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Forked from torsten/fix-whitespace.sh
Last active December 28, 2015 05:39
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#!/bin/sh
# Pre-commit hook for git which removes trailing whitespace, converts tabs to spaces, and enforces a max line length.
if git-rev-parse --verify HEAD >/dev/null 2>&1 ; then
against=HEAD
else
# Initial commit: diff against an empty tree object
against=4b825dc642cb6eb9a060e54bf8d69288fbee4904
fi
files_with_whitespace=`git diff-index --check --cached $against | # Find all changed files
sed '/^[+-]/d' | # Remove lines which start with + or -
sed -E 's/:[0-9]+:.*//' | # Remove end of lines which contains numbers, etc.
sed '/Generated/d' | # Ignore generated files
sed '/Libraries/d' | # Ignore libraries
sed '/\.[mh]\$/!d' | # Only process .m and .h files
uniq` # Remove duplicate files
# Change field separator to newline so that for correctly iterates over lines
IFS=$'\n'
# Find files with trailing whitespace
for FILE in $files_with_whitespace ; do
echo "Fixing whitespace in $FILE" >&2
# Replace tabs with four spaces
sed -i "" $'s/\t/ /g' "$FILE"
# Strip trailing whitespace
sed -i '' -E 's/[[:space:]]*$//' "$FILE"
git add "$FILE"
done
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