Create a separate rootfs image for Yggdrasil (#243)

* Create a separate rootfs image for Yggdrasil

* The Yggdrasil image does not require any custom locales

* Upgrade from `libicu63` to `libicu67`

.github/workflows/linux.yml

@@ -102,6 +102,9 @@ jobs:
           # The `xvfb` image is used in the CI for the PkgEval.jl repo
           - 'xvfb.aarch64'
           - 'xvfb.x86_64'
+
+          # The `yggdrasil` image is used in the CI for the Yggdrasil repo
+          - 'yggdrasil.x86_64'
     steps:
       - uses: actions/checkout@v2
       - uses: julia-actions/setup-julia@v1

linux/yggdrasil.jl

@@ -0,0 +1,37 @@
+using RootfsUtils: parse_build_args, upload_gha, test_sandbox
+using RootfsUtils: debootstrap
+using RootfsUtils: root_chroot
+
+args         = parse_build_args(ARGS, @__FILE__)
+arch         = args.arch
+archive      = args.archive
+image        = args.image
+
+packages = [
+    "apt-transport-https",
+    "bzip2",
+    "curl",
+    "expect",
+    "git",
+    "gnupg2",
+    "iproute2",
+    "jq",
+    "libgomp1",
+    "libicu67",
+    "localepurge",
+    "locales",
+    "openssh-client",
+    "openssl",
+    "p7zip",
+    "python3",
+    "ssh",
+    "unzip",
+    "vim",
+    "wget",
+    "xz-utils",
+    "zstd",
+]
+
+artifact_hash, tarball_path, = debootstrap(arch, image; archive, packages)
+upload_gha(tarball_path)
+test_sandbox(artifact_hash)