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We are using only :: in a synopsis for fishscript examples given of the command being documented.
101 lines
4.0 KiB
ReStructuredText
101 lines
4.0 KiB
ReStructuredText
.. _cmd-fish:
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.. program::fish
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fish - the friendly interactive shell
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=====================================
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Synopsis
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--------
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| ``fish`` [*OPTIONS*] [*FILE* [ARGS ...]]
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| ``fish`` [*OPTIONS*] [**-c** *COMMAND* [ARGS ...]]
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Description
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-----------
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:command:`fish` is a command-line shell written mainly with interactive use in mind.
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This page briefly describes the options for invoking :command:`fish`.
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The :ref:`full manual <intro>` is available in HTML by using the :command:`help` command from inside fish, and in the `fish-doc(1)` man page.
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The :ref:`tutorial <tutorial>` is available as HTML via ``help tutorial`` or in `man fish-tutorial`.
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The following options are available:
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**-c** or **--command=COMMAND**
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Evaluate the specified commands instead of reading from the commandline, passing additional positional arguments through ``$argv``.
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**-C** or **--init-command=COMMANDS**
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Evaluate specified commands after reading the configuration but before executing command specified by **-c** or reading interactive input.
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**-d** or **--debug=DEBUG_CATEGORIES**
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Enables debug output and specify a pattern for matching debug categories.
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See :ref:`Debugging <debugging-fish>` below for details.
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**-o** or **--debug-output=DEBUG_FILE**
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Specifies a file path to receive the debug output, including categories and :envvar:`fish_trace`.
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The default is stderr.
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**-i** or **--interactive**
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The shell is interactive.
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**-l** or **--login**
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Act as if invoked as a login shell.
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**-N** or **--no-config**
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Do not read configuration files.
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**-n** or **--no-execute**
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Do not execute any commands, only perform syntax checking.
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**-p** or **--profile=PROFILE_FILE**
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when :command:`fish` exits, output timing information on all executed commands to the specified file.
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This excludes time spent starting up and reading the configuration.
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**--profile-startup=PROFILE_FILE**
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Will write timing for ``fish`` startup to specified file.
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**-P** or **--private**
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Enables :ref:`private mode <private-mode>`: **fish** will not access old or store new history.
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**--print-rusage-self**
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When :command:`fish` exits, output stats from getrusage.
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**--print-debug-categories**
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Print all debug categories, and then exit.
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**-v** or **--version**
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Print version and exit.
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**-f** or **--features=FEATURES**
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Enables one or more comma-separated :ref:`feature flags <featureflags>`.
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The ``fish`` exit status is generally the :ref:`exit status of the last foreground command <variables-status>`.
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.. _debugging-fish:
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Debugging
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---------
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While fish provides extensive support for :ref:`debugging fish scripts <debugging>`, it is also possible to debug and instrument its internals.
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Debugging can be enabled by passing the **--debug** option.
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For example, the following command turns on debugging for background IO thread events, in addition to the default categories, i.e. *debug*, *error*, *warning*, and *warning-path*:
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::
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> fish --debug=iothread
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Available categories are listed by ``fish --print-debug-categories``. The **--debug** option accepts a comma-separated list of categories, and supports glob syntax.
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The following command turns on debugging for *complete*, *history*, *history-file*, and *profile-history*, as well as the default categories:
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::
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> fish --debug='complete,*history*'
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Debug messages output to stderr by default. Note that if :envvar:`fish_trace` is set, execution tracing also outputs to stderr by default. You can output to a file using the **--debug-output** option:
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::
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> fish --debug='complete,*history*' --debug-output=/tmp/fish.log --init-command='set fish_trace on'
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These options can also be changed via the :envvar:`FISH_DEBUG` and :envvar:`FISH_DEBUG_OUTPUT` variables.
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The categories enabled via **--debug** are *added* to the ones enabled by $FISH_DEBUG, so they can be disabled by prefixing them with **-** (**reader-*,-ast*** enables reader debugging and disables ast debugging).
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The file given in **--debug-output** takes precedence over the file in :envvar:`FISH_DEBUG_OUTPUT`.
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