function getScriptAbsoluteDir { # fold>>
    # @description used to get the script path
    # @param $1 the script $0 parameter
    local script_invoke_path="$1"
    local cwd=`pwd`

    # absolute path ? if so, the first character is a /
    if test "x${script_invoke_path:0:1}" = 'x/'
    then
        RESULT=`dirname "$script_invoke_path"`
    else
        RESULT=`dirname "$cwd/$script_invoke_path"`
    fi
} # <<fold

这是我唯一能以可靠的方式说的话:

SCRIPT_DIR=$(dirname $(cd "$(dirname "$BASH_SOURCE")"; pwd))

#!/usr/bin/env bash

SCRIPT_DIR=$( cd -- "$( dirname -- "${BASH_SOURCE[0]}" )" &> /dev/null && pwd )

这是一个有用的单行,这将为您提供脚本的完整目录名称,无论它从哪里被召唤。

它将工作,只要找到脚本的路径的最后一个组成部分不是一个simlink(指南链接是OK)。如果你也想解决任何链接到脚本本身,你需要一个多线解决方案:

#!/usr/bin/env bash

SOURCE=${BASH_SOURCE[0]}
while [ -L "$SOURCE" ]; do # resolve $SOURCE until the file is no longer a symlink
  DIR=$( cd -P "$( dirname "$SOURCE" )" >/dev/null 2>&1 && pwd )
  SOURCE=$(readlink "$SOURCE")
  [[ $SOURCE != /* ]] && SOURCE=$DIR/$SOURCE # if $SOURCE was a relative symlink, we need to resolve it relative to the path where the symlink file was located
done
DIR=$( cd -P "$( dirname "$SOURCE" )" >/dev/null 2>&1 && pwd )

最后一个将与任何结合的联盟,来源,bash -c,simlinks等工作。

注意:如果您在运行此剪辑之前将CD转到另一个目录,结果可能是错误的!

此外,请注意 $CDPATH gotchas 和 stderr 输出副作用,如果用户有明智的 overridden cd 将输出转向 stderr 而不是 (包括逃避序列,如在 Mac 上呼叫 update_terminal_cwd >&2 ) 添加 >/dev/null 2>&1 在您的 cd 命令结束时,将考虑到两种可能性。

要了解它是如何工作的,试着运行这个更垂直的形式:

#!/usr/bin/env bash

SOURCE=${BASH_SOURCE[0]}
while [ -L "$SOURCE" ]; do # resolve $SOURCE until the file is no longer a symlink
  TARGET=$(readlink "$SOURCE")
  if [[ $TARGET == /* ]]; then
    echo "SOURCE '$SOURCE' is an absolute symlink to '$TARGET'"
    SOURCE=$TARGET
  else
    DIR=$( dirname "$SOURCE" )
    echo "SOURCE '$SOURCE' is a relative symlink to '$TARGET' (relative to '$DIR')"
    SOURCE=$DIR/$TARGET # if $SOURCE was a relative symlink, we need to resolve it relative to the path where the symlink file was located
  fi
done
echo "SOURCE is '$SOURCE'"
RDIR=$( dirname "$SOURCE" )
DIR=$( cd -P "$( dirname "$SOURCE" )" >/dev/null 2>&1 && pwd )
if [ "$DIR" != "$RDIR" ]; then
  echo "DIR '$RDIR' resolves to '$DIR'"
fi
echo "DIR is '$DIR'"

它将打印一些类似:

SOURCE './scriptdir.sh' is a relative symlink to 'sym2/scriptdir.sh' (relative to '.')
SOURCE is './sym2/scriptdir.sh'
DIR './sym2' resolves to '/home/ubuntu/dotfiles/fo fo/real/real1/real2'
DIR is '/home/ubuntu/dotfiles/fo fo/real/real1/real2'

使用阅读链接的组合来编码名称(如果是同链接,则将其返回来源的奖金)并提取目录名称:

script="`readlink -f "${BASH_SOURCE[0]}"`"
dir="`dirname "$script"`"

此单行在 Cygwin 上工作,即使脚本已被从 Windows 称为 bash -c <script>:

set mydir="$(cygpath "$(dirname "$0")")"

对于具有 GNU coreutils readlink 的系统(例如,Linux):

$(readlink -f "$(dirname "$0")")

您不需要使用 BASH_SOURCE 当 $0 包含脚本文件名时。