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1 | a8083063 | Iustin Pop | #!/usr/bin/python
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2 | a8083063 | Iustin Pop | #
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3 | a8083063 | Iustin Pop | |
4 | a8083063 | Iustin Pop | # Copyright (C) 2006, 2007 Google Inc.
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5 | a8083063 | Iustin Pop | #
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6 | a8083063 | Iustin Pop | # This program is free software; you can redistribute it and/or modify
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7 | a8083063 | Iustin Pop | # it under the terms of the GNU General Public License as published by
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8 | a8083063 | Iustin Pop | # the Free Software Foundation; either version 2 of the License, or
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9 | a8083063 | Iustin Pop | # (at your option) any later version.
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10 | a8083063 | Iustin Pop | #
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11 | a8083063 | Iustin Pop | # This program is distributed in the hope that it will be useful, but
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12 | a8083063 | Iustin Pop | # WITHOUT ANY WARRANTY; without even the implied warranty of
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13 | a8083063 | Iustin Pop | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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14 | a8083063 | Iustin Pop | # General Public License for more details.
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15 | a8083063 | Iustin Pop | #
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16 | a8083063 | Iustin Pop | # You should have received a copy of the GNU General Public License
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17 | a8083063 | Iustin Pop | # along with this program; if not, write to the Free Software
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18 | a8083063 | Iustin Pop | # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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19 | a8083063 | Iustin Pop | # 02110-1301, USA.
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20 | a8083063 | Iustin Pop | |
21 | a8083063 | Iustin Pop | |
22 | a8083063 | Iustin Pop | """Module dealing with command line parsing"""
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23 | a8083063 | Iustin Pop | |
24 | a8083063 | Iustin Pop | |
25 | a8083063 | Iustin Pop | import sys |
26 | a8083063 | Iustin Pop | import textwrap |
27 | a8083063 | Iustin Pop | import os.path |
28 | a8083063 | Iustin Pop | import copy |
29 | a8083063 | Iustin Pop | |
30 | a8083063 | Iustin Pop | from ganeti import utils |
31 | a8083063 | Iustin Pop | from ganeti import logger |
32 | a8083063 | Iustin Pop | from ganeti import errors |
33 | a8083063 | Iustin Pop | from ganeti import mcpu |
34 | a8083063 | Iustin Pop | from ganeti import constants |
35 | a8083063 | Iustin Pop | |
36 | a8083063 | Iustin Pop | from optparse import (OptionParser, make_option, TitledHelpFormatter, |
37 | a8083063 | Iustin Pop | Option, OptionValueError, SUPPRESS_HELP) |
38 | a8083063 | Iustin Pop | |
39 | a8083063 | Iustin Pop | __all__ = ["DEBUG_OPT", "NOHDR_OPT", "SEP_OPT", "GenericMain", "SubmitOpCode", |
40 | 137161c9 | Michael Hanselmann | "cli_option", "OutputTable", |
41 | a8083063 | Iustin Pop | "ARGS_NONE", "ARGS_FIXED", "ARGS_ATLEAST", "ARGS_ANY", "ARGS_ONE", |
42 | fe7b0351 | Michael Hanselmann | "USEUNITS_OPT", "FIELDS_OPT", "FORCE_OPT"] |
43 | a8083063 | Iustin Pop | |
44 | a8083063 | Iustin Pop | DEBUG_OPT = make_option("-d", "--debug", default=False, |
45 | a8083063 | Iustin Pop | action="store_true",
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46 | a8083063 | Iustin Pop | help="Turn debugging on")
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47 | a8083063 | Iustin Pop | |
48 | a8083063 | Iustin Pop | NOHDR_OPT = make_option("--no-headers", default=False, |
49 | a8083063 | Iustin Pop | action="store_true", dest="no_headers", |
50 | a8083063 | Iustin Pop | help="Don't display column headers")
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51 | a8083063 | Iustin Pop | |
52 | 137161c9 | Michael Hanselmann | SEP_OPT = make_option("--separator", default=None, |
53 | a8083063 | Iustin Pop | action="store", dest="separator", |
54 | a8083063 | Iustin Pop | help="Separator between output fields"
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55 | a8083063 | Iustin Pop | " (defaults to one space)")
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56 | a8083063 | Iustin Pop | |
57 | a8083063 | Iustin Pop | USEUNITS_OPT = make_option("--human-readable", default=False, |
58 | a8083063 | Iustin Pop | action="store_true", dest="human_readable", |
59 | a8083063 | Iustin Pop | help="Print sizes in human readable format")
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60 | a8083063 | Iustin Pop | |
61 | dcb93971 | Michael Hanselmann | FIELDS_OPT = make_option("-o", "--output", dest="output", action="store", |
62 | dcb93971 | Michael Hanselmann | type="string", help="Select output fields", |
63 | dcb93971 | Michael Hanselmann | metavar="FIELDS")
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64 | dcb93971 | Michael Hanselmann | |
65 | fe7b0351 | Michael Hanselmann | FORCE_OPT = make_option("-f", "--force", dest="force", action="store_true", |
66 | fe7b0351 | Michael Hanselmann | default=False, help="Force the operation") |
67 | fe7b0351 | Michael Hanselmann | |
68 | a8083063 | Iustin Pop | _LOCK_OPT = make_option("--lock-retries", default=None, |
69 | a8083063 | Iustin Pop | type="int", help=SUPPRESS_HELP)
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70 | a8083063 | Iustin Pop | |
71 | a8083063 | Iustin Pop | |
72 | a8083063 | Iustin Pop | def ARGS_FIXED(val): |
73 | a8083063 | Iustin Pop | """Macro-like function denoting a fixed number of arguments"""
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74 | a8083063 | Iustin Pop | return -val
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75 | a8083063 | Iustin Pop | |
76 | a8083063 | Iustin Pop | |
77 | a8083063 | Iustin Pop | def ARGS_ATLEAST(val): |
78 | a8083063 | Iustin Pop | """Macro-like function denoting a minimum number of arguments"""
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79 | a8083063 | Iustin Pop | return val
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80 | a8083063 | Iustin Pop | |
81 | a8083063 | Iustin Pop | |
82 | a8083063 | Iustin Pop | ARGS_NONE = None
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83 | a8083063 | Iustin Pop | ARGS_ONE = ARGS_FIXED(1)
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84 | a8083063 | Iustin Pop | ARGS_ANY = ARGS_ATLEAST(0)
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85 | a8083063 | Iustin Pop | |
86 | a8083063 | Iustin Pop | |
87 | a8083063 | Iustin Pop | def check_unit(option, opt, value): |
88 | a8083063 | Iustin Pop | try:
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89 | a8083063 | Iustin Pop | return utils.ParseUnit(value)
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90 | a8083063 | Iustin Pop | except errors.UnitParseError, err:
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91 | a8083063 | Iustin Pop | raise OptionValueError, ("option %s: %s" % (opt, err)) |
92 | a8083063 | Iustin Pop | |
93 | a8083063 | Iustin Pop | |
94 | a8083063 | Iustin Pop | class CliOption(Option): |
95 | a8083063 | Iustin Pop | TYPES = Option.TYPES + ("unit",)
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96 | a8083063 | Iustin Pop | TYPE_CHECKER = copy.copy(Option.TYPE_CHECKER) |
97 | a8083063 | Iustin Pop | TYPE_CHECKER["unit"] = check_unit
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98 | a8083063 | Iustin Pop | |
99 | a8083063 | Iustin Pop | |
100 | a8083063 | Iustin Pop | # optparse.py sets make_option, so we do it for our own option class, too
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101 | a8083063 | Iustin Pop | cli_option = CliOption |
102 | a8083063 | Iustin Pop | |
103 | a8083063 | Iustin Pop | |
104 | a8083063 | Iustin Pop | def _ParseArgs(argv, commands): |
105 | a8083063 | Iustin Pop | """Parses the command line and return the function which must be
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106 | a8083063 | Iustin Pop | executed together with its arguments
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107 | a8083063 | Iustin Pop |
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108 | a8083063 | Iustin Pop | Arguments:
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109 | a8083063 | Iustin Pop | argv: the command line
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110 | a8083063 | Iustin Pop |
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111 | a8083063 | Iustin Pop | commands: dictionary with special contents, see the design doc for
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112 | a8083063 | Iustin Pop | cmdline handling
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113 | 098c0958 | Michael Hanselmann |
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114 | a8083063 | Iustin Pop | """
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115 | a8083063 | Iustin Pop | if len(argv) == 0: |
116 | a8083063 | Iustin Pop | binary = "<command>"
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117 | a8083063 | Iustin Pop | else:
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118 | a8083063 | Iustin Pop | binary = argv[0].split("/")[-1] |
119 | a8083063 | Iustin Pop | |
120 | a8083063 | Iustin Pop | if len(argv) > 1 and argv[1] == "--version": |
121 | a8083063 | Iustin Pop | print "%s (ganeti) %s" % (binary, constants.RELEASE_VERSION) |
122 | a8083063 | Iustin Pop | # Quit right away. That way we don't have to care about this special
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123 | a8083063 | Iustin Pop | # argument. optparse.py does it the same.
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124 | a8083063 | Iustin Pop | sys.exit(0)
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125 | a8083063 | Iustin Pop | |
126 | a8083063 | Iustin Pop | if len(argv) < 2 or argv[1] not in commands.keys(): |
127 | a8083063 | Iustin Pop | # let's do a nice thing
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128 | a8083063 | Iustin Pop | sortedcmds = commands.keys() |
129 | a8083063 | Iustin Pop | sortedcmds.sort() |
130 | a8083063 | Iustin Pop | print ("Usage: %(bin)s {command} [options...] [argument...]" |
131 | a8083063 | Iustin Pop | "\n%(bin)s <command> --help to see details, or"
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132 | a8083063 | Iustin Pop | " man %(bin)s\n" % {"bin": binary}) |
133 | a8083063 | Iustin Pop | # compute the max line length for cmd + usage
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134 | a8083063 | Iustin Pop | mlen = max([len(" %s %s" % (cmd, commands[cmd][3])) for cmd in commands]) |
135 | a8083063 | Iustin Pop | mlen = min(60, mlen) # should not get here... |
136 | a8083063 | Iustin Pop | # and format a nice command list
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137 | a8083063 | Iustin Pop | print "Commands:" |
138 | a8083063 | Iustin Pop | for cmd in sortedcmds: |
139 | a8083063 | Iustin Pop | cmdstr = " %s %s" % (cmd, commands[cmd][3]) |
140 | a8083063 | Iustin Pop | help_text = commands[cmd][4]
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141 | a8083063 | Iustin Pop | help_lines = textwrap.wrap(help_text, 79-3-mlen) |
142 | a8083063 | Iustin Pop | print "%-*s - %s" % (mlen, cmdstr, |
143 | a8083063 | Iustin Pop | help_lines.pop(0))
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144 | a8083063 | Iustin Pop | for line in help_lines: |
145 | a8083063 | Iustin Pop | print "%-*s %s" % (mlen, "", line) |
146 | a8083063 | Iustin Pop | print
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147 | a8083063 | Iustin Pop | return None, None, None |
148 | a8083063 | Iustin Pop | cmd = argv.pop(1)
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149 | a8083063 | Iustin Pop | func, nargs, parser_opts, usage, description = commands[cmd] |
150 | a8083063 | Iustin Pop | parser_opts.append(_LOCK_OPT) |
151 | a8083063 | Iustin Pop | parser = OptionParser(option_list=parser_opts, |
152 | a8083063 | Iustin Pop | description=description, |
153 | a8083063 | Iustin Pop | formatter=TitledHelpFormatter(), |
154 | a8083063 | Iustin Pop | usage="%%prog %s %s" % (cmd, usage))
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155 | a8083063 | Iustin Pop | parser.disable_interspersed_args() |
156 | a8083063 | Iustin Pop | options, args = parser.parse_args() |
157 | a8083063 | Iustin Pop | if nargs is None: |
158 | a8083063 | Iustin Pop | if len(args) != 0: |
159 | a8083063 | Iustin Pop | print >> sys.stderr, ("Error: Command %s expects no arguments" % cmd) |
160 | a8083063 | Iustin Pop | return None, None, None |
161 | a8083063 | Iustin Pop | elif nargs < 0 and len(args) != -nargs: |
162 | a8083063 | Iustin Pop | print >> sys.stderr, ("Error: Command %s expects %d argument(s)" % |
163 | a8083063 | Iustin Pop | (cmd, -nargs)) |
164 | a8083063 | Iustin Pop | return None, None, None |
165 | a8083063 | Iustin Pop | elif nargs >= 0 and len(args) < nargs: |
166 | a8083063 | Iustin Pop | print >> sys.stderr, ("Error: Command %s expects at least %d argument(s)" % |
167 | a8083063 | Iustin Pop | (cmd, nargs)) |
168 | a8083063 | Iustin Pop | return None, None, None |
169 | a8083063 | Iustin Pop | |
170 | a8083063 | Iustin Pop | return func, options, args
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171 | a8083063 | Iustin Pop | |
172 | a8083063 | Iustin Pop | |
173 | a8083063 | Iustin Pop | def _AskUser(text): |
174 | a8083063 | Iustin Pop | """Ask the user a yes/no question.
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175 | a8083063 | Iustin Pop |
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176 | a8083063 | Iustin Pop | Args:
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177 | a8083063 | Iustin Pop | questionstring - the question to ask.
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178 | a8083063 | Iustin Pop |
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179 | a8083063 | Iustin Pop | Returns:
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180 | a8083063 | Iustin Pop | True or False depending on answer (No for False is default).
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181 | a8083063 | Iustin Pop |
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182 | a8083063 | Iustin Pop | """
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183 | a8083063 | Iustin Pop | try:
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184 | a8083063 | Iustin Pop | f = file("/dev/tty", "r+") |
185 | a8083063 | Iustin Pop | except IOError: |
186 | a8083063 | Iustin Pop | return False |
187 | a8083063 | Iustin Pop | answer = False
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188 | a8083063 | Iustin Pop | try:
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189 | a8083063 | Iustin Pop | f.write(textwrap.fill(text)) |
190 | a8083063 | Iustin Pop | f.write('\n')
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191 | a8083063 | Iustin Pop | f.write("y/[n]: ")
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192 | a8083063 | Iustin Pop | line = f.readline(16).strip().lower()
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193 | a8083063 | Iustin Pop | answer = line in ('y', 'yes') |
194 | a8083063 | Iustin Pop | finally:
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195 | a8083063 | Iustin Pop | f.close() |
196 | a8083063 | Iustin Pop | return answer
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197 | a8083063 | Iustin Pop | |
198 | a8083063 | Iustin Pop | |
199 | a8083063 | Iustin Pop | def SubmitOpCode(op): |
200 | a8083063 | Iustin Pop | """Function to submit an opcode.
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201 | a8083063 | Iustin Pop |
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202 | a8083063 | Iustin Pop | This is just a simple wrapper over the construction of the processor
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203 | a8083063 | Iustin Pop | instance. It should be extended to better handle feedback and
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204 | a8083063 | Iustin Pop | interaction functions.
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205 | a8083063 | Iustin Pop |
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206 | a8083063 | Iustin Pop | """
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207 | a8083063 | Iustin Pop | proc = mcpu.Processor() |
208 | a8083063 | Iustin Pop | return proc.ExecOpCode(op, logger.ToStdout)
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209 | a8083063 | Iustin Pop | |
210 | a8083063 | Iustin Pop | |
211 | a8083063 | Iustin Pop | def GenericMain(commands): |
212 | a8083063 | Iustin Pop | """Generic main function for all the gnt-* commands.
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213 | a8083063 | Iustin Pop |
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214 | a8083063 | Iustin Pop | Argument: a dictionary with a special structure, see the design doc
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215 | a8083063 | Iustin Pop | for command line handling.
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216 | a8083063 | Iustin Pop |
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217 | a8083063 | Iustin Pop | """
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218 | a8083063 | Iustin Pop | # save the program name and the entire command line for later logging
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219 | a8083063 | Iustin Pop | if sys.argv:
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220 | a8083063 | Iustin Pop | binary = os.path.basename(sys.argv[0]) or sys.argv[0] |
221 | a8083063 | Iustin Pop | if len(sys.argv) >= 2: |
222 | a8083063 | Iustin Pop | binary += " " + sys.argv[1] |
223 | a8083063 | Iustin Pop | old_cmdline = " ".join(sys.argv[2:]) |
224 | a8083063 | Iustin Pop | else:
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225 | a8083063 | Iustin Pop | old_cmdline = ""
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226 | a8083063 | Iustin Pop | else:
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227 | a8083063 | Iustin Pop | binary = "<unknown program>"
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228 | a8083063 | Iustin Pop | old_cmdline = ""
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229 | a8083063 | Iustin Pop | |
230 | a8083063 | Iustin Pop | func, options, args = _ParseArgs(sys.argv, commands) |
231 | a8083063 | Iustin Pop | if func is None: # parse error |
232 | a8083063 | Iustin Pop | return 1 |
233 | a8083063 | Iustin Pop | |
234 | a8083063 | Iustin Pop | options._ask_user = _AskUser |
235 | a8083063 | Iustin Pop | |
236 | a8083063 | Iustin Pop | logger.SetupLogging(debug=options.debug, program=binary) |
237 | a8083063 | Iustin Pop | |
238 | a8083063 | Iustin Pop | try:
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239 | a8083063 | Iustin Pop | utils.Lock('cmd', max_retries=options.lock_retries, debug=options.debug)
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240 | a8083063 | Iustin Pop | except errors.LockError, err:
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241 | a8083063 | Iustin Pop | logger.ToStderr(str(err))
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242 | a8083063 | Iustin Pop | return 1 |
243 | a8083063 | Iustin Pop | |
244 | a8083063 | Iustin Pop | if old_cmdline:
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245 | a8083063 | Iustin Pop | logger.Info("run with arguments '%s'" % old_cmdline)
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246 | a8083063 | Iustin Pop | else:
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247 | a8083063 | Iustin Pop | logger.Info("run with no arguments")
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248 | a8083063 | Iustin Pop | |
249 | a8083063 | Iustin Pop | try:
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250 | a8083063 | Iustin Pop | try:
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251 | a8083063 | Iustin Pop | result = func(options, args) |
252 | a8083063 | Iustin Pop | except errors.ConfigurationError, err:
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253 | a8083063 | Iustin Pop | logger.Error("Corrupt configuration file: %s" % err)
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254 | a8083063 | Iustin Pop | logger.ToStderr("Aborting.")
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255 | a8083063 | Iustin Pop | result = 2
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256 | a8083063 | Iustin Pop | except errors.HooksAbort, err:
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257 | a8083063 | Iustin Pop | logger.ToStderr("Failure: hooks execution failed:")
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258 | a8083063 | Iustin Pop | for node, script, out in err.args[0]: |
259 | a8083063 | Iustin Pop | if out:
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260 | a8083063 | Iustin Pop | logger.ToStderr(" node: %s, script: %s, output: %s" %
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261 | a8083063 | Iustin Pop | (node, script, out)) |
262 | a8083063 | Iustin Pop | else:
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263 | a8083063 | Iustin Pop | logger.ToStderr(" node: %s, script: %s (no output)" %
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264 | a8083063 | Iustin Pop | (node, script)) |
265 | a8083063 | Iustin Pop | result = 1
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266 | a8083063 | Iustin Pop | except errors.HooksFailure, err:
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267 | a8083063 | Iustin Pop | logger.ToStderr("Failure: hooks general failure: %s" % str(err)) |
268 | a8083063 | Iustin Pop | result = 1
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269 | a8083063 | Iustin Pop | except errors.OpPrereqError, err:
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270 | a8083063 | Iustin Pop | logger.ToStderr("Failure: prerequisites not met for this"
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271 | a8083063 | Iustin Pop | " operation:\n%s" % str(err)) |
272 | a8083063 | Iustin Pop | result = 1
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273 | a8083063 | Iustin Pop | except errors.OpExecError, err:
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274 | a8083063 | Iustin Pop | logger.ToStderr("Failure: command execution error:\n%s" % str(err)) |
275 | a8083063 | Iustin Pop | result = 1
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276 | a8083063 | Iustin Pop | finally:
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277 | a8083063 | Iustin Pop | utils.Unlock('cmd')
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278 | a8083063 | Iustin Pop | utils.LockCleanup() |
279 | a8083063 | Iustin Pop | |
280 | a8083063 | Iustin Pop | return result
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281 | 137161c9 | Michael Hanselmann | |
282 | 137161c9 | Michael Hanselmann | |
283 | 137161c9 | Michael Hanselmann | def OutputTable(headers, fields, separator, data, |
284 | 137161c9 | Michael Hanselmann | numfields=None, unitfields=None): |
285 | 137161c9 | Michael Hanselmann | """Prints a table with headers and different fields.
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286 | 137161c9 | Michael Hanselmann |
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287 | 137161c9 | Michael Hanselmann | Args:
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288 | 137161c9 | Michael Hanselmann | headers: Dict of header titles or None if no headers should be shown
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289 | 137161c9 | Michael Hanselmann | fields: List of fields to show
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290 | 137161c9 | Michael Hanselmann | separator: String used to separate fields or None for spaces
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291 | 137161c9 | Michael Hanselmann | data: Data to be printed
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292 | 137161c9 | Michael Hanselmann | numfields: List of fields to be aligned to right
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293 | 137161c9 | Michael Hanselmann | unitfields: List of fields to be formatted as units
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294 | 137161c9 | Michael Hanselmann |
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295 | 137161c9 | Michael Hanselmann | """
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296 | 137161c9 | Michael Hanselmann | if numfields is None: |
297 | 137161c9 | Michael Hanselmann | numfields = [] |
298 | 137161c9 | Michael Hanselmann | if unitfields is None: |
299 | 137161c9 | Michael Hanselmann | unitfields = [] |
300 | 137161c9 | Michael Hanselmann | |
301 | 137161c9 | Michael Hanselmann | format_fields = [] |
302 | 137161c9 | Michael Hanselmann | for field in fields: |
303 | 137161c9 | Michael Hanselmann | if separator is not None: |
304 | 137161c9 | Michael Hanselmann | format_fields.append("%s")
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305 | 137161c9 | Michael Hanselmann | elif field in numfields: |
306 | 137161c9 | Michael Hanselmann | format_fields.append("%*s")
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307 | 137161c9 | Michael Hanselmann | else:
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308 | 137161c9 | Michael Hanselmann | format_fields.append("%-*s")
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309 | 137161c9 | Michael Hanselmann | |
310 | 137161c9 | Michael Hanselmann | if separator is None: |
311 | 137161c9 | Michael Hanselmann | mlens = [0 for name in fields] |
312 | 137161c9 | Michael Hanselmann | format = ' '.join(format_fields)
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313 | 137161c9 | Michael Hanselmann | else:
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314 | 137161c9 | Michael Hanselmann | format = separator.replace("%", "%%").join(format_fields) |
315 | 137161c9 | Michael Hanselmann | |
316 | 137161c9 | Michael Hanselmann | for row in data: |
317 | 137161c9 | Michael Hanselmann | for idx, val in enumerate(row): |
318 | 137161c9 | Michael Hanselmann | if fields[idx] in unitfields: |
319 | 137161c9 | Michael Hanselmann | try:
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320 | 137161c9 | Michael Hanselmann | val = int(val)
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321 | 137161c9 | Michael Hanselmann | except ValueError: |
322 | 137161c9 | Michael Hanselmann | pass
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323 | 137161c9 | Michael Hanselmann | else:
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324 | 137161c9 | Michael Hanselmann | val = row[idx] = utils.FormatUnit(val) |
325 | 137161c9 | Michael Hanselmann | if separator is None: |
326 | 137161c9 | Michael Hanselmann | mlens[idx] = max(mlens[idx], len(val)) |
327 | 137161c9 | Michael Hanselmann | |
328 | 137161c9 | Michael Hanselmann | if headers:
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329 | 137161c9 | Michael Hanselmann | args = [] |
330 | 137161c9 | Michael Hanselmann | for idx, name in enumerate(fields): |
331 | 137161c9 | Michael Hanselmann | hdr = headers[name] |
332 | 137161c9 | Michael Hanselmann | if separator is None: |
333 | 137161c9 | Michael Hanselmann | mlens[idx] = max(mlens[idx], len(hdr)) |
334 | 137161c9 | Michael Hanselmann | args.append(mlens[idx]) |
335 | 137161c9 | Michael Hanselmann | args.append(hdr) |
336 | 137161c9 | Michael Hanselmann | logger.ToStdout(format % tuple(args))
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337 | 137161c9 | Michael Hanselmann | |
338 | 137161c9 | Michael Hanselmann | for line in data: |
339 | 137161c9 | Michael Hanselmann | args = [] |
340 | 137161c9 | Michael Hanselmann | for idx in xrange(len(fields)): |
341 | 137161c9 | Michael Hanselmann | if separator is None: |
342 | 137161c9 | Michael Hanselmann | args.append(mlens[idx]) |
343 | 137161c9 | Michael Hanselmann | args.append(line[idx]) |
344 | 137161c9 | Michael Hanselmann | logger.ToStdout(format % tuple(args)) |