Use .env file for passing environmental variables in sysa.

sysa/run.sh

@@ -195,4 +195,14 @@ build libtool-2.2.4
 
 build bash-5.2.15
 
-exec env -i PATH="${PATH}" PREFIX="${PREFIX}" LIBDIR="${LIBDIR}" SOURCES="${SOURCES}" DISTFILES="${DISTFILES}" DESTDIR="${DESTDIR}" SRCDIR="${SRCDIR}" bash run2.sh
+cat > .env <<- EOF
+export PATH=${PATH}
+PREFIX=${PREFIX}
+LIBDIR=${LIBDIR}
+SOURCES=${SOURCES}
+DESTDIR=${DESTDIR}
+DISTFILES=${DISTFILES}
+SRCDIR=${SRCDIR}
+EOF
+
+exec env -i bash run2.sh

sysa/run2.sh

@@ -8,6 +8,9 @@
 
 set -e
 
+# shellcheck source=/dev/null
+. .env
+
 # shellcheck source=sysa/helpers.sh
 . helpers.sh
 

sysc/init

@@ -66,12 +66,16 @@ ln -s /usr/bin/bash /usr/bin/sh
 # Begin sysc bootstrapping process
 cd "${SOURCES}"
 
-echo "PREFIX=${PREFIX}" > .env
-# shellcheck disable=SC2129
-echo "LIBDIR=${LIBDIR}" >> .env
-echo "SOURCES=${SOURCES}" >> .env
-echo "DESTDIR=${DESTDIR}" >> .env
-echo "DISTFILES=${DISTFILES}" >> .env
-echo "SRCDIR=${SRCDIR}" >> .env
+cat > .env <<- EOF
+export PATH="${PREFIX}/bin:${PREFIX}/sbin"
+export HOME=/tmp
+export SOURCE_DATE_EPOCH=0
+PREFIX=${PREFIX}
+LIBDIR=${LIBDIR}
+SOURCES=${SOURCES}
+DESTDIR=${DESTDIR}
+DISTFILES=${DISTFILES}
+SRCDIR=${SRCDIR}
+EOF
 
 exec ./run.sh

sysc/run.sh

@@ -183,5 +183,5 @@ fi
 echo "Bootstrapping completed."
 
 cd "/"
-exec env -i PATH="${PATH}" HOME="${HOME}" SOURCE_DATE_EPOCH="${SOURCE_DATE_EPOCH}" bash "${SOURCES}/after.sh"
+exec env -i bash "${SOURCES}/after.sh"