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Add hook for prettier #5

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Add hook for prettier #5

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39 changes: 39 additions & 0 deletions pre-commit.d/prettier.sh
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Original file line number Diff line number Diff line change
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#!/bin/bash

# Run prettier on the files in the diff.
#
# Tests if prettier exists

formatter=${PRETTIER_BIN:-./node_modules/.bin/prettier}

if [ ! -f "$formatter" ]; then
exit 0
fi

STAGED_FILES=$(git diff --cached --name-only --diff-filter=ACM -- '*.js' '*.scss' | sed 's| |\\ |g')

CHANGED_UNSTAGED_FILES=$(git diff --name-only)

if [ ! -z "$STAGED_FILES" ]; then
if [ ! -z "$CHANGED_UNSTAGED_FILES" ]; then
# if there's changed stuff that isn't staged, we dont want to format the unstaged stuff too
git stash --keep-index
fi

# Format all selected files
echo "$STAGED_FILES" | xargs "$formatter" --write

# Check for the exit code
if [ $? -ne 0 ]; then
exit 1
fi

# Add back the modified/prettified files to staging
echo "$STAGED_FILES" | xargs git add -u


if [ ! -z "$CHANGED_UNSTAGED_FILES" ]; then
# put everything back in its place, hopefully without any merge conflicts...
git stash pop
fi
fi