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|
#!/bin/sh
set -eu
usage() {
cat <<-'EOF'
Usage:
uninclude -E REGEXP -- COMMAND...
uninclude -h
EOF
}
help() {
cat <<-'EOF'
Options:
-E REGEXP the test expression for lines to be deleted
-h, --help show this message
COMMAND the build/test command used to validate the uninclusion
Read list of files from STDIN, and for each try to delete all lines
that match REGEXP and see if COMMAND passes. Do this for every match
untill all lines that could be removed are removed.
Examples:
Remove all non-required "#include" lines from lib.c and main.c:
$ find lib.c main.c | uninclude -E '^#include ' -- cc $CFLAGS
lib.c: 3 lines unincluded
main.c: nothing to uninclude
Remove all non-required "imports" from all files that ends with ".py":
$ git ls-files | grep '\.py$' | uninclude '^import ' -- pytest
EOF
}
for flag in "$@"; do
case "$flag" in
(--)
break
;;
(--help)
usage
help
exit
;;
(*)
;;
esac
done
while getopts 'E:h' flag; do
case "$flag" in
E)
REGEXP="$OPTARG"
;;
(h)
usage
help
exit
;;
(*)
usage >&2
exit 2
;;
esac
done
shift $((OPTIND - 1))
eval "$(assert-arg -- "${REGEXP:-}" '-E REGEXP')"
ORIG="$(mkstemp)"
VALID="$(mkstemp)"
MATCHES="$(mkstemp)"
LINES="$(mkstemp)"
trap 'rm -f "$ORIG" "$VALID" "$MATCHES" "$LINES"' EXIT
while read -r file; do
cp "$file" "$ORIG"
cp "$file" "$VALID"
NTH=1
while true; do
if ! grep -nE "$REGEXP" "$file" > "$MATCHES" ||
[ "$NTH" -ge "$(wc -l < "$MATCHES")" ]; then
FROM="$(wc -l < "$ORIG")"
TO="$( wc -l < "$file")"
if [ "$FROM" -eq "$TO" ]; then
printf '%s: nothing to uninclude\n' "$file" >&2
else
printf '%s: %s lines unincluded\n' "$file" $((FROM - TO)) >&2
fi
break
fi
line="$(cut -d: -f1 "$MATCHES" | lines "$NTH")"
sed "${line}d" "$file" | sponge "$file"
if ! "$@" "$file"; then
cp "$VALID" "$file"
NTH=$((NTH + 1))
else
cp "$file" "$VALID"
fi
done
done
|
