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# colored output
# --------------
BOLD=$(tput bold)
RST=$(tput sgr0)
RED=$(tput setaf 1)
GREEN=$(tput setaf 2)
YELLOW=$(tput setaf 3)
CYAN=$(tput setaf 6)
VERBOSE=
echoinfo() {
>&2 echo "${CYAN}$@${RST}"
}
echoerr() {
>&2 echo "${RED}${BOLD}error:${RST}${RED} $@${RST}"
}
echowarn() {
>&2 echo "${YELLOW}${BOLD}warning:${RST}${YELLOW} $@${RST}"
}
die() {
echoerr "$@"
exit 1
}
debug() {
if [ -n "$VERBOSE" ]; then
>&2 echo "$@"
fi
}
# measuring executing time
# ------------------------
__time_started=
time_start() {
__time_started=$(date +%s)
}
time_elapsed() {
local fin=$(date +%s)
echo $(( fin - __time_started ))
}
# config parsing
# --------------
read_config() {
local config_file="$1"
local dst="$2"
[ -f "$config_file" ] || die "read_config: $config_file: no such file"
local n=0
local failed=
local key
local value
while read line; do
n=$(( n+1 ))
# skip empty lines or comments
if [ -z "$line" ] || [[ "$line" =~ ^#.* ]]; then
continue
fi
if [[ $line = *"="* ]]; then
key="${line%%=*}"
value="${line#*=}"
eval "$dst[$key]=\"$value\""
else
echoerr "config: invalid line $n"
failed=1
fi
done < <(cat "$config_file")
[ -z "$failed" ]
}
check_config() {
local var="$1"
local keys="$2"
local failed=
for key in $keys; do
if [ -z "$(eval "echo -n \${$var[$key]}")" ]; then
echoerr "config: ${BOLD}${key}${RST}${RED} is missing"
failed=1
fi
done
[ -z "$failed" ]
}
# other functions
# ---------------
installed() {
command -v "$1" > /dev/null
return $?
}
download() {
local source="$1"
local target="$2"
if installed curl; then
curl -f -s -o "$target" "$source"
elif installed wget; then
wget -q -O "$target" "$source"
else
die "neither curl nor wget found, can't proceed"
fi
}
file_in_use() {
[ -n "$(lsof "$1")" ]
}
file_mtime() {
stat -c %Y "$1"
}
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