1 #!/bin/bash

     2 # vim: set ft=sh :

     3 #

     4 # Logging output

     5 

     6 # Output message to stderr.

     7 function log_msg {

     8     echo "$*" >&2

     9 }

    10 

    11 # Output message to stderr, optionally with given color, if TTY.

    12 function log_color {

    13     local code=$1; shift

    14 

    15     if [ $IS_TTY ]; then

    16         echo $'\e['${code}'m'"$*"$'\e[00m' >&2

    17     else

    18         echo "$*" >&2

    19     fi

    20 }

    21 

    22 ## Log at various log-levels

    23 

    24 function log_error {

    25     [ $LOG_ERROR ] && log_color '31' "$*"

    26 }

    27 

    28 function log_warn {

    29     [ $LOG_WARN ] && log_color '33' "$*" || true

    30 }

    31 

    32 # plain

    33 function log {

    34     [ $LOG ] && log_msg "$*" || true

    35 }

    36 

    37 function log_force {

    38     [ $LOG_FORCE ] && log_color '2;33' "  $*" || true

    39 }

    40 

    41 function log_update {

    42     [ $LOG_UPDATE ] && log_color '36' "  $*" || true

    43 }

    44 

    45 function log_noop {

    46     [ $LOG_NOOP ] && log_color '2;34' "  $*" || true

    47 }

    48 

    49 function log_skip {

    50     [ $LOG_SKIP ] && log_color '1;34' "  $*" || true

    51 }

    52 

    53 function log_debug {

    54     [ $LOG_DEBUG ] && log_color 32 "    $*" || true

    55 }

    56 

    57 function log_cmd {

    58     [ $LOG_CMD ] && log_color 35 "        \$ $*" || true

    59 }

    60 

    61 # Output stacktrace, broken.

    62 function log_stack {

    63     local level=1

    64 

    65     while info=$(caller $level); do

    66         echo $info | read line sub file

    67 

    68         log_msg "$file:$lineno $sub()"

    69 

    70         level=$(($level + 1))

    71     done

    72 }

    73 

    74 # Output calling function's name.

    75 function func_caller {

    76     caller 1 | cut -d ' ' -f 2

    77 }

    78 

    79 ### High-level logging output

    80 # Log with func_caller at log_debug

    81 function debug {

    82     printf -v prefix "%s" $(func_caller)

    83 

    84     log_debug "$prefix: $*"

    85 }

    86 

    87 # Log with func_caller at log_error and exit, intended for internal errors...

    88 function fail {

    89     log_error "$(func_caller): $*"

    90 

    91     exit 2

    92 }

    93 

    94 # Log at log_error and exit

    95 function die {

    96     log_error "$*"

    97     exit 1

    98 }

    99 

   100