no-google/install.sh
PoorPockets McNewHold cadd9f8198 Actually modified the regex list installer
Forgot to actually modify it. Now, it should work.
2019-07-21 11:41:28 +00:00

263 lines
8.9 KiB
Bash

#!/usr/bin/env bash
#Credits goes of course to mmoti for his regex list script
# Set variables
db_gravity='/etc/pihole/gravity.db'
file_pihole_regex='/etc/pihole/regex.list'
file_mmotti_regex='/etc/pihole/mmotti-regex.list'
file_mmotti_remote_regex='https://github.com/nickspaargaren/pihole-google/blob/master/regex.list'
installer_comment='github.com/nickspaargaren/pihole-google'
# Determine whether we are using Pi-hole DB
if [[ -s "${db_gravity}" ]]; then
usingDB=true
fi
# Functions
function fetchResults {
local selection="${1}" action="${2}" queryStr
# Select * if not set
[[ -z "${selection}" ]] && selection='*'
# Determine course of action
case "${action}" in
migrated_regexps ) queryStr="Select ${selection} FROM regex WHERE comment='${installer_comment}'";;
user_created ) queryStr="Select ${selection} FROM regex WHERE comment IS NULL OR comment!='${installer_comment}'";;
current_id ) queryStr="Select ${selection} FROM regex ORDER BY id DESC LIMIT 1";;
* ) queryStr="Select ${selection} FROM regex";;
esac
# Execute SQL query
sqlite3 ${db_gravity} "${queryStr}" 2>&1
# Check exit status
status="$?"
[[ "${status}" -ne 0 ]] && { (>&2 echo '[i] An error occured whilst fetching results'); return 1; }
return 0
}
function updateDB() {
local inputData="${1}" action="${2}" queryStr
# Determine course of action
case "${action}" in
remove_pre_migrated ) queryStr="DELETE FROM regex WHERE domain in (${inputData})";;
remove_migrated ) queryStr="DELETE FROM regex WHERE comment = '${installer_comment}'";;
* ) return ;;
esac
# Execute SQL query
sudo sqlite3 ${db_gravity} "${queryStr}"
# Check exit status
status="$?"
[[ "${status}" -ne 0 ]] && { (>&2 echo '[i] An error occured whilst updating database'); return 1; }
return 0
}
function generateCSV() {
# Exit if there is a problem with the remoteRegex string
[[ -z "${1}" ]] && exit 1
local remoteRegex timestamp queryArr file_csv_tmp
# Set local variables
remoteRegex="${1}"
timestamp="$(date --utc +'%s')"
file_csv_tmp="$(mktemp -p "/tmp" --suffix=".csv")"
iteration="$(fetchResults "id" "current_id")"
# At this point we need to double check that there wasn't an error (rather than no result) when trying to
# retrieve the current iteration.
status="$?"
[[ "${status}" -ne 0 ]] && return 1
# Create array to hold import string
declare -a queryArr
# Start of processing
# If we got the id of the last item in the regex table, iterate once
# Otherwise set the iterator to 1
[[ -n "${iteration}" ]] && ((iteration++)) || iteration=1
# Iterate through the remote regexps
# So long as the line is not empty, generate the CSV values
while read -r regexp; do
if [[ -n "${regexp}" ]]; then
queryArr+=("${iteration},\"${regexp}\",1,${timestamp},${timestamp},\"${installer_comment}\"")
((iteration++))
fi
done <<< "${remoteRegex}"
# If our array is populated then output the results to a temporary file
if [[ "${#queryArr[@]}" -gt 0 ]]; then
printf '%s\n' "${queryArr[@]}" > "${file_csv_tmp}"
else
return 1
fi
# Output the CSV path
echo "${file_csv_tmp}"
return 0
}
echo "[i] Fetching mmotti's regexps"
# Fetch the remote regex file and remove comment lines
mmotti_remote_regex=$(wget -qO - "${file_mmotti_remote_regex}" | grep '^[^#]')
# Conditional exit if empty
[[ -z "${mmotti_remote_regex}" ]] && { echo '[i] Failed to download pihole-google regex list'; exit 1; }
echo '[i] Fetching existing regexps'
# Conditionally fetch existing regexps depending on
# whether the user has migrated to the Pi-hole DB or not
if [[ "${usingDB}" == true ]]; then
str_regex=$(fetchResults "domain")
else
str_regex=$(grep '^[^#]' < "${file_pihole_regex}")
fi
# Starting the install process
# If we're using the Pi-hole DB
if [[ "${usingDB}" == true ]]; then
# If we found regexps in the database
if [[ -n "${str_regex}" ]] ; then
echo '[i] Checking for previous migration'
# Check whether this script has previously migrated our regexps
db_migrated_regexps=$(fetchResults "domain" "migrated_regexps")
# If migration is detected
if [[ -n "${db_migrated_regexps}" ]]; then
echo '[i] Previous migration detected'
# As we have already migrated the user, we need to check
# whether the regexps in the database are up-to-date
echo '[i] Checking whether updates are required'
# Use comm -3 to suppress lines that appear in both files
# If there are any results returned, this will quickly tell us
# that there are discrepancies
updatesRequired=$(comm -3 <(sort <<< "${db_migrated_regexps}") <(sort <<< "${mmotti_remote_regex}"))
# Conditional exit if no updates are required
[[ -z "${updatesRequired}" ]] && { echo '[i] Local regex filter is already up-to-date'; exit 0; }
# Now we know that updates are required, it's easiest to start a fresh
echo '[i] Running removal query'
# Clear our previously migrated domains from the regex table
updateDB "" "remove_migrated"
else
echo '[i] No previous migration detected'
# As we haven't yet migrated, we need to manually remove matches
# If we have a local mmotti-regex.list, read from that as it was used on the last install (pre-db)
# Otherwise, default to the latest remote copy
if [[ -s "${file_mmotti_regex}" ]]; then
# Only return regexps in both the regex table and regex file
mapfile -t result <<< "$(comm -12 <(sort <<< "${str_regex}") <(sort < "${file_mmotti_regex}"))"
else
# Only return regexps in both the regex table and regex file
mapfile -t result <<< "$(comm -12 <(sort <<< "${str_regex}") <(sort <<< "${mmotti_remote_regex}"))"
fi
# If we have matches in both the regex table and regex file
if [[ -n "${result[*]}" ]]; then
echo '[i] Forming removal string'
# regexstring --> 'regexstring1','regexstring2',
# Then remove the trailing comma
removalStr=$(printf "'%s'," "${result[@]}" | sed 's/,$//')
# If our removal string is not empty (sanity check)
if [[ -n "${removalStr}" ]]; then
echo '[i] Running removal query'
# Remove regexps from the regex table if there are in the
# removal string
updateDB "${removalStr}" "remove_pre_migrated"
fi
fi
fi
else
echo '[i] No regexps currently exist in the database'
fi
# Create our CSV
echo '[i] Generating CSV file'
csv_file=$(generateCSV "${mmotti_remote_regex}")
# Conditional exit
if [[ -z "${csv_file}" ]] || [[ ! -s "${csv_file}" ]]; then
echo '[i] Error: Generated CSV is empty'; exit 1;
fi
# Construct correct input format for import
echo '[i] Importing CSV to DB'
printf ".mode csv\\n.import \"%s\" %s\\n" "${csv_file}" "regex" | sudo sqlite3 "${db_gravity}" 2>&1
# Check exit status
status="$?"
[[ "${status}" -ne 0 ]] && { echo '[i] An error occured whilst importing the CSV into the database'; exit 1; }
# Status update
echo '[i] Regex import complete'
# Refresh Pi-hole
echo '[i] Refreshing Pi-hole'
pihole restartdns reload > /dev/null
# Remove the old mmotti-regex file
[[ -e "${file_mmotti_regex}" ]] && sudo rm -f "${file_mmotti_regex}"
# Output regexps currently in the DB
echo $'\n'
echo 'These are your current regexps:'
fetchResults "domain" | sed 's/^/ /'
else
if [[ -n "${str_regex}" ]]; then
# Restore config prior to previous install
# Keep entries only unique to pihole regex
if [[ -s "${file_mmotti_regex}" ]]; then
echo "[i] Removing pihole-google regex.list from a previous install"
comm -23 <(sort <<< "${str_regex}") <(sort "${file_mmotti_regex}") | sudo tee $file_pihole_regex > /dev/null
sudo rm -f "${file_mmotti_regex}"
else
# In the event that file_mmotti_regex is not available
# Match against the latest remote list instead
echo "[i] Removing pihole-google regex.list from a previous install"
comm -23 <(sort <<< "${str_regex}") <(sort <<< "${mmotti_remote_regex}") | sudo tee $file_pihole_regex > /dev/null
fi
fi
# Copy latest regex list to file_mmotti_regex dir
echo "[i] Copying remote regex.list to ${file_mmotti_regex}"
echo "${mmotti_remote_regex}" | sudo tee "${file_mmotti_regex}" > /dev/null
# Status update
echo "[i] $(wc -l <<< "${mmotti_remote_regex}") regexps found in mmotti's regex.list"
# If pihole regex is not empty after changes
if [[ -s "${file_pihole_regex}" ]]; then
# Extract non mmotti-regex entries
existing_regex_list="$(grep '^[^#]' < "${file_pihole_regex}")"
# Form output (preserving existing config)
echo "[i] $(wc -l <<< "$existing_regex_list") regexps exist outside of mmotti's regex.list"
final_regex=$(printf "%s\n" "${mmotti_remote_regex}" "${existing_regex_list}")
else
echo "[i] No regex.list differences to mmotti's regex.list"
final_regex=$(printf "%s\n" "$mmotti_remote_regex")
fi
# Output to regex.list
echo "[i] Saving to ${file_pihole_regex}"
LC_COLLATE=C sort -u <<< "${final_regex}" | sudo tee $file_pihole_regex > /dev/null
# Refresh Pi-hole
echo "[i] Refreshing Pi-hole"
pihole restartdns reload > /dev/null
echo "[i] Done"
# Output to user
echo $'\n'
cat $file_pihole_regex
fi
exit 0