abr: only export when defined, cleanup sccache

abr/APKBUILD

@@ -1,6 +1,6 @@
 # Maintainer: psykose <alice@ayaya.dev>
 pkgname=abr
-pkgver=1
+pkgver=2
 pkgrel=0
 pkgdesc="abr~!"
 url="https://git.ddd.rip/ptrcnull/aports"
@@ -40,6 +40,6 @@ package() {
 }
 
 sha512sums="
-1a01d9a9cc3fd29622c803193e7b60c4c5855a65db786cb5d826fdd03a2ab071baff70a6bf01d7cd82e2c638a0691700e7810dca070b30071a0ad4066bc73b13  abr
+77ce846c861098f4a3da15768be1aba6ae4a87dbbddca0146f55b2f6c933b05c6891a649db073f49f4fa33c1e083660a61b54aabbc8b548ebbdacb3b9a385568  abr
 71d8cb1e5e57ff739915fa4de1f5699afa60ab36e2e5219c4c366af5ceab24dc6ee55e738d29ca2b63dd5e387de7661594fc86bf2183d787932e75b4c03c6a9f  apkbuild-anitya
 "

abr/abr

@@ -1,25 +1,26 @@
 #!/bin/sh -e
 
 # clean self and do not pass through any environment
-# except env, because it doesn't matter too much for this specific purpose
+# except path/home, because it doesn't matter too much for this specific purpose,
+# and home is required
 # and a few that are useful to keep some cache paths
 if [ -z "$_CLEAN" ]; then
    exec env -i \
       _CLEAN=1 \
-      CARGO_HOME="$CARGO_HOME" \
-      GNUPGHOME="$GNUPGHOME" \
-      GOCACHE="$GOCACHE" \
-      GOMODCACHE="$GOMODCACHE" \
-      GOPATH="$GOPATH" \
-      GOTMPDIR="$GOTMPDIR" \
       HOME="$HOME" \
       PATH="$PATH" \
-      XDG_CACHE_HOME="$XDG_CACHE_HOME" \
-      XDG_CONFIG_HOME="$XDG_CONFIG_HOME" \
+      ${CARGO_HOME:+CARGO_HOME="$CARGO_HOME"} \
+      ${GNUPGHOME:+GNUPGHOME="$GNUPGHOME"} \
+      ${GOCACHE:+GOCACHE="$GOCACHE"} \
+      ${GOMODCACHE:+GOMODCACHE="$GOMODCACHE"} \
+      ${GOPATH:+GOPATH="$GOPATH"} \
+      ${GOTMPDIR:+GOTMPDIR="$GOTMPDIR"} \
+      ${XDG_CACHE_HOME:+XDG_CACHE_HOME="$XDG_CACHE_HOME"} \
+      ${XDG_CONFIG_HOME:+XDG_CONFIG_HOME="$XDG_CONFIG_HOME"} \
       "$0" "$@"
 fi
 
-while getopts "j:fmnx" opt; do
+while getopts "j:fmnsx" opt; do
    case "$opt" in
    'j')
       jobs="$OPTARG"
@@ -42,6 +43,9 @@ while getopts "j:fmnx" opt; do
    'n')
       nonice=1
       ;;
+   's')
+      nosccache=1
+      ;;
    'x')
       # skip checks
       export ABUILD_BOOTSTRAP=1
@@ -56,18 +60,18 @@ shift "$((OPTIND - 1))"
 
 # loop again to check if rootbld
 for arg; do
-   if eltest "${arg:-x}" =~ "rootbld"; then
-      # not available in rootbld
-      nosccache=1
+   if eltest "$arg" =~ "rootbld" || [ -n "$nosccache" ]; then
+      # pointless in rootbld
+      # TODO: maybe we can mount something into rootbld without patches
+      :
+   else
+      extra="$extra sccache"
+      export RUSTC_WRAPPER=sccache
    fi
 done
 
-if [ -z "$nosccache" ]; then
-   export RUSTC_WRAPPER=sccache
-fi
-
 if [ -z "$nomemhack" ]; then
-   extra="scudo-malloc"
+   extra="$extra scudo-malloc"
    export LD_PRELOAD="/usr/lib/libscudo.so"
 fi