34 lines
958 B
Bash
34 lines
958 B
Bash
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#!/usr/bin/env bash
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set -eof pipefail
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FILES=$(comm -23 <(sort <(git ls-files --cached --others --exclude-standard)) <(sort <(git ls-files --deleted)) | grep --ignore-case -E '\.(java|cpp|nix|json|sh|md|js|clj|cljs|cljc|edn)$')
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N_FILES=$(echo "$FILES" | wc -l)
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LINT_SHOULD_FIX=0
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if [[ -n $1 && $1 != '--fix' ]]; then
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echo "Unknown option '$1'" >&2
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exit 1
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elif [[ $1 == '--fix' ]]; then
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LINT_SHOULD_FIX=1
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fi
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echo "Checking ${N_FILES} files for missing trailing newlines."
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# Do not process the whole file and only check the last character. Ignore empty
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# files. Taken from https://stackoverflow.com/a/10082466.
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for file in $FILES; do
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if [ -s "$file" ] && [ "$(tail -c1 "$file"; echo x)" != $'\nx' ]; then
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if [[ $LINT_SHOULD_FIX -eq 1 ]]; then
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echo "" >>"$file"
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else
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LINT_ERROR=1
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echo "No trailing newline: $file" >&2
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fi
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fi
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done
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if [[ $LINT_ERROR -eq 1 ]]; then
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exit 1
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fi
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