Add qemu 2.4.0

[kvmfornfv.git] / qemu / roms / u-boot / tools / patman / command.py

diff --git a/qemu/roms/u-boot/tools/patman/command.py b/qemu/roms/u-boot/tools/patman/command.py
new file mode 100644 (file)
index 0000000..449d3d0
--- /dev/null
+++ b/qemu/roms/u-boot/tools/patman/command.py
@@ -0,0 +1,101 @@
+# Copyright (c) 2011 The Chromium OS Authors.
+#
+# SPDX-License-Identifier:     GPL-2.0+
+#
+
+import os
+import cros_subprocess
+
+"""Shell command ease-ups for Python."""
+
+class CommandResult:
+    """A class which captures the result of executing a command.
+
+    Members:
+        stdout: stdout obtained from command, as a string
+        stderr: stderr obtained from command, as a string
+        return_code: Return code from command
+        exception: Exception received, or None if all ok
+    """
+    def __init__(self):
+        self.stdout = None
+        self.stderr = None
+        self.return_code = None
+        self.exception = None
+
+
+def RunPipe(pipe_list, infile=None, outfile=None,
+            capture=False, capture_stderr=False, oneline=False,
+            raise_on_error=True, cwd=None, **kwargs):
+    """
+    Perform a command pipeline, with optional input/output filenames.
+
+    Args:
+        pipe_list: List of command lines to execute. Each command line is
+            piped into the next, and is itself a list of strings. For
+            example [ ['ls', '.git'] ['wc'] ] will pipe the output of
+            'ls .git' into 'wc'.
+        infile: File to provide stdin to the pipeline
+        outfile: File to store stdout
+        capture: True to capture output
+        capture_stderr: True to capture stderr
+        oneline: True to strip newline chars from output
+        kwargs: Additional keyword arguments to cros_subprocess.Popen()
+    Returns:
+        CommandResult object
+    """
+    result = CommandResult()
+    last_pipe = None
+    pipeline = list(pipe_list)
+    user_pipestr =  '|'.join([' '.join(pipe) for pipe in pipe_list])
+    while pipeline:
+        cmd = pipeline.pop(0)
+        if last_pipe is not None:
+            kwargs['stdin'] = last_pipe.stdout
+        elif infile:
+            kwargs['stdin'] = open(infile, 'rb')
+        if pipeline or capture:
+            kwargs['stdout'] = cros_subprocess.PIPE
+        elif outfile:
+            kwargs['stdout'] = open(outfile, 'wb')
+        if capture_stderr:
+            kwargs['stderr'] = cros_subprocess.PIPE
+
+        try:
+            last_pipe = cros_subprocess.Popen(cmd, cwd=cwd, **kwargs)
+        except Exception, err:
+            result.exception = err
+            if raise_on_error:
+                raise Exception("Error running '%s': %s" % (user_pipestr, str))
+            result.return_code = 255
+            return result
+
+    if capture:
+        result.stdout, result.stderr, result.combined = (
+                last_pipe.CommunicateFilter(None))
+        if result.stdout and oneline:
+            result.output = result.stdout.rstrip('\r\n')
+        result.return_code = last_pipe.wait()
+    else:
+        result.return_code = os.waitpid(last_pipe.pid, 0)[1]
+    if raise_on_error and result.return_code:
+        raise Exception("Error running '%s'" % user_pipestr)
+    return result
+
+def Output(*cmd):
+    return RunPipe([cmd], capture=True, raise_on_error=False).stdout
+
+def OutputOneLine(*cmd, **kwargs):
+    raise_on_error = kwargs.pop('raise_on_error', True)
+    return (RunPipe([cmd], capture=True, oneline=True,
+            raise_on_error=raise_on_error,
+            **kwargs).stdout.strip())
+
+def Run(*cmd, **kwargs):
+    return RunPipe([cmd], **kwargs).stdout
+
+def RunList(cmd):
+    return RunPipe([cmd], capture=True).stdout
+
+def StopAll():
+    cros_subprocess.stay_alive = False