terom@60: #!/bin/bash
terom@52: # vim: set ft=sh :
terom@52: #
terom@52: # Logging output
terom@52: 
terom@52: # Output message to stderr.
terom@52: function log_msg {
terom@52:     echo "$*" >&2
terom@52: }
terom@52: 
terom@52: # Output message to stderr, optionally with given color, if TTY.
terom@52: function log_color {
terom@52:     local code=$1; shift
terom@52: 
terom@52:     if [ $IS_TTY ]; then
terom@52:         echo $'\e['${code}'m'"$*"$'\e[00m' >&2
terom@52:     else
terom@52:         echo "$*" >&2
terom@52:     fi
terom@52: }
terom@52: 
terom@52: ## Log at various log-levels
terom@52: 
terom@52: function log_error {
terom@52:     [ $LOG_ERROR ] && log_color '31' "$*"
terom@52: }
terom@52: 
terom@52: function log_warn {
terom@52:     [ $LOG_WARN ] && log_color '33' "$*" || true
terom@52: }
terom@52: 
terom@52: # plain
terom@52: function log {
terom@52:     [ $LOG ] && log_msg "$*" || true
terom@52: }
terom@52: 
terom@52: function log_force {
terom@52:     [ $LOG_FORCE ] && log_color '2;33' "  $*" || true
terom@52: }
terom@52: 
terom@52: function log_update {
terom@52:     [ $LOG_UPDATE ] && log_color '36' "  $*" || true
terom@52: }
terom@52: 
terom@52: function log_noop {
terom@52:     [ $LOG_NOOP ] && log_color '2;34' "  $*" || true
terom@52: }
terom@52: 
terom@52: function log_skip {
terom@52:     [ $LOG_SKIP ] && log_color '1;34' "  $*" || true
terom@52: }
terom@52: 
terom@52: function log_debug {
terom@52:     [ $LOG_DEBUG ] && log_color 32 "    $*" || true
terom@52: }
terom@52: 
terom@52: function log_cmd {
terom@52:     [ $LOG_CMD ] && log_color 35 "        \$ $*" || true
terom@52: }
terom@52: 
terom@52: # Output stacktrace, broken.
terom@52: function log_stack {
terom@52:     local level=1
terom@52: 
terom@52:     while info=$(caller $level); do
terom@52:         echo $info | read line sub file
terom@52: 
terom@52:         log_msg "$file:$lineno $sub()"
terom@52: 
terom@52:         level=$(($level + 1))
terom@52:     done
terom@52: }
terom@52: 
terom@52: # Output calling function's name.
terom@52: function func_caller {
terom@52:     caller 1 | cut -d ' ' -f 2
terom@52: }
terom@52: 
terom@52: ### High-level logging output
terom@52: # Log with func_caller at log_debug
terom@52: function debug {
terom@52:     printf -v prefix "%s" $(func_caller)
terom@52: 
terom@52:     log_debug "$prefix: $*"
terom@52: }
terom@52: 
terom@52: # Log with func_caller at log_error and exit, intended for internal errors...
terom@52: function fail {
terom@52:     log_error "$(func_caller): $*"
terom@52: 
terom@52:     exit 2
terom@52: }
terom@52: 
terom@52: # Log at log_error and exit
terom@52: function die {
terom@52:     log_error "$*"
terom@52:     exit 1
terom@52: }
terom@52: 
terom@52: