从预提交挂钩中排除某些文件类型

Question

我想要一个预提交 git 钩子来检查（如果可能的话，自动删除）尾随空格。

在Make git automatically remove trailing whitespace before committing 中，我找到了一个link to a github page，其中实现了这样的钩子。这工作正常，但作为@VonC 该页面上的提及

由于该钩子获取每个文件的文件名，我建议 小心某些类型的文件：你不想删除 .md（降价）文件中的尾随空格！ – 冯克

再往下

我宁愿让钩子能够检测 .md 文件而不是删除 空格，而不是要求最终用户添加 --no-verify git commit 上的选项。 – 冯克

据我所知，没有提到解决方案。

由于我在项目中使用带有有意尾随空格的 .md 文件，这对我来说是个问题。
解决方案可能很简单，但我对编写脚本的语言没有经验（目前也对学习它不感兴趣）。

这是脚本（github的副本）：

#!/bin/bash
#

# A git hook script to find and fix trailing whitespace
# in your commits. Bypass it with the --no-verify option
# to git-commit
#
# usage: make a soft link to this file, e.g., ln -s ~/config/pre-commit.git.sh ~/some_project/.git/hooks/pre-commit

# detect platform
platform="win"
uname_result=`uname`
if [ "$uname_result" = "Linux" ]; then
  platform="linux"
elif [ "$uname_result" = "Darwin" ]; then
  platform="mac"
fi

# change IFS to ignore filename's space in |for|
IFS="
"
# autoremove trailing whitespace
for line in `git diff --check --cached | sed '/^[+-]/d'` ; do
  # get file name
  if [ "$platform" = "mac" ]; then
    file="`echo $line | sed -E 's/:[0-9]+: .*//'`"
  else
    file="`echo $line | sed -r 's/:[0-9]+: .*//'`"
  fi  
  # display tips
  echo -e "auto remove trailing whitespace in \033[31m$file\033[0m!"
  # since $file in working directory isn't always equal to $file in index, so we backup it
  mv -f "$file" "${file}.save"
  # discard changes in working directory
  git checkout -- "$file"
  # remove trailing whitespace
  if [ "$platform" = "win" ]; then
    # in windows, `sed -i` adds ready-only attribute to $file(I don't kown why), so we use temp file instead
    sed 's/[[:space:]]*$//' "$file" > "${file}.bak"
    mv -f "${file}.bak" "$file"
  elif [ "$platform" == "mac" ]; then
    sed -i "" 's/[[:space:]]*$//' "$file"
  else
    sed -i 's/[[:space:]]*$//' "$file"
  fi  
  git add "$file"
  # restore the $file
  sed 's/[[:space:]]*$//' "${file}.save" > "$file"
  rm "${file}.save"
done

if [ "x`git status -s | grep '^[A|D|M]'`" = "x" ]; then
  # empty commit
  echo
  echo -e "\033[31mNO CHANGES ADDED, ABORT COMMIT!\033[0m"
  exit 1
fi

# Now we can commit
exit

如何修改它以便（例如）在检查中排除 .md 文件？此外，如果可以排除多种文件类型，那就太好了。

Answer 1

试试这个：

#!/bin/bash
#

# A git hook script to find and fix trailing whitespace
# in your commits. Bypass it with the --no-verify option
# to git-commit
#
# usage: make a soft link to this file, e.g., ln -s ~/config/pre-commit.git.sh ~/some_project/.git/hooks/pre-commit

LIST="md txt c cpp"

lookup() {
    IFS=" "
    for i in $LIST
    do
    if [ "$i" = "$1" ]
    then
        return 1
        break
    fi
    done
    return 0
}

# detect platform
platform="win"
uname_result=`uname`
if [ "$uname_result" = "Linux" ]; then
    platform="linux"
elif [ "$uname_result" = "Darwin" ]; then
    platform="mac"
fi

# change IFS to ignore filename's space in |for|
IFS="
"
# autoremove trailing whitespace
for line in `git diff --check --cached | sed '/^[+-]/d'` ; do
    # get file name
    if [ "$platform" = "mac" ]; then
    file="`echo $line | sed -E 's/:[0-9]+: .*//'`"
    else
    file="`echo $line | sed -r 's/:[0-9]+: .*//'`"
    fi

    lookup $(echo "$file" | awk -F . '{print $NF}')
    if [ $? -eq 1 ]
    then
    echo Omitting "$file"
    continue
    fi

    # display tips
    echo -e "auto remove trailing whitespace in \033[31m$file\033[0m!"
    # since $file in working directory isn't always equal to $file in index, so we backup it
    mv -f "$file" "${file}.save"
    # discard changes in working directory
    git checkout -- "$file"
    # remove trailing whitespace
    if [ "$platform" = "win" ]; then
    # in windows, `sed -i` adds ready-only attribute to $file(I don't kown why), so we use temp file instead
    sed 's/[[:space:]]*$//' "$file" > "${file}.bak"
    mv -f "${file}.bak" "$file"
    elif [ "$platform" == "mac" ]; then
    sed -i "" 's/[[:space:]]*$//' "$file"
    else
    sed -i 's/[[:space:]]*$//' "$file"
    fi
    git add "$file"
    # restore the $file
    sed 's/[[:space:]]*$//' "${file}.save" > "$file"
    rm "${file}.save"
done

if [ "x`git status -s | grep '^[A|D|M]'`" = "x" ]; then
    # empty commit
    echo
    echo -e "\033[31mNO CHANGES ADDED, ABORT COMMIT!\033[0m"
    exit 1
fi

# Now we can commit
exit

应排除的文件扩展名列表位于脚本开头的LIST：

LIST="md txt c cpp"