将shell脚本中的./替换为$PWD。

huangapple
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英文:

Replace ./ with $PWD in shell script

问题

I have string that may or may not start from ./, or may be just a ./
In that case I want to replace it with $PWD

Any help?

  1. APP_FOLDER=./service
  2. MODIFIED_APP_FOLDER= = $([[ $APP_FOLDER= './'* ]] && echo "${APP_FOLDER/'./'/"$PWD"}" || echo "$PWD/$APP_FOLDER")

Causes "Wrong substitution".

英文:

I have string that may or may not start from ./, or may be just a ./
In that case I want to replace it with $PWD

Any help?

  1. APP_FOLDER=./service
  2. MODIFIED_APP_FOLDER= = $([[ $APP_FOLDER= './'* ]] && echo "${APP_FOLDER/'./'/"$PWD"}" || echo "$PWD/$APP_FOLDER")
  3.

Causes "Wrong substitution"

答案1

得分: 2

不需要在Bash中使用子shell扩展：

  1. #!/usr/bin/env bash
  3. printf '%-10s %s\n' 'app_folder' 'modified_app_folder'
  4. for app_folder in ./service foobar ./ /tmp/test; do
  5.     modified_app_folder=${app_folder/#.\//$PWD/}
  6.     printf '%-10s %s\n' "$app_folder" "$modified_app_folder"
  7. done

示例输出：

  1. app_folder modified_app_folder
  2. ./service  /home/lea/StackOverflow/service
  3. foobar     foobar
  4. ./         /home/lea/StackOverflow/
  5. /tmp/test  /tmp/test
英文:

It is not needed to use sub-shell expansion here with Bash:

  1. #!/usr/bin/env bash
  3. printf '%-10s %s\n' 'app_folder' 'modified_app_folder'
  4. for app_folder in ./service foobar ./ /tmp/test; do
  5.     modified_app_folder=${app_folder/#.\//$PWD/}
  6.     printf '%-10s %s\n' "$app_folder" "$modified_app_folder"
  7. done

Sample output:

  1. app_folder modified_app_folder
  2. ./service  /home/lea/StackOverflow/service
  3. foobar     foobar
  4. ./         /home/lea/StackOverflow/
  5. /tmp/test  /tmp/test

答案2

得分: 1

这样：

始终在寻求人类帮助之前，通过 https://shelcheck.net 检查你的脚本。或者使用命令行：

  1. $ shellcheck file
  2. 在文件的第2行:
  3. MODIFIED_APP_FOLDER= = $([[ $APP_FOLDER= './'* ]] && echo "${APP_FOLDER/'./'/"$PWD"}" || echo "$PWD/$APP_FOLDER")
  4.                         ^-- SC1007 (警告): 如果尝试分配一个值，请删除等号后的空格（对于空字符串，请使用 var='' ... ）。
  5.                            ^-- SC1009 (信息): 上述语法错误在此命令扩展中。
  6.                              ^-- SC1073 (错误): 无法解析此测试表达式。修复以允许更多检查。
  7.                                            ^-- SC1108 (错误): 等号前后需要有空格。
  8.                                               ^-- SC1072 (错误): 期望比较运算符（不要在[]/ [[]]中包装命令）。修复任何提到的问题，然后重试。
  10. 有关更多信息：
  11.   https://www.shellcheck.net/wiki/SC1108 -- 在等号前后需要有空格...
  12.   https://www.shellcheck.net/wiki/SC1007 -- 如果尝试...
  13.   https://www.shellcheck.net/wiki/SC1072 -- 期望比较运算符（不...
  15. </br>
  17. 更正后的代码：
  19. ```bash
  20. $ cat file
  21. APP_FOLDER=./service
  22. MODIFIED_APP_FOLDER=$([[ $APP_FOLDER == './'* ]] && echo "${APP_FOLDER/.\//"$PWD/"}" || echo "$PWD/$APP_FOLDER")
  23. echo "$MODIFIED_APP_FOLDER"
  25. $ bash file
  26. /tmp/service
英文:

Like this:

Always pass your script to https://shelcheck.net before asking human help. Or use the command line:

  1. $ shellcheck file
  2. In file line 2:
  3. MODIFIED_APP_FOLDER= = $([[ $APP_FOLDER= './'* ]] && echo "${APP_FOLDER/'./'/"$PWD"}" || echo "$PWD/$APP_FOLDER")
  4.                     ^-- SC1007 (warning): Remove space after = if trying to assign a value (for empty string, use var='' ... ).
  5.                        ^-- SC1009 (info): The mentioned syntax error was in this command expansion.
  6.                          ^-- SC1073 (error): Couldn't parse this test expression. Fix to allow more checks.
  7.                                        ^-- SC1108 (error): You need a space before and after the = .
  8.                                           ^-- SC1072 (error): Expected comparison operator (don't wrap commands in []/[[]]). Fix any mentioned problems and try again.
  10. For more information:
  11.   https://www.shellcheck.net/wiki/SC1108 -- You need a space before and after...
  12.   https://www.shellcheck.net/wiki/SC1007 -- Remove space after = if trying to...
  13.   https://www.shellcheck.net/wiki/SC1072 -- Expected comparison operator (don...

</br>

Corrected code:

  1. $ cat file
  2. APP_FOLDER=./service
  3. MODIFIED_APP_FOLDER=$([[ $APP_FOLDER == &#39;./&#39;* ]] &amp;&amp; echo &quot;${APP_FOLDER/.\//&quot;$PWD/&quot;}&quot; || echo &quot;$PWD/$APP_FOLDER&quot;)
  4. echo &quot;$MODIFIED_APP_FOLDER&quot;
  6. $ bash file
  7. /tmp/service

huangapple
  • 本文由 发表于 2023年2月23日 19:31:19
  • 转载请务必保留本文链接：https://go.coder-hub.com/75544233.html
  • bash
  • shell
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