#!/bin/bash -

# FILE="/tmp/post-merge$(date +%FT%H-%M-%S)"
# commit=$(git rev-parse --verify HEAD)
# echo "$commit $(git cat-file commit $commit)" >> /tmp/post-merge

# Redirect output to stderr.
exec 1>&2

if [ -z $IFS ]; then
    IFS=$'\n'
fi

GIT_UPDATE_LOG=/opt/app/tools/atbupdate/update_log.csv

#TODO: use in UpdateController

get_blob () {   # get the blob of the file(name) passed as $1
                # note: this can be used for any file in the filesystem
    echo $(git hash-object $1)
}

get_commit_for_blob () {
    # search for the blob in all commits for the file(name) $1
    echo $(git log --all --pretty=format:%H -- $2   |
           xargs -I{} bash -c "git ls-tree {} -- $2 |
           grep -q $1 && echo -n {} && head -n 1")
}

write_log_file () {
    local now=$(date +"%Y-%m-%dT%T")
    for fn in $(git diff-tree -r HEAD@{1} HEAD --name-only); do
        if grep -qE "DC2C.*json" <<< $fn; then
            # called in repository: $fn is e.g. etc/psa_tariff/tariff01.json
            # add '/' prefix
            echo "DOWNLOAD, $(echo $fn | awk '{ printf "/"$0 }'), $now, N/A" >> "$GIT_UPDATE_LOG"
        elif grep -qE "dc2c.bin" <<< $fn; then
            # download the file referenced by the link dc2c.bin
            echo "DOWNLOAD, "/etc/dc/dc2c.bin", $now, N/A" >> "$GIT_UPDATE_LOG"
        elif grep -qE ".*opkg_commands" <<< $fn; then
            readarray opkg_commands < <(cat $fn)
            for opkg_c in "${opkg_commands[@]}"; do
                # check for lines longer than 'opkg '
                if [ "${#opkg_c}" -gt 4 ]; then
                    # comment: spaces, at least one '#'
                    grep -qE '^[[:space:]]*#+.*$' <<< "$opkg_c" && continue
                    echo -n "EXECUTE, $opkg_c, $now, N/A" | tr -d '\n\r' >> $GIT_UPDATE_LOG 2>&1
                    echo "" >> $GIT_UPDATE_LOG 2>&1
                fi
            done
        fi
    done
}

write_log_file

