如何將bash別名導入fish

Question

我在fish中缺少我的bash別名，並且不想手動將它們全部轉換為fish函數。 如何讓它們從 bash 到fish？

獎勵積分，如果：

• 該解決方案支持迭代過程，例如：我可以輕松更改 bash 中的別名，並將它們重新轉換/重新導入到 fish
• 該解決方案還導入了 bash 函數

Answer 1

將 bash 別名轉換為 bash 腳本

我決定這樣做而不是下面的方法，並將腳本放入~/bin/ ，它在我的PATH 。 這允許我從我當前正在執行的任何 shell 中使用它們，並且它可以防止引用的潛在問題。

像這樣使用：

# converts all bash aliases to script files
convert_bash_aliases_to_scripts

# removes all scripts previously converted by this script
convert_bash_aliases_to_scripts clean

bash 轉換腳本：

#!/bin/bash
# Convert bash aliases to bash scripts.
#
# Copyright 2018 <hoijui.quaero@gmail.com>, licensed under the GPL-3.0+
#
# Usage:
#   convert_bash_aliases_to_scripts          # converts all bash aliases to script files
#   convert_bash_aliases_to_scripts clean    # removes all scripts previously converted by this script

COLOR_RED=$'\e[0;31m'
COLOR_ORANGE=$'\e[0;33m'
COLOR_BLUE=$'\e[0;34m'
COLOR_BLUE_LIGHT=$'\e[1;34m'
COLOR_GREEN=$'\e[0;32m'
COLOR_BROWN=$'\e[0;33m'
COLOR_YELLOW=$'\e[1;33m'
COLOR_WHITE=$'\e[1;37m'
COLOR_CYAN=$'\e[0;36m'
COLOR_PURPLE=$'\e[0;35m'
COLOR_GRAY=$'\e[1;30m'
COLOR_GRAY_LIGHT=$'\e[0;37m'
COLOR_NONE=$'\e[m' # No Color

OUTPUT_DIR=~/bin/converted/aliases
LINKS_DIR=~/bin
README_FILE_NAME="README.md"
README_FILE="$OUTPUT_DIR/$README_FILE_NAME"

if [ "$1" = "clean" ]
then
    for script_file in $(find "$LINKS_DIR" -maxdepth 1 -type l)
    do
        conv_script_file="$OUTPUT_DIR/$(basename $script_file)"
        if [ -e $conv_script_file ] && [ "$(readlink --canonicalize $script_file)" = "$(realpath $conv_script_file)" ]
        then
            script_name=$(basename $script_file)
            echo "removing converted bash alias-script: $script_name"
            rm $conv_script_file \
                && rm $script_file
        fi
    done
    rm $README_FILE 2> /dev/null
    rmdir $OUTPUT_DIR 2> /dev/null
    exit 0
fi

SOURCE_FILES="${HOME}/.bashrc ${HOME}/.bash_aliases"
mkdir -p $OUTPUT_DIR
echo -e "# Bash alias conversion scripts\n\nsee $0\n\nWARNING: Do NOT manually edit files in this directory. instead, copy them to $LINKS_DIR (replacing the symbolic link that already exists there), and edit that new file.\nIf you edit the files in this dir, it will be replaced on the next (re)conversion from aliases." \
    > $README_FILE
AUTO_IMPORT_WARNING="# WARNING Do NOT edit this file by hand, as it was auto-generated from a bash alias, and may be overwritten in the future. please read ${README_FILE}"

function _is_link_to {
    local file_link=$1
    local file_target=$2
    test -e $file_target \
        && test "$(readlink --canonicalize $file_link)" = "$(realpath $file_target)"
    return $?
}

for source_file in $SOURCE_FILES
do
    IFS=$'\n'
    for a in $(cat $source_file | grep "^alias")
    do
        a_name="$(echo "$a" | sed -e 's/alias \([^=]*\)=.*/\1/')"
        a_command="$(echo "$a" | sed -e 's/alias \([^=]*\)=//' -e 's/[ \t]*#.*$//')"
        if echo "${a_command:0:1}" | grep -q -e "[\'\"]"
        then
            # unquote
            a_command_start=1
            let a_command_end="${#a_command} - 2"
        else
            # leave as is
            a_command_start=0
            let a_command_end="${#a_command}"
        fi
        script_file="$LINKS_DIR/$a_name"
        conv_script_file="$OUTPUT_DIR/$a_name"
        # Check whether the script already exists.
        # If so, we skip importing it, unless it is just a link to a previously imported script.
        log_action="none"
        log_action_color="${COLOR_NONE}"
        log_content=""
        if [ -e $script_file ] && ! $(_is_link_to $script_file $conv_script_file)
        then
            log_action="skipped (exists)"
            log_action_color="${COLOR_ORANGE}"
            log_content=""
        else
            if [ -e $script_file ]
            then
                log_action="reimporting"
                log_action_color="${COLOR_BLUE}"
            else
                log_action="importing"
                log_action_color="${COLOR_GREN}"
            fi

            # write the script file to a temporary location
            conv_script_file_tmp="${conv_script_file}_BAK"
            echo "#!/bin/bash" > $conv_script_file_tmp
            echo -e "$AUTO_IMPORT_WARNING" >> $conv_script_file_tmp
            echo -e "#\n# Imported bash alias '$a_name' from file '$source_file'" >> $conv_script_file_tmp
            cat >> "${conv_script_file_tmp}" <<EOF

${a_command:${a_command_start}:${a_command_end}} \${@}

EOF

            if diff -N ${conv_script_file_tmp} ${conv_script_file} > /dev/null
            then
                log_content="no change"
                log_content_color="${COLOR_NONE}"
            else
                log_content="changed"
                log_content_color="${COLOR_GREEN}"
            fi
            log_content=$(printf "%s %10s -> %s${COLOR_NONE}" "${log_content_color}" "${log_content}" "$a_command")

            mv "${conv_script_file_tmp}" "${conv_script_file}"

            # make the script executable
            chmod +x $conv_script_file
            # remove the link if it already exists (in case of reimport)
            rm $script_file 2> /dev/null
            # .. and re-create it as local symbolic link
            # to the function in the imports dir
            ln --symbolic --relative $conv_script_file $script_file
        fi
        printf "%s%20s: %-25s${COLOR_NONE}%s\n" "${log_action_color}" "${log_action}" "$a_name" "${log_content}"
    done
done

---

不推薦使用：創建執行 bash 代碼的魚包裝器

下面是一個為本地 bash 別名創建 fish 腳本包裝器的腳本：對於每個 bash 別名，它獲取內容，並創建一個 fish 別名/腳本來執行 bash 子 shell 中的代碼。 它不是最佳的，但對於我的大多數別名來說已經足夠了。

警告導入的函數可能與 bash 中的行為不同。 使用它們時，您可能會丟失數據或意外 DDOS 您的同事。

像這樣使用：

# imports (or reimports) all bash aliases into fish functions, permanently
import_bash_aliases

# removes all fish functions previously imported by this script
import_bash_aliases clean

將其保存在~/.config/fish/functions/import_bash_aliases.fish ：

#!/usr/bin/fish
# Fish function to import bash aliases
#
# Copyright 2018 <hoijui.quaero@gmail.com>, licensed under the GPL-3.0+
#
# This script is based on a script from Malte Biermann,
# see: https://glot.io/snippets/efh1c4aec0
#
# WARNING: There is no guarantee that the imported aliases work the same way
#   as they do in bash, so be cautious!
#
# Usage:
#   import_bash_aliases          # imports (or reimports) all bash aliases into fish functions, permanently
#   import_bash_aliases clean    # removes all fish functions previously imported by this script from bash aliases

function import_bash_aliases --description 'Converts bash aliases to .fish functions.\nThis might be called repeatedly, and will not override functions that are already defined in fish, except they are merely an older import from this script.'

    set -l FISH_FUNCTIONS_DIR ~/.config/fish/functions
    set -l BASH_IMPORTS_DIR_NAME bash-imports
    set -l BASH_IMPORTS_DIR $FISH_FUNCTIONS_DIR/$BASH_IMPORTS_DIR_NAME
    set -l README_FILE $BASH_IMPORTS_DIR/README.md

    if test "$argv[1]" = "clean"
        for fun_file in (find $FISH_FUNCTIONS_DIR -maxdepth 1 -name '*.fish')
            set -l imp_fun_file $BASH_IMPORTS_DIR/(basename $fun_file)
            if test -e $imp_fun_file ; and test (readlink --canonicalize $fun_file) = (realpath $imp_fun_file)
                set -l fun_name (basename $fun_file '.fish')
                echo "removing imported bash alias/function $fun_name"
                rm $imp_fun_file
                and rm $fun_file
                and functions --erase $fun_name
            end
        end
        rm $README_FILE ^ /dev/null
        rmdir $BASH_IMPORTS_DIR ^ /dev/null
        return 0
    end

    set -l SOURCE_FILES ~/.bashrc ~/.bash_aliases
    mkdir -p $BASH_IMPORTS_DIR
    echo -e "# Bash alias imports\n\nsee `$argv[0]`\n\nWARNING: Do NOT manually edit files in this directory. instead, copy them to $FISH_FUNCTIONS_DIR (replacing the symbolic link that already exists there), and edit that new file.\nIf you edit the files in this dir, it will be replaced on the next (re)import from bash aliases." \
        > $README_FILE
    set -l UNUSED_STUB_MSG "The bash alias corresponding to this function was NOT imported, because a corresponding function already exists at %s\n"
    set -l AUTO_IMPORT_WARNING "# WARNING Do NOT edit this file by hand, as it was auto-generated from a bash alias, and may be overwritten in the future. please read {$README_FILE}"

    function _fish_func_exists
        set -l fun_name $argv[1]
        # This also detects in-memory functions
        functions --query $fun_name
        # This also detects script files in the functions dir
        # that do not contain a function wiht the same name
        or test -e "$FISH_FUNCTIONS_DIR/$fun_name.fish"
        return $status
    end
    function _is_link_to
        set -l file_link $argv[1]
        set -l file_target $argv[2]
        test -e $file_target
        and test (readlink --canonicalize $file_link) = (realpath $file_target)
        return $status
    end

    for source_file in $SOURCE_FILES
        for a in (cat $source_file | grep "^alias")
            set -l a_name (echo $a | sed -e 's/alias \([^=]*\)=.*/\1/')
            set -l a_command (echo $a | sed -e 's/alias \([^=]*\)=//' -e 's/[ \t]*#[^\'\"]\+$//')
            set -l fun_file "$FISH_FUNCTIONS_DIR/$a_name.fish"
            set -l imp_fun_file "$BASH_IMPORTS_DIR/$a_name.fish"
            # Check whether the function already exists.
            # If so, we skip importing it, unless it is just a link to a previously imported function.
            if _fish_func_exists $a_name; and not _is_link_to $fun_file $imp_fun_file
                set_color red
                printf "%20s: %-25s\n" "skipping (exists)" $a_name
                set_color normal
                #printf $UNUSED_STUB_MSG $fun_file > $imp_fun_file
            else
                set_color green
                printf "%20s: %-25s -> %s\n" "(re-)importing" $a_name $a_command
                set_color normal
                # remove the link, in case of re-importing
                rm $fun_file ^ /dev/null

                # write the function file
                echo "#!/usr/bin/fish" > $imp_fun_file
                echo "\
$AUTO_IMPORT_WARNING

function $a_name -d 'bash alias "$a_name" import'
    bash -c $a_command' '\$argv''
end
" \
                    >> $imp_fun_file

                # make the script executable
                chmod +x $imp_fun_file
                # .. and re-create it as local symbolic link
                # to the function in the imports dir
                ln --symbolic --relative $imp_fun_file $fun_file
            end
        end
    end
    # (re-)load all the functions we just defined
    exec fish
end