build-package.sh: Cleanup a bit

- Put everything into shell functions.
- Start fixing shellcheck warnings.
- Run a hostbuild before setting up an android toolchain (fixes #657).

It was quite a hasty rewrite, so things could be broken. Let me know!

disabled-packages/alpine/build.sh

@@ -4,9 +4,8 @@ TERMUX_PKG_VERSION=2.20
 TERMUX_PKG_SRCURL=http://patches.freeiz.com/alpine/release/src/alpine-${TERMUX_PKG_VERSION}.tar.xz
 #TERMUX_PKG_DEPENDS="pcre, openssl, libuuid"
 TERMUX_PKG_EXTRA_CONFIGURE_ARGS="  --with-c-client-target=lnx --without-pthread --without-password-prog --without-tcl --without-ldap --without-krb5 --disable-debug --with-system-pinerc=/data/data/com.termux/files/usr/etc/pine.conf --with-password-prog=no"
-export TERMUX_HOST_PLATFORM="${TERMUX_ARCH}-linux-android"
-if [ $TERMUX_ARCH = "arm" ]; then export TERMUX_HOST_PLATFORM="${TERMUX_HOST_PLATFORM}eabi"; fi
 TERMUX_PKG_BUILD_IN_SRC=yes
+
 termux_step_pre_configure () {
 	LDFLAGS+=" -lcrypt -llog"
 	cp $TERMUX_PKG_BUILDER_DIR/getpass.c $TERMUX_PKG_SRCDIR/include/
@@ -14,9 +13,10 @@ LDFLAGS+=" -lcrypt -llog"
 	cd $TERMUX_PKG_SRCDIR
 	autoreconf -if
 	touch $TERMUX_PKG_SRCDIR/imap/lnxok
-}
 	export TPATH=$PATH
-termux_step_pre_make () {
+}
+
+termux_step_post_configure() {
 	cd pith
 	$CC_FOR_BUILD help_c_gen.c -o help_c_gen
 	$CC_FOR_BUILD help_h_gen.c -o help_h_gen

packages/colordiff/build.sh

@@ -7,7 +7,7 @@ TERMUX_PKG_DEPENDS="perl"
 TERMUX_PKG_BUILD_IN_SRC=yes
 TERMUX_PKG_PLATFORM_INDEPENDENT=yes
 
-termux_step_pre_make(){
+termux_step_post_configure(){
 	export INSTALL_DIR=${PREFIX}/bin
 	export MAN_DIR=${PREFIX}/share/man/man1
 	export ETC_DIR=${PREFIX}/etc

packages/libluajit/build.sh

@@ -8,7 +8,7 @@ TERMUX_PKG_BUILD_IN_SRC=yes
 TERMUX_PKG_CONFLICTS="lua,lua-dev"
 TERMUX_PKG_REPLACES="lua,lua-dev"
 
-termux_step_post_extract_package() {
+termux_step_pre_configure() {
 	# luajit wants same pointer size for host and target build
 	export HOST_CC="gcc"
 	if [ $TERMUX_ARCH_BITS = "32" ]; then

packages/openssh/build.sh

@@ -16,7 +16,7 @@ termux_step_pre_configure() {
 	LDFLAGS+=" -llog" # liblog for android logging in syslog hack
 }
 
-termux_step_pre_make () {
+termux_step_post_configure() {
 	# We need to remove this file before installing, since otherwise the
 	# install leaves it alone which means no updated timestamps.
 	rm -Rf $TERMUX_PREFIX/etc/moduli

packages/tinyscheme/build.sh

@@ -12,7 +12,7 @@ termux_step_pre_configure () {
 
 # TODO: Add the tsx extension with file/networking (http://heras-gilsanz.com/manuel/tsx.html)
 #       and the regexp extension (http://downloads.sourceforge.net/project/tinyscheme/tinyscheme-regex/1.3/re-1.3.tar.gz)
-#termux_step_pre_make () {
+#termux_step_post_configure () {
 #TSX_TARFILE=$TERMUX_PKG_CACHEDIR/tsx-1.1.tar.gz
 #test ! -f $TSX_TARFILE && curl -o $TSX_TARFILE "http://heras-gilsanz.com/manuel/tsx-1.1.tgz"
 #}

packages/tty-clock/build.sh

@@ -9,7 +9,7 @@ TERMUX_PKG_FOLDERNAME=tty-clock-${_COMMIT}
 TERMUX_PKG_DEPENDS="ncurses"
 TERMUX_PKG_BUILD_IN_SRC=yes
 
-termux_step_pre_make () {
+termux_step_post_configure() {
 	LDFLAGS+=" -lncurses"
 	CFLAGS+=" $CPPFLAGS"
 }

packages/zile/build.sh

@@ -6,7 +6,7 @@ TERMUX_PKG_SRCURL=https://mirrors.kernel.org/gnu/zile/zile-${TERMUX_PKG_VERSION}
 TERMUX_PKG_DEPENDS="libgc, ncurses"
 TERMUX_PKG_BUILD_IN_SRC=yes
 
-termux_step_pre_make () {
+termux_step_post_configure() {
 	# zile uses help2man to build the zile.1 man page, which would require
 	# a host build. To avoid that just copy a pre-built man page.
 	cp $TERMUX_PKG_BUILDER_DIR/zile.1 $TERMUX_PKG_BUILDDIR/doc/zile.1