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Shell MiniConfig

3 min read

本文旨在构造一个方便迁移的 Shell 最小配置，不使用插件，也不使用某些特殊 shell 自带的强大功能。

虽然不想承认，但是用到的主要技术是 ANSI Color 。

Shell Prompt

这个 Prompt 主要有以下亮点：

  • 具有路径，时间，用户名，主机名信息，方便 log
  • 三行提示符，让信息不再杂乱
  • Git Branch 和 Status 集成
#${VALUE} 是展开字符串，$(FUNC) 是捕获 FUNC 的输出
PURPLE="\e[1;35m"
YELLOW="\e[1;33m"
GREEN="\e[1;32m"
BLUE="\e[1;34m"
RED="\e[1;31m"
WHITE="\e[1;37m"
RESET="\e[0m"
 
git_branch() {
branch="`git branch 2>/dev/null | grep "^\*" | sed -e "s/^\*\ //"`"
if [ "${branch}" != "" ];then
    if [ "${branch}" = "(no branch)" ];then
        branch="`git rev-parse --short HEAD`..."
    fi
    echo "$branch"
fi
}
 
git_status() {
  if git rev-parse --is-inside-work-tree > /dev/null 2>&1; then
    local untracked=0
    local modified=0
    local modified_updated=0
    local new_added=0
    local deleted=0
    local deleted_updated=0
    local renamed_updated=0
 
    local status_items=$(git status --porcelain)
    if [ -n "$status_items" ]; then
      while IFS= read -r item; do
        case "${item:0:2}" in
          "??") ((untracked++));;
          "MM") ((modified++)); ((modified_updated++));;
          " M") ((modified++));;
          "M ") ((modified_updated++));;
          "A ") ((new_added++));;
          " D") ((deleted++));;
          "D ") ((deleted_updated++));;
          "R ") ((renamed_updated++));;
        esac
      done <<< "$status_items"
 
      local result=""
      local index=""
      local workdir=""
 
      if [ "$modified" -ne 0 ]; then
        workdir+="${modified}${BLUE}*${RESET}"
      fi
      if [ "$modified_updated" -ne 0 ]; then
        index+="${modified_updated}${BLUE}*${RESET}"
      fi
 
      if [ "$deleted" -ne 0 ]; then
        workdir+="${deleted}${RED}x${RESET}"
      fi
      if [ "$deleted_updated" -ne 0 ]; then
        index+="${deleted_updated}${RED}x${RESET}"
      fi
      if [ "$renamed_updated" -ne 0 ]; then
        index+="${renamed_updated}${YELLOW}!${RESET}"
      fi
      if [ "$untracked" -ne 0 ]; then
        workdir+="${untracked}${YELLOW}?${RESET}"
      fi
      if [ "$new_added" -ne 0 ]; then
        index+="${new_added}${PURPLE}+${RESET}"
      fi
 
      if [ -z "$index" ]; then
        index="${WHITE}Ծ${RESET}"
      fi
      if [ -z "$workdir" ]; then
        index="${WHITE}Ծ${RESET}"
      fi
 
      result="${index}${workdir}"
 
      echo "$result"
    else
      echo "${WHITE}ԾᴗԾ${RESET}"
    fi
  else
    echo ""
  fi
}
 
GIT_STATUS=$(git_status)
 
thy_prompt() {
    # 必须先将它记下来，不然会被掩盖
    exitstatus=$?
    result="${GREEN}┌─[${RESET}\u@\h${GREEN}]─[${RESET}\t${GREEN}]\n"
    result+="├─[${WHITE}\w${GREEN}]"
 
    last_command=$(history 1 | awk '{print$2}')
 
    if [ -n "$(git_branch)" ]; then
        result+="${GREEN}─[${RESET}$(git_branch)${GREEN}]"
    fi
 
 
    if [[$last_command == git* ||$last_command == cd* ]]; then
        GIT_STATUS=$(git_status)
    fi
 
    if [ -n "$GIT_STATUS" ]; then
        result+="${GREEN}─[${RESET}$GIT_STATUS${GREEN}]"
    fi
 
    result+="${GREEN}\n└─>${RESET}"
    if [[$exitstatus == 0 ]]; then
        result+="${YELLOW}λ${RESET} "
    else
        result+="${RED}λ${RESET} "
    fi
 
    PS1="$result"
    # echo "$result"
}
# PROMPT_COMMAND 用于每次更新 PS
PROMPT_COMMAND=thy_prompt

Colorful Commands

主要利用了 --color=auto 这个选项

alias ls="ls --color=auto"
alias ll="ls --color=auto -al"
alias grep="grep --color=auto"

Alias

记录方便的 alias

alias time="/usr/bin/time"
 
# git
alias ga="git add ."
alias gc="git commit -m"
alias gp="git push"
alias gcl="git clone"
alias gl="git log --graph --pretty=oneline"
 
# tar
alias targz="tar -zcvf"
alias tarlgz="tar -ztvf"
alias tarugz="tar -zxvf"

Colorful Man

使 man page 变成彩色，实际上只使用到了 bold, underline 。

# colourful man page
# mb: start blink
# md: start blod
# me: turn off bold, blink and underline
# us: start underline
# ue: stop underline
# so: start standout
# se: stop standout
# just use bold and underline
export MANROFFOPT=-c
export LESS_TERMCAP_mb=$'\E[01;31m'
export LESS_TERMCAP_md=$'\E[01;34m'
export LESS_TERMCAP_me=$'\E[0m'
export LESS_TERMCAP_so=$'\E[01;33;44m'
export LESS_TERMCAP_se=$'\E[0m'
export LESS_TERMCAP_us=$'\E[04;32m'
export LESS_TERMCAP_ue=$'\E[0m'

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