mirror of
https://github.com/fish-shell/fish-shell
synced 2024-12-29 06:13:20 +00:00
340de73172
Previously, when a command wasn't found, fish would emit the
"fish_command_not_found" *event*.
This was annoying as it was hard to override (the code ended up
checking for a function called `__fish_command_not_found_handler`
anyway!), the setup was ugly,
and it's useless - there is no use case for multiple command-not-found handlers.
Instead, let's just call a function `fish_command_not_found` if it
exists, or print the default message otherwise.
The event is completely removed, but because a missing event is not an error
(MEISNAE in C++-speak) this isn't an issue.
Note that, for backwards-compatibility, we still keep the default
handler function around even tho the new one is hard-coded in C++.
Also, if we detect a previous handler, the new handler just calls it.
This way, the backwards-compatible way to install a custom handler is:
```fish
function __fish_command_not_found_handler --on-event fish_command_not_found
# do a little dance, make a little love, get down tonight
end
```
and the new hotness is
```fish
function fish_command_not_found
# do the thing
end
```
Fixes #7293.
251 lines
8.6 KiB
Fish
251 lines
8.6 KiB
Fish
# Main file for fish command completions. This file contains various
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# common helper functions for the command completions. All actual
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# completions are located in the completions subdirectory.
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#
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# Set default field separators
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#
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set -g IFS \n\ \t
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set -qg __fish_added_user_paths
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or set -g __fish_added_user_paths
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# For one-off upgrades of the fish version, see __fish_config_interactive.fish
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if not set -q __fish_initialized
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set -U __fish_initialized 0
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if set -q __fish_init_2_39_8
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set __fish_initialized 2398
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else if set -q __fish_init_2_3_0
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set __fish_initialized 2300
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end
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end
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#
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# Create the default command_not_found handler
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#
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function __fish_default_command_not_found_handler
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printf "fish: Unknown command: %s\n" (string escape -- $argv[1]) >&2
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end
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if not status --is-interactive
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# Hook up the default as the command_not_found handler
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# if we are not interactive to avoid custom handlers.
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function fish_command_not_found --on-event fish_command_not_found
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__fish_default_command_not_found_handler $argv
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end
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end
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#
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# Set default search paths for completions and shellscript functions
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# unless they already exist
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#
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# __fish_data_dir, __fish_sysconf_dir, __fish_help_dir, __fish_bin_dir
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# are expected to have been set up by read_init from fish.cpp
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# Grab extra directories (as specified by the build process, usually for
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# third-party packages to ship completions &c.
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set -l __extra_completionsdir
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set -l __extra_functionsdir
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set -l __extra_confdir
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if test -f $__fish_data_dir/__fish_build_paths.fish
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source $__fish_data_dir/__fish_build_paths.fish
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end
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# Compute the directories for vendor configuration. We want to include
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# all of XDG_DATA_DIRS, as well as the __extra_* dirs defined above.
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set -l xdg_data_dirs
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if set -q XDG_DATA_DIRS
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set --path xdg_data_dirs $XDG_DATA_DIRS
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set xdg_data_dirs (string replace -r '([^/])/$' '$1' -- $xdg_data_dirs)/fish
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else
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set xdg_data_dirs $__fish_data_dir
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end
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set -l vendor_completionsdirs
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set -l vendor_functionsdirs
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set -l vendor_confdirs
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# Don't load vendor directories when running unit tests
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if not set -q FISH_UNIT_TESTS_RUNNING
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set vendor_completionsdirs $xdg_data_dirs/vendor_completions.d
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set vendor_functionsdirs $xdg_data_dirs/vendor_functions.d
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set vendor_confdirs $xdg_data_dirs/vendor_conf.d
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# Ensure that extra directories are always included.
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if not contains -- $__extra_completionsdir $vendor_completionsdirs
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set -a vendor_completionsdirs $__extra_completionsdir
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end
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if not contains -- $__extra_functionsdir $vendor_functionsdirs
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set -a vendor_functionsdirs $__extra_functionsdir
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end
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if not contains -- $__extra_confdir $vendor_confdirs
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set -a vendor_confdirs $__extra_confdir
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end
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end
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# Set up function and completion paths. Make sure that the fish
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# default functions/completions are included in the respective path.
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if not set -q fish_function_path
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set fish_function_path $__fish_config_dir/functions $__fish_sysconf_dir/functions $vendor_functionsdirs $__fish_data_dir/functions
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else if not contains -- $__fish_data_dir/functions $fish_function_path
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set -a fish_function_path $__fish_data_dir/functions
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end
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if not set -q fish_complete_path
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set fish_complete_path $__fish_config_dir/completions $__fish_sysconf_dir/completions $vendor_completionsdirs $__fish_data_dir/completions $__fish_user_data_dir/generated_completions
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else if not contains -- $__fish_data_dir/completions $fish_complete_path
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set -a fish_complete_path $__fish_data_dir/completions
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end
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# Add a handler for when fish_user_path changes, so we can apply the same changes to PATH
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function __fish_reconstruct_path -d "Update PATH when fish_user_paths changes" --on-variable fish_user_paths
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set -l local_path $PATH
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for x in $__fish_added_user_paths
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set -l idx (contains --index -- $x $local_path)
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and set -e local_path[$idx]
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end
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set -g __fish_added_user_paths
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if set -q fish_user_paths
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# Explicitly split on ":" because $fish_user_paths might not be a path variable,
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# but $PATH definitely is.
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for x in (string split ":" -- $fish_user_paths[-1..1])
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if set -l idx (contains --index -- $x $local_path)
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set -e local_path[$idx]
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else
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set -ga __fish_added_user_paths $x
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end
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set -p local_path $x
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end
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end
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set -xg PATH $local_path
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end
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#
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# Launch debugger on SIGTRAP
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#
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function fish_sigtrap_handler --on-signal TRAP --no-scope-shadowing --description "Signal handler for the TRAP signal. Launches a debug prompt."
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breakpoint
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end
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#
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# When a prompt is first displayed, make sure that interactive
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# mode-specific initializations have been performed.
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# This handler removes itself after it is first called.
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#
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function __fish_on_interactive --on-event fish_prompt
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__fish_config_interactive
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functions -e __fish_on_interactive
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end
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# Set the locale if it isn't explicitly set. Allowing the lack of locale env vars to imply the
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# C/POSIX locale causes too many problems. Do this before reading the snippets because they might be
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# in UTF-8 (with non-ASCII characters).
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__fish_set_locale
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# Upgrade pre-existing abbreviations from the old "key=value" to the new "key value" syntax.
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# This needs to be in share/config.fish because __fish_config_interactive is called after sourcing
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# config.fish, which might contain abbr calls.
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if test $__fish_initialized -lt 2300
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if set -q fish_user_abbreviations
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set -l fab
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for abbr in $fish_user_abbreviations
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set -a fab (string replace -r '^([^ =]+)=(.*)$' '$1 $2' -- $abbr)
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end
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set fish_user_abbreviations $fab
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end
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end
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#
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# Some things should only be done for login terminals
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# This used to be in etc/config.fish - keep it here to keep the semantics
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#
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if status --is-login
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if command -sq /usr/libexec/path_helper
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# Adapt construct_path from the macOS /usr/libexec/path_helper
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# executable for fish; see
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# https://opensource.apple.com/source/shell_cmds/shell_cmds-203/path_helper/path_helper.c.auto.html .
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function __fish_macos_set_env -d "set an environment variable like path_helper does (macOS only)"
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set -l result
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# Populate path according to config files
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for path_file in $argv[2] $argv[3]/*
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if [ -f $path_file ]
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while read -l entry
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if not contains -- $entry $result
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test -n "$entry"
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and set -a result $entry
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end
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end <$path_file
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end
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end
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# Merge in any existing path elements
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for existing_entry in $$argv[1]
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if not contains -- $existing_entry $result
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set -a result $existing_entry
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end
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end
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set -xg $argv[1] $result
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end
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__fish_macos_set_env PATH /etc/paths '/etc/paths.d'
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if [ -n "$MANPATH" ]
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__fish_macos_set_env MANPATH /etc/manpaths '/etc/manpaths.d'
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end
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functions -e __fish_macos_set_env
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end
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#
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# Put linux consoles in unicode mode.
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#
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if test "$TERM" = linux
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and string match -qir '\.UTF' -- $LANG
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and command -sq unicode_start
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unicode_start
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end
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end
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# Invoke this here to apply the current value of fish_user_path after
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# PATH is possibly set above.
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__fish_reconstruct_path
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# Allow %n job expansion to be used with fg/bg/wait
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# `jobs` is the only one that natively supports job expansion
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function __fish_expand_pid_args
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for arg in $argv
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if string match -qr '^%\d+$' -- $arg
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if not jobs -p $arg
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return 1
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end
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else
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printf "%s\n" $arg
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end
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end
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end
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for jobbltn in bg fg wait disown
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function $jobbltn -V jobbltn
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builtin $jobbltn (__fish_expand_pid_args $argv)
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end
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end
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function kill
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command kill (__fish_expand_pid_args $argv)
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end
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# As last part of initialization, source the conf directories.
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# Implement precedence (User > Admin > Extra (e.g. vendors) > Fish) by basically doing "basename".
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set -l sourcelist
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for file in $__fish_config_dir/conf.d/*.fish $__fish_sysconf_dir/conf.d/*.fish $vendor_confdirs/*.fish
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set -l basename (string replace -r '^.*/' '' -- $file)
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contains -- $basename $sourcelist
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and continue
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set sourcelist $sourcelist $basename
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# Also skip non-files or unreadable files.
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# This allows one to use e.g. symlinks to /dev/null to "mask" something (like in systemd).
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[ -f $file -a -r $file ]
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and source $file
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end
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