From c394f1085d16881291003a0aae7413de11dc0aff Mon Sep 17 00:00:00 2001
From: icp <pangolin@vivaldi.net>
Date: Fri, 13 Jan 2023 22:21:19 +0530
Subject: [PATCH] Enable usage of rust-sccache for cargo builds

---
 common/build-helper/rust.sh             |  4 ++++
 common/environment/build-style/cargo.sh |  7 +++++++
 common/xbps-src/shutils/chroot.sh       |  4 ++--
 etc/defaults.conf                       |  6 ++++++
 xbps-src                                | 10 +++++++++-
 5 files changed, 28 insertions(+), 3 deletions(-)

diff --git a/common/build-helper/rust.sh b/common/build-helper/rust.sh
index 272d03f52607..e5261a7e7cdf 100644
--- a/common/build-helper/rust.sh
+++ b/common/build-helper/rust.sh
@@ -30,6 +30,10 @@ else
 	unset CARGO_BUILD_TARGET
 fi
 
+if [ -n "$XBPS_SCCACHE" ]; then
+	export RUSTC_WRAPPER="/usr/bin/sccache"
+fi
+
 # For cross-compiling rust -sys crates
 export PKG_CONFIG_ALLOW_CROSS=1
 
diff --git a/common/environment/build-style/cargo.sh b/common/environment/build-style/cargo.sh
index 473750c7a359..4f9e00f47f23 100644
--- a/common/environment/build-style/cargo.sh
+++ b/common/environment/build-style/cargo.sh
@@ -4,6 +4,13 @@ if ! [[ "$pkgname" =~ ^cargo-auditable(-bootstrap)?$ ]]; then
 	hostmakedepends+=" cargo-auditable"
 fi
 
+if [ -n "$XBPS_SCCACHE" ] && [ "$pkgname" != "rust-sccache" ]; then
+	case "$XBPS_MACHINE" in
+		x86_64*|i686*|arm*|aarch64*) hostmakedepends+=" rust-sccache" ;;
+		*) ;;
+	esac
+fi
+
 if [ "$CROSS_BUILD" ]; then
 	makedepends+=" rust-std"
 fi
diff --git a/common/xbps-src/shutils/chroot.sh b/common/xbps-src/shutils/chroot.sh
index 823705030b97..0708e571558b 100644
--- a/common/xbps-src/shutils/chroot.sh
+++ b/common/xbps-src/shutils/chroot.sh
@@ -88,8 +88,8 @@ PATH=/void-packages:/usr/bin
 
 exec env -i -- SHELL=/bin/sh PATH="\$PATH" DISTCC_HOSTS="\$XBPS_DISTCC_HOSTS" DISTCC_DIR="/host/distcc" \
     ${XBPS_ARCH+XBPS_ARCH=$XBPS_ARCH} ${XBPS_CHECK_PKGS+XBPS_CHECK_PKGS=$XBPS_CHECK_PKGS} \
-    CCACHE_DIR="/host/ccache" IN_CHROOT=1 LC_COLLATE=C LANG=en_US.UTF-8 TERM=linux HOME="/tmp" \
-    PS1="[\u@$XBPS_MASTERDIR \W]$ " /bin/bash +h
+    CCACHE_DIR="/host/ccache" SCCACHE_DIR="/host/sccache" IN_CHROOT=1 LC_COLLATE=C LANG=en_US.UTF-8 \
+    TERM=linux HOME="/tmp" PS1="[\u@$XBPS_MASTERDIR \W]$ " /bin/bash +h
 _EOF
 
     chmod 755 $XBPS_MASTERDIR/bin/xbps-shell
diff --git a/etc/defaults.conf b/etc/defaults.conf
index f70e4ea3d006..422f85113625 100644
--- a/etc/defaults.conf
+++ b/etc/defaults.conf
@@ -55,6 +55,12 @@ XBPS_SUCMD="sudo /bin/sh -c"
 #
 #XBPS_CCACHE=yes
 
+# [OPTIONAL]
+# Enable or disable sccache when building packages. The sccache directory
+# is stored in the hostdir, i.e hostdir/sccache.
+#
+#XBPS_SCCACHE=yes
+
 # [OPTIONAL]
 # Enable or disable distcc when building packages. The distcc directory
 # is stored in the hostdir, i.e hostdir/distcc.
diff --git a/xbps-src b/xbps-src
index cdb5f8c6d643..aeed206b8949 100755
--- a/xbps-src
+++ b/xbps-src
@@ -658,7 +658,7 @@ export XBPS_SHUTILSDIR XBPS_CROSSPFDIR XBPS_TRIGGERSDIR \
     XBPS_CMPVER_CMD XBPS_FETCH_CMD XBPS_VERSION XBPS_BUILDSTYLEDIR \
     XBPS_CPPFLAGS XBPS_CFLAGS XBPS_CXXFLAGS XBPS_FFLAGS XBPS_LDFLAGS \
     XBPS_MAKEJOBS XBPS_BUILD_FORCEMODE XBPS_USE_GIT_REVS XBPS_DEBUG_PKGS \
-    XBPS_CHECK_PKGS XBPS_CCACHE XBPS_DISTCC XBPS_DISTCC_HOSTS XBPS_SKIP_DEPS \
+    XBPS_CHECK_PKGS XBPS_SCCACHE XBPS_CCACHE XBPS_DISTCC XBPS_DISTCC_HOSTS XBPS_SKIP_DEPS \
     XBPS_SKIP_REMOTEREPOS XBPS_CROSS_BUILD XBPS_ARG_PKG_OPTIONS XBPS_CONFIG_FILE \
     XBPS_KEEP_ALL XBPS_HOSTDIR XBPS_MASTERDIR XBPS_SRC_VERSION \
     XBPS_DESTDIR XBPS_MACHINE XBPS_TEMP_MASTERDIR XBPS_BINPKG_EXISTS \
@@ -702,6 +702,14 @@ if [ "$XBPS_CCACHE" ]; then
     mkdir -p $CCACHE_DIR
 fi
 
+#
+# Set up sccache
+#
+if [ "$XBPS_SCCACHE" ]; then
+    export SCCACHE_DIR="$XBPS_HOSTDIR/sccache"
+    mkdir -p $SCCACHE_DIR
+fi
+
 #
 # Set up distcc
 #