#!/bin/bash
#
# /usr/local/sbin/custom-cleanup-script.sh
# Selective /tmp cleanup at boot, with safety checks and logging.

set -u

TARGET=/tmp
LOG=/var/log/tmp-cleanup.log

# Reset log on every boot
echo "=== $(date) ===" > "$LOG"

# Safety check 1: TARGET must be exactly /tmp
if [ "$TARGET" != "/tmp" ]; then
    echo "FATAL: TARGET is '$TARGET', not '/tmp'. Aborting." >> "$LOG"
    exit 1
fi

# Safety check 2: TARGET must be a real directory, not a symlink
if [ ! -d "$TARGET" ] || [ -L "$TARGET" ]; then
    echo "FATAL: $TARGET is not a real directory. Aborting." >> "$LOG"
    exit 1
fi

# Safety check 3: cd must succeed
cd "$TARGET" || {
    echo "FATAL: cannot cd to $TARGET. Aborting." >> "$LOG"
    exit 1
}

# Safety check 4: pwd must be exactly /tmp after cd
if [ "$(pwd -P)" != "/tmp" ]; then
    echo "FATAL: pwd is '$(pwd -P)', not '/tmp'. Aborting." >> "$LOG"
    exit 1
fi

echo "Safety checks passed. Cleaning $TARGET" >> "$LOG"

# Remove SlackBuild work directory entirely
rm -rf SBo >> "$LOG" 2>&1

# Remove generated Slackware packages
find . -maxdepth 1 -type f \( -name "*.tgz" -o -name "*.txz" \) -print -delete >> "$LOG" 2>&1

# Remove SlackBuild DESTDIR directories
find . -maxdepth 1 -type d -name "package-*" -print -exec rm -rf {} + >> "$LOG" 2>&1

# Remove extracted source directories matching name-version pattern
find . -maxdepth 1 -type d -regex './[a-zA-Z][a-zA-Z0-9_-]*-[0-9][0-9.]*.*' -print -exec rm -rf {} + >> "$LOG" 2>&1

# Remove build logs
find . -maxdepth 1 -type f -name "*.log" -delete >> "$LOG" 2>&1

# Remove orphaned wget lock files
find . -maxdepth 1 -name ".wget-*_lck_*" -delete >> "$LOG" 2>&1

# Remove Go build caches
find . -maxdepth 1 -name "go-build*" -exec rm -rf {} + >> "$LOG" 2>&1

echo "" >> "$LOG"
du -sh /tmp >> "$LOG" 2>&1