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brain/scripts/extract.sh
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#!/usr/bin/env bash
# Reverse sync: show diff between consumer-file and brain template, optionally apply
#
# Usage: extract.sh --source=<consumer-path> --file=<relative-path> [--dry-run]
set -euo pipefail
SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
source "$SCRIPT_DIR/lib/common.sh"
BRAIN_ROOT="${BRAIN_ROOT:-$(cd "$SCRIPT_DIR/.." && pwd)}"
source_dir=""
file=""
dry_run=0
while [ $# -gt 0 ]; do
case "$1" in
--source=*) source_dir="${1#--source=}" ;;
--file=*) file="${1#--file=}" ;;
--dry-run) dry_run=1 ;;
*) log_error "Unknown: $1"; exit 1 ;;
esac
shift
done
[ -n "$source_dir" ] || { log_error "--source required"; exit 1; }
[ -n "$file" ] || { log_error "--file required"; exit 1; }
consumer_file="$source_dir/$file"
[ -f "$consumer_file" ] || { log_error "Not found: $consumer_file"; exit 1; }
# Find brain template (try with and without .template suffix)
brain_file=""
if [ -f "$BRAIN_ROOT/project-files/$file.template" ]; then
brain_file="$BRAIN_ROOT/project-files/$file.template"
elif [ -f "$BRAIN_ROOT/project-files/$file" ]; then
brain_file="$BRAIN_ROOT/project-files/$file"
else
log_error "Brain template not found for: $file"
exit 1
fi
log_info "Comparing $consumer_file <-> $brain_file"
if diff -q "$brain_file" "$consumer_file" >/dev/null; then
log_info "Identical, no changes needed"
exit 0
fi
log_warn "Files differ:"
diff -u "$brain_file" "$consumer_file" || true
if [ "$dry_run" -eq 1 ]; then
exit 2
fi
# Interactive prompt
printf "Action [a]pply / [r]eject / [q]uit: " >&2
read -r action
case "$action" in
a|apply)
cp "$consumer_file" "$brain_file"
log_info "Applied. Don't forget to commit brain repo + bump version."
;;
r|reject)
log_info "Rejected. Brain template unchanged."
;;
*)
log_info "Quit. No changes."
;;
esac