Imported bm-2.1 from2.1

svn+ssh://svn.mandriva.com/svn/packages/cooker/bm/current/SOURCES/bm-2.1.tar.bz2
at r24959.

1 files changed, 187 insertions, 0 deletions

diff --git a/BuildManager/fileutil.py b/BuildManager/fileutil.py
new file mode 100644
index 0000000..93dd09d
--- /dev/null
+++ b/BuildManager/fileutil.py
@@ -0,0 +1,187 @@
+# This module was originally part of distutils.
+from BuildManager import *
+import os
+
+__all__ = ["copy_file", "move_file"]
+
+# for generating verbose output in 'copy_file()'
+_copy_action = { None:   'copying',
+                 'hard': 'hard linking',
+                 'sym':  'symbolically linking' }
+
+
+def _copy_file_contents (src, dst, buffer_size=16*1024):
+    """Copy the file 'src' to 'dst'; both must be filenames.  Any error
+    opening either file, reading from 'src', or writing to 'dst', raises
+    BuildManagerFileError.  Data is read/written in chunks of 'buffer_size'
+    bytes (default 16k).  No attempt is made to handle anything apart from
+    regular files.
+    """
+    # Stolen from shutil module in the standard library, but with
+    # custom error-handling added.
+
+    fsrc = None
+    fdst = None
+    try:
+        try:
+            fsrc = open(src, 'rb')
+        except os.error, (errno, errstr):
+            raise Error, "could not open %s: %s" % (src, errstr)
+        
+        try:
+            fdst = open(dst, 'wb')
+        except os.error, (errno, errstr):
+            raise Error, "could not create %s: %s" % (dst, errstr)
+        
+        while 1:
+            try:
+                buf = fsrc.read(buffer_size)
+            except os.error, (errno, errstr):
+                raise Error, "could not read from %s: %s" % (src, errstr)
+            
+            if not buf:
+                break
+
+            try:
+                fdst.write(buf)
+            except os.error, (errno, errstr):
+                raise Error, "could not write to %s: %s" % (dst, errstr)
+            
+    finally:
+        if fdst:
+            fdst.close()
+        if fsrc:
+            fsrc.close()
+
+def copy_file (src, dst, preserve_mode=1, preserve_times=1, link=None,
+               dryrun=False):
+
+    """Copy a file 'src' to 'dst'.  If 'dst' is a directory, then 'src' is
+    copied there with the same name; otherwise, it must be a filename.  (If
+    the file exists, it will be ruthlessly clobbered.)  If 'preserve_mode'
+    is true (the default), the file's mode (type and permission bits, or
+    whatever is analogous on the current platform) is copied.  If
+    'preserve_times' is true (the default), the last-modified and
+    last-access times are copied as well. 
+
+    'link' allows you to make hard links (os.link) or symbolic links
+    (os.symlink) instead of copying: set it to "hard" or "sym"; if it is
+    None (the default), files are copied.  Don't set 'link' on systems that
+    don't support it: 'copy_file()' doesn't check if hard or symbolic
+    linking is available.
+
+    Under Mac OS, uses the native file copy function in macostools; on
+    other systems, uses '_copy_file_contents()' to copy file contents.
+
+    Return a tuple (dest_name, copied): 'dest_name' is the actual name of
+    the output file, and 'copied' is true if the file was copied (or would
+    have been copied, if 'dryrun' true).
+    """
+    from stat import ST_ATIME, ST_MTIME, ST_MODE, S_IMODE
+
+    if not os.path.isfile(src):
+        raise Error, "can't copy '%s': " \
+                     "doesn't exist or not a regular file" % src
+
+    if os.path.isdir(dst):
+        dir = dst
+        dst = os.path.join(dst, os.path.basename(src))
+    else:
+        dir = os.path.dirname(dst)
+
+    try:
+        action = _copy_action[link]
+    except KeyError:
+        raise ValueError, "invalid value '%s' for 'link' argument" % link
+    if os.path.basename(dst) == os.path.basename(src):
+        logger.info("%s %s to %s" % (action, src, dir))
+    else:
+        logger.info("%s %s to %s" % (action, src, dst))
+            
+    if dryrun:
+        return (dst, 1)
+
+    # If linking (hard or symbolic), use the appropriate system call
+    # (Unix only, of course, but that's the caller's responsibility)
+    if link == 'hard':
+        if not (os.path.exists(dst) and os.path.samefile(src, dst)):
+            os.link(src, dst)
+    elif link == 'sym':
+        if not (os.path.exists(dst) and os.path.samefile(src, dst)):
+            os.symlink(src, dst)
+
+    # Otherwise (not linking), copy the file contents and
+    # (optionally) copy the times and mode.
+    else:
+        _copy_file_contents(src, dst)
+        if preserve_mode or preserve_times:
+            st = os.stat(src)
+            if preserve_times:
+                os.utime(dst, (st[ST_ATIME], st[ST_MTIME]))
+            if preserve_mode:
+                os.chmod(dst, S_IMODE(st[ST_MODE]))
+
+    return (dst, 1)
+
+def move_file (src, dst, dryrun=False):
+
+    """Move a file 'src' to 'dst'.  If 'dst' is a directory, the file will
+    be moved into it with the same name; otherwise, 'src' is just renamed
+    to 'dst'.  Return the new full name of the file.
+
+    Handles cross-device moves on Unix using 'copy_file()'.  What about
+    other systems???
+    """
+    from os.path import exists, isfile, isdir, basename, dirname
+    import errno
+    
+    logger.info("moving %s to %s" % (src, dst))
+
+    if dryrun:
+        return dst
+
+    if not isfile(src):
+        raise Error, "can't move %s: not a regular file" % src
+
+    if isdir(dst):
+        dst = os.path.join(dst, basename(src))
+    elif exists(dst):
+        raise Error, "can't move %s: destination %s already exists" % \
+                     (src, dst)
+
+    if not isdir(dirname(dst)):
+        raise Error, "can't move %s: destination %s not a valid path" % \
+                     (src, dst)
+
+    copy_it = 0
+    try:
+        os.rename(src, dst)
+    except os.error, (num, msg):
+        if num == errno.EXDEV:
+            copy_it = 1
+        else:
+            raise Error, "couldn't move %s to %s: %s" % (src, dst, msg)
+
+    if copy_it:
+        copy_file(src, dst)
+        try:
+            os.unlink(src)
+        except os.error, (num, msg):
+            try:
+                os.unlink(dst)
+            except os.error:
+                pass
+            raise Error, "couldn't move %s to %s by copy/delete: " \
+                         "delete %s failed: %s" % (src, dst, src, msg)
+
+    return dst
+
+def write_file (filename, contents):
+    """Create a file with the specified name and write 'contents' (a
+    sequence of strings without line terminators) to it.
+    """
+    f = open(filename, "w")
+    for line in contents:
+        f.write(line + "\n")
+    f.close()
+