#!/bin/bash

# Find out ASAP if some command breaks here, because we're copying a lot of
# files we don't actually maintain ourselves, and requirements could easily be
# broken.
set -e

: ${MKDIR:=mkdir}
: ${TAR:=tar}
: ${AUTOCONF:=autoconf-2.13}
: ${SRCDIR:=$(cd $(dirname $0); pwd 2>/dev/null)}
: ${MOZJS_NAME:=mozjs}
# The place to gather files to be added to the tarball.
: ${STAGING:=/tmp/mozjs-src-pkg}
# The place to put the resulting tarball.
: ${DIST:=/tmp}

if [[ -f "$SRCDIR/../../config/milestone.txt" ]]; then
    MILESTONE="$(tail -1 $SRCDIR/../../config/milestone.txt)"
    IFS=. read -a VERSION < <(echo "$MILESTONE")
    MOZJS_MAJOR_VERSION=${MOZJS_MAJOR_VERSION:-${VERSION[0]}}
    MOZJS_MINOR_VERSION=${MOZJS_MINOR_VERSION:-${VERSION[1]}}
    MOZJS_PATCH_VERSION=${MOZJS_PATCH_VERSION:-${VERSION[2]}}
fi

cmd=${1:-build}
version="${MOZJS_NAME}-${MOZJS_MAJOR_VERSION}.${MOZJS_MINOR_VERSION}.${MOZJS_PATCH_VERSION:-${MOZJS_ALPHA:-0}}"
tgtpath=${STAGING}/${version}
pkg="${version}.tar.bz2"
pkgpath="${DIST}/${pkg}"
taropts="-jcf"

# need these environment vars:
echo "Environment:"
echo "    MAKE = $MAKE"
echo "    MKDIR = $MKDIR"
echo "    TAR = $TAR"
echo "    AUTOCONF = $AUTOCONF"
echo "    STAGING = $STAGING"
echo "    DIST = $DIST"
echo "    SRCDIR = $SRCDIR"
echo "    MOZJS_NAME = $MOZJS_NAME"
echo "    MOZJS_MAJOR_VERSION = $MOZJS_MAJOR_VERSION"
echo "    MOZJS_MINOR_VERSION = $MOZJS_MINOR_VERSION"
echo "    MOZJS_PATCH_VERSION = $MOZJS_PATCH_VERSION"
echo "    MOZJS_ALPHA = $MOZJS_ALPHA"
echo ""

TOPSRCDIR=${SRCDIR}/../..

case $cmd in
"clean")
    echo "Cleaning ${pkgpath} and ${tgtpath} ..."
    rm -rf ${pkgpath} ${tgtpath}
    ;;
"build")
    # Make sure that everything copied here is kept in sync with
    # `testing/taskcluster/tasks/branches/base_jobs.yml`!

    if [ -e ${tgtpath}/js/src/Makefile ]; then
        echo "error: found js/src/Makefile. Please clean before packaging." >&2
        exit 1
    fi

    echo "Staging source tarball in ${tgtpath}..."
    if [ -d ${tgtpath} ]; then
        echo "WARNING - dist tree ${tgtpath} already exists!"
    fi
    ${MKDIR} -p ${tgtpath}/js/src

    cp -pPR ${TOPSRCDIR}/configure.py \
       ${TOPSRCDIR}/moz.configure \
       ${TOPSRCDIR}/test.mozbuild \
       ${tgtpath}

    cp -pPR ${TOPSRCDIR}/js/moz.configure ${tgtpath}/js
    cp -pPR ${TOPSRCDIR}/js/ffi.configure ${tgtpath}/js

    mkdir -p ${tgtpath}/taskcluster
    cp -pPR ${TOPSRCDIR}/taskcluster/moz.build ${tgtpath}/taskcluster/

    # copy the embedded icu
    ${MKDIR} -p ${tgtpath}/intl
    cp -pPR ${TOPSRCDIR}/intl/icu ${tgtpath}/intl

    # copy main moz.build and Makefile.in
    cp -pPR ${TOPSRCDIR}/Makefile.in ${TOPSRCDIR}/moz.build ${tgtpath}

    # copy nspr.
    cp -pPR ${SRCDIR}/../../nsprpub ${tgtpath}

    # copy top-level build and config files.
    cp -p ${TOPSRCDIR}/configure.py ${TOPSRCDIR}/moz.configure ${tgtpath}

    # copy build and config directory.
    cp -pPR ${TOPSRCDIR}/build ${TOPSRCDIR}/config ${tgtpath}

    # generate configure files to avoid build dependency on autoconf-2.13
    cp -PR ${TOPSRCDIR}/js/src/configure.in ${tgtpath}/js/src/configure
    chmod a+x ${tgtpath}/js/src/configure
    ${AUTOCONF} --localdir=${TOPSRCDIR}/js/src \
        ${TOPSRCDIR}/js/src/old-configure.in >${tgtpath}/js/src/old-configure

    # put in js itself
    cp -pPR ${TOPSRCDIR}/mfbt ${tgtpath}
    cp -p ${SRCDIR}/../moz.configure ${tgtpath}/js
    cp -pPR ${SRCDIR}/../public ${tgtpath}/js
    cp -pPR ${SRCDIR}/../examples ${tgtpath}/js
    find ${SRCDIR} -mindepth 1 -maxdepth 1 -not -path ${STAGING} -a -not -name ${pkg} \
        -exec cp -pPR {} ${tgtpath}/js/src \;

    cp -pPR \
        ${TOPSRCDIR}/python \
        ${tgtpath}
    ${MKDIR} -p ${tgtpath}/dom/bindings
    cp -pPR \
        ${TOPSRCDIR}/dom/bindings/mozwebidlcodegen \
        ${tgtpath}/dom/bindings
    ${MKDIR} -p ${tgtpath}/media/webrtc/trunk/tools
    cp -pPR \
        ${TOPSRCDIR}/media/webrtc/trunk/tools/gyp \
        ${tgtpath}/media/webrtc/trunk/tools
    ${MKDIR} -p ${tgtpath}/testing
    cp -pPR \
        ${TOPSRCDIR}/testing/mozbase \
        ${tgtpath}/testing
    ${MKDIR} -p ${tgtpath}/modules
    cp -pPR \
       ${TOPSRCDIR}/modules/fdlibm \
       ${tgtpath}/modules/fdlibm
    cp -pPR \
        ${TOPSRCDIR}/modules/zlib/src/ \
        ${tgtpath}/modules/zlib
    ${MKDIR} -p ${tgtpath}/layout/tools/reftest
    cp -pPR \
        ${TOPSRCDIR}/layout/tools/reftest/reftest \
        ${tgtpath}/layout/tools/reftest
    ${MKDIR} -p ${tgtpath}/toolkit/mozapps/installer
    cp -pPR \
        ${TOPSRCDIR}/toolkit/mozapps/installer/package-name.mk \
        ${TOPSRCDIR}/toolkit/mozapps/installer/upload-files.mk \
        ${tgtpath}/toolkit/mozapps/installer
    ${MKDIR} -p ${tgtpath}/mozglue
    cp -pPR \
        ${TOPSRCDIR}/mozglue/build \
        ${TOPSRCDIR}/mozglue/misc \
        ${TOPSRCDIR}/mozglue/moz.build \
        ${tgtpath}/mozglue
    ${MKDIR} -p ${tgtpath}/memory
    cp -pPR \
        ${TOPSRCDIR}/memory/moz.build \
        ${TOPSRCDIR}/memory/build \
        ${TOPSRCDIR}/memory/fallible \
        ${TOPSRCDIR}/memory/mozalloc \
        ${TOPSRCDIR}/memory/mozjemalloc \
        ${tgtpath}/memory

    # remove *.pyc and *.pyo files if any
    find ${tgtpath} -type f -name "*.pyc" -o -name "*.pyo" |xargs rm -f

    # copy or create INSTALL
    if [ -e ${STAGING}/INSTALL ]; then
        cp ${STAGING}/INSTALL ${tgtpath}
    else
        cat <<INSTALL_EOF >${tgtpath}/INSTALL
Full build documentation for SpiderMonkey is hosted on MDN:
  https://developer.mozilla.org/en-US/docs/SpiderMonkey/Build_Documentation

Note that the libraries produced by the build system include symbols,
causing the binaries to be extremely large. It is highly suggested that \`strip\`
be run over the binaries before deploying them.

Building with default options may be performed as follows:
  cd js/src
  mkdir obj
  cd obj
  ../configure
  make # or mozmake on Windows
INSTALL_EOF
    fi

    # copy or create README
    if [ -e ${STAGING}/README ]; then
        cp ${STAGING}/README ${tgtpath}
    else
        cat <<README_EOF >${tgtpath}/README
This directory contains SpiderMonkey ${MOZJS_MAJOR_VERSION}.

This release is based on a revision of Mozilla ${MOZJS_MAJOR_VERSION}:
  http://hg.mozilla.org/releases/
The changes in the patches/ directory were applied.

MDN hosts the latest SpiderMonkey ${MOZJS_MAJOR_VERSION} release notes:
  https://developer.mozilla.org/en-US/docs/SpiderMonkey/${MOZJS_MAJOR_VERSION}
README_EOF
    fi

    # copy LICENSE
    if [ -e ${TOPSRCDIR}/b2g/LICENSE ]; then
        cp ${TOPSRCDIR}/b2g/LICENSE ${tgtpath}/
    else
        cp ${TOPSRCDIR}/LICENSE ${tgtpath}/
    fi

    # copy patches dir, if it currently exists in STAGING
    if [ -d ${STAGING}/patches ]; then
        cp -pPR ${STAGING}/patches ${tgtpath}
    elif [ -d ${TOPSRCDIR}/patches ]; then
        cp -pPR ${TOPSRCDIR}/patches ${tgtpath}
    fi

    # Roll the tarball
    echo "Packaging source tarball at ${pkgpath}..."
    ${TAR} $taropts ${pkgpath} -C ${STAGING} ${version}
    ;;
*)
    echo "Unrecognized command: $cmd"
    ;;
esac