Rename "morituri" module to "whipper".

Fixes https://github.com/JoeLametta/whipper/issues/100

whipper/program/cdrdao.py

@@ -0,0 +1,82 @@
+import os
+import re
+import tempfile
+from subprocess import Popen, PIPE
+
+from whipper.common.common import EjectError
+from whipper.image.toc import TocFile
+
+import logging
+logger = logging.getLogger(__name__)
+
+CDRDAO = 'cdrdao'
+
+def read_toc(device, fast_toc=False):
+    """
+    Return cdrdao-generated table of contents for 'device'.
+    """
+    # cdrdao MUST be passed a non-existing filename as its last argument
+    # to write the TOC to; it does not support writing to stdout or
+    # overwriting an existing file, nor does linux seem to support
+    # locking a non-existant file. Thus, this race-condition introducing
+    # hack is carried from morituri to whipper and will be removed when
+    # cdrdao is fixed.
+    fd, tocfile = tempfile.mkstemp(suffix=u'.cdrdao.read-toc.whipper')
+    os.close(fd)
+    os.unlink(tocfile)
+
+    cmd = [CDRDAO, 'read-toc'] + (['--fast-toc'] if fast_toc else []) + [
+           '--device', device, tocfile]
+    # PIPE is the closest to >/dev/null we can get
+    logger.debug("executing %r", cmd)
+    p = Popen(cmd, stdout=PIPE, stderr=PIPE)
+    _, stderr = p.communicate()
+    if p.returncode != 0:
+        msg = 'cdrdao read-toc failed: return code is non-zero: ' + \
+              str(p.returncode)
+        logger.critical(msg)
+        # Gracefully handle missing disc
+        if "ERROR: Unit not ready, giving up." in stderr:
+            raise EjectError(device, "no disc detected")
+        raise IOError(msg)
+
+    toc = TocFile(tocfile)
+    toc.parse()
+    os.unlink(tocfile)
+    return toc
+
+def version():
+    """
+    Return cdrdao version as a string.
+    """
+    cdrdao = Popen(CDRDAO, stderr=PIPE)
+    out, err = cdrdao.communicate()
+    if cdrdao.returncode != 1:
+        logger.warning("cdrdao version detection failed: "
+                       "return code is " + str(cdrdao.returncode))
+        return None
+    m = re.compile(r'^Cdrdao version (?P<version>.*) - \(C\)').search(
+                   err.decode('utf-8'))
+    if not m:
+        logger.warning("cdrdao version detection failed: "
+                       "could not find version")
+        return None
+    return m.group('version')
+
+def ReadTOCTask(device):
+    """
+    stopgap morituri-insanity compatibility layer
+    """
+    return read_toc(device, fast_toc=True)
+
+def ReadTableTask(device):
+    """
+    stopgap morituri-insanity compatibility layer
+    """
+    return read_toc(device)
+
+def getCDRDAOVersion():
+    """
+    stopgap morituri-insanity compatibility layer
+    """
+    return version()