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|
#!/usr/bin/env bash
#
# Perform basic style checks on a single Futhark compiler source code
# file. If a style violation is found, this script will exit with a
# nonzero exit code. Checks performed:
#
# 0) if Haskell: hlint (with some rules ignored).
#
# 1) Trailing whitespace.
#
# 2) A file ending in blank lines.
#
# 3) Tabs, anywhere.
#
# 4) DOS line endings (CRLF).
#
# 5) If Python: black and mypy.
#
# This script can be called on directories (in which case it applies
# to every file inside), or on files.
cyan=$(printf '%b' "\033[0;36m")
NC=$(printf '%b' "\033[0m")
if [ "$#" -ne 1 ]; then
echo "Usage: $0 <file>"
exit 1
fi
exit=0
hlint_check() {
# Some hlint-suggestions are terrible, so ignore them here.
hlint -XNoCPP -i "Use import/export shortcut" -i "Use const" -i "Use tuple-section" -i "Too strict maybe" -i "Functor law" "$1" -i "Avoid NonEmpty.unzip" -i "Parenthesize unary negation"
}
no_trailing_blank_lines() {
awk '/^$/ { sawblank=1; next } { sawblank=0 } END { if (sawblank==1) { exit 1 } }' "$1"
}
file="$1"
if grep -E -n " +$" "$file"; then
echo
echo "${cyan}Trailing whitespace in $file:${NC}"
echo "$output"
exit=1
fi
no_tabs() {
if grep -E -n "$(printf '\t')" "$1"; then
echo
echo "${cyan}Tab characters found in $1:${NC}"
echo "$output"
exit=1
fi
}
if file "$file" | grep -q 'CRLF line terminators'; then
echo
echo "${cyan}CRLF line terminators in $file.${NC}"
exit=1
fi
if ! no_trailing_blank_lines "$file"; then
echo
echo "${cyan}$file ends in several blank lines.${NC}"
exit=1
fi
case "$file" in
*.fut)
no_tabs "$file"
;;
*.hs)
no_tabs "$file"
if ! LC_ALL=C.UTF-8 ormolu --mode check "$file"; then
echo
echo "${cyan}$file:${NC} is not formatted correctly with Ormolu"
echo "$output"
exit=1
fi
output=$(hlint_check "$file")
if [ $? = 1 ]; then
echo
echo "${cyan}$file:${NC} hlint issues"
echo "$output"
exit=1
fi
;;
*.py)
no_tabs "$file"
output=$(mypy --no-error-summary "$file")
if [ $? != 0 ]; then
echo
echo "${cyan}$file:${NC} Mypy is upset"
echo "$output"
exit=1
fi
output=$(black --check --diff --quiet "$file")
if [ $? != 0 ]; then
echo
echo "${cyan}$file:${NC} is not formatted correctly with Black"
echo "$output"
exit=1
fi
;;
esac
exit $exit
|
