fish-shell/share/functions/__fish_config_interactive.fish

#
# Initializations that should only be performed when entering interactive mode.
#
# This function is called by the __fish_on_interactive function, which is defined in config.fish.
#
function __fish_config_interactive -d "Initializations that should be performed when entering interactive mode"
    # Make sure this function is only run once.
    if set -q __fish_config_interactive_done
        return
    end

    set -g __fish_config_interactive_done

    # Set the correct configuration directory
    set -l configdir ~/.config
    if set -q XDG_CONFIG_HOME
        set configdir $XDG_CONFIG_HOME
    end
    # Set the correct user data directory
    set -l userdatadir ~/.local/share
    if set -q XDG_DATA_HOME
        set userdatadir $XDG_DATA_HOME
    end

    #
    # If we are starting up for the first time, set various defaults
    #
    if not set -q __fish_init_1_50_0
        if not set -q fish_greeting
            set -l line1 (printf (_ 'Welcome to fish, the friendly interactive shell') )
            set -l line2 (printf (_ 'Type %shelp%s for instructions on how to use fish') (set_color green) (set_color normal))
            set -U fish_greeting $line1\n$line2
        end
        set -U __fish_init_1_50_0

        # Regular syntax highlighting colors
        set -q fish_color_normal
        or set -U fish_color_normal normal
        set -q fish_color_command
        or set -U fish_color_command 005fd7 purple
        set -q fish_color_param
        or set -U fish_color_param 00afff cyan
        set -q fish_color_redirection
        or set -U fish_color_redirection normal
        set -q fish_color_comment
        or set -U fish_color_comment red
        set -q fish_color_error
        or set -U fish_color_error red --bold
        set -q fish_color_escape
        or set -U fish_color_escape cyan
        set -q fish_color_operator
        or set -U fish_color_operator cyan
        set -q fish_color_end
        or set -U fish_color_end green
        set -q fish_color_quote
        or set -U fish_color_quote brown
        set -q fish_color_autosuggestion
        or set -U fish_color_autosuggestion 555 yellow
        set -q fish_color_user
        or set -U fish_color_user green

        set -q fish_color_host
        or set -U fish_color_host normal
        set -q fish_color_valid_path
        or set -U fish_color_valid_path --underline

        set -q fish_color_cwd
        or set -U fish_color_cwd green
        set -q fish_color_cwd_root
        or set -U fish_color_cwd_root red

        # Background color for matching quotes and parenthesis
        set -q fish_color_match
        or set -U fish_color_match cyan

        # Background color for search matches
        set -q fish_color_search_match
        or set -U fish_color_search_match --background=purple

        # Background color for selections
        set -q fish_color_selection
        or set -U fish_color_selection --background=purple

        # Pager colors
        set -q fish_pager_color_prefix
        or set -U fish_pager_color_prefix cyan
        set -q fish_pager_color_completion
        or set -U fish_pager_color_completion normal
        set -q fish_pager_color_description 555
        or set -U fish_pager_color_description 555 yellow
        set -q fish_pager_color_progress
        or set -U fish_pager_color_progress cyan

        #
        # Directory history colors
        #
        set -q fish_color_history_current
        or set -U fish_color_history_current cyan
    end

    #
    # Generate man page completions if not present.
    #
    if not test -d $userdatadir/fish/generated_completions
        #fish_update_completions is a function, so it can not be directly run in background.
        eval "$__fish_bin_dir/fish -c 'fish_update_completions > /dev/null ^/dev/null' &"
    end

    #
    # Print a greeting.
    # fish_greeting can be a function (preferred) or a variable.
    #
    if functions -q fish_greeting
        fish_greeting
    else
        # The greeting used to be skipped when fish_greeting was empty (not just undefined)
        # Keep it that way to not print superfluous newlines on old configuration
        test -n "$fish_greeting"
        and echo $fish_greeting
    end

    #
    # This event handler makes sure the prompt is repainted when
    # fish_color_cwd changes value. Like all event handlers, it can't be
    # autoloaded.
    #
    function __fish_repaint --on-variable fish_color_cwd --description "Event handler, repaints the prompt when fish_color_cwd changes"
        if status --is-interactive
            set -e __fish_prompt_cwd
            commandline -f repaint ^/dev/null
        end
    end

    function __fish_repaint_root --on-variable fish_color_cwd_root --description "Event handler, repaints the prompt when fish_color_cwd_root changes"
        if status --is-interactive
            set -e __fish_prompt_cwd
            commandline -f repaint ^/dev/null
        end
    end

    #
    # Completions for SysV startup scripts. These aren't bound to any
    # specific command, so they can't be autoloaded.
    #
    complete -x -p "/etc/init.d/*" -a start --description 'Start service'
    complete -x -p "/etc/init.d/*" -a stop --description 'Stop service'
    complete -x -p "/etc/init.d/*" -a status --description 'Print service status'
    complete -x -p "/etc/init.d/*" -a restart --description 'Stop and then start service'
    complete -x -p "/etc/init.d/*" -a reload --description 'Reload service configuration'

    # Make sure some key bindings are set
    if not set -q fish_key_bindings
        set -U fish_key_bindings fish_default_key_bindings
    end

    # Reload key bindings when binding variable change
    function __fish_reload_key_bindings -d "Reload key bindings when binding variable change" --on-variable fish_key_bindings
        # do nothing if the key bindings didn't actually change
        # This could be because the variable was set to the existing value
        # or because it was a local variable
        # If fish_key_bindings is empty on the first run, we still need to set the defaults
        if test "$fish_key_bindings" = "$__fish_active_key_bindings" -a -n "$fish_key_bindings"
            return
        end
        # Check if fish_key_bindings is a valid function
        # If not, either keep the previous bindings (if any) or revert to default
        # Also print an error so the user knows
        if not functions -q "$fish_key_bindings"
            echo "There is no fish_key_bindings function called: '$fish_key_bindings'" >&2
            if set -q __fish_active_key_bindings
                echo "Keeping $__fish_active_key_bindings" >&2
                return 1
            else
                echo "Reverting to default bindings" >&2
                set fish_key_bindings fish_default_key_bindings
                # Return because we are called again
                return 0
            end
        end
        set -g __fish_active_key_bindings "$fish_key_bindings"
        set -g fish_bind_mode default
        if test "$fish_key_bindings" = fish_default_key_bindings
            # Redirect stderr per #1155
            fish_default_key_bindings ^/dev/null
        else
            eval $fish_key_bindings ^/dev/null
        end
        # Load user key bindings if they are defined
        if functions --query fish_user_key_bindings >/dev/null
            fish_user_key_bindings ^/dev/null
        end
    end

    # Load key bindings
    __fish_reload_key_bindings

    # Repaint screen when window changes size
    function __fish_winch_handler --on-signal WINCH
        commandline -f repaint
    end


    # Notify vte-based terminals when $PWD changes (issue #906)
    if test "$VTE_VERSION" -ge 3405 -o "$TERM_PROGRAM" = "Apple_Terminal"
        function __update_vte_cwd --on-variable PWD --description 'Notify VTE of change to $PWD'
            status --is-command-substitution
            and return
            printf '\033]7;file://%s%s\a' (hostname) (pwd | __fish_urlencode)
        end
        __update_vte_cwd # Run once because we might have already inherited a PWD from an old tab
    end

    ### Command-not-found handlers
    # This can be overridden by defining a new __fish_command_not_found_handler function
    if not type -q __fish_command_not_found_handler
        # First check if we are on OpenSUSE since SUSE's handler has no options
        # and expects first argument to be a command and second database
        # also check if there is command-not-found command.
        if test -f /etc/SuSE-release
            and type -q -p command-not-found
            function __fish_command_not_found_handler --on-event fish_command_not_found
                /usr/bin/command-not-found $argv[1]
            end
            # Check for Fedora's handler
        else if test -f /usr/libexec/pk-command-not-found
            function __fish_command_not_found_handler --on-event fish_command_not_found
                /usr/libexec/pk-command-not-found $argv[1]
            end
            # Check in /usr/lib, this is where modern Ubuntus place this command
        else if test -f /usr/lib/command-not-found
            function __fish_command_not_found_handler --on-event fish_command_not_found
                /usr/lib/command-not-found -- $argv[1]
            end
            # Check for NixOS handler
        else if test -f /run/current-system/sw/bin/command-not-found
            function __fish_command_not_found_handler --on-event fish_command_not_found
                /run/current-system/sw/bin/command-not-found $argv
            end
            # Ubuntu Feisty places this command in the regular path instead
        else if type -q -p command-not-found
            function __fish_command_not_found_handler --on-event fish_command_not_found
                command-not-found -- $argv[1]
            end
            # pkgfile is an optional, but official, package on Arch Linux
            # it ships with example handlers for bash and zsh, so we'll follow that format
        else if type -p -q pkgfile
            function __fish_command_not_found_handler --on-event fish_command_not_found
                set -l __packages (pkgfile --binaries --verbose -- $argv[1] ^/dev/null)
                if test $status -eq 0
                    printf "%s may be found in the following packages:\n" "$argv[1]"
                    printf "  %s\n" $__packages
                else
                    __fish_default_command_not_found_handler $argv[1]
                end
            end
            # Use standard fish command not found handler otherwise
        else
            function __fish_command_not_found_handler --on-event fish_command_not_found
                __fish_default_command_not_found_handler $argv[1]
            end
        end
    end

    if test $TERM = "linux" # A linux in-kernel VT with 8 colors and 256/512 glyphs
        # In a VT we have
        # black (invisible)
        # red
        # green
        # yellow
        # blue
        # magenta
        # cyan
        # white

        # Pretty much just set at random
        set -g fish_color_normal normal
        set -g fish_color_command yellow
        set -g fish_color_param cyan
        set -g fish_color_redirection normal
        set -g fish_color_comment red
        set -g fish_color_error red
        set -g fish_color_escape cyan
        set -g fish_color_operator cyan
        set -g fish_color_quote blue
        set -g fish_color_autosuggestion yellow
        set -g fish_color_valid_path
        set -g fish_color_cwd green
        set -g fish_color_cwd_root red
        set -g fish_color_match cyan
        set -g fish_color_history_current cyan
        set -g fish_color_search_match cyan
        set -g fish_color_selection blue
        set -g fish_color_end yellow
        set -g fish_color_host normal
        set -g fish_color_status red
        set -g fish_color_user green
        set -g fish_pager_color_prefix cyan
        set -g fish_pager_color_completion normal
        set -g fish_pager_color_description yellow
        set -g fish_pager_color_progress cyan

        # Don't allow setting color other than what linux offers (see #2001)
        functions -e set_color
        function set_color --shadow-builtin
            set -l term_colors black red green yellow blue magenta cyan white normal
            for a in $argv
                if not contains -- $a $term_colors
                    switch $a
                        # Also allow options
                        case "-*"
                            continue
                        case "*"
                            echo "Color not valid in TERM = linux: $a"
                            return 1
                    end
                end
            end
            builtin set_color $argv
            return $status
        end

        # Set fish_prompt to a VT-friendly version
        # without color or unicode
        function fish_prompt
            fish_fallback_prompt
        end
    end
end