#!/bin/sh
# set -u
function error () { printf >&2 "%s\n\nPlease see README.md for build instructions.\n" "$1"; exit 1; }

# =================================================
# = Fallback build directory and signing identity =
# =================================================

: ${builddir:=$HOME/build/TextMate}
: ${identity:=-}
: ${rest_api:=https://api.textmate.org}

# ========================================================
# = Application name, version, revision, and required OS =
# ========================================================

name=TextMate
ver=2.0.0-alpha.\$APP_REVISION${tag:-+git.$(git rev-parse --short HEAD)}
rev=$(( $(curl -sf "${rest_api}/releases/nightly/revision")+1 ))
min_os=10.7

# ===============================================
# = Find clang via xcrun, MacPorts, or Homebrew =
# ===============================================

clang_good_enough() {
	[[ -x "$CC" && -x "$CXX" ]] && "$CC" &>/dev/null -x objective-c -include Foundation/Foundation.h -c -o /dev/null - <<< 'int main () { id str = @("str"); return 0; }'
}
test_xcode_clang() {
	if which -s xcrun; then
		CC=$(xcrun -find clang)
		CXX=$(xcrun -find clang++)
		clang_good_enough && return
	fi
	false
}
test_local_clang() {
	for cc in /{opt,usr}/local/bin/clang /usr/bin/clang; do
		CC="${cc}"
		CXX="${cc}++"
		clang_good_enough && return
	done
	false
}

clang_good_enough || test_xcode_clang || test_local_clang || error "$CC is too old to build this project."

# ===============================
# = Check if boost is installed =
# ===============================

if which -s brew && [[ -z "$boostdir" && ! -d /usr/local/include/boost ]]; then
	boostdir=$(brew --prefix boost)/include/boost
fi

for dir in "${boostdir:-/usr/include/boost}" /{opt,usr}/local/include/boost ${CPATH//:/ }; do
	if [[ ! -L "${builddir}/include/boost" && -d "${dir}" ]]; then
		mkdir -p "${builddir}/include" && ln -fs "${dir}" "${builddir}/include/boost"
	fi
done

test -L "${builddir}/include/boost" || error "*** boost not installed."

# ==================================
# = Locate Xcode directory and SDK =
# ==================================

xcodedir=/Developer
sdk="/Developer/SDKs/${sdk:-MacOSX10.8}.sdk"

if which -s xcode-select; then
	xcodedir=$(xcode-select -print-path)
	if ! [[ -e "$sdk" ]]; then
		sdk="$xcodedir/Platforms/MacOSX.platform$sdk"
	fi
fi

if ! [[ -e "$sdk" ]]; then
	sdk=""
	echo 2>&1 "WARNING: Building without platform-specific SDK."
fi

# ===============================================
# = Check if we can use pbzip2 instead of bzip2 =
# ===============================================

bzip2_flag="-j"
if which -s pbzip2; then
	bzip2_flag="--use-compress-prog=pbzip2"
fi

# ==============================
# = Check various dependencies =
# ==============================

for dep in ninja ragel multimarkdown pgrep pkill "$CC" "$CXX"; do
	which -s "$dep" || error "*** dependency missing: ‘${dep}’."
done

# =====================================
# = Generate fixtures and build files =
# =====================================

mkdir -p "$builddir/Frameworks/SoftwareUpdate/fixtures"
DST=$(cd >/dev/null "$builddir/Frameworks/SoftwareUpdate/fixtures"; pwd) make -C Frameworks/SoftwareUpdate/fixtures

bin/gen_build -o build.ninja -C "$builddir" -dAPP_NAME="$name" -dAPP_REVISION="$rev" -dAPP_VERSION="$ver" -dAPP_MIN_OS="$min_os" -dCC="$CC" -dCXX="$CXX" -dxcodedir="$xcodedir" -didentity="$identity" -drest_api="$rest_api" -dsdk="$sdk" -dbzip2_flag="$bzip2_flag" target

BUNDLES_TBZ=Applications/TextMate/resources/DefaultBundles.tbz
test -e "$BUNDLES_TBZ" || builddir="$builddir" bin/create_default_bundles_tbz "$BUNDLES_TBZ"