Release prep: 0.8.0 and a Linux riscv64 release build (#669)

* Release prep: bump to 0.8.0 and add a Linux riscv64 release build

- release.yml: new `linux-riscv64` job, ported from GridCraft. It cross-compiles on
  ubuntu-24.04 against riscv64 libraries from ports.ubuntu.com (the Linux job's X11/Wayland/GL
  -dev packages plus ALSA), ships effectcraft-<v>-linux-riscv64.tar.gz, and smoke-tests
  effectcraft-cli under qemu-riscv64. The draft-release job now needs it, so its tarball is
  uploaded and covered by SHA256SUMS.txt.
- packaging/linux/package.sh: cross-compiles when CROSS_ARCH/CROSS_TARGET/CROSS_COMPILE are set
  (cargo --target, the cross strip, the EMULATOR smoke test), as GridCraft's does.
- Version 0.7.0 -> 0.8.0 (cargo xtask version set), Cargo.lock refreshed.
- README and docs/releasing.md list the riscv64 tarball.

Co-Authored-By: Claude Opus 5.5 <[email protected]>

* Fix FreeBSD CI: pointer_wrap test harness, wasm32 target, clippy as_chunks

- pointer_wrap tests: the harnesses dropped run_ui's FullOutput with the font atlas upload still
  in textures_delta, and epaint 0.36's drop check panics on that in debug builds. Every
  pointer_wrap test failed on every platform; FreeBSD is the only CI that runs them. Clear the
  delta, as the other UI tests do.
- freebsd.yml: install wasm32-unknown-unknown in the VM. Without it the host plug-in test's build
  of examples/plugins/posterize-bands failed (E0463, no std) and the test skipped silently; now
  it builds and runs.
- media/convert.rs: chunks_exact(2) -> as_chunks::<2>() (clippy chunks_exact_to_as_chunks,
  new in Rust 1.99); same pairs, same dropped remainder.

Co-Authored-By: Claude Opus 5.5 <[email protected]>

---------

Co-authored-by: Claude Opus 5.5 <[email protected]>

packaging/linux/package.sh

@@ -1,5 +1,5 @@
 #!/usr/bin/env bash
-# Build and package EffectCraft for Linux (<arch> is x86_64 or aarch64):
+# Build and package EffectCraft for Linux (<arch> is x86_64 or aarch64, or riscv64 when cross-compiling):
 #
 #   $DIST/effectcraft-<version>-linux-<arch>.AppImage  any distro with glibc >= the build host's
 #   $DIST/effectcraft-<version>-linux-<arch>.AppImage.zsync  delta updates (needs zsyncmake)
@@ -13,6 +13,10 @@
 # (downloaded into $CARGO_TARGET_DIR if missing). Build on an old distro (CI: Ubuntu 22.04,
 # glibc 2.35) so the binaries run on newer ones. Optional: desktop-file-validate, appstreamcli,
 # zsyncmake (the zsync package) for the AppImage's .zsync.
+#
+# Cross-compiling (CI: riscv64, tar only): set CROSS_ARCH (riscv64), CROSS_TARGET (the Rust target),
+# CROSS_COMPILE (the binutils prefix, for strip) and optionally EMULATOR (qemu-riscv64) to smoke-test
+# the CLI.
 set -euo pipefail
 # shellcheck source=../env.sh
 . "$(dirname "${BASH_SOURCE[0]}")/../env.sh"
@@ -25,13 +29,14 @@ while [ $# -gt 0 ]; do
   case "$1" in
     --skip-build) SKIP_BUILD=1; shift ;;
     --formats) FORMATS="$2"; shift 2 ;;
-    -h | --help) sed -n '2,17p' "$0"; exit 0 ;;
+    -h | --help) sed -n '2,19p' "$0"; exit 0 ;;
     *) echo "unknown argument: $1" >&2; exit 2 ;;
   esac
 done
 
-ARCH="$(uname -m)"
+ARCH="${CROSS_ARCH:-$(uname -m)}"
 case "$ARCH" in
+  riscv64) DEB_ARCH=riscv64 ;;
   x86_64) DEB_ARCH=amd64 ;;
   aarch64 | arm64) ARCH=aarch64; DEB_ARCH=arm64 ;;
   *) echo "unsupported architecture $ARCH" >&2; exit 2 ;;
@@ -42,9 +47,13 @@ BASENAME="effectcraft-$VERSION-linux-$ARCH"
 echo "==> EffectCraft $VERSION for Linux $ARCH ($FORMATS)"
 
 if [ "$SKIP_BUILD" = 0 ]; then
-  (cd "$ROOT" && cargo build --release --locked -p effectcraft -p effectcraft-cli)
+  if [ -n "${CROSS_TARGET:-}" ]; then
+    (cd "$ROOT" && cargo build --release --locked -p effectcraft -p effectcraft-cli --target "$CROSS_TARGET")
+  else
+    (cd "$ROOT" && cargo build --release --locked -p effectcraft -p effectcraft-cli)
+  fi
 fi
-BIN="$CARGO_TARGET_DIR/release"
+BIN="$CARGO_TARGET_DIR/${CROSS_TARGET:+$CROSS_TARGET/}release"
 WORK="$CARGO_TARGET_DIR/linux-package"
 STAGE="$WORK/root"
 rm -rf "$WORK"
@@ -52,7 +61,7 @@ rm -rf "$WORK"
 # ---- stage an FHS tree (shared by every format) -------------------------------------------------
 install -Dm755 "$BIN/effectcraft" "$STAGE/usr/bin/effectcraft"
 install -Dm755 "$BIN/effectcraft-cli" "$STAGE/usr/bin/effectcraft-cli"
-strip "$STAGE/usr/bin/effectcraft" "$STAGE/usr/bin/effectcraft-cli" 2>/dev/null || true
+"${CROSS_COMPILE:-}strip" "$STAGE/usr/bin/effectcraft" "$STAGE/usr/bin/effectcraft-cli" 2>/dev/null || true
 install -Dm644 "$HERE/$APP_ID.desktop" "$STAGE/usr/share/applications/$APP_ID.desktop"
 install -Dm644 "$HERE/$APP_ID.mime.xml" "$STAGE/usr/share/mime/packages/$APP_ID.xml"
 mkdir -p "$STAGE/usr/share/metainfo"
@@ -135,6 +144,10 @@ if has appimage; then
   fi
 fi
 
-"$STAGE/usr/bin/effectcraft-cli" --version
+if [ -z "${CROSS_TARGET:-}" ]; then
+  "$STAGE/usr/bin/effectcraft-cli" --version
+elif [ -n "${EMULATOR:-}" ]; then
+  "$EMULATOR" "$STAGE/usr/bin/effectcraft-cli" --version
+fi
 echo "==> done"
 ls -lh "$DIST"