93 lines
2.3 KiB
Bash
93 lines
2.3 KiB
Bash
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#!/usr/bin/env bash
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#
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# Bisect parsing a file at various line cut-off points to see which line causes the parse to differ from emacs.
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set -euo pipefail
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IFS=$'\n\t'
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DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
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REALPATH=$(command -v uu-realpath || command -v realpath)
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############## Setup #########################
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function cleanup {
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for f in "${folders[@]}"; do
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log "Deleting $f"
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rm -rf "$f"
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done
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}
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folders=()
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for sig in EXIT INT QUIT HUP TERM; do
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trap "set +e; cleanup" "$sig"
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done
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function die {
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local status_code="$1"
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shift
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(>&2 echo "${@}")
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exit "$status_code"
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}
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function log {
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(>&2 echo "${@}")
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}
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############## Program #########################
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function main {
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log "Is is recommended that the output of \`mktemp -d -t 'compare_bisect.XXXXXXXX'\` is inside a tmpfs filesystem since this script will make many writes to these folders."
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local target_full_path=$($REALPATH "$1")
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SOURCE_FOLDER=$(dirname "$target_full_path")
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TARGET_DOCUMENT=$(basename "$target_full_path")
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local good=0
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local bad=$(wc -l "$SOURCE_FOLDER/$TARGET_DOCUMENT" | awk '{print $1}')
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set +e
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run_parse "$bad" &> /dev/null
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local status=$?
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set -e
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if [ $status -eq 0 ]; then
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log "Entire file passes."
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exit 0
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fi
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while [[ "$((bad - good))" -gt 1 ]]; do
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local next_line=$((((bad - good) / 2) + good))
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log "Testing line $next_line"
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set +e
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run_parse "$next_line" &> /dev/null
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local status=$?
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set -e
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if [ $status -eq 0 ]; then
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good="$next_line"
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log "Line $next_line good"
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else
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bad="$next_line"
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log "Line $next_line bad"
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fi
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done
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echo "Bad line: $bad"
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}
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function setup_temp_dir {
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local temp_dir=$(mktemp -d -t 'compare_bisect.XXXXXXXX')
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cp -r "$SOURCE_FOLDER/"* "$temp_dir/"
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echo "$temp_dir"
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}
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function run_parse {
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local lines="$1"
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local temp_dir=$(setup_temp_dir)
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folders+=("$temp_dir")
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cat "$SOURCE_FOLDER/$TARGET_DOCUMENT" | head -n "$lines" > "$temp_dir/$TARGET_DOCUMENT"
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"${DIR}/run_docker_compare.bash" "$temp_dir/$TARGET_DOCUMENT"
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local status=$?
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rm -rf "$temp_dir"
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# TODO: Remove temp_dir from folders
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return "$status"
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}
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main "${@}"
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