#!/bin/bash

set -e

die () {
    echo "Error: $1" >&2
    exit 1
}

if ! [ -d installer-scripts ]
then
    die "Doesn't look like you are running this script from the right location"
fi

if [ "$#" -ne 1 ]
then
    die "Must be given on argument (the bindist)"
fi

BINDIST="$1"

GHC_UNPACKS_INTO=`echo "$BINDIST" | sed 's/^\(.*\/\)\{0,1\}\(ghc-\([0-9]\{1,\}\)\.\([0-9]\{1,\}\)\.\([0-9]\{1,\}\)\(\.\([0-9]\{1,\}\)\)\{0,1\}\)-\([a-z0-9_]\{1,\}\)-apple-darwin\.tar\.bz2$/\2/'`
GHC_VERSION_DIG1=`echo "$BINDIST" | sed 's/^\(.*\/\)\{0,1\}\(ghc-\([0-9]\{1,\}\)\.\([0-9]\{1,\}\)\.\([0-9]\{1,\}\)\(\.\([0-9]\{1,\}\)\)\{0,1\}\)-\([a-z0-9_]\{1,\}\)-apple-darwin\.tar\.bz2$/\3/'`
GHC_VERSION_DIG2=`echo "$BINDIST" | sed 's/^\(.*\/\)\{0,1\}\(ghc-\([0-9]\{1,\}\)\.\([0-9]\{1,\}\)\.\([0-9]\{1,\}\)\(\.\([0-9]\{1,\}\)\)\{0,1\}\)-\([a-z0-9_]\{1,\}\)-apple-darwin\.tar\.bz2$/\4/'`
GHC_VERSION_DIG3=`echo "$BINDIST" | sed 's/^\(.*\/\)\{0,1\}\(ghc-\([0-9]\{1,\}\)\.\([0-9]\{1,\}\)\.\([0-9]\{1,\}\)\(\.\([0-9]\{1,\}\)\)\{0,1\}\)-\([a-z0-9_]\{1,\}\)-apple-darwin\.tar\.bz2$/\5/'`
GHC_VERSION_DIG4=`echo "$BINDIST" | sed 's/^\(.*\/\)\{0,1\}\(ghc-\([0-9]\{1,\}\)\.\([0-9]\{1,\}\)\.\([0-9]\{1,\}\)\(\.\([0-9]\{1,\}\)\)\{0,1\}\)-\([a-z0-9_]\{1,\}\)-apple-darwin\.tar\.bz2$/\7/'`
GHC_ARCHITECTURE=`echo "$BINDIST" | sed 's/^\(.*\/\)\{0,1\}\(ghc-\([0-9]\{1,\}\)\.\([0-9]\{1,\}\)\.\([0-9]\{1,\}\)\(\.\([0-9]\{1,\}\)\)\{0,1\}\)-\([a-z0-9_]\{1,\}\)-apple-darwin\.tar\.bz2$/\8/'`

if [ "$GHC_ARCHITECTURE" == "$BINDIST" ]
then
    die "Bindist filename not in expected format"
fi

if [ "$(($GHC_VERSION_DIG2 % 2))" -eq 1 ]
then
    if [ "$GHC_VERSION_DIG4" == "" ]
    then
        FRAMEWORK_VERSION="$GHC_VERSION_DIG1.$GHC_VERSION_DIG2.$GHC_VERSION_DIG3-$GHC_ARCHITECTURE"
        CURRENT_PROJECT_VERSION=`printf "%02d%02d00.%08d\n" "$GHC_VERSION_DIG1" "$GHC_VERSION_DIG2" "$GHC_VERSION_DIG3"`
    else
        die "Huh? 4 component HEAD version?"
    fi
else
    if [ "$GHC_VERSION_DIG4" == "" ]
    then
        FRAMEWORK_VERSION="$GHC_VERSION_DIG1.$GHC_VERSION_DIG2.$GHC_VERSION_DIG3-$GHC_ARCHITECTURE"
        CURRENT_PROJECT_VERSION=`printf "%02d%02d%02d\n" "$GHC_VERSION_DIG1" "$GHC_VERSION_DIG2" "$GHC_VERSION_DIG3"`
    else
        FRAMEWORK_VERSION="$GHC_VERSION_DIG1.$GHC_VERSION_DIG2.$GHC_VERSION_DIG3.$GHC_VERSION_DIG4-$GHC_ARCHITECTURE"
        CURRENT_PROJECT_VERSION=`printf "%02d%02d%02d.%08d\n" "$GHC_VERSION_DIG1" "$GHC_VERSION_DIG2" "$GHC_VERSION_DIG3" "$GHC_VERSION_DIG4"`
    fi
fi

# The user-visible CFBundleShortVersionString
SHORT_VERSION_STRING="$FRAMEWORK_VERSION"

# Name of the installer package
PACKAGE_NAME="GHC-$FRAMEWORK_VERSION.pkg"

# Xcode's installation build product location (this is where the GHC.framework
# is assembled)
DSTROOT="/tmp/GHC.dst"

# Tools directory for a system volume install
TOOLS_SYSTEM="$DSTROOT/Library/Frameworks/GHC.framework/Versions/$FRAMEWORK_VERSION/Tools"

rm -rf "$DSTROOT"
mkdir -p "$TOOLS_SYSTEM"
sed "s/@FRAMEWORK_VERSION@/$FRAMEWORK_VERSION/" \
    < installer-scripts/Uninstaller.in          \
    > installer-scripts/Uninstaller
sed "s/@FRAMEWORK_VERSION@/$FRAMEWORK_VERSION/" \
    < installer-scripts/create-links.in         \
    > installer-scripts/create-links
sed "s/@FRAMEWORK_VERSION@/$FRAMEWORK_VERSION/" \
    < GHC-system.pmdoc/index.xml.in             \
    > GHC-system.pmdoc/index.xml
cp installer-scripts/Uninstaller installer-scripts/create-links "$TOOLS_SYSTEM"
xcodebuild -target GHC-systemwide clean build install         \
           BINDIST="$BINDIST"                                 \
           GHC_UNPACKS_INTO="$GHC_UNPACKS_INTO"               \
           CURRENT_PROJECT_VERSION="$CURRENT_PROJECT_VERSION" \
           SHORT_VERSION_STRING="$SHORT_VERSION_STRING"       \
           FRAMEWORK_VERSION="$FRAMEWORK_VERSION"             \
           CURRENT_LIBRARY_VERSION="$FRAMEWORK_VERSION"       \
           COMMAND_MODE=unix2003
rm -f GHC-system.pmdoc/*-contents.xml

/Developer/usr/bin/packagemaker             \
    -v --doc GHC-system.pmdoc               \
    -o $PACKAGE_NAME                        \
    -i org.haskell.ghc."$FRAMEWORK_VERSION"

# Clean up
xcodebuild -target GHC-systemwide clean                       \
           CURRENT_PROJECT_VERSION="$CURRENT_PROJECT_VERSION" \
           SHORT_VERSION_STRING="$SHORT_VERSION_STRING"       \
           FRAMEWORK_VERSION="$FRAMEWORK_VERSION"             \
           CURRENT_LIBRARY_VERSION="$FRAMEWORK_VERSION"       \
           COMMAND_MODE=unix2003
rm -r "$GHC_UNPACKS_INTO"
rm -r "$DSTROOT"
rm installer-scripts/Uninstaller installer-scripts/create-links
rm GHC-system.pmdoc/index.xml