src)
+    mode = stat.S_IMODE(st.st_mode)
+    if hasattr(os, 'utime'):
+        os.utime(dst, (st.st_atime, st.st_mtime))
+    if hasattr(os, 'chmod'):
+        os.chmod(dst, mode)
+
+
+def copy(src, dst):
+    """Copy data and mode bits ("cp src dst").
+
+    The destination may be a directory.
+
+    """
+    if os.path.isdir(dst):
+        dst = os.path.join(dst, os.path.basename(src))
+    copyfile(src, dst)
+    copymode(src, dst)
+
+def copy2(src, dst):
+    """Copy data and all stat info ("cp -p src dst").
+
+    The destination may be a directory.
+
+    """
+    if os.path.isdir(dst):
+        dst = os.path.join(dst, os.path.basename(src))
+    copyfile(src, dst)
+    copystat(src, dst)
+
+
+def copytree(src, dst, symlinks=False):
+    """Recursively copy a directory tree using copy2().
+
+    The destination directory must not already exist.
+    If exception(s) occur, an Error is raised with a list of reasons.
+
+    If the optional symlinks flag is true, symbolic links in the
+    source tree result in symbolic links in the destination tree; if
+    it is false, the contents of the files pointed to by symbolic
+    links are copied.
+
+    XXX Consider this example code rather than the ultimate tool.
+
+    """
+    names = os.listdir(src)
+    os.makedirs(dst)
+    errors = []
+    for name in names:
+        srcname = os.path.join(src, name)
+        dstname = os.path.join(dst, name)
+        try:
+            if symlinks and os.path.islink(srcname):
+                linkto = os.readlink(srcname)
+                os.symlink(linkto, dstname)
+            elif os.path.isdir(srcname):
+                copytree(srcname, dstname, symlinks)
+            else:
+                copy2(srcname, dstname)
+            # XXX What about devices, sockets etc.?
+        except (IOError, os.error), why:
+            errors.append((srcname, dstname, str(why)))
+        # catch the Error from the recursive copytree so that we can
+        # continue with other files
+        except Error, err:
+            errors.extend(err.args[0])
+    try:
+        copystat(src, dst)
+    except WindowsError:
+        # can't copy file access times on Windows
+        pass
+    except OSError, why:
+        errors.extend((src, dst, str(why)))
+    if errors:
+        raise Error, errors
+
+def rmtree(path, ignore_errors=False, onerror=None):
+    """Recursively delete a directory tree.
+
+    If ignore_errors is set, errors are ignored; otherwise, if onerror
+    is set, it is called to handle the error with arguments (func,
+    path, exc_info) where func is os.listdir, os.remove, or os.rmdir;
+    path is the argument to that function that caused it to fail; and
+    exc_info is a tuple returned by sys.exc_info().  If ignore_errors
+    is false and onerror is None, an exception is raised.
+
+    """
+    if ignore_errors:
+        def onerror(*args):
+            pass
+    elif onerror is None:
+        def onerror(*args):
+            raise
+    names = []
+    try:
+        names = os.listdir(path)
+    except os.error, err:
+        onerror(os.listdir, path, sys.exc_info())
+    for name in names:
+        fullname = os.path.join(path, name)
+        try:
+            mode = os.lstat(fullname).st_mode
+        except os.error:
+            mode = 0
+        if stat.S_ISDIR(mode):
+            rmtree(fullname, ignore_errors, onerror)
+        else:
+            try:
+                os.remove(fullname)
+            except os.error, err:
+                onerror(os.remove, fullname, sys.exc_info())
+    try:
+        os.rmdir(path)
+    except os.error:
+        onerror(os.rmdir, path, sys.exc_info())
+
+def move(src, dst):
+    """Recursively move a file or directory to another location.
+
+    If the destination is on our current filesystem, then simply use
+    rename.  Otherwise, copy src to the dst and then remove src.
+    A lot more could be done here...  A look at a mv.c shows a lot of
+    the issues this implementation glosses over.
+
+    """
+
+    try:
+        os.rename(src, dst)
+    except OSError:
+        if os.path.isdir(src):
+            if destinsrc(src, dst):
+                raise Error, "Cannot move a directory '%s' into itself '%s'." % (src, dst)
+            copytree(src, dst, symlinks=True)
+            rmtree(src)
+        else:
+            copy2(src,dst)
+            os.unlink(src)
+
+def destinsrc(src, dst):
+    return abspath(dst).startswith(abspath(src))