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This committed the sin of introducing a concept by giving it two names: > An alias, or wrapper, around ``ls`` might look like this The term "wrapper" doesn't pull its weight here. It's simpler to just call them aliases throughout. We do use "a simple wrapping function" in another place, but that's to define "alias", not as a separate name.
63 lines
2.1 KiB
ReStructuredText
63 lines
2.1 KiB
ReStructuredText
.. _cmd-alias:
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alias - create a function
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=========================
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Synopsis
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--------
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.. synopsis::
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alias
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alias [--save] NAME DEFINITION
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alias [--save] NAME=DEFINITION
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Description
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-----------
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``alias`` is a simple wrapper for the ``function`` builtin, which creates a function wrapping a command. It has similar syntax to POSIX shell ``alias``. For other uses, it is recommended to define a :doc:`function <function>`.
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If you want to ease your interactive use, to save typing, consider using an :doc:`abbreviation <abbr>` instead.
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``fish`` marks functions that have been created by ``alias`` by including the command used to create them in the function description. You can list ``alias``-created functions by running ``alias`` without arguments. They must be erased using ``functions -e``.
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- ``NAME`` is the name of the alias
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- ``DEFINITION`` is the actual command to execute. ``alias`` automatically appends ``$argv``, so that all parameters used with the alias are passed to the actual command.
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You cannot create an alias to a function with the same name. Note that spaces need to be escaped in the call to ``alias`` just like at the command line, *even inside quoted parts*.
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The following options are available:
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**-h** or **--help**
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Displays help about using this command.
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**-s** or **--save**
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Saves the function created by the alias into your fish configuration directory using :doc:`funcsave <funcsave>`.
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Example
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-------
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The following code will create ``rmi``, which runs ``rm`` with additional arguments on every invocation.
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::
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alias rmi="rm -i"
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# This is equivalent to entering the following function:
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function rmi --wraps rm --description 'alias rmi=rm -i'
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rm -i $argv
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end
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# This needs to have the spaces escaped or "Chrome.app..."
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# will be seen as an argument to "/Applications/Google":
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alias chrome='/Applications/Google\ Chrome.app/Contents/MacOS/Google\ Chrome banana'
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See more
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--------
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1. The :doc:`function <function>` command this builds on.
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2. :ref:`Functions <syntax-function>`.
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3. :ref:`Defining aliases <syntax-aliases>`.
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