mirror of
https://github.com/jorgebucaran/fisher
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146 lines
2.8 KiB
Groff
146 lines
2.8 KiB
Groff
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.\" generated with Ronn/v0.7.3
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.\" http://github.com/rtomayko/ronn/tree/0.7.3
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.
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.TH "GETOPTS" "1" "January 2016" "" "fisherman"
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.
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.SH "NAME"
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\fBgetopts\fR \- Parse CLI options
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.
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.SH "SYNOPSIS"
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\fBgetopts\fR [\fIoptions\fR \.\.\.]
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.
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.br
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\fBgetopts\fR [\fIoptions\fR \.\.\.] \fB|\fR \fBwhile\fR read \-l key value; \.\.\.; \fBend\fR
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.
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.br
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.
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.SH "DESCRIPTION"
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getopts is a tool to help parsing command\-line arguments\. It is designed to process command line arguments that follow the POSIX Utility Syntax Guidelines\. If no arguments are given it returns \fB1\fR\.
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.
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.SH "USAGE"
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In the following example:
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.
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.IP "" 4
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.
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.nf
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getopts \-ab1 \-\-foo=bar baz
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.
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.fi
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.
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.IP "" 0
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.
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.P
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And its output:
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.
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.IP "" 4
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.
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.nf
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a
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b 1
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foo bar
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_ baz
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.
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.fi
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.
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.IP "" 0
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.
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.P
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The items on the left represent the option flags or \fIkeys\fR associated with the CLI\. The items on the right are the option \fIvalues\fR\. The underscore \fB_\fR character is the default \fIkey\fR for arguments without a key\.
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.
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.P
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Use \fBread\fR(1) to process the generated stream and \fBswitch\fR(1) to match patterns:
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.
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.IP "" 4
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.
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.nf
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getopts \-ab1 \-\-foo=bar baz | while read \-l key option
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switch $key
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case _
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case a
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case b
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case foo
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end
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end
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.
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.fi
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.
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.IP "" 0
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.
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.SH "OPTIONS"
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None\.
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.
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.SH "EXAMPLES"
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The following is a mock of \fBfish\fR(1) CLI missing the implementation:
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.
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.IP "" 4
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.
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.nf
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function fish
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set \-l mode
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set \-l flags
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set \-l commands
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set \-l debug_level
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getopts $argv | while read \-l key value
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switch $key
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case c command
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set commands $commands $value
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case d debug\-level
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set debug_level $value
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case i interactive
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set mode $value
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case l login
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set mode $value
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case n no\-execute
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set mode $value
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case p profile
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set flags $flags $value
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case h help
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printf "usage: $_ [OPTIONS] [\-c command] [FILE [ARGUMENTS\.\.\.]]\en"
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return
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case \e*
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printf "$_: \'%s\' is not a valid option\.\en" $key
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return 1
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end
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end
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# Implementation
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end
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.
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.fi
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.
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.IP "" 0
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.
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.SH "BUGS"
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.
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.IP "\(bu" 4
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getopts does \fInot\fR read the standard input\. Use getopts to collect options and the standard input to process a stream of data relevant to your program\.
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.
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.IP "\(bu" 4
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A double dash, \fB\-\-\fR, marks the end of options\. Arguments after this sequence are placed in the default underscore key, \fB_\fR\.
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.
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.IP "\(bu" 4
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The getopts described in this document is \fInot\fR equivalent to the getopts \fIbuiltin\fR found in other shells\. This tool is only available for \fBfish\fR(1)\.
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.
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.IP "" 0
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.
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.SH "AUTHORS"
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Jorge Bucaran \fIj@bucaran\.me\fR\.
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.
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.SH "SEE ALSO"
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POSIX Utility Syntax Guidelines [goo\.gl/yrgQn9]
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.
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.br
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