#!/bin/bash
# shellcheck disable=SC1117

set -e -o pipefail -u

# Utility function to log an error message and exit with an error code.
source scripts/build/termux_error_exit.sh

if [ "$(uname -o)" = Android ]; then
	termux_error_exit "On-device builds are not supported - see README.md"
fi

# Lock file to prevent parallel running in the same environment.
TERMUX_BUILD_LOCK_FILE="/tmp/.termux-build.lck"
if [ ! -e "$TERMUX_BUILD_LOCK_FILE" ]; then
	touch "$TERMUX_BUILD_LOCK_FILE"
fi

# Special variable for internal use. It forces script to ignore
# lock file.
: "${TERMUX_BUILD_IGNORE_LOCK:=false}"

# Utility function to download a resource with an expected checksum.
source scripts/build/termux_download.sh

# Utility function for golang-using packages to setup a go toolchain.
source scripts/build/setup/termux_setup_golang.sh

# Utility function for rust-using packages to setup a rust toolchain.
source scripts/build/setup/termux_setup_rust.sh

# Utility function to setup a current ninja build system.
source scripts/build/setup/termux_setup_ninja.sh

# Utility function to setup a current meson build system.
source scripts/build/setup/termux_setup_meson.sh

# Utility function to setup a current cmake build system
source scripts/build/setup/termux_setup_cmake.sh

# Utility function to setup protobuf:
source scripts/build/setup/termux_setup_protobuf.sh

# First step is to handle command-line arguments. Not to be overridden by packages.
source scripts/build/termux_step_handle_arguments.sh

# Setup variables used by the build. Not to be overridden by packages.
source scripts/build/termux_step_setup_variables.sh

# Save away and restore build setups which may change between builds.
source scripts/build/termux_step_handle_buildarch.sh

# Function to get TERMUX_PKG_VERSION from build.sh
source scripts/build/termux_extract_dep_info.sh

# Function that downloads a .deb (using the termux_download function)
source scripts/build/termux_download_deb.sh

# Script to download InRelease, verify it's signature and then download Packages.xz by hash
source scripts/build/termux_get_repo_files.sh

# Source the package build script and start building. No to be overridden by packages.
source scripts/build/termux_step_start_build.sh

# Run just after sourcing $TERMUX_PKG_BUILDER_SCRIPT. May be overridden by packages.
source scripts/build/termux_step_extract_package.sh

# Hook for packages to act just after the package has been extracted.
# Invoked in $TERMUX_PKG_SRCDIR.
termux_step_post_extract_package() {
	return
}

# Optional host build. Not to be overridden by packages.
source scripts/build/termux_step_handle_hostbuild.sh

# Perform a host build. Will be called in $TERMUX_PKG_HOSTBUILD_DIR.
# After termux_step_post_extract_package() and before termux_step_patch_package()
source scripts/build/termux_step_host_build.sh

# Setup a standalone Android NDK toolchain. Not to be overridden by packages.
source scripts/build/termux_step_setup_toolchain.sh

# Apply all *.patch files for the package. Not to be overridden by packages.
source scripts/build/termux_step_patch_package.sh

# Replace autotools build-aux/config.{sub,guess} with ours to add android targets.
source scripts/build/termux_step_replace_guess_scripts.sh

# For package scripts to override. Called in $TERMUX_PKG_BUILDDIR.
termux_step_pre_configure() {
	return
}

# Setup configure args and run $TERMUX_PKG_SRCDIR/configure. This function is called from termux_step_configure
source scripts/build/configure/termux_step_configure_autotools.sh

# Setup configure args and run cmake. This function is called from termux_step_configure
source scripts/build/configure/termux_step_configure_cmake.sh

# Setup configure args and run meson. This function is called from termux_step_configure
source scripts/build/configure/termux_step_configure_meson.sh

# Configure the package
source scripts/build/configure/termux_step_configure.sh

# Hook for packages after configure step
termux_step_post_configure() {
	return
}

# Make package, either with ninja or make
source scripts/build/termux_step_make.sh

# Make install, either with ninja, make of cargo
source scripts/build/termux_step_make_install.sh

# Hook function for package scripts to override.
termux_step_post_make_install() {
	return
}

# Function to cp (through tar) installed files to massage dir
source scripts/build/termux_step_extract_into_massagedir.sh

# Create all subpackages. Run from termux_step_massage
source scripts/build/termux_create_subpackages.sh

# Function to run various cleanup/fixes
source scripts/build/termux_step_massage.sh

# Hook for packages after massage step
termux_step_post_massage() {
	return
}

# Create data.tar.gz with files to package. Not to be overridden by package scripts.
source scripts/build/termux_step_create_datatar.sh

# Hook function to create {pre,post}install, {pre,post}rm-scripts and similar
termux_step_create_debscripts() {
	return
}

# Create the build deb file. Not to be overridden by package scripts.
source scripts/build/termux_step_create_debfile.sh

# Finish the build. Not to be overridden by package scripts.
source scripts/build/termux_step_finish_build.sh

{
	if ! $TERMUX_BUILD_IGNORE_LOCK; then
		flock -n 5 || termux_error_exit "Another build is already running within same environment."
	fi
	termux_step_handle_arguments "$@"
	termux_step_setup_variables
	termux_step_handle_buildarch
	termux_step_start_build
	termux_step_extract_package
	cd "$TERMUX_PKG_SRCDIR"
	termux_step_post_extract_package
	termux_step_handle_hostbuild
	termux_step_setup_toolchain
	termux_step_patch_package
	termux_step_replace_guess_scripts
	cd "$TERMUX_PKG_SRCDIR"
	termux_step_pre_configure
	cd "$TERMUX_PKG_BUILDDIR"
	termux_step_configure
	cd "$TERMUX_PKG_BUILDDIR"
	termux_step_post_configure
	cd "$TERMUX_PKG_BUILDDIR"
	termux_step_make
	cd "$TERMUX_PKG_BUILDDIR"
	termux_step_make_install
	cd "$TERMUX_PKG_BUILDDIR"
	termux_step_post_make_install
	cd "$TERMUX_PKG_MASSAGEDIR"
	termux_step_extract_into_massagedir
	cd "$TERMUX_PKG_MASSAGEDIR"
	termux_step_massage
	cd "$TERMUX_PKG_MASSAGEDIR/$TERMUX_PREFIX"
	termux_step_post_massage
	termux_step_create_datatar
	termux_step_create_debfile
	termux_step_finish_build
} 5< "$TERMUX_BUILD_LOCK_FILE"