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I want to support both short and long options in bash scripts, so one can:
$ foo -ax --long-key val -b -y SOME FILE NAMES is it possible?
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The main differences between getopts and getopt are as follows: getopt does not handle empty flag arguments well; getopts does. getopts is included in the Bourne shell and Bash; getopt needs to be installed separately. getopt allows for the parsing of long options ( --help instead of -h ); getopts does not.
Parsing Short Command-Line Options With getopts. In Bash, we can use both short and long command-line options. The short option starts with the single hyphen (-) character followed by a single alphanumeric character, whereas the long option starts with the double hyphen (–) characters followed by multiple characters.
Description. The getopts command is a Korn/POSIX Shell built-in command that retrieves options and option-arguments from a list of parameters. An option begins with a + (plus sign) or a - (minus sign) followed by a character. An option that does not begin with either a + or a - ends the OptionString.
getopt supports long options.
http://man7.org/linux/man-pages/man1/getopt.1.html
Here is an example using your arguments:
#!/bin/bash OPTS=`getopt -o axby -l long-key: -- "$@"` if [ $? != 0 ] then exit 1 fi eval set -- "$OPTS" while true ; do case "$1" in -a) echo "Got a"; shift;; -b) echo "Got b"; shift;; -x) echo "Got x"; shift;; -y) echo "Got y"; shift;; --long-key) echo "Got long-key, arg: $2"; shift 2;; --) shift; break;; esac done echo "Args:" for arg do echo $arg done Output of $ foo -ax --long-key val -b -y SOME FILE NAMES:
Got a Got x Got long-key, arg: val Got b Got y Args: SOME FILE NAMES If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
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