破碎的bash提示包裝線

Question

我在OsX上定製了我的bash提示，包括git分支和分支狀態的一些標記。這打破了換行。

我知道I have to add \[ and \] to prevent this issue，但在函數中這樣做確實顯示\ [和\] litteraly。

我能做些什麼來逃避這些功能的序列？

免責聲明：這些是我第一次嘗試bash腳本。

function parse_git_dirty { 
    # TODO make git status response a variable 
    # [branch+] : working dir has staged changes 
    if [[ $(git status 2> /dev/null | grep "to be committed") ]] 
    then S=$S"$(tput setaf 2)+$(tput sgr0)" 
    fi 
    # [branch+] : working dir has unstaged changes 
    if [[ $(git status 2> /dev/null | grep "not staged for commit") ]] 
    then S=$S"$(tput setaf 1)+$(tput sgr0)" 
    fi 
    # [branch+] : working dir has untracked files 
    if [[ $(git status 2> /dev/null | grep "tracked files") ]] 
    then S=$S"$(tput setaf 1)+$(tput sgr0)" 
    fi 
    # [branch<] : local branch is behind origin 
    if [[ $(git status 2> /dev/null | grep "Your branch is behind") ]] 
    then S=$S"$(tput setaf 5)<$(tput sgr0)" 
    fi 
    # [branch>] : local branch is ahead origin 
    if [[ $(git status 2> /dev/null | grep "branch is ahead of") ]] 
    then S=$S"$(tput setaf 5)>$(tput sgr0)" 
    fi 
    # [branch<>] : branches have diverged 
    if [[ $(git status 2> /dev/null | grep "have diverged") ]] 
    then S=$S"$(tput setaf 5)<>$(tput sgr0)" 
    fi 
    echo $S 
} 
function parse_git_branch { 
    git branch --no-color 2> /dev/null | sed -e '/^[^*]/d' -e 's/* \(.*\)/\1/' 
} 
function show_git_branch { 
    if [[ $(parse_git_branch) ]] 
    then echo "$(tput setaf 2)($(tput sgr0)$(parse_git_branch)$(parse_git_dirty)$(tput setaf 2))$(tput sgr0)" 
    fi 
} 
export PS1="\u\[$(tput setaf 2)\]@\[$(tput sgr0)\]\h\[$(tput setaf 2)\]:\[$(tput sgr0)\]\W\[\$(show_git_branch)\] " 

Answer 1

我很高興聽到你已經解決了您的版本問題，但我想這可能是值得指出的是Git已經與分佈式一個有用的和仔細思考的bash函數，名爲__git_ps1，您可以在您的PS1中包含該函數。例如，你可以使用它像這樣：

export PS1='blah blah blah$(__git_ps1 " (%s)") ' 

如果你在一個Git倉庫是不是，$(__git_ps1 " (%s)")會變成空字符串。但是，如果你是，那麼將使用格式字符串。這通常會向您顯示您當前的分支，但是如果您處於合併或轉義的中間位置，將會顯示。

默認情況下，__git_ps1不會顯示樹是否髒或存在未跟蹤的文件，因爲在某些存儲庫中，這可能會讓您的bash提示出現過於緩慢。但是，如果您也想看到這些信息，那麼如果您將GIT_PS1_SHOWDIRTYSTATE或GIT_PS1_SHOWUNTRACKEDFILES設置爲非空，它會顯示它們。

你可以在git-completion.sh source file頂部找到更多的信息。

Answer 2

您在作業需要大約值單引號：

export PS1='\u\[$(tput setaf 2)\]@\[$(tput sgr0)\]\h\[$(tput setaf 2)\]:\[$(tput sgr0)\]\W\[$(show_git_branch)\] ' 

由於內容進行評估發出提示時，你沒有，你會在其他情況下需要雙引號。

Answer 3

感謝丹尼斯，更正後的代碼是：

function parse_git_dirty { 
    # TODO make git status response a variable 
    # [branch+] : working dir has staged changes 
    if [[ $(git status 2> /dev/null | grep "to be committed") ]] 
    then S=$S"$(tput setaf 2)+$(tput sgr0)" 
    fi 
    # [branch+] : working dir has unstaged changes 
    if [[ $(git status 2> /dev/null | grep "not staged for commit") ]] 
    then S=$S"$(tput setaf 1)+$(tput sgr0)" 
    fi 
    # [branch+] : working dir has untracked files 
    if [[ $(git status 2> /dev/null | grep "tracked files") ]] 
    then S=$S"$(tput setaf 1)+$(tput sgr0)" 
    fi 
    # [branch<] : local branch is behind origin 
    if [[ $(git status 2> /dev/null | grep "Your branch is behind") ]] 
    then S=$S"$(tput setaf 5)<$(tput sgr0)" 
    fi 
    # [branch>] : local branch is ahead origin 
    if [[ $(git status 2> /dev/null | grep "branch is ahead of") ]] 
    then S=$S"$(tput setaf 5)>$(tput sgr0)" 
    fi 
    # [branch<>] : branches have diverged 
    if [[ $(git status 2> /dev/null | grep "have diverged") ]] 
    then S=$S"$(tput setaf 5)<>$(tput sgr0)" 
    fi 
    echo $S 
} 
function parse_git_branch { 
    git branch --no-color 2> /dev/null | sed -e '/^[^*]/d' -e 's/* \(.*\)/\1/' 
} 
function show_git_branch { 
    if [[ $(parse_git_branch) ]] 
    then echo "$(tput setaf 2)($(tput sgr0)$(parse_git_branch)$(parse_git_dirty)$(tput setaf 2))$(tput sgr0)" 
    fi 
} 
export PS1='\u\[$(tput setaf 2)\]@\[$(tput sgr0)\]\h\[$(tput setaf 2)\]:\[$(tput sgr0)\]\W\[$(show_git_branch)\] '