1 ## library functions

     2 

     3 function die () {

     4     echo "!!! $@" >&2

     5 

     6     exit 1

     7 }

     8 

     9 # Execute command verbosely, and exit on failure

    10 function cmd () {

    11     echo ">>> $@"

    12 

    13     [ $_MOCK ] && return 0

    14 

    15     eval "$@" # return $?

    16 }

    17 

    18 function expand_MB () {

    19     local size=${1^}

    20 

    21     case ${size: -1} in 

    22         G)

    23             size=$(( ${size%G} * 1024))

    24 

    25             ;;

    26     esac

    27 

    28     echo $size

    29 }

    30 

    31 function extract_iso () {

    32     iso=$1

    33     dst=$2

    34 

    35     [ ! -r "$iso" ] && die "Given .iso is not readable: $iso"

    36     [ -z "$dst" ] && die "Must give destination: $dst"

    37     [ -e "$dst" ] && die "Given destination already exists: $dst"

    38 

    39     # temporary mount

    40     mnt=$(mktemp -d mnt.XXXX)

    41 

    42     # clean on exit

    43     function cleanup () {

    44         if mountpoint -q $mnt; then

    45            sudo umount $mnt

    46         fi

    47 

    48         [ -d $mnt ] && rmdir $mnt

    49 

    50         return $1

    51     }

    52 

    53     # loop-mount

    54     cmd sudo mount -o loop $iso $mnt || cleanup 1

    55 

    56     # copy

    57     cmd cp -r $mnt $dst || cleanup 1

    58 

    59     # done, cleanup

    60     cleanup 0

    61 }

    62 

    63 function my_md5sum () {

    64     /usr/bin/md5sum $1 | (

    65         read md5sum path

    66         echo $md5sum

    67     )

    68 }

    69 

    70 function expand_template () {

    71     local tpl=$1

    72     local out=$2

    73 

    74     local linecount=0

    75 

    76     # read in each line at a time

    77     while IFS='' read -r line; do

    78         linecount=$((linecount + 1))

    79 

    80         if [ "${line:0:1}" == "#" ]; then

    81             # ignore comments; pass through as-is

    82             echo "$line"

    83         

    84         else

    85             # evaluate {...} expressions

    86             # a slight hack, but it works \o/

    87             # http://stackoverflow.com/questions/415677/how-to-replace-placeholders-in-a-text-file/7633579#7633579

    88             line="${line//\\/\\\\}"

    89             line="${line//\"/\\\"}"

    90             line="${line//\`/\\\`}"

    91             line="${line//\$/\\\$}"

    92             line="${line//{/\${}"   # This is just for vim: } "

    93 

    94             # echo "($line)" >&2

    95             (eval "echo \"$line\"") || die "Error at $tpl:$linecount: $line"

    96         fi

    97  

    98     done < $tpl > $out

    99 }

   100 

   101 # Recursive expand_template files from src -> dst

   102 # XXX: not used

   103 function expand_tree () {

   104     local src=$1

   105     local dst=$2

   106     local filter=${3:-'*'}

   107 

   108     for path in ${src}/${filter}; do

   109         local name=$(basename $path)

   110         local target=$dst/$name

   111 

   112         if [ -d $path ]; then

   113             echo "expand_tree: $path -> $target"

   114             echo "expand_tree $path $target $filter"

   115 

   116         elif [ -f $path ]; then

   117             echo "expand_file: $path -> $target"

   118             echo "expand_file $path $target"

   119 

   120         else

   121             echo "XXX: ignore weird file: $path"

   122 

   123         fi

   124     done

   125 }