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#!/usr/bin/python |
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# |
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|
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# Copyright (C) 2009 Google Inc. |
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# |
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# This program is free software; you can redistribute it and/or modify |
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# it under the terms of the GNU General Public License as published by |
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# the Free Software Foundation; either version 2 of the License, or |
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# (at your option) any later version. |
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# |
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# This program is distributed in the hope that it will be useful, but |
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# WITHOUT ANY WARRANTY; without even the implied warranty of |
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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# General Public License for more details. |
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# |
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# You should have received a copy of the GNU General Public License |
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# along with this program; if not, write to the Free Software |
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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
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# 02110-1301, USA. |
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|
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|
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import os |
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import re |
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from cStringIO import StringIO |
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|
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from ganeti import constants |
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from ganeti import cli |
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from ganeti import utils |
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from ganeti import build |
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|
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# _autoconf shouldn't be imported from anywhere except constants.py, but we're |
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# making an exception here because this script is only used at build time. |
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from ganeti import _autoconf |
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|
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|
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class ShellWriter: |
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"""Helper class to write scripts with indentation. |
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|
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""" |
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INDENT_STR = " " |
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|
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def __init__(self, fh): |
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self._fh = fh |
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self._indent = 0 |
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|
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def IncIndent(self): |
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"""Increase indentation level by 1. |
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|
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""" |
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self._indent += 1 |
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|
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def DecIndent(self): |
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"""Decrease indentation level by 1. |
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|
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""" |
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assert self._indent > 0 |
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self._indent -= 1 |
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|
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def Write(self, txt, *args): |
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"""Write line to output file. |
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|
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""" |
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self._fh.write(self._indent * self.INDENT_STR) |
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|
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if args: |
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self._fh.write(txt % args) |
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else: |
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self._fh.write(txt) |
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|
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self._fh.write("\n") |
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|
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|
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def WritePreamble(sw): |
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"""Writes the script preamble. |
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|
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Helper functions should be written here. |
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|
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""" |
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sw.Write("# This script is automatically generated at build time.") |
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sw.Write("# Do not modify manually.") |
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|
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sw.Write("_ganeti_dbglog() {") |
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sw.IncIndent() |
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try: |
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sw.Write("if [[ -n \"$GANETI_COMPL_LOG\" ]]; then") |
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sw.IncIndent() |
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try: |
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sw.Write("{") |
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sw.IncIndent() |
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try: |
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sw.Write("echo ---") |
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sw.Write("echo \"$@\"") |
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sw.Write("echo") |
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finally: |
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sw.DecIndent() |
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sw.Write("} >> $GANETI_COMPL_LOG") |
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finally: |
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sw.DecIndent() |
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sw.Write("fi") |
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finally: |
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sw.DecIndent() |
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sw.Write("}") |
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|
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sw.Write("_ganeti_nodes() {") |
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sw.IncIndent() |
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try: |
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node_list_path = os.path.join(constants.DATA_DIR, "ssconf_node_list") |
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sw.Write("cat %s 2>/dev/null || :", utils.ShellQuote(node_list_path)) |
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finally: |
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sw.DecIndent() |
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sw.Write("}") |
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|
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sw.Write("_ganeti_instances() {") |
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sw.IncIndent() |
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try: |
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instance_list_path = os.path.join(constants.DATA_DIR, |
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"ssconf_instance_list") |
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sw.Write("cat %s 2>/dev/null || :", utils.ShellQuote(instance_list_path)) |
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finally: |
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sw.DecIndent() |
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sw.Write("}") |
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|
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sw.Write("_ganeti_jobs() {") |
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sw.IncIndent() |
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try: |
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# FIXME: this is really going into the internals of the job queue |
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sw.Write(("local jlist=$( shopt -s nullglob &&" |
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" cd %s 2>/dev/null && echo job-* || : )"), |
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utils.ShellQuote(constants.QUEUE_DIR)) |
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sw.Write('echo "${jlist//job-/}"') |
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finally: |
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sw.DecIndent() |
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sw.Write("}") |
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|
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for (fnname, paths) in [ |
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("os", constants.OS_SEARCH_PATH), |
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("iallocator", constants.IALLOCATOR_SEARCH_PATH), |
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]: |
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sw.Write("_ganeti_%s() {", fnname) |
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sw.IncIndent() |
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try: |
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# FIXME: Make querying the master for all OSes cheap |
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for path in paths: |
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sw.Write("( shopt -s nullglob && cd %s 2>/dev/null && echo * || : )", |
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utils.ShellQuote(path)) |
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finally: |
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sw.DecIndent() |
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sw.Write("}") |
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|
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# Params: <offset> <options with values> <options without values> |
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# Result variable: $first_arg_idx |
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sw.Write("_ganeti_find_first_arg() {") |
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sw.IncIndent() |
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try: |
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sw.Write("local w i") |
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|
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sw.Write("first_arg_idx=") |
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sw.Write("for (( i=$1; i < COMP_CWORD; ++i )); do") |
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sw.IncIndent() |
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try: |
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sw.Write("w=${COMP_WORDS[$i]}") |
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|
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# Skip option value |
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sw.Write("""if [[ -n "$2" && "$w" == @($2) ]]; then let ++i""") |
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|
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# Skip |
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sw.Write("""elif [[ -n "$3" && "$w" == @($3) ]]; then :""") |
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|
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# Ah, we found the first argument |
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sw.Write("else first_arg_idx=$i; break;") |
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sw.Write("fi") |
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finally: |
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sw.DecIndent() |
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sw.Write("done") |
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finally: |
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sw.DecIndent() |
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sw.Write("}") |
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|
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# Params: <list of options separated by space> |
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# Input variable: $first_arg_idx |
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# Result variables: $arg_idx, $choices |
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sw.Write("_ganeti_list_options() {") |
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sw.IncIndent() |
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try: |
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sw.Write("""if [[ -z "$first_arg_idx" ]]; then""") |
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sw.IncIndent() |
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try: |
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sw.Write("arg_idx=0") |
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# Show options only if the current word starts with a dash |
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sw.Write("""if [[ "$cur" == -* ]]; then""") |
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sw.IncIndent() |
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try: |
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sw.Write("choices=$1") |
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finally: |
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sw.DecIndent() |
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sw.Write("fi") |
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sw.Write("return") |
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finally: |
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sw.DecIndent() |
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sw.Write("fi") |
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|
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# Calculate position of current argument |
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sw.Write("arg_idx=$(( COMP_CWORD - first_arg_idx ))") |
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sw.Write("choices=") |
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finally: |
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sw.DecIndent() |
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sw.Write("}") |
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|
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# Params: <long options with equal sign> <all options> |
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# Result variable: $optcur |
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sw.Write("_ganeti_checkopt() {") |
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sw.IncIndent() |
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try: |
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sw.Write("""if [[ -n "$1" && "$cur" == @($1) ]]; then""") |
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sw.IncIndent() |
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try: |
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sw.Write("optcur=\"${cur#--*=}\"") |
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sw.Write("return 0") |
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finally: |
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sw.DecIndent() |
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sw.Write("""elif [[ -n "$2" && "$prev" == @($2) ]]; then""") |
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sw.IncIndent() |
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try: |
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sw.Write("optcur=\"$cur\"") |
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sw.Write("return 0") |
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finally: |
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sw.DecIndent() |
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sw.Write("fi") |
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|
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sw.Write("_ganeti_dbglog optcur=\"'$optcur'\"") |
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|
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sw.Write("return 1") |
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finally: |
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sw.DecIndent() |
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sw.Write("}") |
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|
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# Params: <compgen options> |
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# Result variable: $COMPREPLY |
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sw.Write("_ganeti_compgen() {") |
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sw.IncIndent() |
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try: |
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sw.Write("""COMPREPLY=( $(compgen "$@") )""") |
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sw.Write("_ganeti_dbglog COMPREPLY=\"${COMPREPLY[@]}\"") |
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finally: |
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sw.DecIndent() |
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sw.Write("}") |
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|
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|
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def WriteCompReply(sw, args, cur="\"$cur\""): |
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sw.Write("_ganeti_compgen %s -- %s", args, cur) |
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sw.Write("return") |
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|
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|
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class CompletionWriter: |
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"""Command completion writer class. |
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|
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""" |
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def __init__(self, arg_offset, opts, args): |
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self.arg_offset = arg_offset |
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self.opts = opts |
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self.args = args |
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|
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for opt in opts: |
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# While documented, these variables aren't seen as public attributes by |
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# pylint. pylint: disable-msg=W0212 |
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opt.all_names = sorted(opt._short_opts + opt._long_opts) |
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|
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def _FindFirstArgument(self, sw): |
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ignore = [] |
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skip_one = [] |
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|
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for opt in self.opts: |
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if opt.takes_value(): |
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# Ignore value |
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for i in opt.all_names: |
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if i.startswith("--"): |
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ignore.append("%s=*" % utils.ShellQuote(i)) |
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skip_one.append(utils.ShellQuote(i)) |
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else: |
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ignore.extend([utils.ShellQuote(i) for i in opt.all_names]) |
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|
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ignore = sorted(utils.UniqueSequence(ignore)) |
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skip_one = sorted(utils.UniqueSequence(skip_one)) |
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|
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if ignore or skip_one: |
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# Try to locate first argument |
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sw.Write("_ganeti_find_first_arg %s %s %s", |
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self.arg_offset + 1, |
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utils.ShellQuote("|".join(skip_one)), |
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utils.ShellQuote("|".join(ignore))) |
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else: |
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# When there are no options the first argument is always at position |
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# offset + 1 |
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sw.Write("first_arg_idx=%s", self.arg_offset + 1) |
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|
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def _CompleteOptionValues(self, sw): |
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# Group by values |
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# "values" -> [optname1, optname2, ...] |
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values = {} |
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|
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for opt in self.opts: |
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if not opt.takes_value(): |
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continue |
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|
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# Only static choices implemented so far (e.g. no node list) |
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suggest = getattr(opt, "completion_suggest", None) |
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|
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if not suggest: |
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suggest = opt.choices |
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|
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if (isinstance(suggest, (int, long)) and |
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suggest in cli.OPT_COMPL_ALL): |
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key = suggest |
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elif suggest: |
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key = " ".join(sorted(suggest)) |
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else: |
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key = "" |
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|
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values.setdefault(key, []).extend(opt.all_names) |
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|
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# Don't write any code if there are no option values |
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if not values: |
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return |
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|
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cur = "\"$optcur\"" |
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|
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wrote_opt = False |
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|
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for (suggest, allnames) in values.iteritems(): |
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longnames = [i for i in allnames if i.startswith("--")] |
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|
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if wrote_opt: |
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condcmd = "elif" |
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else: |
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condcmd = "if" |
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|
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sw.Write("%s _ganeti_checkopt %s %s; then", condcmd, |
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utils.ShellQuote("|".join(["%s=*" % i for i in longnames])), |
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utils.ShellQuote("|".join(allnames))) |
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sw.IncIndent() |
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try: |
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if suggest == cli.OPT_COMPL_MANY_NODES: |
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# TODO: Implement comma-separated values |
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WriteCompReply(sw, "-W ''", cur=cur) |
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elif suggest == cli.OPT_COMPL_ONE_NODE: |
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WriteCompReply(sw, "-W \"$(_ganeti_nodes)\"", cur=cur) |
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elif suggest == cli.OPT_COMPL_ONE_INSTANCE: |
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WriteCompReply(sw, "-W \"$(_ganeti_instances)\"", cur=cur) |
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elif suggest == cli.OPT_COMPL_ONE_OS: |
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WriteCompReply(sw, "-W \"$(_ganeti_os)\"", cur=cur) |
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elif suggest == cli.OPT_COMPL_ONE_IALLOCATOR: |
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WriteCompReply(sw, "-W \"$(_ganeti_iallocator)\"", cur=cur) |
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elif suggest == cli.OPT_COMPL_INST_ADD_NODES: |
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sw.Write("local tmp= node1= pfx= curvalue=\"${optcur#*:}\"") |
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|
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sw.Write("if [[ \"$optcur\" == *:* ]]; then") |
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sw.IncIndent() |
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try: |
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sw.Write("node1=\"${optcur%%:*}\"") |
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|
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sw.Write("if [[ \"$COMP_WORDBREAKS\" != *:* ]]; then") |
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sw.IncIndent() |
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try: |
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sw.Write("pfx=\"$node1:\"") |
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finally: |
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sw.DecIndent() |
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sw.Write("fi") |
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finally: |
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sw.DecIndent() |
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sw.Write("fi") |
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|
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sw.Write("_ganeti_dbglog pfx=\"'$pfx'\" curvalue=\"'$curvalue'\"" |
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" node1=\"'$node1'\"") |
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|
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sw.Write("for i in $(_ganeti_nodes); do") |
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sw.IncIndent() |
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try: |
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sw.Write("if [[ -z \"$node1\" ]]; then") |
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sw.IncIndent() |
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try: |
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sw.Write("tmp=\"$tmp $i $i:\"") |
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finally: |
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sw.DecIndent() |
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sw.Write("elif [[ \"$i\" != \"$node1\" ]]; then") |
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sw.IncIndent() |
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try: |
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sw.Write("tmp=\"$tmp $i\"") |
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finally: |
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sw.DecIndent() |
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sw.Write("fi") |
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finally: |
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sw.DecIndent() |
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sw.Write("done") |
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|
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WriteCompReply(sw, "-P \"$pfx\" -W \"$tmp\"", cur="\"$curvalue\"") |
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else: |
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WriteCompReply(sw, "-W %s" % utils.ShellQuote(suggest), cur=cur) |
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finally: |
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sw.DecIndent() |
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|
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wrote_opt = True |
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|
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if wrote_opt: |
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sw.Write("fi") |
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|
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return |
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|
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def _CompleteArguments(self, sw): |
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if not (self.opts or self.args): |
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return |
411 |
|
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all_option_names = [] |
413 |
for opt in self.opts: |
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all_option_names.extend(opt.all_names) |
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all_option_names.sort() |
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|
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# List options if no argument has been specified yet |
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sw.Write("_ganeti_list_options %s", |
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utils.ShellQuote(" ".join(all_option_names))) |
420 |
|
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if self.args: |
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last_idx = len(self.args) - 1 |
423 |
last_arg_end = 0 |
424 |
varlen_arg_idx = None |
425 |
wrote_arg = False |
426 |
|
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# Write some debug comments |
428 |
for idx, arg in enumerate(self.args): |
429 |
sw.Write("# %s: %r", idx, arg) |
430 |
|
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sw.Write("compgenargs=") |
432 |
|
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for idx, arg in enumerate(self.args): |
434 |
assert arg.min is not None and arg.min >= 0 |
435 |
assert not (idx < last_idx and arg.max is None) |
436 |
|
437 |
if arg.min != arg.max or arg.max is None: |
438 |
if varlen_arg_idx is not None: |
439 |
raise Exception("Only one argument can have a variable length") |
440 |
varlen_arg_idx = idx |
441 |
|
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compgenargs = [] |
443 |
|
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if isinstance(arg, cli.ArgUnknown): |
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choices = "" |
446 |
elif isinstance(arg, cli.ArgSuggest): |
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choices = utils.ShellQuote(" ".join(arg.choices)) |
448 |
elif isinstance(arg, cli.ArgInstance): |
449 |
choices = "$(_ganeti_instances)" |
450 |
elif isinstance(arg, cli.ArgNode): |
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choices = "$(_ganeti_nodes)" |
452 |
elif isinstance(arg, cli.ArgJobId): |
453 |
choices = "$(_ganeti_jobs)" |
454 |
elif isinstance(arg, cli.ArgFile): |
455 |
choices = "" |
456 |
compgenargs.append("-f") |
457 |
elif isinstance(arg, cli.ArgCommand): |
458 |
choices = "" |
459 |
compgenargs.append("-c") |
460 |
elif isinstance(arg, cli.ArgHost): |
461 |
choices = "" |
462 |
compgenargs.append("-A hostname") |
463 |
else: |
464 |
raise Exception("Unknown argument type %r" % arg) |
465 |
|
466 |
if arg.min == 1 and arg.max == 1: |
467 |
cmpcode = """"$arg_idx" == %d""" % (last_arg_end) |
468 |
elif arg.max is None: |
469 |
cmpcode = """"$arg_idx" -ge %d""" % (last_arg_end) |
470 |
elif arg.min <= arg.max: |
471 |
cmpcode = (""""$arg_idx" -ge %d && "$arg_idx" -lt %d""" % |
472 |
(last_arg_end, last_arg_end + arg.max)) |
473 |
else: |
474 |
raise Exception("Unable to generate argument position condition") |
475 |
|
476 |
last_arg_end += arg.min |
477 |
|
478 |
if choices or compgenargs: |
479 |
if wrote_arg: |
480 |
condcmd = "elif" |
481 |
else: |
482 |
condcmd = "if" |
483 |
|
484 |
sw.Write("""%s [[ %s ]]; then""", condcmd, cmpcode) |
485 |
sw.IncIndent() |
486 |
try: |
487 |
if choices: |
488 |
sw.Write("""choices="$choices "%s""", choices) |
489 |
if compgenargs: |
490 |
sw.Write("compgenargs=%s", |
491 |
utils.ShellQuote(" ".join(compgenargs))) |
492 |
finally: |
493 |
sw.DecIndent() |
494 |
|
495 |
wrote_arg = True |
496 |
|
497 |
if wrote_arg: |
498 |
sw.Write("fi") |
499 |
|
500 |
if self.args: |
501 |
WriteCompReply(sw, """-W "$choices" $compgenargs""") |
502 |
else: |
503 |
# $compgenargs exists only if there are arguments |
504 |
WriteCompReply(sw, '-W "$choices"') |
505 |
|
506 |
def WriteTo(self, sw): |
507 |
self._FindFirstArgument(sw) |
508 |
self._CompleteOptionValues(sw) |
509 |
self._CompleteArguments(sw) |
510 |
|
511 |
|
512 |
def WriteCompletion(sw, scriptname, funcname, |
513 |
commands=None, |
514 |
opts=None, args=None): |
515 |
"""Writes the completion code for one command. |
516 |
|
517 |
@type sw: ShellWriter |
518 |
@param sw: Script writer |
519 |
@type scriptname: string |
520 |
@param scriptname: Name of command line program |
521 |
@type funcname: string |
522 |
@param funcname: Shell function name |
523 |
@type commands: list |
524 |
@param commands: List of all subcommands in this program |
525 |
|
526 |
""" |
527 |
sw.Write("%s() {", funcname) |
528 |
sw.IncIndent() |
529 |
try: |
530 |
sw.Write("local " |
531 |
' cur="${COMP_WORDS[COMP_CWORD]}"' |
532 |
' prev="${COMP_WORDS[COMP_CWORD-1]}"' |
533 |
' i first_arg_idx choices compgenargs arg_idx optcur') |
534 |
|
535 |
sw.Write("_ganeti_dbglog cur=\"$cur\" prev=\"$prev\"") |
536 |
sw.Write("[[ -n \"$GANETI_COMPL_LOG\" ]] &&" |
537 |
" _ganeti_dbglog \"$(set | grep ^COMP_)\"") |
538 |
|
539 |
sw.Write("COMPREPLY=()") |
540 |
|
541 |
if opts is not None and args is not None: |
542 |
assert not commands |
543 |
CompletionWriter(0, opts, args).WriteTo(sw) |
544 |
|
545 |
else: |
546 |
sw.Write("""if [[ "$COMP_CWORD" == 1 ]]; then""") |
547 |
sw.IncIndent() |
548 |
try: |
549 |
# Complete the command name |
550 |
WriteCompReply(sw, |
551 |
("-W %s" % |
552 |
utils.ShellQuote(" ".join(sorted(commands.keys()))))) |
553 |
finally: |
554 |
sw.DecIndent() |
555 |
sw.Write("fi") |
556 |
|
557 |
# We're doing options and arguments to commands |
558 |
sw.Write("""case "${COMP_WORDS[1]}" in""") |
559 |
for cmd, (_, argdef, optdef, _, _) in commands.iteritems(): |
560 |
if not (argdef or optdef): |
561 |
continue |
562 |
|
563 |
# TODO: Group by arguments and options |
564 |
sw.Write("%s)", utils.ShellQuote(cmd)) |
565 |
sw.IncIndent() |
566 |
try: |
567 |
CompletionWriter(1, optdef, argdef).WriteTo(sw) |
568 |
finally: |
569 |
sw.DecIndent() |
570 |
|
571 |
sw.Write(";;") |
572 |
sw.Write("esac") |
573 |
finally: |
574 |
sw.DecIndent() |
575 |
sw.Write("}") |
576 |
|
577 |
sw.Write("complete -F %s -o filenames %s", |
578 |
utils.ShellQuote(funcname), |
579 |
utils.ShellQuote(scriptname)) |
580 |
|
581 |
|
582 |
def GetFunctionName(name): |
583 |
return "_" + re.sub(r"[^a-z0-9]+", "_", name.lower()) |
584 |
|
585 |
|
586 |
def GetCommands(filename, module): |
587 |
"""Returns the commands defined in a module. |
588 |
|
589 |
Aliases are also added as commands. |
590 |
|
591 |
""" |
592 |
try: |
593 |
commands = getattr(module, "commands") |
594 |
except AttributeError: |
595 |
raise Exception("Script %s doesn't have 'commands' attribute" % |
596 |
filename) |
597 |
|
598 |
# Add the implicit "--help" option |
599 |
help_option = cli.cli_option("-h", "--help", default=False, |
600 |
action="store_true") |
601 |
|
602 |
for (_, _, optdef, _, _) in commands.itervalues(): |
603 |
if help_option not in optdef: |
604 |
optdef.append(help_option) |
605 |
if cli.DEBUG_OPT not in optdef: |
606 |
optdef.append(cli.DEBUG_OPT) |
607 |
|
608 |
# Use aliases |
609 |
aliases = getattr(module, "aliases", {}) |
610 |
if aliases: |
611 |
commands = commands.copy() |
612 |
for name, target in aliases.iteritems(): |
613 |
commands[name] = commands[target] |
614 |
|
615 |
return commands |
616 |
|
617 |
|
618 |
def main(): |
619 |
buf = StringIO() |
620 |
sw = ShellWriter(buf) |
621 |
|
622 |
WritePreamble(sw) |
623 |
|
624 |
# gnt-* scripts |
625 |
for scriptname in _autoconf.GNT_SCRIPTS: |
626 |
filename = "scripts/%s" % scriptname |
627 |
|
628 |
WriteCompletion(sw, scriptname, |
629 |
GetFunctionName(scriptname), |
630 |
commands=GetCommands(filename, |
631 |
build.LoadModule(filename))) |
632 |
|
633 |
# Burnin script |
634 |
burnin = build.LoadModule("tools/burnin") |
635 |
WriteCompletion(sw, "%s/burnin" % constants.TOOLSDIR, "_ganeti_burnin", |
636 |
opts=burnin.OPTIONS, args=burnin.ARGUMENTS) |
637 |
|
638 |
print buf.getvalue() |
639 |
|
640 |
|
641 |
if __name__ == "__main__": |
642 |
main() |