build-hc-pkg

   1 #!/usr/bin/env bash
   2 set -e
   3
   4 function detect_platform_type () {
   5     local -r canon_name="canon-name/src/canon-name"
   6
   7     if ! gmake --question --file="mk/canon-name.mk" >/dev/null 2>&1; then
   8         gmake --file="mk/canon-name.mk" >&2
   9     fi
  10
  11     "$canon_name"
  12 }
  13
  14 function detect_number_of_cpus () {
  15     if ! sysctl -n hw.ncpu; then
  16         echo "WARNING: I don't know how to detect the number of processors on this platform." >&2
  17         echo "WARNING: GHC will be built using only 1 processor. Expect some slowdown." >&2
  18         echo 1
  19     fi
  20 }
  21
  22 function detect_gnu_tar () {
  23     if which gnutar >/dev/null 2>&1; then
  24         echo "gnutar"
  25     elif which gtar >/dev/null 2>&1; then
  26         echo "gtar"
  27     else
  28         echo "We need GNU tar to be installed." >&2
  29         exit 1
  30     fi
  31 }
  32
  33 function say_hello () {
  34     local -r platform=$(detect_platform_type)
  35     local -r n_cpus=$(detect_number_of_cpus)
  36
  37     echo "This is build-hc-pkg, running on $platform with $n_cpus processors."
  38 }
  39
  40 function srcpath () {
  41     local -r archive="work/archive"
  42     local srcpath=""
  43
  44     if [[ -e "$archive" ]]; then
  45         srcpath=$(cat "$archive")
  46     fi
  47
  48     if [[ -z "$srcpath" || ! -e "$srcpath" ]]; then
  49         mkdir -p work
  50         read -e -p "Enter the file path to ghc-x.y.z-src.tar.bz2: " srcpath
  51         if [[ -e "$srcpath" ]]; then
  52             mkdir -p work
  53             echo "$srcpath" > "$archive"
  54         else
  55             echo "$srcpath not found." >&2
  56             exit 1
  57         fi
  58     fi
  59
  60     echo "$srcpath"
  61 }
  62
  63 function build_hc_pkg () {
  64     local -r srcpath="$(srcpath)"
  65
  66     gmake \
  67         -j $(($(detect_number_of_cpus) + 1)) \
  68         -f mk/main.mk \
  69         SRCPATH="$srcpath" \
  70         PLATFORM="$(detect_platform_type)" \
  71         GNUTAR="$(detect_gnu_tar)" \
  72         SHELL="$SHELL"
  73
  74     echo "If you are done, run \"$0 clean\" to cleanup the working directory."
  75 }
  76
  77 function main () {
  78     case "$1" in
  79         "")
  80             say_hello
  81             build_hc_pkg
  82             exit
  83             ;;
  84         "clean")
  85             echo "Cleaning..."
  86             rm -rf work
  87             exit
  88             ;;
  89         *)
  90             echo "Usage: $0 [clean]" >&2
  91             exit 1
  92             ;;
  93     esac
  94 }
  95
  96 main $@