termux-packages/packages/dropbear/build.sh

TERMUX_PKG_HOMEPAGE=https://matt.ucc.asn.au/dropbear/dropbear.html
TERMUX_PKG_DESCRIPTION="Small SSH server and client"
TERMUX_PKG_LICENSE="BSD"
TERMUX_PKG_VERSION=2020.80
TERMUX_PKG_SRCURL=https://matt.ucc.asn.au/dropbear/releases/dropbear-${TERMUX_PKG_VERSION}.tar.bz2
TERMUX_PKG_SHA256=d927941b91f2da150b2033f1a88b6a47999bf0afb1493a73e9216cffdb5d7949
TERMUX_PKG_DEPENDS="termux-auth, zlib"
TERMUX_PKG_CONFLICTS="openssh"
TERMUX_PKG_BUILD_IN_SRC=true

TERMUX_PKG_EXTRA_CONFIGURE_ARGS="--disable-syslog --disable-utmp --disable-utmpx --disable-wtmp --disable-static"
# Avoid linking to libcrypt for server password authentication:
TERMUX_PKG_EXTRA_CONFIGURE_ARGS+=" ac_cv_lib_crypt_crypt=no"
# build a multi-call binary & enable progress info in 'scp'
TERMUX_PKG_EXTRA_MAKE_ARGS="MULTI=1 SCPPROGRESS=1"

termux_step_pre_configure() {
    export LIBS="-ltermux-auth"
}

termux_step_post_make_install() {
    ln -sf "dropbearmulti" "${TERMUX_PREFIX}/bin/ssh"
}

termux_step_create_debscripts() {
    {
	echo "#!$TERMUX_PREFIX/bin/sh"
	echo "mkdir -p $TERMUX_PREFIX/etc/dropbear"
	echo "for a in rsa dss ecdsa; do"
	echo "	  KEYFILE=$TERMUX_PREFIX/etc/dropbear/dropbear_\${a}_host_key"
	echo "	  test ! -f \$KEYFILE && dropbearkey -t \$a -f \$KEYFILE"
	echo "done"
	echo "exit 0"
    } > postinst
    chmod 0755 postinst
}