#!/bin/bash
#
# This script builds minidump_stackwalk binaries from the Google Breakpad
# source for all of the operating systems that we run Firefox tests on:
# Linux x86, Linux x86-64, Windows x86, OS X x86-64.
#
# It expects to be run in the luser/breakpad-builder:0.7 Docker image and
# needs access to the relengapiproxy to download internal tooltool files.

set -v -e -x

# This is a pain to support properly with gclient.
#: BREAKPAD_REPO        ${BREAKPAD_REPO:=https://google-breakpad.googlecode.com/svn/trunk/}
: BREAKPAD_REV         "${BREAKPAD_REV:=master}"
: STACKWALK_HTTP_REPO  "${STACKWALK_HTTP_REPO:=https://hg.mozilla.org/users/tmielczarek_mozilla.com/stackwalk-http}"
: STACKWALK_HTTP_REV   "${STACKWALK_HTTP_REV:=default}"

ncpu=$(getconf _NPROCESSORS_ONLN)

function build()
{
    cd /tmp
    local platform=$1
    local strip_prefix=$2
    local configure_args=$3
    local make_args=$4
    local objdir=/tmp/obj-breakpad-$platform
    local ext=
    if test "$platform" = "win32"; then
        ext=.exe
    fi
    rm -rf "$objdir"
    mkdir "$objdir"
    # First, build Breakpad
    cd "$objdir"
    # shellcheck disable=SC2086
    CFLAGS="-O2 $CFLAGS" CXXFLAGS="-O2 $CXXFLAGS" /tmp/breakpad/src/configure --disable-tools $configure_args
    # shellcheck disable=SC2086
    make -j$ncpu $make_args src/libbreakpad.a src/third_party/libdisasm/libdisasm.a src/processor/stackwalk_common.o
    # Second, build stackwalk-http
    make -f /tmp/stackwalk-http/Makefile BREAKPAD_SRCDIR=/tmp/breakpad/src "BREAKPAD_OBJDIR=$(pwd)" "OS=$platform" "-j$ncpu"
    "${strip_prefix}strip" "stackwalk${ext}"
    cp "stackwalk${ext}" "/tmp/stackwalker/${platform}-minidump_stackwalk${ext}"
}

function linux64()
{
    export LDFLAGS="-static-libgcc -static-libstdc++"
    build linux64
    unset LDFLAGS
}

function linux32()
{
    export LDFLAGS="-static-libgcc -static-libstdc++ -L/tmp/libcurl-i386/lib"
    export CFLAGS="-m32 -I/tmp/libcurl-i386/include"
    export CXXFLAGS="-m32 -I/tmp/libcurl-i386/include"
    build linux32 "" "--enable-m32"
    unset LDFLAGS CFLAGS CXXFLAGS
}

function macosx64()
{
    cd /tmp
    if ! test -d MacOSX10.7.sdk; then
      python tooltool.py -v --manifest=macosx-sdk.manifest --url=http://relengapi/tooltool/ fetch
    fi
    export MACOSX_SDK=/tmp/MacOSX10.7.sdk
    export CCTOOLS=/tmp/cctools
    local FLAGS="-stdlib=libc++ -target x86_64-apple-darwin10 -mlinker-version=136 -B /tmp/cctools/bin -isysroot ${MACOSX_SDK} -mmacosx-version-min=10.7"
    export CC="clang $FLAGS"
    export CXX="clang++ $FLAGS -std=c++11"
    local old_path="$PATH"
    export PATH="/tmp/clang/bin:/tmp/cctools/bin/:$PATH"
    export LD_LIBRARY_PATH=/usr/lib/llvm-3.6/lib/

    build macosx64 "/tmp/cctools/bin/x86_64-apple-darwin10-" "--host=x86_64-apple-darwin10" "AR=/tmp/cctools/bin/x86_64-apple-darwin10-ar"

    unset CC CXX LD_LIBRARY_PATH MACOSX_SDK CCTOOLS
    export PATH="$old_path"
}

function win32()
{
    export LDFLAGS="-static-libgcc -static-libstdc++"
    export CFLAGS="-D__USE_MINGW_ANSI_STDIO=1"
    export CXXFLAGS="-D__USE_MINGW_ANSI_STDIO=1"
    export ZLIB_DIR=/tmp/zlib-mingw
    build win32 "i686-w64-mingw32-" "--host=i686-w64-mingw32"
    unset LDFLAGS CFLAGS CXXFLAGS ZLIB_DIR
}

cd /tmp
if ! test -d depot_tools; then
  git clone https://chromium.googlesource.com/chromium/tools/depot_tools.git
else
  (cd depot_tools; git pull origin master)
fi
export PATH=$(pwd)/depot_tools:"$PATH"
if ! test -d breakpad; then
    mkdir breakpad
    pushd breakpad
    fetch breakpad
    popd
else
    pushd breakpad/src
    git pull origin master
    popd
fi
pushd breakpad/src
git checkout "${BREAKPAD_REV}"
gclient sync
popd

(cd breakpad/src; git rev-parse master)
if ! test -d stackwalk-http; then
  hg clone -u "$STACKWALK_HTTP_REV" "$STACKWALK_HTTP_REPO"
else
  (cd stackwalk-http && hg pull "$STACKWALK_HTTP_REPO" && hg up "$STACKWALK_HTTP_REV")
fi
mkdir -p stackwalker
linux64
linux32
macosx64
win32