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hadoop.sh
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Tue, Feb 25, 21:39

hadoop.sh
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#!/usr/bin/env bash
# Licensed to the Apache Software Foundation (ASF) under one or more
# contributor license agreements. See the NOTICE file distributed with
# this work for additional information regarding copyright ownership.
# The ASF licenses this file to You under the Apache License, Version 2.0
# (the "License"); you may not use this file except in compliance with
# the License. You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
# Provides tab completion for the main hadoop script.
#
# On debian-based systems, place in /etc/bash_completion.d/ and either restart
# Bash or source the script manually (. /etc/bash_completion.d/hadoop.sh).
_hadoop() {
local script cur prev temp
COMPREPLY=()
cur=${COMP_WORDS[COMP_CWORD]}
prev=${COMP_WORDS[COMP_CWORD-1]}
script=`which ${COMP_WORDS[0]}`
# Bash lets you tab complete things even if the script doesn't
# exist (or isn't executable). Check to make sure it is, as we
# need to execute it to get options/info
if [ -f "$script" -a -x "$script" ]; then
case $COMP_CWORD in
1)
# Completing the first argument (the command).
temp=`$script | grep -n "^\s*or"`;
temp=`$script | head -n $((${temp%%:*} - 1)) | awk '/^ / {print $1}' | sort | uniq`;
COMPREPLY=(`compgen -W "${temp}" -- ${cur}`);
return 0;;
2)
# Completing the second arg (first arg to the command)
# The output of commands isn't hugely consistent, so certain
# names are hardcoded and parsed differently. Some aren't
# handled at all (mostly ones without args).
case ${COMP_WORDS[1]} in
dfs | dfsadmin | fs | job | pipes)
# One option per line, enclosed in square brackets
temp=`$script ${COMP_WORDS[1]} 2>&1 | awk '/^[ \t]*\[/ {gsub("[[\\]]", ""); print $1}'`;
COMPREPLY=(`compgen -W "${temp}" -- ${cur}`);
return 0;;
jar)
# Any (jar) file
COMPREPLY=(`compgen -A file -- ${cur}`);
return 0;;
namenode)
# All options specified in one line,
# enclosed in [] and separated with |
temp=`$script ${COMP_WORDS[1]} -help 2>&1 | grep Usage: | cut -d '[' -f 2- | awk '{gsub("] \\| \\[|]", " "); print $0}'`;
COMPREPLY=(`compgen -W "${temp}" -- ${cur}`);
return 0;;
*)
# Other commands - no idea
return 1;;
esac;;
*)
# Additional args
case ${COMP_WORDS[1]} in
dfs | fs)
# DFS/FS subcommand completion
# Pull the list of options, grep for the one the user is trying to use,
# and then select the description of the relevant argument
temp=$((${COMP_CWORD} - 1));
temp=`$script ${COMP_WORDS[1]} 2>&1 | grep -- "${COMP_WORDS[2]} " | awk '{gsub("[[ \\]]", ""); print $0}' | cut -d '<' -f ${temp}`;
if [ ${#temp} -lt 1 ]; then
# No match
return 1;
fi;
temp=${temp:0:$((${#temp} - 1))};
# Now do completion based on the argument
case $temp in
path | src | dst)
# DFS path completion
temp=`$script ${COMP_WORDS[1]} -ls "${cur}*" 2>&1 | grep -vE '^Found ' | cut -f 1 | awk '{gsub("^.* ", ""); print $0;}'`
COMPREPLY=(`compgen -W "${temp}" -- ${cur}`);
return 0;;
localsrc | localdst)
# Local path completion
COMPREPLY=(`compgen -A file -- ${cur}`);
return 0;;
*)
# Other arguments - no idea
return 1;;
esac;;
*)
# Other subcommands - no idea
return 1;;
esac;
esac;
fi;
}
complete -F _hadoop hadoop

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