terom@82: #!/bin/bash
terom@82: # vim: set ft=sh :
terom@82: #
terom@82: # Logging output
terom@82: 
terom@82: # Output message to stderr.
terom@82: function log_msg {
terom@82:     echo "$*" >&2
terom@82: }
terom@82: 
terom@82: # Output message to stderr, optionally with given color, if TTY.
terom@82: function log_color {
terom@82:     local code=$1; shift
terom@82: 
terom@82:     if [ $IS_TTY ]; then
terom@82:         echo $'\e['${code}'m'"$*"$'\e[00m' >&2
terom@82:     else
terom@82:         echo "$*" >&2
terom@82:     fi
terom@82: }
terom@82: 
terom@82: ## Log at various log-levels
terom@82: # plain
terom@82: function log {
terom@82:     [ $LOG          ] && log_msg            "$*"            || true
terom@82: }
terom@82: 
terom@82: function log_error {
terom@82:     [ $LOG_ERROR    ] && log_color '31'     "$*"            || true
terom@82: }
terom@82: 
terom@82: function log_warn {
terom@82:     [ $LOG_WARN     ] && log_color '33'     "$*"            || true
terom@82: }
terom@82: 
terom@82: function log_force {
terom@82:     [ $LOG_FORCE    ] && log_color '2;33'   "  $*"          || true
terom@82: }
terom@82: 
terom@82: function log_update {
terom@82:     [ $LOG_UPDATE   ] && log_color '36'     "  $*"          || true
terom@82: }
terom@82: 
terom@90: function log_check {
terom@90:     [ $LOG_UPDATE   ] && log_color '37'     "  $*"          || true
terom@90: }
terom@90: 
terom@82: function log_noop {
terom@82:     [ $LOG_NOOP     ] && log_color '2;34'   "  $*"          || true
terom@82: }
terom@82: 
terom@82: function log_skip {
terom@82:     [ $LOG_SKIP     ] && log_color '1;34'   "  $*"          || true
terom@82: }
terom@82: 
terom@82: function log_debug {
terom@82:     [ $LOG_DEBUG    ] && log_color '32'     "    $*"        || true
terom@82: }
terom@82: 
terom@82: function log_cmd {
terom@82:     [ $LOG_CMD      ] && log_color '35'     "        \$ $*" || true
terom@82: }
terom@82: 
terom@82: # Output stacktrace, broken.
terom@82: function log_stack {
terom@82:     local level=1
terom@82: 
terom@82:     while info=$(caller $level); do
terom@82:         echo $info | read line sub file
terom@82: 
terom@82:         log_msg "$file:$lineno $sub()"
terom@82: 
terom@82:         level=$(($level + 1))
terom@82:     done
terom@82: }
terom@82: 
terom@82: # Output calling function's name.
terom@82: function func_caller {
terom@82:     caller 1 | cut -d ' ' -f 2
terom@82: }
terom@82: 
terom@82: ### High-level logging output
terom@82: # Log with func_caller at log_debug
terom@82: function debug {
terom@82:     printf -v prefix "%s" $(func_caller)
terom@82: 
terom@82:     log_debug "$prefix: $*"
terom@82: }
terom@82: 
terom@85: function warn {
terom@85:     log_warn "$(func_caller): $*"
terom@85: }
terom@85: 
terom@82: # Log with func_caller at log_error and exit, intended for internal errors...
terom@82: function fail {
terom@82:     log_error "$(func_caller): $*"
terom@82: 
terom@82:     exit 2
terom@82: }
terom@82: 
terom@82: # Log at log_error and exit
terom@82: function die {
terom@82:     log_error "$*"
terom@82:     exit 1
terom@82: }
terom@82: 
terom@82: