Variety of improvements

- Rename sources to distfiles for clarity.
- Per sys(a/c) distfiles to reduce rootfs.py processing and reduce RAM
  usage in sysa.
- Canonicalise early kaem mes/tcc files to kaem script conventions.
- Cleanup unused setup in python.

sysa/helpers.sh

@@ -118,7 +118,7 @@ build() {
     echo "${pkg}: unpacking source."
     build_stage=src_unpack
     call $build_stage
-    unset EXTRA_SRCS
+    unset EXTRA_DISTFILES
 
     cd "${dirname}" || (echo "Cannot cd into build/${dirname}!"; kill $$)
 
@@ -153,8 +153,6 @@ build() {
     echo "${pkg}: creating package."
     cd "${DESTDIR}"
     src_pkg
-    # Various shenanigans must be implemented for repoducibility
-    # as a result of timestamps
 
     src_checksum
 
@@ -171,36 +169,31 @@ build() {
     cd "${SOURCES}"
 
     unset -f src_unpack src_prepare src_configure src_compile src_install
-    unset checksum
 }
 
 # Default unpacking function that unpacks all source tarballs.
 default_src_unpack() {
-    SRCS=$EXTRA_SRCS
-    for f in "/sources/${pkg}."*; do
-        SRCS="$(basename "$f") ${SRCS}"
+    distfiles=${EXTRA_DISTFILES}
+    # shellcheck disable=SC2153
+    for f in "${DISTFILES}/${pkg}."*; do
+        distfiles="$(basename "$f") ${distfiles}"
     done
 
     # Check for new tar
+    # shellcheck disable=SC2153
     if test -e "${PREFIX}/libexec/rmt"; then
-        for i in $SRCS; do
-            tar --no-same-owner -xf "/sources/${i}"
+        for i in ${distfiles}; do
+            tar --no-same-owner -xf "${DISTFILES}/${i}"
         done
     else
-        for i in $SRCS; do
+        for i in ${distfiles}; do
             case "$i" in
-            *.tar.gz)
-                tar -xzf "/sources/${i}"
-                ;;
+            *.tar.gz) tar -xzf "${DISTFILES}/${i}" ;;
             *.tar.bz2)
                 # Initial bzip2 built against meslibc has broken pipes
-                bzip2 --decompress --keep "/sources/${i}"
-                tar -xf "/sources/${i%.bz2}"
-                rm "/sources/${i%.bz2}"
-                ;;
+                bzip2 -dc "${DISTFILES}/${i}" | tar -xf - ;;
             *.tar.xz)
-                tar -xf "/sources/${i}" --use-compress-program=xz
-                ;;
+                tar -xf "${DISTFILES}/${i}" --use-compress-program=xz ;;
             esac
         done
     fi
@@ -297,9 +290,8 @@ src_apply() {
                 rm -f "/${file}" >/dev/null 2>&1 || true
             done < /tmp/filelist.txt
         fi
-        bzip2 --decompress --keep "/usr/src/repo/${pkg}_${revision}.tar.bz2"
-        tar -C / -xpf "/usr/src/repo/${pkg}_${revision}.tar"
-        rm "/usr/src/repo/${pkg}_${revision}.tar"
+        bzip2 -dc "/usr/src/repo/${pkg}_${revision}.tar.bz2" | \
+            tar -C / -xpf -
         # shellcheck disable=SC2162
         # ^ read -r unsupported in old bash
         while read line; do