我希望使用shell脚本调用长形式和短形式的命令行选项。
我知道可以使用getopts,但是像在Perl中一样,我不能用shell做同样的事情。
关于如何做到这一点的任何想法,这样我就可以使用如下选项:
./shell.sh --copyfile abc.pl /tmp/
./shell.sh -c abc.pl /tmp/
在上面,这两个命令对我的shell意味着同样的事情,但使用getopts,我还不能实现这些?
我希望使用shell脚本调用长形式和短形式的命令行选项。
我知道可以使用getopts,但是像在Perl中一样,我不能用shell做同样的事情。
关于如何做到这一点的任何想法,这样我就可以使用如下选项:
./shell.sh --copyfile abc.pl /tmp/
./shell.sh -c abc.pl /tmp/
在上面,这两个命令对我的shell意味着同样的事情,但使用getopts,我还不能实现这些?
当前回答
改进的解决方案:
# translate long options to short
# Note: This enable long options but disable "--?*" in $OPTARG, or disable long options after "--" in option fields.
for ((i=1;$#;i++)) ; do
case "$1" in
--)
# [ ${args[$((i-1))]} == ... ] || EndOpt=1 ;;& # DIRTY: we still can handle some execptions...
EndOpt=1 ;;&
--version) ((EndOpt)) && args[$i]="$1" || args[$i]="-V";;
# default case : short option use the first char of the long option:
--?*) ((EndOpt)) && args[$i]="$1" || args[$i]="-${1:2:1}";;
# pass through anything else:
*) args[$i]="$1" ;;
esac
shift
done
# reset the translated args
set -- "${args[@]}"
function usage {
echo "Usage: $0 [options] files" >&2
exit $1
}
# now we can process with getopt
while getopts ":hvVc:" opt; do
case $opt in
h) usage ;;
v) VERBOSE=true ;;
V) echo $Version ; exit ;;
c) source $OPTARG ;;
\?) echo "unrecognized option: -$opt" ; usage -1 ;;
:)
echo "option -$OPTARG requires an argument"
usage -1
;;
esac
done
shift $((OPTIND-1))
[[ "$1" == "--" ]] && shift
其他回答
一个简单的DIY,只获得长名称的参数:
Use:
$ ./test-args.sh --a1 a1 --a2 "a 2" --a3 --a4= --a5=a5 --a6="a 6"
a1 = "a1"
a2 = "a 2"
a3 = "TRUE"
a4 = ""
a5 = "a5"
a6 = "a 6"
a7 = ""
脚本:
#!/bin/bash
function main() {
ARGS=`getArgs "$@"`
a1=`echo "$ARGS" | getNamedArg a1`
a2=`echo "$ARGS" | getNamedArg a2`
a3=`echo "$ARGS" | getNamedArg a3`
a4=`echo "$ARGS" | getNamedArg a4`
a5=`echo "$ARGS" | getNamedArg a5`
a6=`echo "$ARGS" | getNamedArg a6`
a7=`echo "$ARGS" | getNamedArg a7`
echo "a1 = \"$a1\""
echo "a2 = \"$a2\""
echo "a3 = \"$a3\""
echo "a4 = \"$a4\""
echo "a5 = \"$a5\""
echo "a6 = \"$a6\""
echo "a7 = \"$a7\""
exit 0
}
function getArgs() {
for arg in "$@"; do
echo "$arg"
done
}
function getNamedArg() {
ARG_NAME=$1
sed --regexp-extended --quiet --expression="
s/^--$ARG_NAME=(.*)\$/\1/p # Get arguments in format '--arg=value': [s]ubstitute '--arg=value' by 'value', and [p]rint
/^--$ARG_NAME\$/ { # Get arguments in format '--arg value' ou '--arg'
n # - [n]ext, because in this format, if value exists, it will be the next argument
/^--/! p # - If next doesn't starts with '--', it is the value of the actual argument
/^--/ { # - If next do starts with '--', it is the next argument and the actual argument is a boolean one
# Then just repla[c]ed by TRUE
c TRUE
}
}
"
}
main "$@"
下面是一个实际使用长选项的getopt的示例:
aflag=no
bflag=no
cargument=none
# options may be followed by one colon to indicate they have a required argument
if ! options=$(getopt -o abc: -l along,blong,clong: -- "$@")
then
# something went wrong, getopt will put out an error message for us
exit 1
fi
set -- $options
while [ $# -gt 0 ]
do
case $1 in
-a|--along) aflag="yes" ;;
-b|--blong) bflag="yes" ;;
# for options with required arguments, an additional shift is required
-c|--clong) cargument="$2" ; shift;;
(--) shift; break;;
(-*) echo "$0: error - unrecognized option $1" 1>&2; exit 1;;
(*) break;;
esac
shift
done
我还没有足够的代表来评论或投票他的解决方案,但他的答案对我来说非常有效。我遇到的唯一问题是参数以单引号结尾(所以我把它们去掉了)。
我还添加了一些示例用法和帮助文本。我将在这里附上我略微扩展的版本:
#!/bin/bash
# getopt example
# from: https://stackoverflow.com/questions/402377/using-getopts-in-bash-shell-script-to-get-long-and-short-command-line-options
HELP_TEXT=\
" USAGE:\n
Accepts - and -- flags, can specify options that require a value, and can be in any order. A double-hyphen (--) will stop processing options.\n\n
Accepts the following forms:\n\n
getopt-example.sh -a -b -c value-for-c some-arg\n
getopt-example.sh -c value-for-c -a -b some-arg\n
getopt-example.sh -abc some-arg\n
getopt-example.sh --along --blong --clong value-for-c -a -b -c some-arg\n
getopt-example.sh some-arg --clong value-for-c\n
getopt-example.sh
"
aflag=false
bflag=false
cargument=""
# options may be followed by one colon to indicate they have a required argument
if ! options=$(getopt -o abc:h\? -l along,blong,help,clong: -- "$@")
then
# something went wrong, getopt will put out an error message for us
exit 1
fi
set -- $options
while [ $# -gt 0 ]
do
case $1 in
-a|--along) aflag=true ;;
-b|--blong) bflag=true ;;
# for options with required arguments, an additional shift is required
-c|--clong) cargument="$2" ; shift;;
-h|--help|-\?) echo -e $HELP_TEXT; exit;;
(--) shift; break;;
(-*) echo "$0: error - unrecognized option $1" 1>&2; exit 1;;
(*) break;;
esac
shift
done
# to remove the single quotes around arguments, pipe the output into:
# | sed -e "s/^'\\|'$//g" (just leading/trailing) or | sed -e "s/'//g" (all)
echo aflag=${aflag}
echo bflag=${bflag}
echo cargument=${cargument}
while [ $# -gt 0 ]
do
echo arg=$1
shift
if [[ $aflag == true ]]; then
echo a is true
fi
done
另一种方式…
# translate long options to short
for arg
do
delim=""
case "$arg" in
--help) args="${args}-h ";;
--verbose) args="${args}-v ";;
--config) args="${args}-c ";;
# pass through anything else
*) [[ "${arg:0:1}" == "-" ]] || delim="\""
args="${args}${delim}${arg}${delim} ";;
esac
done
# reset the translated args
eval set -- $args
# now we can process with getopt
while getopts ":hvc:" opt; do
case $opt in
h) usage ;;
v) VERBOSE=true ;;
c) source $OPTARG ;;
\?) usage ;;
:)
echo "option -$OPTARG requires an argument"
usage
;;
esac
done
#!/bin/bash
while getopts "abc:d:" flag
do
case $flag in
a) echo "[getopts:$OPTIND]==> -$flag";;
b) echo "[getopts:$OPTIND]==> -$flag";;
c) echo "[getopts:$OPTIND]==> -$flag $OPTARG";;
d) echo "[getopts:$OPTIND]==> -$flag $OPTARG";;
esac
done
shift $((OPTIND-1))
echo "[otheropts]==> $@"
exit
.
#!/bin/bash
until [ -z "$1" ]; do
case $1 in
"--dlong")
shift
if [ "${1:1:0}" != "-" ]
then
echo "==> dlong $1"
shift
fi;;
*) echo "==> other $1"; shift;;
esac
done
exit