Update build to use zigbuild instead of cross

Signed-off-by: Jacob Kiers <code@kiers.eu>

.drone.jsonnet

@@ -1,5 +1,5 @@
 local executableName = 'newsletter-to-web';
-local cross_image = 'img.kie.rs/jjkiers/rust-dind-cross:1.66-full';
+local build_image = 'rust:1.70';
 
 local archs = [
   { target: 'aarch64-unknown-linux-musl', short: 'arm64-musl' },
@@ -15,7 +15,7 @@ local targetExecutableName(arch) = executableName + '-' + arch.target + if std.l
 local add_build_steps() = [
   {
     name: getStepName(arch),
-    image: cross_image,
+    image: build_image,
     volumes: [
       {
         name: 'dockersock',
@@ -24,13 +24,12 @@ local add_build_steps() = [
     ],
     commands: [
       'echo Hello World from Jsonnet on ' + arch.target + '!',
-      'cross build --release --target ' + arch.target,
+      'rustup target add ' + arch.target,
+      'scripts/prepare-build.sh',
+      'cross zigbuild --release --target ' + arch.target,
       'cp target/' + arch.target + '/release/' + builtExecutableName(arch) + ' artifacts/' + targetExecutableName(arch),
       'rm -rf target/' + arch.target + '/release/*',
     ],
-    environment: {
-      CROSS_REMOTE: true,
-    },
     depends_on: ['Wait for Docker'],
   }
   for arch in archs
@@ -46,10 +45,10 @@ local add_build_steps() = [
   steps:
     [{
       name: 'Wait for Docker',
-      image: cross_image,
+      image: build_image,
       commands: [
         'mkdir artifacts',
-        'echo Using image: ' + cross_image,
+        'echo Using image: ' + build_image,
         'while ! docker image ls; do sleep 1; done',
         'cargo --version',
         'rustc --version',
@@ -68,7 +67,7 @@ local add_build_steps() = [
     [
       {
         name: 'Show built artifacts',
-        image: cross_image,
+        image: build_image,
         commands: [
           'ls -lah artifacts',
         ],

scripts/prepare-build.sh

@@ -0,0 +1,39 @@
+#!/usr/bin/env bash
+set -x
+apt-get update && apt-get install -y jq curl
+
+# Install minisign
+wget https://github.com/jedisct1/minisign/releases/download/0.11/minisign-0.11-linux.tar.gz -O - | tar --strip-components 2 -C /usr/local/bin/ -vxzf - minisign-linux/x86_64/minisign
+
+# Installing zig, checking its validity
+mkdir -p /usr/local/bin
+wget https://ziglang.org/download/index.json -O zig-versions.json
+
+echo "$(jq -r '.master."x86_64-linux".shasum' zig-versions.json) zig.tar.xz" > zig.tar.xz.shasum
+wget -c $(jq -r '.master."x86_64-linux".tarball' zig-versions.json) -O zig.tar.xz
+wget -c "$(jq -r '.master."x86_64-linux".tarball' zig-versions.json).minisig" -O zig.tar.xz.minisig
+sha256sum -c zig.tar.xz.shasum
+
+if [ $? -ne 0 ]; then
+  echo "Error in SHA256 hash!"
+  exit 1
+else
+  echo "SHA256 hash OK"
+fi
+
+minisign -P 'RWSGOq2NVecA2UPNdBUZykf1CCb147pkmdtYxgb3Ti+JO/wCYvhbAb/U' -Vm zig.tar.xz
+
+if [ $? -ne 0 ]; then
+  echo "Error in signature!"
+  exit 1
+else
+  echo "Signature OK"
+fi
+
+tar -C /usr/local/bin --strip-components 1 -xf zig.tar.xz
+
+rm -rf zig*
+
+# Installing binstall and zigbuild
+curl -L --proto '=https' --tlsv1.2 -sSf https://raw.githubusercontent.com/cargo-bins/cargo-binstall/main/install-from-binstall-release.sh | bash
+cargo binstall -y cargo-zigbuild