def get_lineno_last_page(self, fileobj, runner):
if not fileobj.filename or not exists(runner.dump_dir.filename_public_path(fileobj)):
return None
dumpfile = DumpFile(self.wiki,
runner.dump_dir.filename_public_path(fileobj, self.wiki.date),
fileobj, self.verbose)
pipeline = dumpfile.setup_uncompression_command()
grep = self.wiki.config.grep
if not exists(grep):
raise BackupError("grep command %s not found" % grep)
pipeline.append([grep, "-n", "<page>"])
tail = self.wiki.config.tail
if not exists(tail):
raise BackupError("tail command %s not found" % tail)
pipeline.append([tail, "-1"])
# without shell
proc = CommandPipeline(pipeline, quiet=True)
proc.run_pipeline_get_output()
if (proc.exited_successfully() or
(proc.get_failed_cmds_with_retcode() ==
[[-signal.SIGPIPE, pipeline[0]]]) or
(proc.get_failed_cmds_with_retcode() ==
[[signal.SIGPIPE + 128, pipeline[0]]])):
output = proc.output()
# 339915646: <page>
if ':' in output:
linecount = output.split(':')[0]
if linecount.isdigit():
return linecount
return None
def get_last_lines_from_n(self, fileobj, runner, count):
if not fileobj.filename or not exists(runner.dump_dir.filename_public_path(fileobj)):
return None
dumpfile = DumpFile(self.wiki,
runner.dump_dir.filename_public_path(fileobj, self.wiki.date),
fileobj, self.verbose)
pipeline = dumpfile.setup_uncompression_command()
tail = self.wiki.config.tail
if not exists(tail):
raise BackupError("tail command %s not found" % tail)
tail_esc = MiscUtils.shell_escape(tail)
pipeline.append([tail, "-n", "+%s" % count])
# without shell
proc = CommandPipeline(pipeline, quiet=True)
proc.run_pipeline_get_output()
if (proc.exited_successfully() or
(proc.get_failed_cmds_with_retcode() ==
[[-signal.SIGPIPE, pipeline[0]]]) or
(proc.get_failed_cmds_with_retcode() ==
[[signal.SIGPIPE + 128, pipeline[0]]])):
last_lines = proc.output()
return last_lines
def get_first_500_lines(self):
if self.first_lines:
return self.first_lines
if not self.filename or not exists(self.filename):
return None
pipeline = self.setup_uncompression_command()
if not exists(self._wiki.config.head):
raise BackupError("head command %s not found" % self._wiki.config.head)
head = self._wiki.config.head
head_esc = MiscUtils.shell_escape(head)
pipeline.append([head, "-500"])
# without shell
proc = CommandPipeline(pipeline, quiet=True)
proc.run_pipeline_get_output()
if (proc.exited_successfully() or
(proc.get_failed_cmds_with_retcode() ==
[[-signal.SIGPIPE, pipeline[0]]]) or
(proc.get_failed_cmds_with_retcode() ==
[[signal.SIGPIPE + 128, pipeline[0]]])):
self.first_lines = proc.output()
return self.first_lines
def build_recombine_command_string(self, runner, files, output_file, compression_command,
uncompression_command, end_header_marker="</siteinfo>"):
output_filename = runner.dump_dir.filename_public_path(output_file)
partnum = 0
recombines = []
if not exists(runner.wiki.config.head):
raise BackupError("head command %s not found" % runner.wiki.config.head)
head = runner.wiki.config.head
if not exists(runner.wiki.config.tail):
raise BackupError("tail command %s not found" % runner.wiki.config.tail)
tail = runner.wiki.config.tail
if not exists(runner.wiki.config.grep):
raise BackupError("grep command %s not found" % runner.wiki.config.grep)
grep = runner.wiki.config.grep
# we assume the result is always going to be run in a subshell.
# much quicker than this script trying to read output
# and pass it to a subprocess
output_filename_esc = MiscUtils.shell_escape(output_filename)
head_esc = MiscUtils.shell_escape(head)
tail_esc = MiscUtils.shell_escape(tail)
grep_esc = MiscUtils.shell_escape(grep)
uncompression_command_esc = uncompression_command[:]
for command in uncompression_command_esc:
command = MiscUtils.shell_escape(command)
for command in compression_command:
command = MiscUtils.shell_escape(command)
if not files:
raise BackupError("No files for the recombine step found in %s." % self.name())
for file_obj in files:
# uh oh FIXME
# f = MiscUtils.shell_escape(file_obj.filename)
fpath = runner.dump_dir.filename_public_path(file_obj)
partnum = partnum + 1
pipeline = []
uncompress_this_file = uncompression_command[:]
uncompress_this_file.append(fpath)
pipeline.append(uncompress_this_file)
# warning: we figure any header (<siteinfo>...</siteinfo>)
# is going to be less than 2000 lines!
pipeline.append([head, "-2000"])
pipeline.append([grep, "-n", end_header_marker])
# without shell
proc = CommandPipeline(pipeline, quiet=True)
proc.run_pipeline_get_output()
if ((proc.output()) and
(proc.exited_successfully() or
proc.get_failed_cmds_with_retcode() ==
[[-signal.SIGPIPE, uncompress_this_file]] or
proc.get_failed_cmds_with_retcode() ==
[[signal.SIGPIPE + 128, uncompress_this_file]])):
(header_end_num, junk_unused) = proc.output().split(":", 1)
# get header_end_num
else:
raise BackupError("Could not find 'end of header' marker for %s" % fpath)
recombine = " ".join(uncompress_this_file)
header_end_num = int(header_end_num) + 1
if partnum == 1:
# first file, put header and contents
recombine = recombine + " | %s -n -1 " % head
elif partnum == len(files):
# last file, put footer
recombine = recombine + (" | %s -n +%s" % (tail, header_end_num))
else:
# put contents only
recombine = recombine + (" | %s -n +%s" % (tail, header_end_num))
recombine = recombine + " | %s -n -1 " % head
recombines.append(recombine)
recombine_command_string = ("(" + ";".join(recombines) + ")" + "|" +
"%s %s" % (compression_command, output_filename))
return recombine_command_string