bootstrap

#! /bin/sh

fatal ()
{
  echo >&2 "$0: $@"
  exit 1
}

stderr ()
{
    echo >&2 "$0: $@"
}

usage ()
{
  cat <<EOF
Usage: $0 [OPTION]

Options:
  -h, --help              display this message
  -r, --regen             regenerate files stored in the repository

Report bugs to <olena-bugs@lrde.epita.fr>
EOF
}

# Regenerate files stored in the repository?
regen_p=false

awk_strverscmp='
  # Use only awk features that work with 7th edition Unix awk (1978).
  # My, what an old awk you have, Mr. Solaris!
  END {
    while (length(v1) || length(v2)) {
      # Set d1 to be the next thing to compare from v1, and likewise for d2.
      # Normally this is a single character, but if v1 and v2 contain digits,
      # compare them as integers and fractions as strverscmp does.
      if (v1 ~ /^[0-9]/ && v2 ~ /^[0-9]/) {
	# Split v1 and v2 into their leading digit string components d1 and d2,
	# and advance v1 and v2 past the leading digit strings.
	for (len1 = 1; substr(v1, len1 + 1) ~ /^[0-9]/; len1++) continue
	for (len2 = 1; substr(v2, len2 + 1) ~ /^[0-9]/; len2++) continue
	d1 = substr(v1, 1, len1); v1 = substr(v1, len1 + 1)
	d2 = substr(v2, 1, len2); v2 = substr(v2, len2 + 1)
	if (d1 ~ /^0/) {
	  if (d2 ~ /^0/) {
	    # Compare two fractions.
	    while (d1 ~ /^0/ && d2 ~ /^0/) {
	      d1 = substr(d1, 2); len1--
	      d2 = substr(d2, 2); len2--
	    }
	    if (len1 != len2 && ! (len1 && len2 && substr(d1, 1, 1) == substr(d2, 1, 1))) {
	      # The two components differ in length, and the common prefix
	      # contains only leading zeros.  Consider the longer to be less.
	      d1 = -len1
	      d2 = -len2
	    } else {
	      # Otherwise, compare as strings.
	      d1 = "x" d1
	      d2 = "x" d2
	    }
	  } else {
	    # A fraction is less than an integer.
	    exit 1
	  }
	} else {
	  if (d2 ~ /^0/) {
	    # An integer is greater than a fraction.
	    exit 2
	  } else {
	    # Compare two integers.
	    d1 += 0
	    d2 += 0
	  }
	}
      } else {
	# The normal case, without worrying about digits.
	if (v1 == "") d1 = v1; else { d1 = substr(v1, 1, 1); v1 = substr(v1,2) }
	if (v2 == "") d2 = v2; else { d2 = substr(v2, 1, 1); v2 = substr(v2,2) }
      }
      if (d1 < d2) exit 1
      if (d1 > d2) exit 2
    }
  }
'

version_compare ()
{
  awk "$awk_strverscmp" v1="$1" v2="$2" /dev/null
  case $? in
    1)  echo '<';;
    0)  echo '=';;
    2)  echo '>';;
  esac
}

# require TOOL REQUIREMENT [OPTION]
# ---------------------------------
# Test that TOOL exists, and its version is at least REQUIREMENT.
# If given, use OPTION to query TOOL; use `--version' otherwise.
require ()
{
  local option
  if test $# -eq 3; then option=$3; else option=--version; fi
  local version=$(eval "$1 $option" \
                  | sed -n 's/[^0-9.]*\([0-9][0-9.]*\).*/\1/p;q')
  test x"$version" != x ||
    fatal "$1 (version $2 or better) is required"
  case $(version_compare "$2" "$version") in
    '>') fatal "$1 $2 or better is required: this is $1 $version";;
  esac
}

# run DIRECTORY COMMAND-LINE
# --------------------------
run ()
{
    (
        set -e
        stderr "$@"
        cd "$1"
        shift
        if ! "$@"; then
            fatal "unexpected failure: $@"
            exit 1
        fi
    )
}


# Failures do matter.
set -e

# Process arguments.
for arg in "$@"; do
  case "$arg" in
    -h|--help) usage; exit 0 ;;
    -r|--regen) regen_p=true ;;
    *) fatal "error: unrecognized option: $1" ;;
  esac
done

# Requirements over bootstrap tools.
require autoconf 2.61
require automake 1.11
libtoolize=libtoolize
for l in "$LIBTOOLIZE" glibtoolize libtoolize;
do
  if ($l --version) >/dev/null 2>&1; then
    libtoolize=$l
    break
  fi
done
export LIBTOOLIZE=$libtoolize
require $libtoolize 1.5.22

require doxygen 1.5.6
# We used to require `convert' from ImageMagick 6.3.7, but `convert'
# from GraphicsMagick 1.3.12 is also fine.  Use that later revision
# number even if ImageMagick is actually used so as to be compatible
# with both implementations.
require convert 1.3.12 -version
require hevea 1.10 -version

# Regen files stored in the repository if asked so.
if $regen_p; then
  # Generate `milena/headers.mk'.
  (cd milena && ../build-aux/generate_dist_headers.sh mln headers.mk)
  # Generate `scribo/headers.mk'.
  (cd scribo && ../build-aux/generate_dist_headers.sh scribo headers.mk)

  # Generate files of Milena's documentation.
  # * Figures.
  (
    cd milena/doc
    rm -f figures.mk.tmp
    ./gen-figures-mk >figures.mk.tmp
    mv -f figures.mk.tmp figures.mk
    chmod -w figures.mk
  )
  # * Examples.
  rm -f milena/doc/examples.mk.tmp
  milena/doc/gen-make-variable EXAMPLES					      \
    `find milena/doc/examples -name '*.cc' | sed 's,^milena/doc,\$(srcdir),'` \
    >milena/doc/examples.mk.tmp
  mv -f milena/doc/examples.mk.tmp milena/doc/examples.mk
  chmod -w milena/doc/examples.mk
  # * Split examples.
  (
    cd milena/doc
    rm -f split-examples.mk.tmp
    ./gen-split-examples-mk >split-examples.mk.tmp
    mv -f split-examples.mk.tmp split-examples.mk
    chmod -w split-examples.mk
  )
  # * Outputs.
  rm -f milena/doc/outputs.mk.tmp
  milena/doc/gen-make-variable OUTPUTS				\
    `find milena/doc/examples -name \*.cc			\
       | sed -e 's,milena/doc/examples/,,'			\
             -e 'y,/,_,'					\
             -e 's,\(.*\)\.cc$,$(srcdir)/outputs/\1.txt,'`	\
    >milena/doc/outputs.mk.tmp
  mv -f milena/doc/outputs.mk.tmp milena/doc/outputs.mk
  chmod -w milena/doc/outputs.mk
  # * Outputs rules and timestamps.
  (
    cd milena/doc
    rm -f examples-outputs.mk.tmp
    ./gen-examples-outputs-mk					\
      `find examples -name \*.cc				\
         | env LC_ALL=C sort`					\
      >examples-outputs.mk.tmp
    mv -f examples-outputs.mk.tmp examples-outputs.mk
    chmod -w examples-outputs.mk
  )
  # * Split outputs.
  (
    cd milena/doc
    rm -f split-outputs.mk.tmp
    ./gen-split-outputs-mk >split-outputs.mk.tmp
    mv -f split-outputs.mk.tmp split-outputs.mk
    chmod -w split-outputs.mk
  )
fi

# Generate unit tests files.  These actions are not part of the `-r'
# option, since unit tests files are not stored in the repository.
#
# * Milena unit tests files.
run . ./build-aux/build_unit_test.sh		\
  milena/mln					\
  milena/tests/unit_test			\
  milena/tests/unit_test/disabled_tests		\
  mln
# *Scribo unit tests files.
run . ./build-aux/build_unit_test.sh    \
  scribo/scribo				\
  scribo/tests/unit_test		\
  scribo/tests/unit_test/disabled_tests \
  scribo

# Install the GNU Build System.
autoreconf -f -v -i