Created
October 11, 2022 05:34
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#!/usr/bin/env bash | |
# https://stackoverflow.com/questions/51653450/show-call-stack-in-bash | |
stacktrace () { | |
local i=1 line file func | |
while read -r line func file < <(caller ${i}); do | |
echo >&2 "[${i}] ${file}:${line} ${func}()" | |
echo >&2 ">>> $(sed -n "${line}"p "${file}")" | |
((i++)) | |
done | |
} | |
export -f stacktrace | |
# Levels | |
# 0 = debug | |
# 1 = info | |
# 2 = warning | |
# 3 = error | |
print () { | |
local level="${1}" | |
local string="${2}" | |
if [[ "${level}" -lt 0 ]] || [[ "${level}" -gt 3 ]]; then | |
echo >&2 "[ERROR] Print level ${level} must be between 0 and 3 (inclusive)" # No recursive calls here! | |
stacktrace | |
return 1 | |
fi | |
if [[ "${level}" = 3 ]]; then | |
echo >&2 "[ERROR] ${string}" | |
stacktrace | |
elif [[ "${level}" = 2 ]]; then | |
echo "[WARN] ${string}" | |
elif [[ "${level}" = 1 ]] && ${INFO_ENABLED}; then | |
echo "[INFO] ${string}" | |
elif [[ "${level}" = 0 ]] && ${DEBUG_ENABLED}; then | |
echo "[DEBUG] ${string}" | |
fi | |
} | |
export -f print | |
lang_transform () { | |
local string="${1}" | |
local args=("${@:2}") | |
local args_len_mod=$(( "${#args[@]}" / 2 )) | |
local i | |
if (( "${#args[@]}" % 2 )); then | |
print 3 "lang_transform arg length is not divisible by 2: ${#args[@]}" # No recursive calls here! | |
return 1 | |
fi | |
for (( i = 0; i < args_len_mod; i += 2 )); do | |
local escaped | |
escaped="$(printf '%s\n' "${args[i]}" | sed -e 's/[]\/$*.^[]/\\&/g')" # Escape possible regex in search | |
string="${string//${escaped}/${args[((i+1))]}}" | |
done | |
echo "${string}" # Return string value | |
} | |
export -f lang_transform | |
var_is_set () { | |
local global="${1}" | |
if [[ -z "${!global+x}" ]]; then | |
return 1 | |
else | |
return 0 | |
fi | |
} | |
export -f var_is_set | |
var_is_set_error () { | |
local global="${1}" | |
if ! var_is_set "${global}"; then | |
print 3 "$(lang_transform "${LANG_VAR_NOT_SET}" "{var}" "${global}")" | |
return 1 | |
fi | |
} | |
export -f var_is_set_error | |
register () { | |
local var_name="${1}" | |
local var_value="${2}" | |
if ! var_is_set_error "TMP_DIR"; then return $?; fi | |
print 0 "register ${var_name}=${var_value}" | |
echo "'${var_name} ${var_value}'" | tee -a "${TMP_DIR}/registry.txt" &>/dev/null | |
} | |
export -f register | |
retrieve () { | |
local pattern="${1}" | |
if ! var_is_set_error "TMP_DIR"; then return $?; fi | |
if [[ -z "${pattern}" ]]; then | |
pattern=".*" | |
fi | |
if [[ ! "${pattern::1}" = "^" ]]; then | |
pattern="^${pattern}" | |
fi | |
if [[ ! "${pattern:-1}" = "$" ]]; then | |
pattern="${pattern}$" | |
fi | |
while read -r line; do | |
read -r -a arr <<< "${line}" | |
local vn="${arr[0]:1}" | |
local vv="${arr[1]::-1}" | |
if [[ "${vn}" =~ ${pattern} ]]; then | |
local n="${vn##*.}" | |
export "${n}"="${vv}" | |
print 0 "export ${n}=${vv}" | |
fi | |
done < "${TMP_DIR}/registry.txt" | |
} | |
export -f retrieve |
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