|o||-a NAMES or --argument-names NAMES assigns the value of successive command-line arguments to the names given in NAMES.|
|o||-d DESCRIPTION or --description=DESCRIPTION is a description of what the function does, suitable as a completion description.|
|o||-w WRAPPED_COMMAND or --wraps=WRAPPED_COMMAND causes the function to inherit completions from the given wrapped command. See the documentation for complete for more information.|
|o||-e or --on-event EVENT_NAME tells fish to run this function when the specified named event is emitted. Fish internally generates named events e.g. when showing the prompt.|
|o||-v or --on-variable VARIABLE_NAME tells fish to run this function when the variable VARIABLE_NAME changes value.|
|o||-j PGID or --on-job-exit PGID tells fish to run this function when the job with group ID PGID exits. Instead of PGID, the string caller can be specified. This is only legal when in a command substitution, and will result in the handler being triggered by the exit of the job which created this command substitution.|
|o||-p PID or --on-process-exit PID tells fish to run this function when the fish child process with process ID PID exits.|
|o||-s or --on-signal SIGSPEC tells fish to run this function when the signal SIGSPEC is delivered. SIGSPEC can be a signal number, or the signal name, such as SIGHUP (or just HUP).|
|o||-S or --no-scope-shadowing allows the function to access the variables of calling functions. Normally, any variables inside the function that have the same name as variables from the calling function are shadowed, and their contents is independent of the calling function.|
|o||-V or --inherit-variable NAME snapshots the value of the variable NAME and defines a local variable with that same name and value when the function is executed.|
If the user enters any additional arguments after the function, they are inserted into the environment variable array $argv. If the --argument-names option is provided, the arguments are also assigned to names specified in that option.
By using one of the event handler switches, a function can be made to run automatically at specific events. The user may generate new events using the emit builtin. Fish generates the following named events:
|o||fish_prompt, which is emitted whenever a new fish prompt is about to be displayed.|
|o||fish_command_not_found, which is emitted whenever a command lookup failed.|
|o||fish_preexec, which is emitted right before executing an interactive command. The commandline is passed as the first parameter.|
|o||fish_postexec, which is emitted right after executing an interactive command. The commandline is passed as the first parameter.|
function ll ls -l $argv end
will run the ls command, using the -l option, while passing on any additional files and switches to ls.
function mkdir -d Create a directory and set CWD command mkdir $argv if test $status = 0 switch $argv[(count $argv)] case -*
case * cd $argv[(count $argv)] return end end end
This will run the mkdir command, and if it is successful, change the current working directory to the one just created.
function notify set -l job (jobs -l -g) or begin; echo There are no jobs >&; return 1; end
function _notify_job_$job --on-job-exit $job --inherit-variable job echo -n \a # beep functions -e _notify_job_$job end end
This will beep when the most recent job completes.
|Version 2.2.0||FUNCTION (1)||Mon Jul 6 2015|